fix WebxdcActivity: restore addMultiAccountObserver

accidentally reverted to addObserver while resolving merge conflict

.github/copilot-instructions.md

@@ -8,7 +8,7 @@ ArcaneChat is a Delta Chat Android client built on top of the official Delta Cha
 - **Language:** Java (Java 8 compatibility)
 - **Build System:** Gradle with Android Gradle Plugin 8.11.1
 - **Min SDK:** 21 (Android 5.0)
-- **Target SDK:** 35 (Android 15)
+- **Target SDK:** 36 (Android 16)
 - **NDK Version:** 27.0.12077973
 - **Native Components:** Rust (deltachat-core-rust submodule)
 - **UI Framework:** Android SDK, Material Design Components
@@ -17,13 +17,23 @@ ArcaneChat is a Delta Chat Android client built on top of the official Delta Cha
 ## Repository Structure
 
 - `src/main/` - Main application source code
+  - `src/main/java/org/thoughtcrime/securesms/` - Main UI components
+  - `src/main/java/com/b44t/messenger/` - Delta Chat core integration
+  - `src/main/java/chat/delta/rpc/` - JSON-RPC bindings (generated, don't edit manually)
+  - `src/main/res/` - Android resources (layouts, strings, drawables)
 - `src/androidTest/` - Instrumented tests (UI tests, benchmarks)
+  - `src/androidTest/java/com/b44t/messenger/uitests/` - UI tests
+  - `src/androidTest/java/com/b44t/messenger/uibenchmarks/` - Performance benchmarks
 - `src/gplay/` - Google Play flavor-specific code
 - `src/foss/` - F-Droid/FOSS flavor-specific code
-- `jni/deltachat-core-rust/` - Native Rust core library (submodule)
+- `jni/deltachat-core-rust/` - Native Rust core library (submodule, **don't edit directly**)
 - `scripts/` - Build and helper scripts
+  - `scripts/ndk-make.sh` - Build native libraries
+  - `scripts/install-toolchains.sh` - Install Rust cross-compilation toolchains
+  - `scripts/generate-rpc-bindings.sh` - Generate JSON-RPC bindings
 - `docs/` - Documentation
 - `fastlane/` - App store metadata and screenshots
+- `.github/workflows/` - CI/CD workflows (GitHub Actions)
 
 ## Build Instructions
 
@@ -33,17 +43,36 @@ ArcaneChat is a Delta Chat Android client built on top of the official Delta Cha
    ```bash
    git submodule update --init --recursive
    ```
+   This MUST be done first before any build attempts.
 
-2. **Build native libraries:**
+2. **Set up environment variables:**
+   ```bash
+   export ANDROID_NDK_ROOT=/path/to/ndk/27.0.12077973
+   export PATH=${PATH}:${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/:${ANDROID_NDK_ROOT}
+   ```
+   Note: Path format varies by OS (linux-x86_64, darwin-x86_64, etc.)
+
+3. **Install Rust toolchains:**
+   ```bash
+   scripts/install-toolchains.sh
+   ```
+   Required for building the native Rust components.
+
+4. **Build native libraries:**
    ```bash
    scripts/ndk-make.sh
    ```
-   Note: First run may take significant time as it builds for all architectures (armeabi-v7a, arm64-v8a, x86, x86_64)
+   **IMPORTANT:** First run takes 30-60 minutes as it builds for all architectures (armeabi-v7a, arm64-v8a, x86, x86_64).
+   For faster development builds, build for a single architecture:
+   ```bash
+   scripts/ndk-make.sh armeabi-v7a
+   ```
 
-3. **Build APK:**
+5. **Build APK:**
    ```bash
    ./gradlew assembleDebug
    ```
+   Build time: ~2-5 minutes after native libraries are built.
 
 ### Build Flavors
 
@@ -55,6 +84,24 @@ ArcaneChat is a Delta Chat Android client built on top of the official Delta Cha
 - Debug APKs: `build/outputs/apk/gplay/debug/` and `build/outputs/apk/fat/debug/`
 - Release APKs require signing configuration in `~/.gradle/gradle.properties`
 
+### Common Build Issues
+
+1. **Missing NDK or incorrect version:**
+   - Error: `ANDROID_NDK_ROOT not set` or native library missing
+   - Solution: Install NDK 27.0.12077973 and set ANDROID_NDK_ROOT environment variable
+
+2. **Submodules not initialized:**
+   - Error: Missing deltachat-core-rust files
+   - Solution: Run `git submodule update --init --recursive`
+
+3. **Gradle wrapper validation:**
+   - Always validate gradle wrapper before building: `./gradlew wrapper --gradle-version=current`
+   - Wrapper is validated in CI via `gradle/actions/wrapper-validation@v4`
+
+4. **Clean build issues:**
+   - If build fails, try: `./gradlew clean && scripts/ndk-make.sh && ./gradlew assembleDebug`
+   - Remove `build/` directory if clean doesn't work
+
 ## Testing
 
 ### Running Unit Tests
@@ -62,16 +109,19 @@ ArcaneChat is a Delta Chat Android client built on top of the official Delta Cha
 ```bash
 ./gradlew test
 ```
+Expected duration: 1-3 minutes
 
 ### Running Instrumented Tests
 
 1. **Disable animations** on your device/emulator:
    - Developer Options → Set "Window animation scale", "Transition animation scale", and "Animator duration scale" to 0x
+   - **CRITICAL:** Tests will fail if animations are enabled
 
 2. **Run tests:**
    ```bash
    ./gradlew connectedAndroidTest
    ```
+   Expected duration: 10-30 minutes depending on device/emulator
 
 ### Online Tests
 
@@ -129,6 +179,14 @@ TEST_MAIL_PW=yourpassword
 - Java bindings are in `src/main/java/com/b44t/messenger/Dc*.java`
 - JSON-RPC bindings in `chat.delta.rpc.*` package (generated via dcrpcgen)
 
+### Generating JSON-RPC Bindings
+
+To regenerate JSON-RPC bindings after core changes:
+```bash
+./scripts/generate-rpc-bindings.sh
+```
+**Note:** Requires Rust tooling and [dcrpcgen tool](https://github.com/chatmail/dcrpcgen) installed
+
 ### Working with Translations
 
 - Translations managed via Transifex (not in repository)
@@ -142,6 +200,43 @@ Decode crash symbols:
 $ANDROID_NDK_ROOT/ndk-stack --sym obj/local/armeabi-v7a --dump crash.txt > decoded.txt
 ```
 
+## Validation and Quality Checks
+
+### Pre-commit Checks
+
+Before committing changes, always run:
+
+1. **Gradle wrapper validation:**
+   ```bash
+   ./gradlew wrapper --gradle-version=current
+   ```
+
+2. **Build verification:**
+   ```bash
+   ./gradlew assembleDebug
+   ```
+
+3. **Unit tests:**
+   ```bash
+   ./gradlew test
+   ```
+
+4. **Code style:** Match existing code style in modified files (no automatic formatter configured)
+
+### When to Rebuild Native Libraries
+
+Rebuild native libraries (`scripts/ndk-make.sh`) when:
+- Updating deltachat-core-rust submodule
+- Modifying anything in `jni/` directory
+- Changing NDK version
+- After `git clean -fdx` or fresh clone
+
+**DO NOT** rebuild native libraries for:
+- Pure Java/Kotlin code changes
+- Resource file changes
+- Gradle configuration changes (unless changing native library linking)
+- Documentation updates
+
 ## WebXDC Support
 
 ArcaneChat has extended WebXDC support:
@@ -152,12 +247,24 @@ ArcaneChat has extended WebXDC support:
 
 ## Important Files
 
-- `build.gradle` - Main build configuration
+- `build.gradle` - Main build configuration (Android Gradle Plugin 8.11.1, Java 8 compatibility)
 - `CONTRIBUTING.md` - Contribution guidelines
-- `BUILDING.md` - Detailed build setup
+- `BUILDING.md` - Detailed build setup instructions
 - `RELEASE.md` - Release process
-- `proguard-rules.pro` - ProGuard configuration
-- `google-services.json` - Firebase configuration (gplay flavor)
+- `proguard-rules.pro` - ProGuard configuration (enabled for both debug and release)
+- `google-services.json` - Firebase configuration (gplay flavor only)
+- `settings.gradle` - Gradle settings
+- `.github/workflows/` - CI/CD configuration
+
+## Dependencies and Constraints
+
+- **Java Version:** Java 8 compatibility (do not use Java 9+ features)
+- **Gradle:** Use wrapper (`./gradlew`) to ensure correct Gradle version
+- **NDK:** Must use version 27.0.12077973 (specified in build.gradle)
+- **Min SDK:** 21 (Android 5.0) - code must be compatible
+- **Target SDK:** 36 (Android 16) - test on this API level when possible
+- **ProGuard:** Always enabled - ensure ProGuard rules are correct for new dependencies
+- **Multi-dex:** Enabled - app exceeds 65k method limit
 
 ## Package Structure
 
@@ -173,3 +280,35 @@ ArcaneChat has extended WebXDC support:
 - Native library must be rebuilt after core changes
 - ProGuard is enabled in both debug and release builds
 - Multi-dex is enabled due to app size
+
+## CI/CD Workflows
+
+### Preview APK Workflow (.github/workflows/preview-apk.yml)
+
+Runs on every pull request to build and upload a preview APK:
+
+1. **Setup steps:**
+   - Checks out repository with submodules
+   - Validates Fastlane metadata
+   - Sets up Rust cache (working-directory: jni/deltachat-core-rust)
+   - Sets up Java 17 (Temurin distribution)
+   - Sets up Android SDK
+   - Caches Gradle dependencies
+   - Sets up NDK r27
+
+2. **Build process:**
+   ```bash
+   scripts/install-toolchains.sh && scripts/ndk-make.sh armeabi-v7a
+   ./gradlew --no-daemon -PABI_FILTER=armeabi-v7a assembleFossDebug
+   ```
+   Note: Builds only armeabi-v7a for faster CI builds
+
+3. **Output:** Uploads APK artifact to GitHub Actions
+
+### Important CI Considerations
+
+- Always validate Gradle wrapper before committing changes
+- Fastlane metadata must be valid (validated in CI)
+- Use `--no-daemon` flag for Gradle in CI environments
+- CI builds use FOSS flavor to avoid Google Services dependencies
+- Expected CI build time: 15-25 minutes for full workflow

.github/workflows/artifacts.yml

@@ -1,20 +0,0 @@
-name: add artifact links to pull request
-on:
-  workflow_run:
-    workflows: ["Upload Preview APK"]
-    types: [completed]
-
-jobs:
-  artifacts-url-comments:
-    name: add artifact links to pull request
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    steps:
-      - name: add artifact links to pull request
-        uses: tonyhallett/artifacts-url-comments@v1.1.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          prefix: "**To test the changes in this pull request, install this apk:**"
-          format: "[📦 {name}]({url})"
-          addTo: pull

.github/workflows/cache-core.yml

@@ -0,0 +1,53 @@
+name: Core Cache
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'jni/deltachat-core-rust'
+      - 'jni/Android.mk'
+      - 'jni/Application.mk'
+      - 'jni/dc_wrapper.c'
+      - 'scripts/ndk-make.sh'
+
+permissions: {}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          submodules: recursive
+          persist-credentials: false
+
+      - uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1
+      - uses: nttld/setup-ndk@ed92fe6cadad69be94a966a7ee3271275e62f779 # v1.6.0
+        id: setup-ndk
+        with:
+          ndk-version: "r29"
+
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
+        with:
+          workspaces: jni/deltachat-core-rust
+
+      - name: Get deltachat-core-rust submodule hash
+        id: core-hash
+        run: echo "hash=$(git rev-parse HEAD:jni/deltachat-core-rust)" >> $GITHUB_OUTPUT
+
+      - name: Cache compiled core
+        id: cache-core
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: |
+            jni/arm64-v8a
+            libs/arm64-v8a
+          key: core-arm64-v8a-${{ steps.core-hash.outputs.hash }}-${{ hashFiles('jni/Android.mk', 'jni/Application.mk', 'jni/dc_wrapper.c', 'scripts/ndk-make.sh') }}-ndk-r27
+
+      - name: Compile core
+        if: steps.cache-core.outputs.cache-hit != 'true'
+        env:
+          ANDROID_NDK_ROOT: ${{ steps.setup-ndk.outputs.ndk-path }}
+        run: |
+          export PATH="${PATH}:${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/"
+          scripts/install-toolchains.sh && scripts/ndk-make.sh arm64-v8a

.github/workflows/code-format.yml

@@ -0,0 +1,49 @@
+name: Code Format
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  spotless:
+    name: Check code format (Spotless)
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          java-version: 17
+          distribution: temurin
+      - name: Restore Gradle cache
+        id: gradle-cache
+        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+      - name: Validate Gradle Wrapper
+        uses: gradle/actions/wrapper-validation@50e97c2cd7a37755bbfafc9c5b7cafaece252f6e # v6.1.0
+      - name: Check formatting
+        run: ./gradlew spotlessCheck
+      - name: Save Gradle cache
+        if: github.event_name == 'push' && steps.gradle-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}

.github/workflows/preview-apk.yml

@@ -6,25 +6,30 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
 
+permissions: {}
+
 jobs:
   build:
     name: Upload Preview APK
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           submodules: recursive
+          persist-credentials: false
+
       - name: Validate Fastlane Metadata
-        uses: ashutoshgngwr/validate-fastlane-supply-metadata@v2
-      - uses: Swatinem/rust-cache@v2
-        with:
-          working-directory: jni/deltachat-core-rust
-      - uses: actions/setup-java@v5
+        uses: ashutoshgngwr/validate-fastlane-supply-metadata@c8857fdbbd3e00f9a5cbe8604bcecfa95ce8fef8 # v2.1.0
+
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           java-version: 17
           distribution: 'temurin'
-      - uses: android-actions/setup-android@v3
-      - uses: actions/cache@v4
+
+      - uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: |
             ~/.gradle/caches
@@ -32,26 +37,63 @@ jobs:
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
-      - uses: nttld/setup-ndk@v1
-        id: setup-ndk
-        with:
-          ndk-version: r27
 
       - name: Validate Gradle Wrapper
-        uses: gradle/actions/wrapper-validation@v4
+        uses: gradle/actions/wrapper-validation@50e97c2cd7a37755bbfafc9c5b7cafaece252f6e # v6.1.0
+
+      - uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1
+      - uses: nttld/setup-ndk@ed92fe6cadad69be94a966a7ee3271275e62f779 # v1.6.0
+        id: setup-ndk
+        with:
+          ndk-version: "r29"
+
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
+        with:
+          workspaces: jni/deltachat-core-rust
+
+      - name: Get deltachat-core-rust submodule hash
+        id: core-hash
+        run: echo "hash=$(git rev-parse HEAD:jni/deltachat-core-rust)" >> $GITHUB_OUTPUT
+
+      - name: Restore compiled core
+        id: core-cache
+        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: |
+            jni/arm64-v8a
+            libs/arm64-v8a
+          key: core-arm64-v8a-${{ steps.core-hash.outputs.hash }}-${{ hashFiles('jni/Android.mk', 'jni/Application.mk', 'jni/dc_wrapper.c', 'scripts/ndk-make.sh') }}-ndk-r27
 
       - name: Compile core
+        if: steps.core-cache.outputs.cache-hit != 'true'
         env:
           ANDROID_NDK_ROOT: ${{ steps.setup-ndk.outputs.ndk-path }}
         run: |
           export PATH="${PATH}:${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/"
-          scripts/install-toolchains.sh && scripts/ndk-make.sh armeabi-v7a
+          scripts/install-toolchains.sh && scripts/ndk-make.sh arm64-v8a
 
       - name: Build APK
-        run: ./gradlew --no-daemon -PABI_FILTER=armeabi-v7a assembleFossDebug
+        run: ./gradlew --no-daemon -PABI_FILTER=arm64-v8a assembleFossDebug
 
       - name: Upload APK
-        uses: actions/upload-artifact@v4
+        id: upload
+        if: github.event.pull_request.head.repo.full_name == github.repository
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: app-preview.apk
           path: 'build/outputs/apk/foss/debug/*.apk'
+
+      - name: Add artifact links to PR
+        if: github.event.pull_request.head.repo.full_name == github.repository
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        env:
+          ARTIFACT_URL: ${{ steps.upload.outputs.artifact-url }}
+        with:
+          script: |
+            const url = process.env.ARTIFACT_URL;
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body: `**To test the changes in this pull request, install this apk:**\n\n[📦 app-preview.apk](${url})`,
+            });

.github/workflows/release.yml

@@ -23,18 +23,18 @@ jobs:
     name: Upload Release APK
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           submodules: recursive
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
         with:
           working-directory: jni/deltachat-core-rust
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           java-version: 17
           distribution: 'temurin'
-      - uses: android-actions/setup-android@v3
-      - uses: nttld/setup-ndk@v1
+      - uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1
+      - uses: nttld/setup-ndk@ed92fe6cadad69be94a966a7ee3271275e62f779 # v1.6.0
         id: setup-ndk
         with:
           ndk-version: r27
@@ -59,23 +59,16 @@ jobs:
           rm build/outputs/apk/foss/release/*universal*
           ./gradlew assembleGplayRelease
           mv build/outputs/apk/gplay/release/*universal* build/outputs/apk/foss/release/ArcaneChat-gplay.apk
+          mv build/outputs/mapping/fossRelease/mapping.txt build/outputs/mapping/fossRelease/mapping-foss.txt
+          mv build/outputs/mapping/gplayRelease/mapping.txt build/outputs/mapping/fossRelease/mapping-gplay.txt
 
       - name: Release on GitHub
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v3.0.0
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
           body: '[<img src="store/get-it-on-gplay.png" alt="Get it on Google Play" height="48">](https://play.google.com/store/apps/details?id=com.github.arcanechat) [<img src="store/get-it-on-fdroid.png" alt="Get it on F-Droid" height="48">](https://f-droid.org/packages/chat.delta.lite) [<img src="store/get-it-on-github.png" alt="Get it on GitHub" height="48">](https://github.com/ArcaneChat/android/releases/latest/download/ArcaneChat-gplay.apk)'
           prerelease: ${{ contains(github.event.ref, '-beta') }}
           fail_on_unmatched_files: true
-          files: build/outputs/apk/foss/release/*.apk
-
-      - name: Release on ZapStore
-        run: |
-          export CHECKSUM=6e2c7cf6da53c3f1a78b523a6aacd6316dce3d74ace6f859c2676729ee439990
-          curl -sL https://cdn.zapstore.dev/$CHECKSUM -o zapstore
-          if echo "$CHECKSUM zapstore" | sha256sum -c --status; then
-            chmod +x zapstore
-            SIGN_WITH=${{ secrets.NOSTR_KEY }} ./zapstore publish --indexer-mode
-          else
-            echo "ERROR: checksum doesn't match!"
-          fi
+          files: |
+            build/outputs/apk/foss/release/*.apk
+            build/outputs/mapping/fossRelease/mapping-*.txt

.github/workflows/zizmor-scan.yml

@@ -0,0 +1,26 @@
+name: GitHub Actions Security Analysis with zizmor
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Run zizmor
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write # Required for upload-sarif (used by zizmor-action) to upload SARIF files.
+      contents: read
+      actions: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3

.github/zizmor.yml

@@ -0,0 +1,6 @@
+rules:
+  unpinned-uses:
+    config:
+      policies:
+        actions/*: ref-pin
+        dependabot/*: ref-pin

BUILDING.md

@@ -27,7 +27,7 @@ install Rust tooling (read sections below) and the [dcrpcgen tool](https://githu
 then generate the code running the script:
 
 ```
-./scripts/generate-rpc-bindings.sh
+./scripts/update-rpc-bindings.sh
 ```
 
 ## Build Using Nix
@@ -47,7 +47,7 @@ Nix development environment contains Rust with cross-compilation toolchains and
 
 To [build an APK](https://developer.android.com/studio/build/building-cmdline) run the following 2 steps.
 Note that the first step may take some time to build for all architectures. You can optionally read 
-[the first comment block in the `ndk-make.sh` script](https://github.com/deltachat/deltachat-android/blob/master/scripts/ndk-make.sh) 
+[the first comment block in the `ndk-make.sh` script](./scripts/ndk-make.sh)
 for pointers on how to build for a specific architecture.
 ```
 $ scripts/ndk-make.sh
@@ -56,7 +56,7 @@ $ ./gradlew assembleDebug
 
 Resulting APK files can be found in
 `build/outputs/apk/gplay/debug/` and
-`build/outputs/apk/fat/debug/`.
+`build/outputs/apk/foss/debug/`.
 
 ## Build Using Dockerfile
 
@@ -114,7 +114,7 @@ deltachat@6012dcb974fe:/home/app$ ./gradlew assembleDebug
 
   In /etc/containers/storage.conf, replace the line: `driver = ""` with: `driver = "overlay"`.
   You can also set the `driver` option to something else, you just need to set it to _something_.
-  [Read about possible options here](https://github.com/containers/storage/blob/master/docs/containers-storage.conf.5.md#storage-table).
+  [Read about possible options here](https://github.com/containers/storage/blob/main/docs/containers-storage.conf.5.md#storage-table).
 
 ## <a name="setup-podman"></a>Setup Podman
 
@@ -135,8 +135,8 @@ See https://wiki.archlinux.org/index.php/Podman#Rootless_Podman for more informa
 
 To setup build environment manually:
 - _Either_, in Android Studio, go to "Tools / SDK Manager / SDK Tools", enable "Show Package Details",
-  select "CMake" and the desired NDK (install the same NDK version as the [Dockerfile](https://github.com/deltachat/deltachat-android/blob/master/Dockerfile)), hit "Apply".
-- _Or_ read [Dockerfile](https://github.com/deltachat/deltachat-android/blob/master/Dockerfile) and mimic what it does.
+  select "CMake" and the desired NDK (install the same NDK version as the [Dockerfile](./Dockerfile)), hit "Apply".
+- _Or_ read [Dockerfile](./Dockerfile) and mimic what it does.
 
 Then, in both cases, install Rust using [rustup](https://rustup.rs/)
 and Rust toolchains for cross-compilation by executing `scripts/install-toolchains.sh`.
@@ -243,3 +243,15 @@ $ANDROID_NDK_ROOT/ndk-stack --sym obj/local/armeabi-v7a --dump crash.txt > decod
 `obj/local/armeabi-v7a` is the extracted path from `deltachat-gplay-release-X.X.X.apk-symbols.zip` file from https://download.delta.chat/android/symbols/
 
 Replace `armeabi-v7a` by the correct architecture the logs come from (can be guessed by trial and error)
+
+
+### Deobfuscating Java Stack Traces
+
+Because the app uses code minification (ProGuard/R8), Java stack traces in crash reports are obfuscated.
+To decode them, use `retrace` with the `mapping.txt` file that is included in the symbols zip:
+
+```
+retrace mapping.txt crash.txt > decoded-crash.txt
+```
+
+`mapping.txt` is extracted from the same `deltachat-gplay-release-X.X.X.apk-symbols.zip` file available at https://download.delta.chat/android/symbols/

CHANGELOG-upstream.md

@@ -1,5 +1,161 @@
 # Delta Chat Android Changelog
 
+## Unreleased
+
+* Allow to select multiple files for sending
+* Add notifications for missed calls
+* Video call preview now accurately shows what is sent to remote
+* Fix: properly hide draft attachment during in-chat search
+* Fix: close mini-apps and chats if they are deleted
+* Fix: cancel in-chat search when back is pressed, instead of directly returning to chatlist
+
+## v2.53.0
+2026-06
+
+* Use message style notifications for longer message previews
+* Remove notification after audio playback ends
+* Fix: do not allow blocked contacts to use our invite links
+* Fix sending mini-app that was used/prepared before sending
+* Some more small fixes and updated translations
+* Update to core 2.53.0
+
+## v2.52.0
+2026-06
+
+* Fix: avoid crashes in Media preview sometimes
+* Fix: Incorrect total time when attaching audio files as draft
+* Fix: Audio files in draft showing total time from wrong file
+* Fix: Update the channel title after joining if the QR code had an outdated title
+* Voice recording will be automatically saved as draft when interrupted
+* Update to core 2.52.0
+
+## v2.51.0
+2026-06
+
+* Better incoming call system integration
+* Calls are not experimental anymore and don't need to be manually enabled
+* Calls can be answered by tapping messages
+* Notify the user when they try to make a call while the device is offline
+* Channels are no longer experimental and are available by default
+* Display a permanent notification when doing location streaming and get rid of dangerous "Access Location in Background" permission
+* Autoplay all voice messages in a chat
+* Allow to share location for 24 hours
+* Allow mini-apps to play audio without user interaction
+* Allow to paste and open invitation links from search
+* Mark chats as unread (long tap a chat and select the corresponding option from the three-dot-menu)
+* Add "Mark all as read" option to profile menu in the profile switcher
+* Fix process of upgrading from a very old version of the app
+* Show more recent added stickers at the top of the sticker picker
+* Allow to open links in messages via actions in TalkBack menu
+* Allow to open map if user clicks "Location streaming enabled" system message
+* Allow to disable incoming calls notifications
+* Add an option to process unencrypted messages; by default, only encrypted messages can be sent or received
+* Fix: do not accidentally set draft in chats that don't allow sending messages
+* Fix swipe navigation between tabs in RTL languages
+* Remove "Move to DeltaChat folder", in case you are using the option, a device message shows how to proceed
+* Remove "Only fetch from DeltaChat folder" option, the functionality is preserved for existing profiles
+* Remove "Delete Messages from Server" option, this is now up to the server:
+  Chatmail handles that automatically, classic email servers used as relay often have lots of storage or options themselves
+* Remove "Show Email" options, all messages are shown by default, shared usage of email account is not supported
+* Allow otherwise invalid TLS connections if the key is unchanged
+* Adapt quota warning to automatic cleanup.
+* Don't show non-delivery-notfications in broadcast channels
+* Resend the last 10 messages to new broadcast channel member
+* Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is needed for forward compatibility
+* Improve avatar quality
+* Add new webxdc.isAppSender and webxdc.isBroadcast APIs for mini-apps
+* Fix: avoid invalid empty "~" notifications when some peer is streaming location
+* Fix: Improve detection of stickers
+* Fix text direction issues for RTL languages in "Show full message" view
+* Fix: Reconnect when removing a relay
+* Fix: Location streaming now works correctly with multiple accounts
+* Fix debouncing in chatlist and search
+* Fix sharing contact across profiles
+* Fix: Reset scroll location after switching account
+* Update to core 2.51.0
+
+## v2.49.0
+2026-04
+
+* Fix file sharing to certain apps (e.g. Material Files, etc.)
+* Fix problem with calls when microphone permission is not granted
+* Fix taking pictures and videos in devices with SD cards
+* Fix flipped orientation for some images
+* Fix: avoid empty contact request chats when using invite links in a multi-device setup
+* Remove proxy toggle from profile editing to avoid confusion
+* Updated translations
+* Update to core 2.49.0
+
+## v2.48.0
+2026-03
+
+* Add a warning when editing relays
+* Fix message reordering problems in multi-relay setups
+* Some more bug fixes and updated translations
+* Update to core 2.48.0
+
+## v2.47.0
+2026-03
+
+* Allow to set chat description
+* Unified date display in call bubbles
+* Explain at "Settings / Chats / Outgoing Media Quality" how to send original quality
+* Add a basic sticker picker
+* Leave groups and channels before deletion
+* Further minimize metadata in messages and while getting in contact.
+* Increase resilience of multi-relay usage: if on relay goes down, messages are still received in the others.
+* Allow to hide a relay from contacts instead of removing, allowing smoother relay changes
+* HTML emails: allow to review and copy links before opening them
+* Mark call message as seen when accepting/declining a call
+* Fix: keep original sent timestamp for resent messages
+* Fix: make clicking on broadcast member-added messages work always
+* Fix: remove notification when a message is deleted by sender
+* Fix: avoid "reply privately" not quoting the selected message sometimes
+* Fix: properly hide the calls button
+* Some more bug fixes and updated translations
+* Update to core 2.47.0
+
+## v2.43.0
+2026-02
+
+* Improve switch speed when changing profiles
+* Allow to switch profile when sharing or forwarding
+* Display message views count for channel owners
+* Don't notify notification-to-all from in-chat apps if the chat is muted
+* Allow to see inbox quota for all relays in connectivity screen
+* Truncate file names in the middle, not at the end; important information are more often at the end
+* Remove email address from user profile
+* Mark external links with " ↗" to make them clear
+* Make QR code larger on "Add Second Device" screen
+* Add indication for blocked contacts in user profile
+* Allow to start calls with video disabled
+* Show hint for empty contact search results
+* Add background playing for voice messages and other audio files
+* Allow scanning Invitation Code when creating a new profile
+* Add context menu in long-pressing relays items instead of showing buttons
+* Enhanced video player UI
+* Fix: Show dialog if pasted QR codes are invalid
+* Fix: Refresh chat list when returning from conversation if selected profile changed
+* Fix: Update menu when using "select all" in contact selection
+* Fix: Avoid empty profiles after using "add as second device" from welcome screen
+* Fix: Remove from group deselected members in the contact selection list
+* Fix multi-device seen messages synchronization when using multiple relays
+* Fix mailto handling
+* Fix layout problems inside in-chat apps
+* Fix real-time for in-chat apps that need it
+* Avoid crash when the app is minimized with profile switcher or reactions dialogs open
+* Remove "trash icon" option from contact selection list when adding members to group
+* Update to core 2.43.0
+
+## v2.35.0
+2026-01
+
+* Protect profile deletion and relays management with system lock/pin
+* Fix: Remove address from profile switcher
+* Fix: Avoid crash if the system doesn't allow to start foreground service
+* Remove deprecated "real-time apps" switch
+* Update to core 2.35.0
+
 ## v2.34.0
 2025-12
 

CONTRIBUTING.md

@@ -73,18 +73,15 @@ esp. before/after screenshots.
 
 ### Coding Conventions
 
-Source files are partly derived from different other open source projects
-and may follow different coding styles and conventions.
-
-If you do a PR fixing a bug or adding a feature,
-please embrace the coding convention you see in the corresponding files,
-so that the result fits well together.
-
-Do not refactor or rename things in the same PR
-to make the diff small and the PR easy to review.
-
 Project language is Java.
 
+Code formatting is enforced via [Spotless](https://github.com/diffplug/spotless) Gradle plugin.
+Auto-format all files by running `./gradlew spotlessApply` before opening a PR.
+CI will fail if files are not formatted correctly so make sure to run the formatter before pushing.
+
+If you do a PR fixing a bug or adding a feature, do not refactor or rename things in the same PR
+to make the diff small and the PR easy to review.
+
 By using [Delta Chat Core](https://github.com/deltachat/deltachat-core-rust)
 there is already a strong separation between "UI" and "Model".
 Further separations and abstraction layers are often not helpful

build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'com.android.application' version '8.11.1'
     id 'com.google.gms.google-services' version '4.4.1'
+    id 'com.diffplug.spotless' version '8.3.0'
 }
 
 repositories {
@@ -33,8 +34,8 @@ android {
     useLibrary 'org.apache.http.legacy'
 
     defaultConfig {
-        versionCode 30000735
-        versionName "2.34.0"
+        versionCode 30000746
+        versionName "2.53.0"
 
         applicationId "chat.delta.lite"
         multiDexEnabled true
@@ -72,10 +73,20 @@ android {
     packagingOptions {
         jniLibs {
             doNotStrip '**/*.so'
-            keepDebugSymbols += ['*/mips/*.so', '*/mips64/*.so']
+            keepDebugSymbols += [
+                '*/mips/*.so',
+                '*/mips64/*.so'
+            ]
         }
         resources {
-            excludes += ['LICENSE.txt', 'LICENSE', 'NOTICE', 'asm-license.txt', 'META-INF/LICENSE', 'META-INF/NOTICE']
+            excludes += [
+                'LICENSE.txt',
+                'LICENSE',
+                'NOTICE',
+                'asm-license.txt',
+                'META-INF/LICENSE',
+                'META-INF/NOTICE'
+            ]
         }
     }
 
@@ -154,14 +165,14 @@ android {
     }
 
     if(!project.hasProperty("ABI_FILTER")) {
-      splits {
-        abi {
-            enable true
-            reset()
-            include "armeabi-v7a", "arm64-v8a", "x86", "x86_64"
-            universalApk true
+        splits {
+            abi {
+                enable true
+                reset()
+                include "armeabi-v7a", "arm64-v8a", "x86", "x86_64"
+                universalApk true
+            }
         }
-      }
     }
 
     project.ext.versionCodes = ['armeabi-v7a': 1, 'arm64-v8a': 2, 'x86': 3, 'x86_64': 4]
@@ -169,16 +180,16 @@ android {
     android.applicationVariants.all { variant ->
         variant.outputs.all { output ->
             output.outputFileName = output.outputFileName
-                .replace("android", "ArcaneChat")
-                .replace("-release", "")
-                .replace(".apk", "-${variant.versionName}.apk")
+                    .replace("android", "ArcaneChat")
+                    .replace("-release", "")
+                    .replace(".apk", "-${variant.versionName}.apk")
             if(project.hasProperty("ABI_FILTER")) {
-              output.versionCodeOverride =
-                variant.versionCode * 10 + project.ext.versionCodes.get(ABI_FILTER)
+                output.versionCodeOverride =
+                        variant.versionCode * 10 + project.ext.versionCodes.get(ABI_FILTER)
             } else {
-              output.versionCodeOverride =
-                variant.versionCode * 10 + project.ext.versionCodes.get(output.getFilter(com.android.build.OutputFile.ABI), 4)
-           }
+                output.versionCodeOverride =
+                        variant.versionCode * 10 + project.ext.versionCodes.get(output.getFilter(com.android.build.OutputFile.ABI), 4)
+            }
         }
     }
 
@@ -199,7 +210,31 @@ android {
         renderScript true
         aidl true
     }
+}
 
+spotless {
+    java {
+        target 'src/*/java/**/*.java'
+        targetExclude 'src/main/java/chat/delta/**' // ignore auto-generated code
+        googleJavaFormat()  // Google style = 2-space indent, matches Android Studio defaults
+        removeUnusedImports()
+        trimTrailingWhitespace()
+        endWithNewline()
+    }
+    format 'xml', {
+        target 'src/*/res/**/*.xml', 'src/*/AndroidManifest.xml'
+        targetExclude 'src/*/res/values*/strings*.xml' // line-break changes invalidate translations
+        eclipseWtp('xml').configFile('spotless/eclipse-wtp-xml.prefs')
+        trimTrailingWhitespace()
+        endWithNewline()
+    }
+    groovyGradle {
+        target '*.gradle'
+        greclipse()
+        leadingTabsToSpaces(4)
+        trimTrailingWhitespace()
+        endWithNewline()
+    }
 }
 
 final def  markwon_version =  '4.6.2'
@@ -211,7 +246,14 @@ dependencies {
     implementation "io.noties.markwon:inline-parser:$markwon_version"
     implementation 'com.airbnb.android:lottie:4.2.2' // Lottie animations support.
 
+    def media3_version = "1.8.0"   // 1.9.0 need minSdkVersion 23
+
     implementation 'androidx.concurrent:concurrent-futures:1.3.0'
+    implementation 'androidx.core:core:1.17.0'
+    implementation 'androidx.core:core-telecom:1.0.1'
+    implementation 'im.conversations.webrtc:webrtc-android:129.0.0'
+    // For Kotlin->Java interpolation
+    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.9.4'
     implementation 'androidx.sharetarget:sharetarget:1.2.0'
     implementation 'androidx.webkit:webkit:1.14.0'
     implementation 'androidx.multidex:multidex:2.0.1'
@@ -231,8 +273,11 @@ dependencies {
     implementation 'androidx.work:work-runtime:2.9.1'
     implementation 'androidx.emoji2:emoji2-emojipicker:1.5.0'
     implementation 'com.google.guava:guava:31.1-android'
-    implementation 'com.google.android.exoplayer:exoplayer-core:2.19.1' // plays video and audio
+    implementation 'com.google.android.exoplayer:exoplayer-core:2.19.1' // FIXME: exoplayer dependencies kept for Video, but we shall migrate them at some point
     implementation 'com.google.android.exoplayer:exoplayer-ui:2.19.1'
+    implementation "androidx.media3:media3-exoplayer:$media3_version"
+    implementation "androidx.media3:media3-session:$media3_version"
+    implementation "androidx.media3:media3-ui:$media3_version"
     implementation 'androidx.constraintlayout:constraintlayout:2.2.0'
     implementation 'com.google.zxing:core:3.3.0' // fixed version to support SDK<24
     implementation ('com.journeyapps:zxing-android-embedded:4.3.0') { transitive = false } // QR Code scanner
@@ -246,7 +291,8 @@ dependencies {
     implementation 'com.github.amulyakhare:TextDrawable:558677ea31'  // number of unread messages,
     // the one-letter circle for the contacts (when there is not avatar) and a white background.
     implementation 'com.googlecode.mp4parser:isoparser:1.0.6' // MP4 recoding; upgrading eg. to 1.1.22 breaks recoding, however, i have not investigated further, just reset to 1.0.6
-    implementation ('com.davemorrissey.labs:subsampling-scale-image-view:3.10.0') { // for the zooming on photos / media
+    implementation ('com.davemorrissey.labs:subsampling-scale-image-view:3.10.0') {
+        // for the zooming on photos / media
         exclude group: 'com.android.support', module: 'support-annotations'
     }
 
@@ -255,11 +301,13 @@ dependencies {
     // <https://github.com/cketti/SafeContentResolver>
     implementation 'de.cketti.safecontentresolver:safe-content-resolver-v21:1.0.0'
 
-    gplayImplementation('com.google.firebase:firebase-messaging:24.1.2') { // for PUSH notifications, don't upgrade: v25.0.0 requires minSdk>=23
+    gplayImplementation('com.google.firebase:firebase-messaging:24.1.2') {
+        // for PUSH notifications, don't upgrade: v25.0.0 requires minSdk>=23
         exclude group: 'com.google.firebase', module: 'firebase-core'
         exclude group: 'com.google.firebase', module: 'firebase-analytics'
         exclude group: 'com.google.firebase', module: 'firebase-measurement-connector'
     }
+    gplayImplementation 'com.google.android.gms:play-services-location:21.3.0'
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.assertj:assertj-core:3.27.3'

fastlane/metadata/android/en-US/full_description.txt

@@ -1,6 +1,8 @@
 ArcaneChat is a decentralized and secure instant messenger that is easy to use for friends and family.
 
-• Anonymous. Instant onboarding without a phone number, e-mail or other private data.
+• Private. Instant on-boarding without a phone number or other private data.
+
+• Friends & Family: Only chat with people you know. Unknown users cannot message or follow you without mutual consent.
 
 • Flexible. Supports multiple chat profiles and is easy to setup on multiple devices.
 
@@ -23,7 +25,7 @@ ArcaneChat is a Delta Chat client and was created with a focus on usability, goo
 <li>Multiple color themes/skins</li>
 <li>It is possible to disable profiles to completely disconnect them saving data/bandwidth</li>
 <li>You can easily see the connection status of all your profiles in the profile switcher</li>
-<li>Extra option to share location for 12 hours</li>
+<li>Extra option to share location for 24 hours</li>
 <li>Clicking on a message with a POI location, will open the POI on the map</li>
 <li>Last-seen status of contacts is shown in your contact list, like in WhatsApp, Telegram, etc.</li>
 <li>Videos are played in loop, useful for short GIF videos</li>

flake.lock

@@ -7,11 +7,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1756239746,
-        "narHash": "sha256-0ibN685tT+u/Nbmbrrq9G3mRUzct2Votyv/a7Wwv26s=",
+        "lastModified": 1775939535,
+        "narHash": "sha256-Zq1U7Vhw5ctvhJQy+3ShqIv7Mplf3XkgJY+QJnhfUGQ=",
         "owner": "tadfisher",
         "repo": "android-nixpkgs",
-        "rev": "256631d162ec883b2341ee59621516e1f65f0f6b",
+        "rev": "d2e16192309bf3101e4998ffa62e914819dee077",
         "type": "github"
       },
       "original": {
@@ -28,11 +28,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1741473158,
-        "narHash": "sha256-kWNaq6wQUbUMlPgw8Y+9/9wP0F8SHkjy24/mN3UAppg=",
+        "lastModified": 1768818222,
+        "narHash": "sha256-460jc0+CZfyaO8+w8JNtlClB2n4ui1RbHfPTLkpwhU8=",
         "owner": "numtide",
         "repo": "devshell",
-        "rev": "7c9e793ebe66bcba8292989a68c0419b737a22a0",
+        "rev": "255a2b1725a20d060f566e4755dbf571bbbb5f76",
         "type": "github"
       },
       "original": {
@@ -79,11 +79,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1756125398,
-        "narHash": "sha256-XexyKZpf46cMiO5Vbj+dWSAXOnr285GHsMch8FBoHbc=",
+        "lastModified": 1775710090,
+        "narHash": "sha256-ar3rofg+awPB8QXDaFJhJ2jJhu+KqN/PRCXeyuXR76E=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3b9f00d7a7bf68acd4c4abb9d43695afb04e03a5",
+        "rev": "4c1018dae018162ec878d42fec712642d214fdfa",
         "type": "github"
       },
       "original": {
@@ -95,11 +95,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1756159630,
-        "narHash": "sha256-ohMvsjtSVdT/bruXf5ClBh8ZYXRmD4krmjKrXhEvwMg=",
+        "lastModified": 1775823930,
+        "narHash": "sha256-ALT447J7FcxP/97J01A/gp/hgdO5lXRsm+zLMt+gIjc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "84c256e42600cb0fdf25763b48d28df2f25a0c8b",
+        "rev": "8c11f88bb9573a10a7d6bf87161ef08455ac70b9",
         "type": "github"
       },
       "original": {
@@ -138,11 +138,11 @@
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1763347184,
-        "narHash": "sha256-6QH8hpCYJxifvyHEYg+Da0BotUn03BwLIvYo3JAxuqQ=",
+        "lastModified": 1775877051,
+        "narHash": "sha256-wpSQm2PD/w4uRo2wb8utk0b5hOBkkg/CZ1xICY+qB7M=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "08895cce80433978d5bfd668efa41c5e24578cbd",
+        "rev": "08b4f3633471874c8894632ade1b78d75dbda002",
         "type": "github"
       },
       "original": {

flake.nix

@@ -35,6 +35,7 @@
           buildInputs = [
             android-sdk
             pkgs.openjdk17
+            pkgs.perl
             (pkgs.buildPackages.rust-bin.stable."${rust-version}".minimal.override {
               targets = [
                 "armv7-linux-androideabi"

jni/dc_wrapper.c

@@ -153,6 +153,42 @@ static uint32_t* jintArray2uint32Pointer(JNIEnv* env, jintArray ja, int* ret_icn
 }
 
 
+/************************************************************
+ * DcEventChannel
+ ************************************************************/
+
+static dc_event_channel_t* get_dc_event_channel(JNIEnv *env, jobject obj)
+{
+    static jfieldID fid = 0;
+    if (fid==0) {
+        jclass cls = (*env)->GetObjectClass(env, obj);
+        fid = (*env)->GetFieldID(env, cls, "eventChannelCPtr", "J" /*Signature, J=long*/);
+    }
+    if (fid) {
+        return (dc_event_channel_t*)(*env)->GetLongField(env, obj, fid);
+    }
+    return NULL;
+}
+
+
+JNIEXPORT jlong Java_com_b44t_messenger_DcEventChannel_createEventChannelCPtr(JNIEnv *env, jobject obj)
+{
+    return (jlong)dc_event_channel_new();
+}
+
+
+JNIEXPORT void Java_com_b44t_messenger_DcEventChannel_unrefEventChannelCPtr(JNIEnv *env, jobject obj)
+{
+    dc_event_channel_unref(get_dc_event_channel(env, obj));
+}
+
+
+JNIEXPORT jlong Java_com_b44t_messenger_DcEventChannel_getEventEmitterCPtr(JNIEnv *env, jobject obj)
+{
+    return (jlong)dc_event_channel_get_event_emitter(get_dc_event_channel(env, obj));
+}
+
+
 /*******************************************************************************
  * DcAccounts
  ******************************************************************************/
@@ -172,11 +208,11 @@ static dc_accounts_t* get_dc_accounts(JNIEnv *env, jobject obj)
 }
 
 
-JNIEXPORT jlong Java_com_b44t_messenger_DcAccounts_createAccountsCPtr(JNIEnv *env, jobject obj, jstring dir)
+JNIEXPORT jlong Java_com_b44t_messenger_DcAccounts_createAccountsCPtr(JNIEnv *env, jobject obj, jstring dir, jobject chanObj)
 {
     CHAR_REF(dir);
         int writable = 1;
-        jlong accountsCPtr = (jlong)dc_accounts_new(dirPtr, writable);
+        jlong accountsCPtr = (jlong)dc_accounts_new_with_event_channel(dirPtr, writable, get_dc_event_channel(env, chanObj));
     CHAR_UNREF(dir);
     return accountsCPtr;
 }
@@ -910,18 +946,6 @@ JNIEXPORT jstring Java_com_b44t_messenger_DcContext_getContactEncrInfo(JNIEnv *e
 }
 
 
-JNIEXPORT jstring Java_com_b44t_messenger_DcContext_initiateKeyTransfer(JNIEnv *env, jobject obj)
-{
-    jstring setup_code = NULL;
-    char* temp = dc_initiate_key_transfer(get_dc_context(env, obj));
-    if (temp) {
-        setup_code = JSTRING_NEW(temp);
-        dc_str_unref(temp);
-    }
-    return setup_code;
-}
-
-
 JNIEXPORT void Java_com_b44t_messenger_DcContext_imex(JNIEnv *env, jobject obj, jint what, jstring dir)
 {
     CHAR_REF(dir);
@@ -1369,6 +1393,7 @@ JNIEXPORT jint Java_com_b44t_messenger_DcMsg_getId(JNIEnv *env, jobject obj)
     return dc_msg_get_id(get_dc_msg(env, obj));
 }
 
+
 JNIEXPORT jstring Java_com_b44t_messenger_DcMsg_getText(JNIEnv *env, jobject obj)
 {
     char* temp = dc_msg_get_text(get_dc_msg(env, obj));
@@ -1594,15 +1619,6 @@ JNIEXPORT jboolean Java_com_b44t_messenger_DcMsg_hasHtml(JNIEnv *env, jobject ob
 }
 
 
-JNIEXPORT jstring Java_com_b44t_messenger_DcMsg_getSetupCodeBegin(JNIEnv *env, jobject obj)
-{
-    char* temp = dc_msg_get_setupcodebegin(get_dc_msg(env, obj));
-        jstring ret =  JSTRING_NEW(temp);
-    dc_str_unref(temp);
-    return ret;
-}
-
-
 JNIEXPORT void Java_com_b44t_messenger_DcMsg_setSubject(JNIEnv *env, jobject obj, jstring text)
 {
     CHAR_REF(text);
@@ -1627,12 +1643,6 @@ JNIEXPORT void Java_com_b44t_messenger_DcMsg_setHtml(JNIEnv *env, jobject obj, j
 }
 
 
-JNIEXPORT void Java_com_b44t_messenger_DcMsg_forceSticker(JNIEnv *env, jobject obj)
-{
-    dc_msg_force_sticker(get_dc_msg(env, obj));
-}
-
-
 JNIEXPORT jstring Java_com_b44t_messenger_DcMsg_getPOILocation(JNIEnv *env, jobject obj)
 {
     char* temp = dc_msg_get_poi_location(get_dc_msg(env, obj));
@@ -1957,7 +1967,7 @@ JNIEXPORT jstring Java_com_b44t_messenger_DcBackupProvider_getQr(JNIEnv *env, jo
 
 JNIEXPORT jstring Java_com_b44t_messenger_DcBackupProvider_getQrSvg(JNIEnv *env, jobject obj)
 {
-    char* temp = dc_backup_provider_get_qr_svg(get_dc_backup_provider(env, obj));
+    char* temp = dc_create_qr_svg(dc_backup_provider_get_qr(get_dc_backup_provider(env, obj)));
         jstring ret = JSTRING_NEW(temp);
     dc_str_unref(temp);
     return ret;

proguard-rules.pro

@@ -13,3 +13,8 @@
 -keep class org.thoughtcrime.securesms.crypto.KeyStoreHelper* { *; }
 
 -dontwarn com.google.firebase.analytics.connector.AnalyticsConnector
+
+# Keep WebRTC classes
+-keep class org.webrtc.** { *; }
+-keepclassmembers class org.webrtc.** { *; }
+-keepattributes InnerClasses

scripts/rebrand.sh

@@ -6,3 +6,4 @@ find ./src/main/assets/help/ -type f -name '*.html' | xargs sed -i 's/Delta Chat
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/get.delta.chat/github.com\/ArcaneChat/g'
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/delta.chat\/donate/arcanechat.me\/#contribute/g'
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/Delta Chat/ArcaneChat/g'
+find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/❤️/💜/g'

scripts/undo_rebrand.sh

@@ -6,6 +6,7 @@ find ./src/main/assets/help/ -type f -name '*.html' | xargs sed -i 's/ArcaneChat
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/github.com\/ArcaneChat/get.delta.chat/g'
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/arcanechat.me\/#contribute/delta.chat\/donate/g'
 find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/ArcaneChat/Delta Chat/g'
+find ./src/ -type f -name 'strings.xml' | xargs sed -i 's/💜/❤️/g'
 
 # don't revert the app name
 sed -i 's/>Delta Chat</>ArcaneChat</g' ./src/main/res/values/strings.xml

scripts/update-rpc-bindings.sh

@@ -9,3 +9,4 @@ cd "$ROOT_DIR"
 
 # generate code
 dcrpcgen java --schema schema.json -o ./src/main/java/
+rm schema.json

scripts/upload-release.sh

@@ -34,6 +34,7 @@ cd ../..
 SYMBOLS_ZIP="$APK-symbols.zip"
 rm $SYMBOLS_ZIP
 zip -r $SYMBOLS_ZIP obj
+zip $SYMBOLS_ZIP build/outputs/mapping/gplayRelease/mapping.txt
 ls -l $SYMBOLS_ZIP
 rsync --progress $SYMBOLS_ZIP jekyll@download.delta.chat:/var/www/html/download/android/symbols/
 

settings.gradle

@@ -1,5 +1,6 @@
 pluginManagement {
     repositories {
+        gradlePluginPortal()
         google()
         mavenCentral()
     }

spotless/eclipse-wtp-xml.prefs

@@ -0,0 +1,7 @@
+eclipse.preferences.version=1
+lineWidth=100
+splitMultiAttrs=true
+indentMultipleAttributes=true
+indentationChar=space
+indentationSize=4
+spaceBeforeEmptyCloseTag=true

src/androidTest/java/com/b44t/messenger/TestUtils.java

@@ -11,7 +11,6 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.view.View;
-
 import androidx.annotation.NonNull;
 import androidx.test.espresso.NoMatchingViewException;
 import androidx.test.espresso.UiController;
@@ -19,7 +18,6 @@ import androidx.test.espresso.ViewAction;
 import androidx.test.espresso.ViewInteraction;
 import androidx.test.espresso.util.TreeIterables;
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
-
 import org.hamcrest.Matcher;
 import org.thoughtcrime.securesms.ConversationListActivity;
 import org.thoughtcrime.securesms.R;
@@ -60,10 +58,12 @@ public class TestUtils {
   }
 
   @NonNull
-  public static ActivityScenarioRule<ConversationListActivity> getOfflineActivityRule(boolean useExistingChats) {
+  public static ActivityScenarioRule<ConversationListActivity> getOfflineActivityRule(
+      boolean useExistingChats) {
     Intent intent =
-            Intent.makeMainActivity(
-                    new ComponentName(getInstrumentation().getTargetContext(), ConversationListActivity.class));
+        Intent.makeMainActivity(
+            new ComponentName(
+                getInstrumentation().getTargetContext(), ConversationListActivity.class));
     if (!useExistingChats) {
       createOfflineAccount();
     }
@@ -72,18 +72,22 @@ public class TestUtils {
   }
 
   @NonNull
-  public static <T extends Activity> ActivityScenarioRule<T> getOnlineActivityRule(Class<T> activityClass) {
+  public static <T extends Activity> ActivityScenarioRule<T> getOnlineActivityRule(
+      Class<T> activityClass) {
     Context context = getInstrumentation().getTargetContext();
     AccountManager.getInstance().beginAccountCreation(context);
     prepare();
-    return new ActivityScenarioRule<>(new Intent(getInstrumentation().getTargetContext(), activityClass));
+    return new ActivityScenarioRule<>(
+        new Intent(getInstrumentation().getTargetContext(), activityClass));
   }
 
   private static void prepare() {
-    Prefs.setBooleanPreference(getInstrumentation().getTargetContext(), Prefs.DOZE_ASKED_DIRECTLY, true);
+    Prefs.setBooleanPreference(
+        getInstrumentation().getTargetContext(), Prefs.DOZE_ASKED_DIRECTLY, true);
     if (!AccessibilityUtil.areAnimationsDisabled(getInstrumentation().getTargetContext())) {
-      throw new RuntimeException("To run the tests, disable animations at Developer options' " +
-              "-> 'Window/Transition/Animator animation scale' -> Set all 3 to 'off'");
+      throw new RuntimeException(
+          "To run the tests, disable animations at Developer options' "
+              + "-> 'Window/Transition/Animator animation scale' -> Set all 3 to 'off'");
     }
   }
 
@@ -116,26 +120,22 @@ public class TestUtils {
         }
 
         throw new NoMatchingViewException.Builder()
-                .withRootView(view)
-                .withViewMatcher(matcher)
-                .build();
+            .withRootView(view)
+            .withViewMatcher(matcher)
+            .build();
       }
     };
   }
 
   /**
-   * Perform action of implicitly waiting for a certain view.
-   * This differs from EspressoExtensions.searchFor in that,
-   * upon failure to locate an element, it will fetch a new root view
-   * in which to traverse searching for our @param match
+   * Perform action of implicitly waiting for a certain view. This differs from
+   * EspressoExtensions.searchFor in that, upon failure to locate an element, it will fetch a new
+   * root view in which to traverse searching for our @param match
    *
    * @param viewMatcher ViewMatcher used to find our view
    */
   public static ViewInteraction waitForView(
-          Matcher<View> viewMatcher,
-          int waitMillis,
-          int waitMillisPerTry
-  ) {
+      Matcher<View> viewMatcher, int waitMillis, int waitMillisPerTry) {
 
     // Derive the max tries
     int maxTries = (int) (waitMillis / waitMillisPerTry);
@@ -164,12 +164,11 @@ public class TestUtils {
   }
 
   /**
-   * Normally, you would do
-   * onView(withId(R.id.send_button)).perform(click());
-   * to send the draft message. However, in order to change the send button to the attach button
-   * while there is no draft, the send button is made invisible and the attach button is made
-   * visible instead. This confuses the test framework.<br/><br/>
-   *
+   * Normally, you would do onView(withId(R.id.send_button)).perform(click()); to send the draft
+   * message. However, in order to change the send button to the attach button while there is no
+   * draft, the send button is made invisible and the attach button is made visible instead. This
+   * confuses the test framework.<br>
+   * <br>
    * So, this is a workaround for pressing the send button.
    */
   public static void pressSend() {

src/androidTest/java/com/b44t/messenger/uibenchmarks/EnterChatsBenchmark.java

@@ -10,14 +10,11 @@ import static androidx.test.espresso.matcher.ViewMatchers.withId;
 import static androidx.test.espresso.matcher.ViewMatchers.withText;
 
 import android.util.Log;
-
 import androidx.test.espresso.contrib.RecyclerViewActions;
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
-
 import com.b44t.messenger.TestUtils;
-
 import org.junit.After;
 import org.junit.Ignore;
 import org.junit.Rule;
@@ -34,18 +31,19 @@ public class EnterChatsBenchmark {
   // ==============================================================================================
   // Set this to true if you already have at least 10 chats on your existing DeltaChat installation
   // and want to traverse through them instead of 10 newly created chats
-  private final static boolean USE_EXISTING_CHATS = false;
+  private static final boolean USE_EXISTING_CHATS = false;
   // ==============================================================================================
-  private final static int GO_THROUGH_ALL_CHATS_N_TIMES = 8;
+  private static final int GO_THROUGH_ALL_CHATS_N_TIMES = 8;
 
   // ==============================================================================================
   // PLEASE BACKUP YOUR ACCOUNT BEFORE RUNNING THIS!
   // ==============================================================================================
 
-  private final static String TAG = EnterChatsBenchmark.class.getSimpleName();
+  private static final String TAG = "EnterChatsBenchmark";
 
   @Rule
-  public ActivityScenarioRule<ConversationListActivity> activityRule = TestUtils.getOfflineActivityRule(USE_EXISTING_CHATS);
+  public ActivityScenarioRule<ConversationListActivity> activityRule =
+      TestUtils.getOfflineActivityRule(USE_EXISTING_CHATS);
 
   @Test
   public void createAndEnter10FilledChats() {
@@ -55,7 +53,9 @@ public class EnterChatsBenchmark {
     for (int i = 0; i < GO_THROUGH_ALL_CHATS_N_TIMES; i++) {
       times[i] = "" + timeGoToNChats(10); // 10 group chats were created
     }
-    Log.i(TAG, "MEASURED RESULTS (Benchmark) - Going thorough all 10 chats: " + String.join(",", times));
+    Log.i(
+        TAG,
+        "MEASURED RESULTS (Benchmark) - Going thorough all 10 chats: " + String.join(",", times));
   }
 
   @Test
@@ -66,13 +66,17 @@ public class EnterChatsBenchmark {
     for (int i = 0; i < GO_THROUGH_ALL_CHATS_N_TIMES; i++) {
       times[i] = "" + timeGoToNChats(1);
     }
-    Log.i(TAG, "MEASURED RESULTS (Benchmark) - Entering and leaving 1 empty chat: " + String.join(",", times));
+    Log.i(
+        TAG,
+        "MEASURED RESULTS (Benchmark) - Entering and leaving 1 empty chat: "
+            + String.join(",", times));
   }
 
   @Test
   public void enterFilledChat() {
     if (!USE_EXISTING_CHATS) {
-      createChatAndGoBack("Group #1", true, "Hello!", "Some links: https://testrun.org", "And a command: /help");
+      createChatAndGoBack(
+          "Group #1", true, "Hello!", "Some links: https://testrun.org", "And a command: /help");
     }
 
     String[] times = new String[50];
@@ -82,7 +86,18 @@ public class EnterChatsBenchmark {
       long end = System.currentTimeMillis();
       long diff = end - start;
       pressBack();
-      Log.i(TAG, "Measured (Benchmark) " + (i+1) + "/" + times.length + ": Entering 1 filled chat took " + diff + "ms " + "(going back took " + (System.currentTimeMillis() - end) + "ms)");
+      Log.i(
+          TAG,
+          "Measured (Benchmark) "
+              + (i + 1)
+              + "/"
+              + times.length
+              + ": Entering 1 filled chat took "
+              + diff
+              + "ms "
+              + "(going back took "
+              + (System.currentTimeMillis() - end)
+              + "ms)");
 
       times[i] = "" + diff;
     }
@@ -91,16 +106,37 @@ public class EnterChatsBenchmark {
 
   private void create10Chats(boolean fillWithMsgs) {
     if (!USE_EXISTING_CHATS) {
-      createChatAndGoBack("Group #1", fillWithMsgs, "Hello!", "Some links: https://testrun.org", "And a command: /help");
-      createChatAndGoBack("Group #2", fillWithMsgs, "example.org, alice@example.org", "aaaaaaa", "bbbbbb");
-      createChatAndGoBack("Group #3", fillWithMsgs, repeat("Some string ", 600), repeat("Another string", 200), "Hi!!!");
+      createChatAndGoBack(
+          "Group #1",
+          fillWithMsgs,
+          "Hello!",
+          "Some links: https://testrun.org",
+          "And a command: /help");
+      createChatAndGoBack(
+          "Group #2", fillWithMsgs, "example.org, alice@example.org", "aaaaaaa", "bbbbbb");
+      createChatAndGoBack(
+          "Group #3",
+          fillWithMsgs,
+          repeat("Some string ", 600),
+          repeat("Another string", 200),
+          "Hi!!!");
       createChatAndGoBack("Group #4", fillWithMsgs, "xyzabc", "Hi!!!!", "Let's meet!");
-      createChatAndGoBack("Group #5", fillWithMsgs, repeat("aaaa", 40), "bbbbbbbbbbbbbbbbbb", "ccccccccccccccc");
-      createChatAndGoBack("Group #6", fillWithMsgs, "aaaaaaaaaaa", repeat("Hi! ", 1000), "bbbbbbbbbb");
-      createChatAndGoBack("Group #7", fillWithMsgs, repeat("abcdefg ", 500), repeat("xxxxx", 100), "yrrrrrrrrrrrrr");
-      createChatAndGoBack("Group #8", fillWithMsgs, "and a number: 037362/384756", "ccccc", "Nice!");
-      createChatAndGoBack("Group #9", fillWithMsgs, "ddddddddddddddddd", "zuuuuuuuuuuuuuuuu", "ccccc");
-      createChatAndGoBack("Group #10", fillWithMsgs, repeat("xxxxxxyyyyy", 100), repeat("String!!", 10), "abcd");
+      createChatAndGoBack(
+          "Group #5", fillWithMsgs, repeat("aaaa", 40), "bbbbbbbbbbbbbbbbbb", "ccccccccccccccc");
+      createChatAndGoBack(
+          "Group #6", fillWithMsgs, "aaaaaaaaaaa", repeat("Hi! ", 1000), "bbbbbbbbbb");
+      createChatAndGoBack(
+          "Group #7",
+          fillWithMsgs,
+          repeat("abcdefg ", 500),
+          repeat("xxxxx", 100),
+          "yrrrrrrrrrrrrr");
+      createChatAndGoBack(
+          "Group #8", fillWithMsgs, "and a number: 037362/384756", "ccccc", "Nice!");
+      createChatAndGoBack(
+          "Group #9", fillWithMsgs, "ddddddddddddddddd", "zuuuuuuuuuuuuuuuu", "ccccc");
+      createChatAndGoBack(
+          "Group #10", fillWithMsgs, repeat("xxxxxxyyyyy", 100), repeat("String!!", 10), "abcd");
     }
   }
 
@@ -130,10 +166,10 @@ public class EnterChatsBenchmark {
     onView(withContentDescription(R.string.group_create_button)).perform(click());
 
     if (fillWithMsgs) {
-      for (String t: texts) {
+      for (String t : texts) {
         sendText(t);
       }
-      for (String t: texts) {
+      for (String t : texts) {
         sendText(t);
       }
     }

src/androidTest/java/com/b44t/messenger/uitests/offline/ForwardingTest.java

@@ -14,11 +14,10 @@ import androidx.test.espresso.contrib.RecyclerViewActions;
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
-
 import com.b44t.messenger.DcContact;
 import com.b44t.messenger.DcContext;
 import com.b44t.messenger.TestUtils;
-
+import java.util.concurrent.TimeUnit;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -29,8 +28,6 @@ import org.thoughtcrime.securesms.ConversationListActivity;
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.connect.DcHelper;
 
-import java.util.concurrent.TimeUnit;
-
 @RunWith(AndroidJUnit4.class)
 @LargeTest
 public class ForwardingTest {
@@ -43,7 +40,8 @@ public class ForwardingTest {
   }
 
   @Rule
-  public final ActivityScenarioRule<ConversationListActivity> activityRule = TestUtils.getOfflineActivityRule(false);
+  public final ActivityScenarioRule<ConversationListActivity> activityRule =
+      TestUtils.getOfflineActivityRule(false);
 
   @Before
   public void createChats() {
@@ -51,10 +49,13 @@ public class ForwardingTest {
     dcContext.createChatByContactId(DcContact.DC_CONTACT_ID_SELF);
     // Disable bcc_self so that DC doesn't try to send messages to the server.
     // If we didn't do this, messages would stay in DC_STATE_OUT_PENDING forever.
-    // The thing is, DC_STATE_OUT_PENDING show a rotating circle animation, and Espresso doesn't work
+    // The thing is, DC_STATE_OUT_PENDING show a rotating circle animation, and Espresso doesn't
+    // work
     // with animations, and the tests would hang and never finish.
     dcContext.setConfig("bcc_self", "0");
-    activityRule.getScenario().onActivity(a -> createdGroupId = DcHelper.getContext(a).createGroupChat( "group"));
+    activityRule
+        .getScenario()
+        .onActivity(a -> createdGroupId = DcHelper.getContext(a).createGroupChat("group"));
   }
 
   @After
@@ -68,7 +69,8 @@ public class ForwardingTest {
     // The group is at position 0, self chat is at position 1, device talk is at position 2
     onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(2, click()));
     onView(withId(R.id.title)).check(matches(withText(R.string.device_talk)));
-    onView(withId(android.R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(0, longClick()));
+    onView(withId(android.R.id.list))
+        .perform(RecyclerViewActions.actionOnItemAtPosition(0, longClick()));
     onView(withId(R.id.menu_context_forward)).perform(click());
     // Send it to self chat (which is sorted to the top because we're forwarding)
     onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
@@ -77,11 +79,13 @@ public class ForwardingTest {
 
     pressBack();
 
-    onView(withId(R.id.toolbar_title)).check(matches(withText(R.string.connectivity_not_connected)));
+    onView(withId(R.id.toolbar_title))
+        .check(matches(withText(R.string.connectivity_not_connected)));
     // Self chat moved up because we sent a message there
     onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
     onView(withId(R.id.title)).check(matches(withText(R.string.saved_messages)));
-    onView(withId(android.R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(0, longClick()));
+    onView(withId(android.R.id.list))
+        .perform(RecyclerViewActions.actionOnItemAtPosition(0, longClick()));
     onView(withId(R.id.menu_context_forward)).perform(click());
     // Send it to the group
     onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(1, click()));
@@ -89,6 +93,7 @@ public class ForwardingTest {
     onView(withId(R.id.title)).check(matches(withText("group")));
 
     pressBack();
-    onView(withId(R.id.toolbar_title)).check(matches(withText(R.string.connectivity_not_connected)));
+    onView(withId(R.id.toolbar_title))
+        .check(matches(withText(R.string.connectivity_not_connected)));
   }
 }

src/androidTest/java/com/b44t/messenger/uitests/offline/SharingTest.java

@@ -14,15 +14,13 @@ import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentat
 import android.content.ComponentName;
 import android.content.Intent;
 import android.net.Uri;
-
 import androidx.test.espresso.contrib.RecyclerViewActions;
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
-
 import com.b44t.messenger.DcContext;
 import com.b44t.messenger.TestUtils;
-
+import java.io.File;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
@@ -34,9 +32,6 @@ import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.ShareActivity;
 import org.thoughtcrime.securesms.connect.DcHelper;
 
-import java.io.File;
-
-
 @RunWith(AndroidJUnit4.class)
 @LargeTest
 public class SharingTest {
@@ -48,26 +43,34 @@ public class SharingTest {
   private static int createdSingleChatId;
 
   @Rule
-  public final ActivityScenarioRule<ConversationListActivity> activityRule = TestUtils.getOfflineActivityRule(false);
+  public final ActivityScenarioRule<ConversationListActivity> activityRule =
+      TestUtils.getOfflineActivityRule(false);
 
   @Before
   public void createGroup() {
-    activityRule.getScenario().onActivity(a -> createdGroupId = DcHelper.getContext(a).createGroupChat( "group"));
+    activityRule
+        .getScenario()
+        .onActivity(a -> createdGroupId = DcHelper.getContext(a).createGroupChat("group"));
   }
 
   @Before
   public void createSingleChat() {
-    activityRule.getScenario().onActivity(a -> {
-      int contactId = DcHelper.getContext(a).createContact("", "abc@example.org");
-      createdSingleChatId = DcHelper.getContext(a).createChatByContactId(contactId);
-    });
+    activityRule
+        .getScenario()
+        .onActivity(
+            a -> {
+              int contactId = DcHelper.getContext(a).createContact("", "abc@example.org");
+              createdSingleChatId = DcHelper.getContext(a).createChatByContactId(contactId);
+            });
   }
 
   @Test
   public void testNormalSharing() {
     Intent i = new Intent(Intent.ACTION_SEND);
     i.putExtra(Intent.EXTRA_TEXT, "Hello!");
-    i.setComponent(new ComponentName(getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
+    i.setComponent(
+        new ComponentName(
+            getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
     activityRule.getScenario().onActivity(a -> a.startActivity(i));
 
     onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
@@ -77,9 +80,9 @@ public class SharingTest {
   }
 
   /**
-   * Test direct sharing from a screenshot.
-   * Also, this is the regression test for https://github.com/deltachat/deltachat-android/issues/2040
-   * where network changes during sharing lead to a bug
+   * Test direct sharing from a screenshot. Also, this is the regression test for
+   * https://github.com/deltachat/deltachat-android/issues/2040 where network changes during sharing
+   * lead to a bug
    */
   @Test
   public void testShareFromScreenshot() {
@@ -92,20 +95,25 @@ public class SharingTest {
         pngImage = file;
       }
     }
-    Uri uri = Uri.parse("content://" + BuildConfig.APPLICATION_ID + ".attachments/" + Uri.encode(pngImage));
+    Uri uri =
+        Uri.parse(
+            "content://" + BuildConfig.APPLICATION_ID + ".attachments/" + Uri.encode(pngImage));
     DcHelper.sharedFiles.put(pngImage, "image/png");
 
     Intent i = new Intent(Intent.ACTION_SEND);
     i.setType("image/png");
     i.putExtra(Intent.EXTRA_SUBJECT, "Screenshot (Sep 27, 2021 00:00:00");
-    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
+    i.setFlags(
+        Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
             | Intent.FLAG_ACTIVITY_FORWARD_RESULT
             | Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP
             | Intent.FLAG_RECEIVER_FOREGROUND
             | Intent.FLAG_GRANT_READ_URI_PERMISSION);
     i.putExtra(Intent.EXTRA_STREAM, uri);
     i.putExtra(ShareActivity.EXTRA_CHAT_ID, createdGroupId);
-    i.setComponent(new ComponentName(getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
+    i.setComponent(
+        new ComponentName(
+            getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
     activityRule.getScenario().onActivity(a -> a.startActivity(i));
 
     TestUtils.waitForView(withId(R.id.send_button), 10000, 50);
@@ -121,16 +129,32 @@ public class SharingTest {
   }
 
   /**
-   * Tests https://github.com/deltachat/interface/blob/master/user-testing/mailto-links.md#mailto-links:
+   * Tests
+   * https://github.com/deltachat/interface/blob/master/user-testing/mailto-links.md#mailto-links:
    *
    * <ul dir="auto">
-   * <li><a href="mailto:abc@example.org">Just an email address</a> - should open a chat with <code>abc@example.org</code> (and maybe ask whether a chat should be created if it does not exist already)</li>
-   * <li><a href="mailto:abc@example.org?subject=testing%20mailto%20uris">email address with subject</a> - should open a chat with <code>abc@example.org</code> and fill <code>testing mailto uris</code>; as we created the chat in the previous step, it should not ask <code>Chat with …</code> but directly open the chat</li>
-   * <li><a href="mailto:abc@example.org?body=this%20is%20a%20test">email address with body</a> - should open a chat with <code>abc@example.org</code>, draft <code>this is a test</code></li>
-   * <li><a href="mailto:abc@example.org?subject=testing%20mailto%20uris&amp;body=this%20is%20a%20test">email address with subject and body</a> - should open a chat with <code>abc@example.org</code>, draft <code>testing mailto uris</code> &lt;newline&gt; <code>this is a test</code></li>
-   * <li><a href="mailto:%20info@example.org">HTML encoding</a> - should open a chat with <code>info@example.org</code></li>
-   * <li><a href="mailto:simplebot@example.org?body=!web%20https%3A%2F%2Fduckduckgo.com%2Flite%3Fq%3Dduck%2520it">more HTML encoding</a> - should open a chat with <code>simplebot@example.org</code>, draft <code>!web https://duckduckgo.com/lite?q=duck%20it</code></li>
-   * <li><a href="mailto:?subject=bla&amp;body=blub">no email, just subject&amp;body</a> - this should let you choose a chat and create a draft <code>bla</code> &lt;newline&gt; <code>blub</code> there</li>
+   *   <li><a href="mailto:abc@example.org">Just an email address</a> - should open a chat with
+   *       <code>abc@example.org</code> (and maybe ask whether a chat should be created if it does
+   *       not exist already)
+   *   <li><a href="mailto:abc@example.org?subject=testing%20mailto%20uris">email address with
+   *       subject</a> - should open a chat with <code>abc@example.org</code> and fill <code>
+   *       testing mailto uris</code>; as we created the chat in the previous step, it should not
+   *       ask <code>Chat with …</code> but directly open the chat
+   *   <li><a href="mailto:abc@example.org?body=this%20is%20a%20test">email address with body</a> -
+   *       should open a chat with <code>abc@example.org</code>, draft <code>this is a test</code>
+   *   <li><a
+   *       href="mailto:abc@example.org?subject=testing%20mailto%20uris&amp;body=this%20is%20a%20test">email
+   *       address with subject and body</a> - should open a chat with <code>abc@example.org</code>,
+   *       draft <code>testing mailto uris</code> &lt;newline&gt; <code>this is a test</code>
+   *   <li><a href="mailto:%20info@example.org">HTML encoding</a> - should open a chat with <code>
+   *       info@example.org</code>
+   *   <li><a
+   *       href="mailto:simplebot@example.org?body=!web%20https%3A%2F%2Fduckduckgo.com%2Flite%3Fq%3Dduck%2520it">more
+   *       HTML encoding</a> - should open a chat with <code>simplebot@example.org</code>, draft
+   *       <code>!web https://duckduckgo.com/lite?q=duck%20it</code>
+   *   <li><a href="mailto:?subject=bla&amp;body=blub">no email, just subject&amp;body</a> - this
+   *       should let you choose a chat and create a draft <code>bla</code> &lt;newline&gt; <code>
+   *       blub</code> there
    * </ul>
    */
   @Test
@@ -140,7 +164,8 @@ public class SharingTest {
 
     openLink("mailto:abc@example.org?subject=testing%20mailto%20uris");
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
-    onView(withHint(R.string.chat_input_placeholder)).check(matches(withText("testing mailto uris")));
+    onView(withHint(R.string.chat_input_placeholder))
+        .check(matches(withText("testing mailto uris")));
 
     openLink("mailto:abc@example.org?body=this%20is%20a%20test");
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
@@ -148,17 +173,22 @@ public class SharingTest {
 
     openLink("mailto:abc@example.org?subject=testing%20mailto%20uris&body=this%20is%20a%20test");
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
-    onView(withHint(R.string.chat_input_placeholder)).check(matches(withText("testing mailto uris\nthis is a test")));
+    onView(withHint(R.string.chat_input_placeholder))
+        .check(matches(withText("testing mailto uris\nthis is a test")));
 
     openLink("mailto:%20abc@example.org");
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
 
-    openLink("mailto:abc@example.org?body=!web%20https%3A%2F%2Fduckduckgo.com%2Flite%3Fq%3Dduck%2520it");
+    openLink(
+        "mailto:abc@example.org?body=!web%20https%3A%2F%2Fduckduckgo.com%2Flite%3Fq%3Dduck%2520it");
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
-    onView(withHint(R.string.chat_input_placeholder)).check(matches(withText("!web https://duckduckgo.com/lite?q=duck%20it")));
+    onView(withHint(R.string.chat_input_placeholder))
+        .check(matches(withText("!web https://duckduckgo.com/lite?q=duck%20it")));
 
     openLink("mailto:?subject=bla&body=blub");
-    onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
+    onView(withId(R.id.list))
+        .perform(
+            RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
     onView(withId(R.id.subtitle)).check(matches(withText("abc@example.org")));
     onView(withHint(R.string.chat_input_placeholder)).check(matches(withText("bla\nblub")));
   }
@@ -170,49 +200,61 @@ public class SharingTest {
   }
 
   /**
+   *
+   *
    * <ul dir="auto">
-   * <li>Open Saved Messages chat (could be any other chat too)</li>
-   * <li>Go to another app and share some text to DC</li>
-   * <li>In DC select Saved Messages. Edit the shared text if you like. <em>Don't</em> hit the Send button.</li>
-   * <li>Leave DC</li>
-   * <li>Open DC again from the "Recent apps"</li>
-   * <li>Check that your draft is still there</li>
+   *   <li>Open Saved Messages chat (could be any other chat too)
+   *   <li>Go to another app and share some text to DC
+   *   <li>In DC select Saved Messages. Edit the shared text if you like. <em>Don't</em> hit the
+   *       Send button.
+   *   <li>Leave DC
+   *   <li>Open DC again from the "Recent apps"
+   *   <li>Check that your draft is still there
    * </ul>
    */
   @Test
   public void testOpenAgainFromRecents() {
     // Open a chat
-    onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
+    onView(withId(R.id.list))
+        .perform(
+            RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
 
     // Share some text to DC
     Intent i = new Intent(Intent.ACTION_SEND);
     i.putExtra(Intent.EXTRA_TEXT, "Veeery important draft");
-    i.setComponent(new ComponentName(getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
+    i.setComponent(
+        new ComponentName(
+            getInstrumentation().getTargetContext().getApplicationContext(), ShareActivity.class));
     activityRule.getScenario().onActivity(a -> a.startActivity(i));
 
     // In DC, select the same chat you opened before
-    onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
+    onView(withId(R.id.list))
+        .perform(
+            RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
 
     // Leave DC and go back to the previous activity
     pressBack();
 
     // Here, we can't exactly replicate the "steps to reproduce". Previously, the other activity
     // stayed open in the background, but since it doesn't anymore, we need to open it again:
-    onView(withId(R.id.list)).perform(RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
+    onView(withId(R.id.list))
+        .perform(
+            RecyclerViewActions.actionOnItem(hasDescendant(withText("abc@example.org")), click()));
 
     // Check that the draft is still there
     // Util.sleep(2000);  // Uncomment for debugging
-    onView(withHint(R.string.chat_input_placeholder)).check(matches(withText("Veeery important draft")));
+    onView(withHint(R.string.chat_input_placeholder))
+        .check(matches(withText("Veeery important draft")));
   }
 
   /**
    * Regression test:
    *
-   * If you save your contacts's emails in the contacts app of the phone, there are buttons to call
-   * them and also to write an email to them.
+   * <p>If you save your contacts's emails in the contacts app of the phone, there are buttons to
+   * call them and also to write an email to them.
    *
-   * If you click the email button, ArcaneChat opened but instead of opening a chat with that contact,
-   * the chat list was show and "share with" was displayed at the top
+   * <p>If you click the email button, Delta Chat opened but instead of opening a chat with that
+   * contact, the chat list was show and "share with" was displayed at the top
    */
   @Test
   public void testOpenChatFromContacts() {

src/androidTest/java/com/b44t/messenger/uitests/online/OnboardingTest.java

@@ -1,6 +1,5 @@
 package com.b44t.messenger.uitests.online;
 
-
 import static androidx.test.espresso.Espresso.onView;
 import static androidx.test.espresso.action.ViewActions.click;
 import static androidx.test.espresso.action.ViewActions.replaceText;
@@ -11,13 +10,10 @@ import static androidx.test.espresso.matcher.ViewMatchers.withHint;
 import static androidx.test.espresso.matcher.ViewMatchers.withText;
 
 import android.text.TextUtils;
-
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
-
 import com.b44t.messenger.TestUtils;
-
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
@@ -30,14 +26,16 @@ import org.thoughtcrime.securesms.WelcomeActivity;
 @LargeTest
 public class OnboardingTest {
   @Rule
-  public ActivityScenarioRule<WelcomeActivity> activityRule = TestUtils.getOnlineActivityRule(WelcomeActivity.class);
+  public ActivityScenarioRule<WelcomeActivity> activityRule =
+      TestUtils.getOnlineActivityRule(WelcomeActivity.class);
 
   @Test
   public void testAccountCreation() {
     if (TextUtils.isEmpty(BuildConfig.TEST_ADDR) || TextUtils.isEmpty(BuildConfig.TEST_MAIL_PW)) {
-      throw new RuntimeException("You need to set TEST_ADDR and TEST_MAIL_PW; " +
-              "either in gradle.properties or via an environment variable. " +
-              "See README.md for more details.");
+      throw new RuntimeException(
+          "You need to set TEST_ADDR and TEST_MAIL_PW; "
+              + "either in gradle.properties or via an environment variable. "
+              + "See README.md for more details.");
     }
     onView(withText(R.string.scan_invitation_code)).check(matches(isClickable()));
     onView(withText(R.string.import_backup_title)).check(matches(isClickable()));

src/debug/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,19 @@
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="228"
+    android:viewportHeight="280">
+    <group
+        android:scaleX="0.35014287"
+        android:scaleY="0.43"
+        android:translateX="74.08372"
+        android:translateY="79.8">
+        <path
+            android:pathData="m10.03,234.14c0.3,-0.01 0.6,-0.02 0.9,-0.04 -0.07,-0.49 -0.14,-0.97 -0.2,-1.46 -0.15,-1.34 -0.26,-2.69 -0.25,-4.04 -0.02,-0.86 -0.05,-1.71 -0.07,-2.57 -0.09,-0.06 -0.18,-0.13 -0.27,-0.19 -0.02,-0.02 -0.04,-0.03 -0.07,-0.05zM44.87,232.95c11.71,-8.35 26.86,-14.79 46.21,-15.9 0,0 39.93,-0.27 47.91,-3.53 7.98,-3.26 68.68,-14.69 82.94,-98.43 14.26,-83.74 -1.06,-115.09 -1.06,-115.09 0,0 -21.14,55.68 -81.02,59.81 0,0 -14.5,1.03 -38.82,1.42 -24.32,0.39 -75.77,20.65 -90.55,85.62l-0.22,43.44c2.5,4.22 5.49,8.12 8.91,11.66 3.99,4.11 8.11,8.12 12.79,11.45 2.26,1.65 4.65,3.2 6.51,5.33 1.94,2.34 3.33,5 4.2,7.93 0.71,2.1 1.45,4.2 2.2,6.28z"
+            android:fillColor="@color/ic_launcher_background" />
+        <path
+            android:pathData="m217.97,45.86c-0.3,0.01 -0.6,0.02 -0.9,0.04 0.07,0.49 0.14,0.97 0.2,1.46 0.15,1.34 0.26,2.69 0.25,4.04 0.02,0.86 0.05,1.71 0.07,2.57 0.09,0.06 0.18,0.13 0.27,0.19 0.02,0.02 0.04,0.03 0.07,0.05zM183.13,47.05c-11.71,8.35 -26.86,14.79 -46.21,15.9 0,0 -39.93,0.27 -47.91,3.53 -7.98,3.26 -68.68,14.69 -82.94,98.43 -14.26,83.74 1.06,115.09 1.06,115.09 0,0 21.14,-55.68 81.02,-59.81 0,0 14.5,-1.03 38.82,-1.42 24.32,-0.39 75.77,-20.65 90.55,-85.62l0.22,-43.44c-2.5,-4.22 -5.49,-8.12 -8.91,-11.66 -3.99,-4.11 -8.11,-8.12 -12.79,-11.45 -2.26,-1.65 -4.65,-3.2 -6.51,-5.33 -1.94,-2.34 -3.33,-5 -4.2,-7.93 -0.71,-2.1 -1.45,-4.2 -2.2,-6.28z"
+            android:fillColor="@color/ic_launcher_background" />
+    </group>
+</vector>

src/debug/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/white" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

src/debug/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/white" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

src/foss/AndroidManifest.xml

@@ -1,14 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          xmlns:tools="http://schemas.android.com/tools">
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
 
-  <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
+    <uses-permission
+        android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
 
-  <application>
-    <service
-        android:name=".connect.KeepAliveService"
-        android:foregroundServiceType="specialUse"
-        android:enabled="true" />
-  </application>
+    <application>
+        <service
+            android:name=".connect.KeepAliveService"
+            android:foregroundServiceType="specialUse"
+            android:enabled="true" />
+    </application>
 
 </manifest>

src/foss/java/org/thoughtcrime/securesms/geolocation/LocationSourceFactory.java

@@ -0,0 +1,17 @@
+package org.thoughtcrime.securesms.geolocation;
+
+import android.content.Context;
+import android.util.Log;
+
+/** Non-GMS, always uses the platform LocationManager. */
+public final class LocationSourceFactory {
+
+  private static final String TAG = "LocationSourceFactory";
+
+  private LocationSourceFactory() {}
+
+  public static LocationSource create(Context context) {
+    Log.i(TAG, "Non-GMS build, Using platform LocationManager");
+    return new PlatformLocationSource();
+  }
+}

src/foss/java/org/thoughtcrime/securesms/notifications/FcmReceiveService.java

@@ -1,7 +1,6 @@
 package org.thoughtcrime.securesms.notifications;
 
 import android.content.Context;
-
 import androidx.annotation.Nullable;
 
 /*
@@ -10,6 +9,11 @@ import androidx.annotation.Nullable;
 */
 public class FcmReceiveService {
   public static void register(Context context) {}
+
   public static void waitForRegisterFinished() {}
-  @Nullable public static String getToken() { return null; }
+
+  @Nullable
+  public static String getToken() {
+    return null;
+  }
 }

src/gplay/AndroidManifest.xml

@@ -1,34 +1,38 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          xmlns:tools="http://schemas.android.com/tools">
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
 
-  <!-- force compiling emojipicker on sdk<21 and firebase on sdk<19; runtime checks are required then -->
-  <uses-sdk tools:overrideLibrary="androidx.emoji2.emojipicker, com.google.firebase.messaging, com.google.android.gms.cloudmessaging"/>
+    <meta-data
+        android:name="firebase_analytics_collection_deactivated"
+        android:value="true" />
+    <meta-data
+        android:name="google_analytics_adid_collection_enabled"
+        android:value="false" />
+    <meta-data
+        android:name="firebase_messaging_auto_init_enabled"
+        android:value="false" />
 
-  <meta-data android:name="firebase_analytics_collection_deactivated" android:value="true" />
-  <meta-data android:name="google_analytics_adid_collection_enabled" android:value="false" />
-  <meta-data android:name="firebase_messaging_auto_init_enabled" android:value="false" />
+    <application>
+        <service
+            android:name=".connect.KeepAliveService"
+            android:foregroundServiceType="dataSync"
+            android:enabled="true" />
 
-  <application>
-    <service
-        android:name=".connect.KeepAliveService"
-        android:foregroundServiceType="dataSync"
-        android:enabled="true" />
+        <service
+            android:name=".notifications.FcmReceiveService"
+            android:foregroundServiceType="dataSync"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
 
-    <service
-        android:name=".notifications.FcmReceiveService"
-        android:foregroundServiceType="dataSync"
-        android:exported="true">
-      <intent-filter>
-        <action android:name="com.google.firebase.MESSAGING_EVENT" />
-      </intent-filter>
-    </service>
-
-    <provider
-        android:name="com.google.firebase.provider.FirebaseInitProvider"
-        android:authorities="${applicationId}.firebaseinitprovider"
-        tools:node="remove">
-    </provider>
-  </application>
+        <provider
+            android:name="com.google.firebase.provider.FirebaseInitProvider"
+            android:authorities="${applicationId}.firebaseinitprovider"
+            tools:node="remove">
+        </provider>
+    </application>
 
 </manifest>

src/gplay/java/org/thoughtcrime/securesms/geolocation/GmsLocationSource.java

@@ -0,0 +1,61 @@
+package org.thoughtcrime.securesms.geolocation;
+
+import android.content.Context;
+import android.location.Location;
+import android.os.Looper;
+import android.util.Log;
+import androidx.annotation.NonNull;
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationCallback;
+import com.google.android.gms.location.LocationRequest;
+import com.google.android.gms.location.LocationResult;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.location.Priority;
+
+public class GmsLocationSource implements LocationSource {
+
+  private static final String TAG = "GmsLocationSource";
+  private static final long UPDATE_INTERVAL_MS = 3_000;
+  private static final long FASTEST_INTERVAL_MS = 1_000;
+
+  private FusedLocationProviderClient client;
+  private LocationCallback locationCallback;
+
+  @Override
+  public void startUpdates(@NonNull Context context, @NonNull Callback callback) {
+    client = LocationServices.getFusedLocationProviderClient(context);
+
+    LocationRequest request =
+        new LocationRequest.Builder(Priority.PRIORITY_HIGH_ACCURACY, UPDATE_INTERVAL_MS)
+            .setMinUpdateIntervalMillis(FASTEST_INTERVAL_MS)
+            .setMinUpdateDistanceMeters(0)
+            .setWaitForAccurateLocation(false)
+            .build();
+
+    locationCallback =
+        new LocationCallback() {
+          @Override
+          public void onLocationResult(@NonNull LocationResult result) {
+            Location loc = result.getLastLocation();
+            if (loc != null) {
+              callback.onLocationUpdate(loc);
+            }
+          }
+        };
+
+    try {
+      client.requestLocationUpdates(request, locationCallback, Looper.getMainLooper());
+    } catch (SecurityException e) {
+      Log.e(TAG, "Missing location permission", e);
+    }
+  }
+
+  @Override
+  public void stopUpdates() {
+    if (client != null && locationCallback != null) {
+      client.removeLocationUpdates(locationCallback);
+      client = null;
+      locationCallback = null;
+    }
+  }
+}

src/gplay/java/org/thoughtcrime/securesms/geolocation/LocationSourceFactory.java

@@ -0,0 +1,35 @@
+package org.thoughtcrime.securesms.geolocation;
+
+import android.content.Context;
+import android.util.Log;
+import com.google.android.gms.common.ConnectionResult;
+import com.google.android.gms.common.GoogleApiAvailability;
+
+/**
+ * Prefers FusedLocationProviderClient, falls back to platform LocationManager if Play Services are
+ * somehow unavailable.
+ */
+public final class LocationSourceFactory {
+
+  private static final String TAG = "LocationSourceFactory";
+
+  private LocationSourceFactory() {}
+
+  public static LocationSource create(Context context) {
+    if (isGmsAvailable(context)) {
+      Log.i(TAG, "Using FusedLocationProviderClient");
+      return new GmsLocationSource();
+    }
+    Log.i(TAG, "GMS unavailable, falling back to LocationManager");
+    return new PlatformLocationSource();
+  }
+
+  private static boolean isGmsAvailable(Context context) {
+    try {
+      return GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context)
+          == ConnectionResult.SUCCESS;
+    } catch (Exception e) {
+      return false;
+    }
+  }
+}

src/gplay/java/org/thoughtcrime/securesms/notifications/FcmReceiveService.java

@@ -1,27 +1,23 @@
 package org.thoughtcrime.securesms.notifications;
 
 import android.content.Context;
-import android.os.Build;
 import android.text.TextUtils;
 import android.util.Log;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.WorkerThread;
-
 import com.google.android.gms.tasks.Tasks;
 import com.google.firebase.FirebaseApp;
 import com.google.firebase.messaging.FirebaseMessaging;
 import com.google.firebase.messaging.FirebaseMessagingService;
 import com.google.firebase.messaging.RemoteMessage;
-
 import org.thoughtcrime.securesms.ApplicationContext;
 import org.thoughtcrime.securesms.BuildConfig;
 import org.thoughtcrime.securesms.service.FetchForegroundService;
 import org.thoughtcrime.securesms.util.Util;
 
 public class FcmReceiveService extends FirebaseMessagingService {
-  private static final String TAG = FcmReceiveService.class.getSimpleName();
+  private static final String TAG = "FcmReceiveService";
   private static final Object INIT_LOCK = new Object();
   private static boolean initialized;
   private static volatile boolean triedRegistering;
@@ -35,36 +31,38 @@ public class FcmReceiveService extends FirebaseMessagingService {
       return;
     }
 
-    Util.runOnAnyBackgroundThread(() -> {
-      final String rawToken;
+    Util.runOnAnyBackgroundThread(
+        () -> {
+          final String rawToken;
 
-      try {
-        synchronized (INIT_LOCK) {
-          if (!initialized) {
-            // manual init: read tokens from `./google-services.json`;
-            // automatic init disabled in AndroidManifest.xml to skip FCM code completely.
-            FirebaseApp.initializeApp(context);
+          try {
+            synchronized (INIT_LOCK) {
+              if (!initialized) {
+                // manual init: read tokens from `./google-services.json`;
+                // automatic init disabled in AndroidManifest.xml to skip FCM code completely.
+                FirebaseApp.initializeApp(context);
+              }
+              initialized = true;
+            }
+            rawToken = Tasks.await(FirebaseMessaging.getInstance().getToken());
+          } catch (Exception e) {
+            // we're here usually when FCM is not available and initializeApp() or getToken()
+            // failed.
+            Log.w(TAG, "cannot get FCM token for " + BuildConfig.APPLICATION_ID + ": " + e);
+            triedRegistering = true;
+            return;
+          }
+          if (TextUtils.isEmpty(rawToken)) {
+            Log.w(TAG, "got empty FCM token for " + BuildConfig.APPLICATION_ID);
+            triedRegistering = true;
+            return;
           }
-          initialized = true;
-        }
-        rawToken = Tasks.await(FirebaseMessaging.getInstance().getToken());
-      } catch (Exception e) {
-        // we're here usually when FCM is not available and initializeApp() or getToken() failed.
-        Log.w(TAG, "cannot get FCM token for " + BuildConfig.APPLICATION_ID + ": " + e);
-        triedRegistering = true;
-        return;
-      }
-      if (TextUtils.isEmpty(rawToken)) {
-        Log.w(TAG, "got empty FCM token for " + BuildConfig.APPLICATION_ID);
-        triedRegistering = true;
-        return;
-      }
 
-      prefixedToken = addPrefix(rawToken);
-      Log.i(TAG, "FCM token: " + prefixedToken);
-      ApplicationContext.getDcAccounts().setPushDeviceToken(prefixedToken);
-      triedRegistering = true;
-    });
+          prefixedToken = addPrefix(rawToken);
+          Log.i(TAG, "FCM token: " + prefixedToken);
+          ApplicationContext.getDcAccounts().setPushDeviceToken(prefixedToken);
+          triedRegistering = true;
+        });
   }
 
   // wait a until FCM registration got a token or not.
@@ -91,7 +89,20 @@ public class FcmReceiveService extends FirebaseMessagingService {
   @Override
   public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
     Log.i(TAG, "FCM push notification received");
-    FetchForegroundService.start(this);
+    // Note: The system can downgrade the high priority messages to normal priority
+    // if the app is not using the high priority messages for surfacing time sensitive
+    // content to the user. If the message's priority is downgraded, your app cannot
+    // start a foreground service and attempting to start one results in a
+    // ForegroundServiceStartNotAllowedException.
+    // So, it's recommended to check the result of RemoteMessage.getPriority() and
+    // confirm it's PRIORITY_HIGH() before attempting to start a foreground service.
+    // source:
+    // https://developer.android.com/develop/background-work/services/fgs/restrictions-bg-start
+    if (remoteMessage.getPriority() == RemoteMessage.PRIORITY_HIGH) {
+      FetchForegroundService.start(this);
+    } else {
+      FetchForegroundService.fetchSynchronously();
+    }
   }
 
   @Override

src/main/assets/help/cs/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#podporuje-delta-chat-obrázky-videa-a-jiné-přílohy">Podporuje Delta Chat obrázky, videa a jiné přílohy?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#kdo-uvidí-můj-profilový-obrázek">Kdo uvidí můj profilový obrázek?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#what-does-the-green-dot-mean">What does the green dot mean?</a></li>
       <li><a href="#what-do-the-ticks-shown-beside-outgoing-messages-mean">What do the ticks shown beside outgoing messages mean?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
-      <li><a href="#delold">What happens if I turn on “Delete old messages from device”?</a></li>
+      <li><a href="#delold">What happens if I turn on “Delete Messages from Device”?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#kdyź-se-nedopatřením-odstraníš">Kdyź se nedopatřením odstraníš.</a></li>
       <li><a href="#nechci-již-přijímat-zprávy-ze-skupiny">Nechci již přijímat zprávy ze skupiny.</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">How does Delta Chat protect metadata in messages?</a></li>
       <li><a href="#device-seizure">How to protect metadata and contacts when a device is seized?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="podporuje-delta-chat-obrázky-videa-a-jiné-přílohy">
-        
-        
-          Podporuje Delta Chat obrázky, videa a jiné přílohy? <a href="#podporuje-delta-chat-obrázky-videa-a-jiné-přílohy" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Yes. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>For performance, images are optimized and sent at a smaller size by default, but you can send it as a “file” to preserve the original.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,14 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Profilový obrázek lze zvolit v nastavení. Když napíšeš svému kontaktu,
+<p>Profilový obrázek lze zvolit v nastavení. Když napíšeš svému kontaktu,
 nebo přidáš nový vyfocením QR kódu, tyto kontakty automaticky uvidí tvůj profilový obrázek.</p>
-  </li>
-  <li>
-    <p>Z důvodu soukromí nikdo nevidí tvůj profilový obrázek dokud jim nenapíšeš.</p>
-  </li>
+
+<ul>
+  <li>Z důvodu soukromí nikdo nevidí tvůj profilový obrázek dokud jim nenapíšeš.</li>
 </ul>
     
       <h3 id="signature">
@@ -304,7 +301,8 @@ they will see it when they view your contact details.</p>
   </li>
   <li>
     <p><strong>Archive chats</strong> if you do not want to see them in your chat list any longer.
-Archived chats remain accessible above the chat list or via search.</p>
+They remain accessible above the chat list or via search
+and are marked by <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Archived</b></p>
   </li>
   <li>
     <p>When an archived chat gets a new message, unless muted, it will <strong>pop out of the archive</strong> and back into your chat list.
@@ -339,7 +337,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -376,22 +374,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -420,6 +414,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -456,19 +476,18 @@ the (anyway encrypted) messages may take longer to get deleted from their server
       <h3 id="delold">
         
         
-          What happens if I turn on “Delete old messages from device”? <a href="#delold" class="anchor"></a>
+          What happens if I turn on “Delete Messages from Device”? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>If you want to save storage on your device, you can choose to delete old
-messages automatically.</li>
-  <li>To turn it on, go to “delete old messages from device” in the “Chats &amp; Media”
-settings. You can set a timeframe between “after an hour” and “after a year”;
+<p>If you want to save storage on your device, you can choose to delete old
+messages automatically.</p>
+
+<p>To turn it on, go to <strong>Settings → Chats → Delete Message from Device</strong>.
+You can set a timeframe between “after an hour” and “after a year”;
 this way, <em>all</em> messages will be deleted from your device as soon as they are
-older than that.</li>
-</ul>
+older than that.</p>
     
       <h3 id="remove-account">
         
@@ -516,9 +535,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Z menu v pravém horním rohu, nebo stiskem příslušného tlačítka na Androidu / iOS vyber <strong>Nový hovor</strong> a pak <strong>Nová skupina</strong>.</li>
-  <li>Na další obrazovce, vyber <strong>členy skupiny</strong> a zadej <strong>Název skupiny</strong>. Také můžeš vybrat  <strong>obrázek skupiny</strong>.</li>
-  <li>Jakmile do skupiny pošleš <strong>první zprávu</strong>, všichni členové budou vyrozuměni o nové skupině a mohou do ní také psát (dokud nepošleš první zprávu členové skupiny o ní nebudou vědět).</li>
+  <li>
+    <p>Z menu v pravém horním rohu, nebo stiskem příslušného tlačítka na Androidu / iOS vyber <strong>Nový hovor</strong> a pak <strong>Nová skupina</strong>.</p>
+  </li>
+  <li>
+    <p>Na další obrazovce, vyber <strong>členy skupiny</strong> a zadej <strong>Název skupiny</strong>. Také můžeš vybrat  <strong>obrázek skupiny</strong>.</p>
+  </li>
+  <li>
+    <p>Jakmile do skupiny pošleš <strong>první zprávu</strong>, všichni členové budou vyrozuměni o nové skupině a mohou do ní také psát (dokud nepošleš první zprávu členové skupiny o ní nebudou vědět).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -529,11 +554,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -561,10 +585,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Když nejsi členem skupiny nelze se znovu připojit. Nicméně, není to velká potíž - 
-požádej běžnou zprávou jiného člena skupiny o znovupřipojení.</li>
-</ul>
+<p>Když nejsi členem skupiny nelze se znovu připojit. Nicméně, není to velká potíž - 
+požádej běžnou zprávou jiného člena skupiny o znovupřipojení.</p>
     
       <h3 id="nechci-již-přijímat-zprávy-ze-skupiny">
         
@@ -575,15 +597,12 @@ požádej běžnou zprávou jiného člena skupiny o znovupřipojení.</li>
       </h3>
 
 <ul>
-  <li>
-    <p>Buď se odeber ze seznamu členů a nebo vymaž celý skupinový hovor.
-K opětovnému připojení v budoucnu požádej nějakého člena skupiny o znovupřidání.</p>
-  </li>
-  <li>
-    <p>Jiná možnost je “Umlčení” skupiny, což znamená nadále přijímat a také posílat zprávy, 
-ale nebudeš dostávat upozrnění na nově příchozí zprávy.</p>
-  </li>
+  <li>Buď se odeber ze seznamu členů a nebo vymaž celý skupinový hovor.
+K opětovnému připojení v budoucnu požádej nějakého člena skupiny o znovupřidání.</li>
 </ul>
+
+<p>Jiná možnost je “Umlčení” skupiny, což znamená nadále přijímat a také posílat zprávy, 
+ale nebudeš dostávat upozrnění na nově příchozí zprávy.</p>
     
       <h3 id="cloning-a-group">
         
@@ -609,6 +628,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -897,7 +1122,7 @@ One device is not needed for the other to work.</p>
     <p>Double-check both devices are in the <strong>same Wi-Fi or network</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -991,10 +1216,10 @@ Všechny softwarové balíčky jsou na <a href="https://get.delta.chat">get.delt
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1024,22 +1249,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1153,9 +1382,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Dobrý začátek je <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</li>
-</ul>
+<p>Dobrý začátek je <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1184,6 +1411,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1368,12 +1599,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1394,6 +1623,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1423,7 +1675,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1434,12 +1686,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1449,12 +1698,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1531,7 +1781,7 @@ See <a href="https://delta.chat/en/2023-05-22-webxdc-security">here for the full
   <li>
     <p>2023 March, <a href="https://cure53.de">Cure53</a> analyzed both the transport encryption of
 Delta Chat’s network connections and a reproducible mail server setup as
-<a href="https://delta.chat/cs/serverguide">recommended on this site</a>.
+<a href="https://delta.chat/serverguide">recommended on this site</a>.
 You can read more about the audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">on our blog</a>
 or read the <a href="https://delta.chat/assets/blog/MER-01-report.pdf">full report here</a>.</p>
   </li>
@@ -1633,52 +1883,38 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a 
-first 2018/2019 grant (~$200K) during which we majorly improved the Android app 
-and released a first Desktop app beta version, and which moreover 
-moored our feature developments in UX research in human rights contexts, 
-see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-The second 2019/2020 grant (~$300K) helped us to 
-release Delta/iOS versions, to convert our core library to Rust, and
-to provide new features for all platforms.</p>
-  </li>
-  <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
   </li>
   <li>
     <p>In 2021 we received further EU funding for two Next-Generation-Internet
 proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
   </li>
   <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
+    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
+completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
   </li>
   <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
+    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a
+first 2018/2019 grant (~$200K) during which we majorly improved the Android app
+and released a first Desktop app beta version, and which moreover
+moored our feature developments in UX research in human rights contexts,
+see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+The second 2019/2020 grant (~$300K) helped us to
+release Delta/iOS versions, to convert our core library to Rust, and
+to provide new features for all platforms.</p>
   </li>
   <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
+and implementation of verified groups and setup contact protocols
+in 2017 and 2018 and also helped to integrate end-to-end Encryption
+through <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Sometimes we receive one-time donations from private individuals. 

src/main/assets/help/de/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">Wie finde ich Leute, mit denen ich chatten kann?</a></li>
       <li><a href="#warum-ist-ein-chat-als-anfrage-markiert">Warum ist ein Chat als “Anfrage” markiert?</a></li>
       <li><a href="#wie-kann-ich-zwei-meiner-freunde-miteinander-in-kontakt-bringen">Wie kann ich zwei meiner Freunde miteinander in Kontakt bringen?</a></li>
-      <li><a href="#unterstützt-delta-chat-bilder-videos-und-dateianhänge">Unterstützt Delta Chat Bilder, Videos und Dateianhänge?</a></li>
       <li><a href="#multiple-accounts">Was sind Profile? Wie kann ich zwischen ihnen wechseln?</a></li>
       <li><a href="#wer-sieht-mein-profilbild">Wer sieht mein Profilbild?</a></li>
       <li><a href="#signature">Kann ich einen Status festlegen?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#was-bedeutet-der-grüne-punkt">Was bedeutet der grüne Punkt?</a></li>
       <li><a href="#was-bedeuten-die-häkchen-neben-den-ausgehenden-nachrichten">Was bedeuten die Häkchen neben den ausgehenden Nachrichten?</a></li>
       <li><a href="#edit">Schreibfehler korrigieren und Nachrichten nach dem Senden löschen</a></li>
+      <li><a href="#mediaquality">Medienqualität und Datenverbrauch</a></li>
       <li><a href="#ephemeralmsgs">Wie funktionieren “Verschwindende Nachrichten”?</a></li>
-      <li><a href="#delold">Was passiert, wenn ich “Alte Nachrichten vom Gerät löschen” aktiviere?</a></li>
+      <li><a href="#delold">Was passiert, wenn ich “Nachrichten vom Gerät löschen” aktiviere?</a></li>
       <li><a href="#remove-account">Wie kann ich mein Chat-Profil löschen?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#ich-habe-mich-selbst-versehentlich-gelöscht">Ich habe mich selbst versehentlich gelöscht.</a></li>
       <li><a href="#ich-möchte-keine-nachrichten-einer-gruppe-mehr-empfangen">Ich möchte keine Nachrichten einer Gruppe mehr empfangen.</a></li>
       <li><a href="#eine-gruppe-klonen">Eine Gruppe klonen</a></li>
+      <li><a href="#wie-viele-mitglieder-können-in-einer-einzelnen-gruppe-sein">Wie viele Mitglieder können in einer einzelnen Gruppe sein?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Kanäle</a>
+    <ul>
+      <li><a href="#einem-kanal-beitreten">Einem Kanal beitreten</a></li>
+      <li><a href="#einen-kanal-erstellen">Einen Kanal erstellen</a></li>
+      <li><a href="#wie-viele-empfänger-kann-ein-kanal-haben">Wie viele Empfänger kann ein Kanal haben?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Anrufe</a>
+    <ul>
+      <li><a href="#jemanden-anrufen">Jemanden anrufen</a></li>
+      <li><a href="#einen-anruf-annehmen-oder-ablehnen">Einen Anruf annehmen oder ablehnen</a></li>
+      <li><a href="#während-des-anrufs">Während des Anrufs</a></li>
+      <li><a href="#verpasste-anrufe-und-benachrichtigungen">Verpasste Anrufe und Benachrichtigungen</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-Chat-Apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#erweitert">Erweitert</a>
     <ul>
-      <li><a href="#experimentelle-features">Experimentelle Features</a></li>
+      <li><a href="#experiments">Experimentelle Features</a></li>
       <li><a href="#relays">Was sind Relays?</a></li>
       <li><a href="#kann-ich-eine-klassische-e-mail-adresse-mit-delta-chat-verwenden">Kann ich eine klassische E-Mail-Adresse mit Delta Chat verwenden?</a></li>
       <li><a href="#classic-email">Wie kann ich ein Chat-Profil mit einer klassischen E-Mail-Adresse als Relay konfigurieren?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Sind mit dem Mail-Symbol markierte Nachrichten im Internet sichtbar?</a></li>
       <li><a href="#message-metadata">Wie schützt Delta Chat Metadaten in Nachrichten?</a></li>
       <li><a href="#device-seizure">Wie schützt man Metadaten und Kontakte, wenn ein Gerät beschlagnahmt wird?</a></li>
+      <li><a href="#wer-sieht-meine-ip-adresse">Wer sieht meine IP-Adresse?</a></li>
       <li><a href="#sealedsender">Unterstützt Delta Chat „Sealed Sender“?</a></li>
       <li><a href="#pfs">Unterstützt Delta Chat “Perfect Forward Secrecy”?</a></li>
       <li><a href="#pqc">Unterstützt Delta Chat Post-Quantum-Verschlüsselung?</a></li>
@@ -107,7 +124,7 @@
 
 <ul>
   <li>
-    <p>Einfache Erstellung von <strong>privaten Chat-Profile</strong> mit sicheren, schnellen und interoperablen <a href="https://chatmail.at/relays">Chatmail-Servern</a>,
+    <p>Einfache Erstellung von <strong>privaten Chat-Profilen</strong> mit sicheren, schnellen und interoperablen <a href="https://chatmail.at/relays">Chatmail-Servern</a>,
 die sofortige Push-Benachrichtigungen für iOS- und Android-Geräte bieten.</p>
   </li>
   <li>
@@ -135,17 +152,17 @@ basierend auf <a href="https://github.com/chatmail/core/blob/main/standards.md#s
       </h3>
 
 <p>Beachte zunächst, dass Delta Chat ein privater Messenger ist.
-Es gibt keine öffentliches Verzeichnis, du entscheiden selbst über deine Kontakte.</p>
+Es gibt kein öffentliches Verzeichnis, du entscheidest selbst über deine Kontakte.</p>
 
 <ul>
   <li>
     <p>Wenn du <strong>persönlich</strong> mit deinen Freunden oder Familie zusammen bist,
 tippe auf das <strong>QR-Code</strong>-Symbol <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" />
 auf dem Hauptbildschirm.<br />
-Bitte deinen Chatpartner den QR-Code mit Delta Chat zu <strong>scannen</strong>.</p>
+Bitte dann deinen Chatpartner den QR-Code mit Delta Chat zu <strong>scannen</strong>.</p>
   </li>
   <li>
-    <p>Für eine Kontaktaufnahme <strong>aus der Ferne</strong>, klicke im selben Bildschirm auf “Kopieren” oder “Teilen” und sende den <strong>Einladungslink</strong> über einen anderen privaten Chat.</p>
+    <p>Für eine Kontaktaufnahme <strong>aus der Ferne</strong> klicke im selben Bildschirm auf “Kopieren” oder “Teilen” und sende den <strong>Einladungslink</strong> über einen anderen privaten Chat.</p>
   </li>
 </ul>
 
@@ -175,21 +192,21 @@ wird eine Ende-zu-Ende-Verschlüsselung zwischen allen Mitgliedern eingerichtet.
         
       </h3>
 
-<p>Da Delta Chat ein privater Messenger ist, können dir zunächst nur Freunde und Familienmitglieder, denen du deinen <a href="#howtoe2ee">QR-Code oder Einladungslink</a> schickst, schreiben.</p>
+<p>Da Delta Chat ein privater Messenger ist, können dir zunächst nur Freunde und Familienmitglieder schreiben, denen du deinen <a href="#howtoe2ee">QR-Code oder Einladungslink</a> schickst.</p>
 
-<p>Deine Freunde können deine Kontaktdaten dann mit anderen Freunden teilen. Dies wird als <strong>Anfrage</strong> angezeigt.</p>
+<p>Deine Freunde können deine Kontaktdaten dann mit anderen Freunden teilen. Dies wird als <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Anfrage</b> angezeigt.</p>
 
 <ul>
   <li>
     <p>Du musst die Anfrage <strong>akzeptieren</strong>, bevor du antworten kannst.</p>
   </li>
   <li>
-    <p>Du kannst sie auch “löschen”, wenn du vorerst nicht mit ihm chatten möchten.</p>
+    <p>Du kannst sie auch “löschen”, wenn du vorerst nicht mit dieser Person chatten möchtest.</p>
   </li>
   <li>
-    <p>If you delete a request, future messages from that contact will still appear
-as message request, so you can change your mind. If you really don’t want to
-receive messages from this person, consider <strong>blocking</strong> them.</p>
+    <p>Wenn du eine Anfrage löschst, werden zukünftige Nachrichten von diesem Kontakt weiterhin
+als Nachrichtenanfrage angezeigt, sodass du deine Meinung ändern kannst. Wenn du wirklich keine
+Nachrichten von dieser Person erhalten möchtest, solltest du sie <strong>blockieren</strong>.</p>
   </li>
 </ul>
     
@@ -207,24 +224,6 @@ Du kannst auch eine kurze Nachricht hinzufügen.</p>
 <p>Der zweite Kontakt erhält dann die <strong>Kontaktdaten</strong> und
 kann darauf tippen, um mit dem ersten Kontakt zu chatten.</p>
     
-      <h3 id="unterstützt-delta-chat-bilder-videos-und-dateianhänge">
-        
-        
-          Unterstützt Delta Chat Bilder, Videos und Dateianhänge? <a href="#unterstützt-delta-chat-bilder-videos-und-dateianhänge" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Ja. Bilder, Videos, Dateien, Sprachnachrichten und mehr können über die <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Anhang-</strong>
-bzw. <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Sprachnachricht</strong>-Buttons hinzugefügt werden</p>
-  </li>
-  <li>
-    <p>Um die Leistung zu verbessern, werden die Bilder standardmäßig optimiert und in einer kleineren Größe gesendet, aber du kannst sie auch als “Datei” senden, um das Original zu erhalten.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -244,7 +243,7 @@ oder <strong>Profile zu wechseln</strong>.</p>
 
 <p>Du kannst separate Profile für politische, familiäre oder berufliche Aktivitäten verwenden.</p>
 
-<p>Vielleicht möchtest due auch erfahren, wie du <a href="#multiclient">Profile auf mehreren Geräten verwenden kannst</a>.</p>
+<p>Vielleicht möchtest du auch erfahren, wie du <a href="#multiclient">Profile auf mehreren Geräten verwenden kannst</a>.</p>
     
       <h3 id="wer-sieht-mein-profilbild">
         
@@ -254,14 +253,9 @@ oder <strong>Profile zu wechseln</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Du kannst ein Profilbild in den Einstellungen hinzufügen. Wenn du deinen Kontakten eine Nachricht sendest oder sie über einen QR-Code hinzufügst, sehen diese automatisch dein Profilbild.</p>
-  </li>
-  <li>
-    <p>Aus Datenschutzgründen sieht niemand dein Profilbild, dem du nicht zuvor eine Nachricht gesendet hast.</p>
-  </li>
-</ul>
+<p>Du kannst ein Profilbild in den Einstellungen hinzufügen. Wenn du deinen Kontakten eine Nachricht sendest oder sie über einen QR-Code hinzufügst, sehen diese automatisch dein Profilbild.</p>
+
+<p>Aus Datenschutzgründen sieht niemand dein Profilbild, dem du nicht zuvor eine Nachricht gesendet hast.</p>
     
       <h3 id="signature">
         
@@ -287,20 +281,20 @@ Sobald du eine Nachricht an einen Kontakt sendest, kann dieser deine Signatur in
 
 <ul>
   <li>
-    <p><strong>Angeheftete Chats</strong> bleiben immer ganz oben in der Chatliste. So kannst du schnell auf deine Lieblingschats zugreifen oder du verwendest vorübergehend angeheftete Chats um Dinge nicht zu vergessen.</p>
+    <p><strong>Angeheftete Chats</strong> bleiben immer ganz oben in der Chatliste. So kannst du schnell auf deine Lieblingschats zugreifen oder du verwendest vorübergehend angeheftete Chats, um Dinge nicht zu vergessen.</p>
   </li>
   <li>
     <p><strong>Stummgeschaltete Chats</strong> erhalten keine Benachrichtigungen, bleiben ansonsten aber an ihrem Platz. Du kannst auch stummgeschaltete Chats anheften.</p>
   </li>
   <li>
-    <p><strong>Archiviere Chats</strong>, wenn du diese nicht mehr in deiner Chatliste sehen möchtest. Archivierte Chats bleiben oberhalb der Chatliste oder über die Suche zugänglich.</p>
+    <p><strong>Archiviere Chats</strong>, wenn du diese nicht mehr in deiner Chatliste sehen möchtest; sie bleiben oberhalb der Chatliste oder über die Suche zugänglich und werden als <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Archiviert</b> gekennzeichnet</p>
   </li>
   <li>
     <p>Wenn ein archivierter Chat eine neue Nachricht erhält, wird er, sofern er nicht stummgeschaltet ist, <strong>wieder in die normale Chatliste verschoben</strong>.  <strong>Stummgeschaltete Chats bleiben archiviert</strong>, bis du sie manuell aus dem Archiv entfernst.</p>
   </li>
 </ul>
 
-<p>Um die Funktionen zu nutzen, lang auf einen Chat in der Chatliste tippen oder den Chat mit der rechten Maustaste anklicken.</p>
+<p>Um die Funktionen zu nutzen, tippe lang auf einen Chat in der Chatliste oder klicke den Chat mit der rechten Maustaste an.</p>
     
       <h3 id="save">
         
@@ -310,11 +304,11 @@ Sobald du eine Nachricht an einen Kontakt sendest, kann dieser deine Signatur in
         
       </h3>
 
-<p><strong>Gespeicherte Nachrichten</strong> ist ein Chat, den du verwenden kannst, um dir Nachrichten zu merken und wiederzufinden.</p>
+<p><strong>Gespeicherte Nachrichten</strong> ist ein Chat, den du verwenden kannst, um dir Nachrichten zu merken und sie wiederzufinden.</p>
 
 <ul>
   <li>
-    <p>Tippen in einem beliebigen Chat lange auf eine Nachricht oder klicken mit der rechten Maustaste darauf und wähle <strong>Speichern</strong>.</p>
+    <p>Tippe im Chat lange auf eine Nachricht oder klicke mit der rechten Maustaste darauf und wähle <strong>Speichern</strong>.</p>
   </li>
   <li>
     <p>Gespeicherte Nachrichten werden mit dem Symbol
@@ -327,7 +321,7 @@ Durch Tippen auf <img style="vertical-align:middle; width:1.2em; margin:1px" src
 kannst du zu der ursprünglichen Nachricht im ursprünglichen Chat zurückkehren</p>
   </li>
   <li>
-    <p>Schließlich kannst du auch „Gespeicherte Nachrichten“ verwenden, um <strong>persönliche Notizen</strong> zu machen - öffnen den Chat, gib etwas ein, fügen ein Foto oder eine Sprachnachricht hinzu usw.</p>
+    <p>Schließlich kannst du auch „Gespeicherte Nachrichten“ verwenden, um <strong>persönliche Notizen</strong> zu machen. Öffne den Chat, gib etwas ein, fügen ein Foto oder eine Sprachnachricht hinzu usw.</p>
   </li>
   <li>
     <p>Da „Gespeicherte Nachrichten“ synchronisiert werden, können sie sehr praktisch für die Übertragung von Daten zwischen Geräten sein</p>
@@ -359,18 +353,16 @@ sei es durch den <a href="#edit">Absender</a>, durch <a href="#delold">Automatis
 
 <ul>
   <li>
-    <p><strong>Ein Häkchen</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" /> bedeutet, dass die Nachricht erfolgreich versandt wurde.</p>
+    <p><strong>Ein Häkchen</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" /> bedeutet, dass die Nachricht erfolgreich versandt wurde und das <a href="#relays">Relay</a> erreicht hat.</p>
   </li>
   <li>
-    <p><strong>Zwei Häkchen</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" /> bedeuten, dass mindestens ein Gerät des Empfängers zurückgemeldet hat, die Nachricht empfangen zu haben.</p>
-  </li>
-  <li>
-    <p>Lesebestätigungen können deaktiviert werden. D.h. auch wenn du nur ein Häkchen siehst, kann die Nachricht gelesen worden sein.</p>
-  </li>
-  <li>
-    <p>Umgekehrt bedeuten zwei Häkchen nicht automatisch, dass ein Mensch die Nachricht gelesen oder verstanden hat ;)</p>
+    <p><strong>Zwei Häkchen</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" /> bedeuten, dass der Empfänger die Nachricht gelesen hat.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">Gruppen</a> bedeutet das zweite Häkchen, dass die Nachricht von mindestens einem Mitglied gelesen wurde.</p>
+
+<p>Du erhältst nur dann das zweite Häkchen, wenn sowohl du als auch einer der Empfänger, die die Nachricht gelesen haben, <strong>Einstellungen → Chats → Lesebestätigungen</strong> aktiviert haben.</p>
     
       <h3 id="edit">
         
@@ -398,6 +390,31 @@ Es werden keine Benachrichtigungen verschickt und es gibt kein Zeitlimit.</p>
 <p>Beachten, dass die ursprüngliche Nachricht dennoch von Chatteilnehmern empfangen worden sein könnte,
 die die Nachricht bereits beantwortet, weitergeleitet, gespeichert, mit einem Screenshot versehen oder anderweitig kopiert haben könnten.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          Medienqualität und Datenverbrauch <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Bilder, Videos, Dateien, Sprachnachrichten und mehr können über die <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Anhang-</strong>
+  bzw. <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Sprachnachricht</strong>-Buttons hinzugefügt werden.</p>
+
+<ul>
+  <li>
+    <p>Standardmäßig sorgt Komprimierung für eine <strong>schnelle, effiziente Übertragung</strong>, die die Datenlimits und Speicherplatzkapazitäten aller Beteiligten berücksichtigt.
+Dies ist ideal für die tägliche Kommunikation.</p>
+  </li>
+  <li>
+    <p>In Regionen mit schlechter Verbindung können Sie unter <strong>Einstellungen → Chats →  Medienqualität beim Senden</strong> eine höhere Komprimierung wählen.</p>
+  </li>
+  <li>
+    <p>Wenn Sie Medien ausdrücklich in ihrer <strong>Originalqualität</strong> senden müssen, verwende im Chat die Option <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Anhängen → Datei</strong>.
+Verwende diese Methode nur sparsam, da das Senden von Originaldateien den Datenverbrauch für dich und alle Empfänger im Chat erheblich erhöht.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -430,15 +447,14 @@ oder auf andere Weise Nachrichten vor dem Löschen speichern, kopieren oder weit
       <h3 id="delold">
         
         
-          Was passiert, wenn ich “Alte Nachrichten vom Gerät löschen” aktiviere? <a href="#delold" class="anchor"></a>
+          Was passiert, wenn ich “Nachrichten vom Gerät löschen” aktiviere? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>Wenn du Speicherplatz auf deinem Gerät sparen möchtest, kannst du alte Nachrichten automatisch löschen lassen.</li>
-  <li>Hierzu, öffne die “Chats und Medien”-Einstellungen und dort “Alte Nachrichten vom Gerät löschen”. Du kannst einen Zeitraum zwischen “1 Stunde” und “1 Jahr” festlegen; auf diese Weise werden <em>alle</em> Nachrichten von deinem Gerät gelöscht, sobald sie älter als angegeben sind.</li>
-</ul>
+<p>Wenn du Speicherplatz auf deinem Gerät sparen möchtest, kannst du alte Nachrichten automatisch löschen lassen.</p>
+
+<p>Hierzu, öffne <strong>Einstellungen → Chats → Nachrichten vom Gerät löschen</strong>. Du kannst einen Zeitraum zwischen “1 Stunde” und “1 Jahr” festlegen; auf diese Weise werden alleNachrichten von deinem Gerät gelöscht, sobald sie älter als angegeben sind.</p>
     
       <h3 id="remove-account">
         
@@ -485,9 +501,15 @@ und seine <a href="#edit">eigenen Nachrichten von Geräten der Mitglieder lösch
       </h3>
 
 <ul>
-  <li>Wähle <strong>Neuer Chat</strong> und dann <strong>Neue Gruppe</strong> aus dem Menü oben rechts oder über das entsprechende Symbol unter Android/iOS.</li>
-  <li>Wähle auf dem folgenden Bildschirm die <strong>Gruppenmitglieder</strong> aus und klicke auf das Häkchen in der oberen rechten Ecke. Danach kannst du einen <strong>Gruppennamen</strong> und auch einen <strong>Gruppenbild</strong>  festlegen.</li>
-  <li>Sobald du die <strong>erste Nachricht</strong> in die Gruppe schreibst, werden alle Mitglieder über die neue Gruppe informiert und können in der Gruppe antworten (solange du keine Nachricht in die Gruppe schreibst, ist die Gruppe für die Gruppenmitglieder nicht sichtbar).</li>
+  <li>
+    <p>Wähle <strong>Neuer Chat</strong> und dann <strong>Neue Gruppe</strong> aus dem Menü oben rechts oder über das entsprechende Symbol unter Android/iOS.</p>
+  </li>
+  <li>
+    <p>Wähle auf dem folgenden Bildschirm die <strong>Gruppenmitglieder</strong> aus und klicke auf das Häkchen in der oberen rechten Ecke. Danach kannst du einen <strong>Gruppennamen</strong> und auch einen <strong>Gruppenbild</strong>  festlegen.</p>
+  </li>
+  <li>
+    <p>Sobald du die <strong>erste Nachricht</strong> in die Gruppe schreibst, werden alle Mitglieder über die neue Gruppe informiert und können in der Gruppe antworten (solange du keine Nachricht in die Gruppe schreibst, ist die Gruppe für die Gruppenmitglieder nicht sichtbar).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -498,10 +520,9 @@ und seine <a href="#edit">eigenen Nachrichten von Geräten der Mitglieder lösch
         
       </h3>
 
+<p>Alle Gruppenmitglieder haben <strong>dieselben Rechte</strong>. Jeder kann daher jeden löschen oder weitere Mitglieder hinzufügen.</p>
+
 <ul>
-  <li>
-    <p>Alle Gruppenmitglieder haben <strong>dieselben Rechte</strong>. Jeder kann daher jeden löschen oder weitere Mitglieder hinzufügen.</p>
-  </li>
   <li>
     <p>Um <strong>Mitglieder hinzuzufügen oder zu entfernen</strong>, tippe im Chat auf den Gruppennamen und wähle das Mitglied aus, das du hinzufügen oder entfernen möchtest.</p>
   </li>
@@ -509,7 +530,7 @@ und seine <a href="#edit">eigenen Nachrichten von Geräten der Mitglieder lösch
     <p>Wenn das Mitglied noch nicht in deiner Kontaktliste ist, sie sich aber <strong>persönlich</strong> treffen, wählen Sie dort <strong>QR-Einladungscode</strong> an. Dein Chat-Partner kann nun den QR-Code mit seiner Delta Chat-App <strong>scannen</strong> indem er auf <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> auf dem Hauptbildschirm tippt.</p>
   </li>
   <li>
-    <p>Für eine Kontaktaufnahme <strong>aus der Ferne</strong>, tippe dort “Kopieren” oder “Teilen” und sende den Einladungslink über einen anderen privaten Chat zum neuen Mitglied.</p>
+    <p>Für eine Kontaktaufnahme <strong>aus der Ferne</strong> tippe dort “Kopieren” oder “Teilen” und sende den Einladungslink über einen anderen privaten Chat zum neuen Mitglied.</p>
   </li>
 </ul>
 
@@ -523,10 +544,8 @@ und seine <a href="#edit">eigenen Nachrichten von Geräten der Mitglieder lösch
         
       </h3>
 
-<ul>
-  <li>Da du kein Gruppenmitglied mehr bist, kannst du sich selbst nicht mehr hinzufügen.
-Kein Problem, bitte einfach ein anderes Gruppenmitglied in einem normalen Chat, dich hinzuzufügen.</li>
-</ul>
+<p>Da du kein Gruppenmitglied mehr bist, kannst du sich selbst nicht mehr hinzufügen.
+Kein Problem, bitte einfach ein anderes Gruppenmitglied in einem normalen Chat, dich hinzuzufügen.</p>
     
       <h3 id="ich-möchte-keine-nachrichten-einer-gruppe-mehr-empfangen">
         
@@ -537,14 +556,11 @@ Kein Problem, bitte einfach ein anderes Gruppenmitglied in einem normalen Chat,
       </h3>
 
 <ul>
-  <li>
-    <p>Lösche dich entweder aus der Mitgliederliste oder lösche den gesamten Chat. 
-Wenn du der Gruppe später erneut beitreten möchtest, bitten ein anderes Gruppenmitglied, dich hinzuzufügen.</p>
-  </li>
-  <li>
-    <p>Alternativ kannst du eine Gruppe auch “stummschalten” - dies bedeutet, dass du weiterhin alle Nachrichten erhälst und neue schreiben kannst, aber nicht mehr über neue Nachrichten informiert wirst.</p>
-  </li>
+  <li>Lösche dich entweder aus der Mitgliederliste oder lösche den gesamten Chat. 
+Wenn du der Gruppe später erneut beitreten möchtest, bitten ein anderes Gruppenmitglied, dich hinzuzufügen.</li>
 </ul>
+
+<p>Alternativ kannst du eine Gruppe auch “stummschalten” - dies bedeutet, dass du weiterhin alle Nachrichten erhältst und neue schreiben kannst, aber nicht mehr über neue Nachrichten informiert wirst.</p>
     
       <h3 id="eine-gruppe-klonen">
         
@@ -570,6 +586,210 @@ oder klicken mit der rechten Maustaste auf die Gruppe in der Chat-Liste (Desktop
 <p>Die neue Gruppe ist <strong>völlig unabhängig</strong> von der ursprünglichen,
 die weiterhin wie bisher funktioniert.</p>
     
+      <h3 id="wie-viele-mitglieder-können-in-einer-einzelnen-gruppe-sein">
+        
+        
+          Wie viele Mitglieder können in einer einzelnen Gruppe sein? <a href="#wie-viele-mitglieder-können-in-einer-einzelnen-gruppe-sein" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Es gibt keine technische Begrenzung,
+aber mehr als 150 sind nicht empfohlen.</p>
+
+<p>Wenn Gruppen größer werden, können sie sozial instabil werden und benötigen möglicherweise eine Hierarchie - und Delta Chat ist ein privater Messenger für Chats mit <a href="#groups">gleichen Rechten</a>. Vgl. <a href="https://de.wikipedia.org/wiki/Dunbar-Zahl">Dunbar-Zahl</a>.</p>
+    
+      <h2 id="channels">
+        
+        
+          Kanäle <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Kanäle dienen der Verbreitung von Nachrichten an viele Empfänger.</p>
+    
+      <h3 id="einem-kanal-beitreten">
+        
+        
+          Einem Kanal beitreten <a href="#einem-kanal-beitreten" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="einen-kanal-erstellen">
+        
+        
+          Einen Kanal erstellen <a href="#einen-kanal-erstellen" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="wie-viele-empfänger-kann-ein-kanal-haben">
+        
+        
+          Wie viele Empfänger kann ein Kanal haben? <a href="#wie-viele-empfänger-kann-ein-kanal-haben" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Anrufe <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="jemanden-anrufen">
+        
+        
+          Jemanden anrufen <a href="#jemanden-anrufen" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="einen-anruf-annehmen-oder-ablehnen">
+        
+        
+          Einen Anruf annehmen oder ablehnen <a href="#einen-anruf-annehmen-oder-ablehnen" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="während-des-anrufs">
+        
+        
+          Während des Anrufs <a href="#während-des-anrufs" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="verpasste-anrufe-und-benachrichtigungen">
+        
+        
+          Verpasste Anrufe und Benachrichtigungen <a href="#verpasste-anrufe-und-benachrichtigungen" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -841,7 +1061,7 @@ Einschließlich dem Chatmail-Server, <a href="https://delta.chat/chatmail#selfho
     <p>Vergewissere dich, dass beide Geräte mit dem <strong>gleichen Wi-Fi, WLAN oder Netzwerk</strong> verbunden sind.</p>
   </li>
   <li>
-    <p>Unter <strong>Windows</strong>, <strong>Systemsteuerung / Netzwerk und Internet</strong> öffnen
+    <p>Unter <strong>Windows</strong>, “Systemsteuerung / Netzwerk und Internet” öffnen
 und sicherstellen, dass <strong>Privates Netzwerk</strong> als “Netzwerkprofiltyp” ausgewählt ist.
 (nach der Übertragung kann wieder der ursprüngliche Wert verwendet werden)</p>
   </li>
@@ -920,10 +1140,10 @@ Wenn du iOS verwendest und auf Schwierigkeiten stößt, hilft dir vielleicht <a
         
       </h2>
     
-      <h3 id="experimentelle-features">
+      <h3 id="experiments">
         
         
-          Experimentelle Features <a href="#experimentelle-features" class="anchor"></a>
+          Experimentelle Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -956,18 +1176,16 @@ kannst du jedoch unter <strong>Einstellungen → Erweitert → Relays</strong>
 
 <ul>
   <li>
-    <p>Du kannst ein Relay <strong>hinzufügen</strong>, indem du einen QR-Code scannst,
-z.B. von <a href="https://chatmail.at/relays">https://chatmail.at/relays</a>.
-Bei mehreren Relays, empfängst du die Nachrichten von allen Relays.</p>
+    <p>Du kannst ein Relay <strong>hinzufügen</strong>, indem du einen QR-Code scannst, z.B. von <a href="https://chatmail.at/relays">chatmail.at/relays</a>. Bei mehreren Relays, empfängst du die Nachrichten von allen Relays. Deine Kontakte lernen deine Relays automatisch, sobald du ihnen schreibst.</p>
   </li>
   <li>
-    <p><strong>Standard</strong> legt das Relay fest, an das deine Chatpartner zukünftig Nachrichten senden.</p>
+    <p>Tippe ein Relay an, um es <strong>Zum Senden zu verwenden</strong></p>
   </li>
   <li>
-    <p>Wenn du ein Relay <strong>entfernst</strong>,
-stelle sicher, dass ein anderes Standard-Relay ausreichend lange verwendet wurde.
-Andernfalls erreichen dich keine Nachrichten von deinen Kontakten.
-Im Zweifelsfall entferne das Relay später.</p>
+    <p>Wenn du ein Relay <strong>entfernst</strong>, können Kontakte, die nur dieses Relay kennen, dich nicht erreichen, bis du ihnen wieder schreibst. Um erreichbar zu bleiben,  wähle <strong>Vor Kontakten verstecken</strong> im Bestätigungsdialog anstelle das Relay direkt zu löschen.</p>
+  </li>
+  <li>
+    <p>Um ein verstecktes Relay wieder <strong>anzuzeigen</strong> tippe es an.</p>
   </li>
 </ul>
 
@@ -981,24 +1199,23 @@ Im Zweifelsfall entferne das Relay später.</p>
         
       </h3>
 
-<p>Yes, but only if the email address is used exclusively by <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p>Ja, aber nur, wenn die E-Mail-Adresse ausschließlich von <a href="https://chatmail.at/clients">Chatmail-Clients</a> verwendet wird.</p>
 
-<p>It is not supported to share usage of an email address with non-chatmail apps or web-based mailers,
-for the following reasons:</p>
+<p>Die gemeinsame Nutzung einer E-Mail-Adresse mit Nicht-Chatmail-Apps oder webbasierten Mailprogrammen wird aus folgenden Gründen nicht unterstützt:</p>
 
 <ul>
   <li>
-    <p>Non-chatmail apps are largely not accomplishing automatic end-to-end email encryption for their users,
-while chatmail apps and relays pervasively enforce end-to-end encryption and security standards.</p>
+    <p>Nicht-Chatmail-Apps bieten ihren Nutzern größtenteils keine automatische End-to-End-Verschlüsselung,
+während Chatmail-Apps und Relays durchgängig End-to-End-Verschlüsselung und Sicherheitsstandards durchsetzen.</p>
   </li>
   <li>
-    <p>Non-chatmail apps use email servers as a long-term message archive
-while chatmail clients use email servers for ephemeral instant message relay.</p>
+    <p>Nicht-Chatmail-Anwendungen nutzen E-Mail-Server als langfristiges Nachrichtenarchiv,
+während Chatmail-Clients E-Mail-Server für die kurzlebige Weiterleitung von Nachrichten verwenden.</p>
   </li>
   <li>
-    <p>Supporting the full variety of classic email setups
-would require considerable development and maintenance efforts,
-and complicate making chatmail-based messaging more resilient, reliable and fast.</p>
+    <p>Die Unterstützung der gesamten Bandbreite klassischer E-Mail-Konfigurationen
+würde einen erheblichen Entwicklungs- und Wartungsaufwand erfordern
+und Chatmail-basiertes Messaging weniger robust, zuverlässig und schnell machen.</p>
   </li>
 </ul>
     
@@ -1010,17 +1227,15 @@ and complicate making chatmail-based messaging more resilient, reliable and fast
         
       </h3>
 
-<p>First off, <strong>please do not use the same classic email address also from non-chatmail classic email apps</strong>
-unless you are prepared to deal with encrypted messages in the inbox,
-double notifications, accidentally deleted emails or similar annoyances.</p>
+<p>Zunächst einmal, <strong>verwenden bitte nicht dieselbe klassische E-Mail-Adresse auch in anderen klassischen E-Mail-Anwendungen</strong>,
+es sei denn, du bist sind bereit, dich mit verschlüsselten Nachrichten im Posteingang,
+doppelten Benachrichtigungen, versehentlich gelöschten E-Mails oder ähnlichen Ärgernissen auseinanderzusetzen.</p>
 
-<p>You can configure a email address for chatting at <strong>New Profile → Use Other Server → Use Classic Mail as Relay</strong>.
-Note that classic email providers will generally not support <a href="#instant-delivery">Push Notifications</a>
-and have other limitations, see <a href="https://providers.delta.chat">Provider Overview</a>.
-Chatmail uses the default INBOX for relay; ensure the provider setup does too. 
-A chat profile using a classic email address allows to to send and receive unencrypted messages.
-These messages, and the chats they appear in, are marked with an email icon
-<img style="vertical-align:middle; width:1.2em; margin:1px" src="../email-icon.png" alt="email" />.</p>
+<p>Sie können eine E-Mail-Adresse unter <strong>Neues Profil → Anderen Server verwenden → Klassische E-Mail als Relay</strong> konfigurieren.
+Beachten Sie, dass klassische E-Mail-Anbieter in der Regel keine <a href="#instant-delivery">Push-Benachrichtigungen</a> unterstützen
+und andere Einschränkungen haben, siehe <a href="https://providers.delta.chat">Provider-Overview</a>.
+Chatmail verwendet den Standard-INBOX für die Weiterleitung; stellen Sie sicher, dass dies auch bei der Einrichtung Ihres Anbieters der Fall ist. 
+Ein Chat-Profil mit klassischer E-Mail-Adresse, ermöglicht das Senden und Empfangen unverschlüsselter Nachrichten; diese sind mit dem E-Mail-Symbol <img style="vertical-align:middle; width:1.2em; margin:1px" src="../email-icon.png" alt="email" />  gekennzeichnet.</p>
     
       <h3 id="ich-möchte-meinen-eigenen-server-für-delta-chat-verwalten-gibt-es-empfehlungen">
         
@@ -1030,13 +1245,13 @@ These messages, and the chats they appear in, are marked with an email icon
         
       </h3>
 
-<p>Any well behaving email server setup will do fine 
-except if your users’ devices require Google/Apple <a href="#instant-delivery">Push Notifications</a> to work properly.</p>
+<p>Jede gut funktionierende E-Mail-Server-Konfiguration ist geeignet, 
+es sei denn, die Geräte Ihrer Benutzer erfordern Google/Apple <a href="#instant-delivery">Push-Benachrichtigungen</a>, um ordnungsgemäß zu funktionieren.</p>
 
-<p>We generally recommend to <a href="https://chatmail.at/doc/relay/getting_started.html">set up a chatmail relay</a>. 
-<a href="https://chatmail.at">Chatmail</a> is a community-driven project that encompasses both the setup of relays
-and <a href="https://github.com/chatmail/core">core Rust developments</a> 
-that power <a href="https://chatmail.at/clients">chatmail clients</a> of which Delta Chat is the most well known.</p>
+<p>Wir empfehlen generell, <a href="https://chatmail.at/doc/relay/getting_started.html">ein Chatmail-Relay einzurichten</a>. 
+<a href="https://chatmail.at">Chatmail</a> ist ein Community-basiertes Projekt, das sowohl die Einrichtung von Relays
+als auch <a href="https://github.com/chatmail/core">Entwicklungen in Rust</a> 
+für die <a href="https://chatmail.at/clients">Chatmail-Clients</a> umfasst, von denen Delta Chat der bekannteste ist.</p>
     
       <h3 id="statssending">
         
@@ -1046,31 +1261,31 @@ that power <a href="https://chatmail.at/clients">chatmail clients</a> of which D
         
       </h3>
 
-<p>We would like to improve Delta Chat with your help,
-which is why Delta Chat for Android asks whether you want
-to send anonymous usage statistics.</p>
+<p>Wir möchten Delta Chat mit deiner Hilfe verbessern.
+Deshalb fragt Delta Chat für Android, ob du
+anonyme Nutzungsstatistiken senden möchtest.</p>
 
-<p>You can turn it on and off at
-<strong>Settings → Advanced → Send statistics to Delta Chat’s developers</strong>.</p>
+<p>Du kannst dies unter
+<strong>Einstellungen → Erweitert → Statistik an Delta Chat Entwickler senden</strong> ein- und ausschalten.</p>
 
-<p>When you turn it on,
-weekly statistics will be automatically sent to a bot.</p>
+<p>Wenn eingeschaltet,
+werden wöchentlich Statistiken automatisch an einen Bot gesendet.</p>
 
-<p>We are interested e.g. in statistics like:</p>
+<p>Wir sind beispielsweise an folgenden Statistiken interessiert:</p>
 
 <ul>
   <li>
-    <p>How many contacts are introduced by personally scanning a QR code?</p>
+    <p>Wie viele Kontakte werden durch das persönliche Scannen eines QR-Codes hergestellt?</p>
   </li>
   <li>
-    <p>Which versions of Delta Chat are being used?</p>
+    <p>Welche Versionen von Delta Chat werden verwendet?</p>
   </li>
   <li>
-    <p>What errors occur for users?</p>
+    <p>Welche Fehler treten bei Benutzern auf?</p>
   </li>
 </ul>
 
-<p>We will <em>not</em> collect any personally identifiable information about you.</p>
+<p>Wir werden <em>keinerlei</em> personenbezogene Daten über dich sammeln.</p>
     
       <h3 id="ich-bin-an-technischen-details-interessiert-gibt-es-hierzu-weitere-infos">
         
@@ -1080,9 +1295,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Siehe hierzu <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">in Delta Chat genutzte Standards</a>.</li>
-</ul>
+<p>Siehe hierzu <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">in Delta Chat genutzte Standards</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1110,6 +1323,10 @@ zum Austausch von Verschlüsselungsinformationen durch Scannen von QR-Codes oder
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> wird verwendet, um automatisch eine Ende-zu-Ende-Verschlüsselung zwischen Kontakten und allen Mitgliedern einer Gruppe herzustellen.</p>
   </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, dessen vollständige Implementierung für 2026 geplant ist, 
+wir post-quantum-resistente Verschlüsselung und Forward Secrecy einführen.</p>
+  </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Teilen eines Kontakts im Chat</a>
 ermöglicht es den Empfängern, eine Ende-zu-Ende-Verschlüsselung mit dem Kontakt zu verwenden.</p>
@@ -1149,16 +1366,15 @@ Seit der Veröffentlichung von Delta Chat Version 2 (Juli 2025) gibt es keine Sc
         
       </h3>
 
-<p>A contact profile might show a green checkmark
+<p>Ein Kontaktprofile kann ein grünes Häkchen 
 <img style="vertical-align:middle; width:1.5em; margin:1px" src="../green-checkmark.png" alt="green checkmark" />
-and an “Introduced by” line.
-Every green-checkmarked contact either did a direct <a href="#howtoe2ee">QR-scan</a> with you
-or was introduced by a another green-checkmarked contact.
-Introductions happen automatically when adding members to groups. 
-Whoever adds a green-checkmarked contact to a group with only green-checkmarked members 
-becomes an introducer. 
-In a contact profile you can tap on the “Introduced by …” text repeatedly
-until you get to the one with whom you directly did a <a href="#howtoe2ee">QR-scan</a>.</p>
+und “Eingeführt von” enthalten. 
+Jeder so markierte Kontakt hat entweder einen direkten <a href="#howtoe2ee">QR-Scan</a> mit Ihnen durchgeführt
+oder wurde von einem anderen Kontakt mit grünem Häkchen eingeführt.
+Das Einführen geschieht automatisch, wenn Sie Mitglieder zu Gruppen hinzufügen. 
+Wer einen Kontakt mit grünem Häkchen zu einer Gruppe hinzufügt, wird zum Einführenden.
+In einem Kontaktprofil können Sie wiederholt auf den Text “Eingeführt von” tippen
+bis Sie zu demjenigen gelangen, mit dem Sie einen direkten <a href="#howtoe2ee">QR-Scan</a> gemacht haben.</p>
 
 <p>Für eine ausführlichere Diskussion der “Garantierten Ende-zu-Ende-Verschlüsselung”,
 siehe <a href="https://securejoin.delta.chat/en/latest/new.html">Secure-Join-Protokolle</a>
@@ -1284,15 +1500,13 @@ selbst wenn die Nachricht nicht Ende-zu-Ende-verschlüsselt war.</p>
 speichern Delta-Chat-Apps keine Metadaten über Kontakte oder Gruppen auf Servern. Auch nicht in verschlüsselter Form. 
 Stattdessen werden alle Gruppen-Metadaten durchgängig verschlüsselt und ausschließlich auf den Endgeräten der Nutzer gespeichert.</p>
 
-<p>Servers can therefore only see:</p>
+<p>Server können daher nur das folgende sehen:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Absender- und Empfängeradressen, standardmäßig zufällig generiert</li>
+  <li>Größe der Nachricht</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>Alle anderen Metadaten zu Nachrichten, Kontakten und Gruppen befinden sich im Ende-zu-Ende-verschlüsselten Teil der Nachrichten.</p>
     
       <h3 id="device-seizure">
@@ -1303,15 +1517,34 @@ Stattdessen werden alle Gruppen-Metadaten durchgängig verschlüsselt und aussch
         
       </h3>
 
-<p>Both for protecting against metadata-collecting servers 
-as well as against the threat of device seizure
-we recommend to use a <a href="https://chatmail.at/relays">chatmail relay</a>
-to create chat profiles using random addresses for transport. 
-Note that Delta Chat apps on all platforms support multiple profiles
-so you can easily use situation-specific profiles next to your “main” profile
-with the knowledge that all their data, along with all metadata, will be deleted.
-Moreover, if a device is seized then chat contacts using short-lived profiles
-can not be identified easily.</p>
+<p>Sowohl zum Schutz vor Servern, die Metadaten sammeln, 
+als auch als Schutz bei Beschlagnahmung von Geräten
+empfehlen wir die Verwendung eines <a href="https://chatmail.at/relays">Chatmail-Relays</a>,
+um Chat-Profile mit zufälligen Adressen für den Transport zu erstellen. 
+Beachte, dass Delta-Chat-Apps mehrere Profile unterstützen,
+sodass du neben deinem „Hauptprofil” ganz einfach situationsspezifische Profile verwenden kannst,
+mit der Gewissheit, dass alle Daten sowie alle Metadaten gelöscht werden.
+Darüber hinaus können Chat-Kontakte, die kurzlebige Profile verwenden,
+im Falle einer Beschlagnahmung des Geräts nicht ohne Weiteres identifiziert werden.</p>
+    
+      <h3 id="wer-sieht-meine-ip-adresse">
+        
+        
+          Wer sieht meine IP-Adresse? <a href="#wer-sieht-meine-ip-adresse" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Die verwendeten <a href="#relays">Relays</a> müssen deine IP-Adresse kennen,
+sowie manchmal auch die Geräte deiner Kontakte, wenn du einen <a href="#calls">Anruf</a> tätigst
+oder ihr gemeinsam <a href="#webxdc">Apps</a> verwendet.</p>
+
+<p>IP-Adressen sind für Verbindungen und für Effizienz erforderlich.
+Sie werden von Delta Chat weder gespeichert noch offengelegt.
+IP-Adressen sind nicht mit einer Adresse, die du einem Lieferdienst gibst, vergleichbar - sondern viel gröber und oft nur die Stadt oder die Region beschreibend.</p>
+
+<p>Wenn du deine IP-Adresse als Risiko betrachtest, empfehlen wir, ein VPN für das gesamte System zu verwenden.
+Einstellungen auf App-Ebene hinterlassen Lücken überall im  System. Wenn man beispielsweise auf einen Link tippt, können IP-Adressen an Unbekannte weitergegeben werden, was bei weitem das größere Risiko darstellt</p>
     
       <h3 id="sealedsender">
         
@@ -1321,18 +1554,17 @@ can not be identified easily.</p>
         
       </h3>
 
-<p>Nein, noch nichts.</p>
+<p>Nein, noch nicht.</p>
 
 <p>Der Signal-Messenger führte 2018 <a href="https://signal.org/blog/sealed-sender/">“Sealed Sender”</a> ein
 um seine Serverinfrastruktur darüber im Unklaren zu lassen, wer eine Nachricht an eine Gruppe von Empfängern sendet. 
 Dies ist besonders wichtig, weil der Signal-Server die Handynummer jedes Kontos kennt,
 die in der Regel mit einer Passidentität verbunden ist.</p>
 
-<p>Even if <a href="https://chatmail.at/relays">chatmail relays</a> 
-do not ask for any private data (including no phone numbers), 
-it might still be worthwhile to protect relational metadata between addresses. 
-We don’t foresee bigger problems in using random throw-away addresses for sealed sending
-but an implementation has not been agreed as a priority yet.</p>
+<p>Auch wenn <a href="https://chatmail.at/relays">Chatmail-Relays</a> 
+keine privaten Daten (einschließlich Telefonnummern) abfragen, 
+könnte es dennoch sinnvoll sein, Metadaten zwischen Adressen zu schützen. 
+Wir sehen keine größeren Probleme bei der Verwendung von zufälligen Wegwerfadressen für aber eine Umsetzung wurde noch nicht als priorisiert.</p>
     
       <h3 id="pfs">
         
@@ -1342,23 +1574,20 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>Nein, noch nichts.</p>
+<p>Noch nicht, aber es kommt mit <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
-This means that if your private decryption key is leaked,
-and someone has collected your prior in-transit messages,
-they will be able to decrypt and read them using the leaked decryption key.
-Note that Forward Secrecy only increases security if you delete messages. 
-Otherwise, someone obtaining your decryption keys
-is typically also able to get all your non-deleted messages
-and doesn’t even need to decrypt any previously collected messages.</p>
+<p>Delta Chat unterstützt derzeit keine Perfect Forward Secrecy (PFS).
+Das bedeutet, dass, wenn Ihr privater Schlüssel offengelegt wird
+und jemand Ihre früheren Nachrichten während der Übertragung gesammelt hat,
+diese mit dem offengelegten Schlüssel entschlüsselt und gelesen werden können.
+Beachten Sie, dass Forward Secrecy die Sicherheit nur erhöht, wenn du Nachrichten löschst. 
+Andernfalls kann jemand, der deinen Schlüssel erhält,
+in der Regel auch alle deine nicht gelöschten Nachrichten abrufen
+und muss zuvor gesammelte Nachrichten nicht einmal entschlüsseln.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, dessen vollständige Implementierung für 2026 geplant ist,
+wird durch automatische Schlüsselrotation eine zuverlässige Löschung (Forward Secrecy) gewährleisten.
+Dieser Ansatz ist im Entwurf <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> festgelegt.</p>
     
       <h3 id="pqc">
         
@@ -1368,11 +1597,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>Nein, noch nichts.</p>
+<p>Noch nicht, aber es kommt mit <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat verwendet die Rust OpenPGP-Bibliothek <a href="https://github.com/rpgp/rpgp">rPGP</a>
-die den neuesten <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP Entwurf</a> unterstützt. 
-Wir beabsichtigen, PQC-Unterstützung zum <a href="https://github.com/chatmail/core">chatmail core</a> hinzuzufügen, sobald der Entwurf bei der IETF in Zusammenarbeit mit anderen OpenPGP-Implementierern fertiggestellt ist.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, dessen vollständige Implementierung für 2026 geplant ist,
+wird eine post-quantum-resistente Verschlüsselung zum Schutz vor Angriffen durch Quantencomputer bieten.
+Delta Chat verwendet die Rust-OpenPGP-Bibliothek <a href="https://github.com/rpgp/rpgp">rPGP</a>,
+die den neuesten <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Kryptografie OpenPGP Entfurf</a> unterstützt.
+Die Implementierung ist in <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> festgelegt.</p>
     
       <h3 id="wie-kann-ich-die-verschlüsselung-manuell-überprüfen">
         
@@ -1398,12 +1629,11 @@ ist die Verbindung sicher.</p>
 
 <p>Nein.</p>
 
-<p>Delta Chat generates secure OpenPGP keys according to the Autocrypt specification 1.1.
-We do not recommend or offer users to perform manual key management.
-We want to ensure that security audits can focus on a few proven cryptographic algorithms
-instead of the full breadth of possible algorithms allowed with OpenPGP.
-If you want to extract your OpenPGP key, there only is an expert method:
-you need to look it up in the “keypairs” SQLite table of a profile backup tar-file.</p>
+<p>Delta Chat generiert sichere OpenPGP-Schlüssel gemäß der Autocrypt-Spezifikation 1.1.
+Wir bieten Benutzern keine manuelle Schlüsselverwaltung an, noch empfehlen diese.
+Wir wollen sicherstellen, dass sich Sicherheitsüberprüfungen auf einige wenige bewährte kryptografische Algorithmen konzentrieren können,
+anstatt auf die gesamte Bandbreite der mit OpenPGP zulässigen Algorithmen.
+Wenn Sie Ihren OpenPGP-Schlüssel extrahieren möchten, gibt es nur eine Methode für Experten: Sie müssen ihn in der SQLite-Tabelle „keypairs” des Backups nachschlagen.</p>
     
       <h3 id="security-audits">
         
@@ -1437,7 +1667,7 @@ Weitere Informationen findest du in unserem Blogbeitrag über <a href="https://d
     <p>Im April 2023 haben wir Sicherheits- und Datenschutzprobleme mit dem “In Chats geteilten Apps”-Feature behoben, die mit Fehlern beim Sandboxing, insbesondere mit Chromium zusammenhängen. Wir haben daraufhin eine unabhängige Sicherheitsprüfung von Cure53 durchführen lassen, und alle gefundenen Probleme wurden mit den im April 2023 veröffentlichten 1.36 Releases behoben. Siehe <a href="https://delta.chat/en/2023-05-22-webxdc-security">hier für die vollständige Hintergrundgeschichte</a>.</p>
   </li>
   <li>
-    <p>Im März 2023 analysierte <a href="https://cure53.de">Cure53</a> sowohl die Transportverschlüsselung von Delta Chats Netzwerkverbindungen als auch das reproduzierbare Mailserver-Setup wie <a href="https://delta.chat/de/serverguide">auf dieser Seite empfohlen</a>. Du kannst mehr über das Audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">in unserem Blog</a> lesen oder du liest den <a href="https://delta.chat/assets/blog/MER-01-report.pdf">vollständigen Bericht hier</a>.</p>
+    <p>Im März 2023 analysierte <a href="https://cure53.de">Cure53</a> sowohl die Transportverschlüsselung von Delta Chats Netzwerkverbindungen als auch das reproduzierbare Mailserver-Setup wie <a href="https://delta.chat/serverguide">auf dieser Seite empfohlen</a>. Du kannst mehr über das Audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">in unserem Blog</a> lesen oder du liest den <a href="https://delta.chat/assets/blog/MER-01-report.pdf">vollständigen Bericht hier</a>.</p>
   </li>
   <li>
     <p>Im Jahr 2020 analysierte <a href="https://includesecurity.com">Include Security</a> Delta Chats Rust <a href="https://github.com/deltachat/deltachat-core-rust/">core</a>, <a href="https://github.com/async-email/async-imap">IMAP</a>,<a href="https://github.com/async-email/async-smtp">SMTP</a>, und <a href="https://github.com/async-email/async-native-tls">TLS</a> Bibliotheken.
@@ -1465,10 +1695,10 @@ Es wurden keine kritischen Probleme gefunden, aber zwei Probleme mit hohem Schwe
         
       </h3>
 
-<p>Some features require certain permissions,
-e.g. you need to grant camera permission if you want to <a href="#howtoe2ee">scan an invite QR code</a>.</p>
+<p>Einige Features erfordern bestimmte Berechtigungen.
+So muss z.B. der Kamerazugriff gewährt werden, wenn du einen <a href="#howtoe2ee">QR-Code scannen</a> möchtest.</p>
 
-<p>See <a href="https://delta.chat/en/gdpr#24-app-permissions">Privacy Policy</a> for a detailed overview.</p>
+<p>Siehe <a href="https://delta.chat/de/gdpr#24-berechtigungen-der-app">Datenschutzhinweise</a> für eine detaillierte Übersicht.</p>
     
       <h3 id="wo-können-meine-freunde-delta-chat-finden">
         
@@ -1512,29 +1742,6 @@ Wir nutzen vielmehr öffentliche Finanzierungsquellen, die bisher aus der EU und
 <p>Konkret wurden die Delta-Chat-Entwicklungen bisher aus diesen Quellen finanziert:</p>
 
 <ul>
-  <li>
-    <p>Das EU-Projekt <a href="https://nextleap.eu">NEXTLEAP</a> finanzierte 2017 und 2018 die Entwicklung und Implementierung von “Verifizierten Gruppen” und “Setup Kontakt” und half auch bei der Integration der Ende-zu-Ende-Verschlüsselung durch <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p>Der <a href="https://opentechfund.org">Open Technology Fund</a> hat Delta Chat erstmals 2018/2019 bezuschusst; mit dieser Förderung (~$200K) wurden hauptsächlich die Android-App verbessert sowie das Release der Desktop-App in einer Betaversion ermöglicht. Basierend auf Nutzererfahrungen im Menschenrechtskontext wurden zudem verschiedene Funktionen entwickelt, siehe unseren Bericht <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-Die zweite Förderung 2019/2020 (~$300K) half uns bei der  Erstellung der iOS-Version, unsere Kernbibliothek in die Programmiersprache “Rust” zu konvertieren und neue Funktionen für alle Plattformen bereitzustellen.</p>
-  </li>
-  <li>
-    <p>Die <a href="https://nlnet.nl/">NLnet-Stiftung</a> bewilligte 2019/2020 46K  EUR für die Fertigstellung von Rust-/Python-Bindungs und die Einrichtung eines Chat-Bot-Ökosystems.</p>
-  </li>
-  <li>
-    <p>Im Jahr 2021 erhielten wir weitere EU-Mittel für zwei “Next-Generation-Internet”-Anträge, nämlich für <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - E-Mail-Provider-Portabilitätsverzeichnis</a> (~97K EUR) und <a href="https://nlnet.nl/project/EmailPorting/">AEAP - E-Mail-Adressportierung</a> (~90K EUR). Ziel sind bessere Unterstützung von Mehrfachkonten, verbesserten QR-Code-Kontakt- und -Gruppen-Setups sowie Netzwerkverbesserungen auf allen Plattformen.</p>
-  </li>
-  <li>
-    <p>Von Ende 2021 bis März 2023 erhielten wir eine <em>Internet-Freedom</em>-Finanzierung (500K USD) vom U.S. Bureau of Democracy, Human Rights and Labor (DRL). Diese Finanzierung unterstützte unsere langjährigen Ziele, Delta Chat benutzerfreundlicher und kompatibel mit einer breiten Palette von E-Mail-Servern weltweit zu machen, sowie widerstandsfähiger und sicherer an Orten, die häufig von Internetzensur und Abschaltungen betroffen sind.</p>
-  </li>
-  <li>
-    <p>2023-2024 schlossen wir erfolgreich das vom OTF finanzierte 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure-Chatmail-Projekt</a> ab. 
-Dieses fügt “Garantierte Verschlüsselung”, 
-das <a href="https://delta.chat/chatmail">Chatmail-Server-Netzwerk</a> 
-und „Instant Onboarding“ allen ab April 2024 veröffentlichten Anwendungen hinzu.</p>
-  </li>
   <li>
     <p>2023 und 2024 wurden wir in das Next-Generation-Internet-Programm (NGI)
 für unsere Arbeit an <a href="https://nlnet.nl/project/WebXDC-Push/">Webxdc-PUSH</a> aufgenommen,
@@ -1545,6 +1752,19 @@ zusammen mit Kooperationspartnern, die an
 <a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
 Alle diese Projekte sind teilweise abgeschlossen oder sollen Anfang 2025 abgeschlossen werden.</p>
   </li>
+  <li>
+    <p>Im Jahr 2021 erhielten wir weitere EU-Mittel für zwei “Next-Generation-Internet”-Anträge, nämlich für <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - E-Mail-Provider-Portabilitätsverzeichnis</a> (~97K EUR) und <a href="https://nlnet.nl/project/EmailPorting/">AEAP - E-Mail-Adressportierung</a> (~90K EUR). Ziel sind bessere Unterstützung von Mehrfachkonten, verbesserten QR-Code-Kontakt- und -Gruppen-Setups sowie Netzwerkverbesserungen auf allen Plattformen.</p>
+  </li>
+  <li>
+    <p>Die <a href="https://nlnet.nl/">NLnet-Stiftung</a> bewilligte 2019/2020 46K  EUR für die Fertigstellung von Rust-/Python-Bindungs und die Einrichtung eines Chat-Bot-Ökosystems.</p>
+  </li>
+  <li>
+    <p>Der <a href="https://opentechfund.org">Open Technology Fund</a> hat Delta Chat erstmals 2018/2019 bezuschusst; mit dieser Förderung (~$200K) wurden hauptsächlich die Android-App verbessert sowie das Release der Desktop-App in einer Betaversion ermöglicht. Basierend auf Nutzererfahrungen im Menschenrechtskontext wurden zudem verschiedene Funktionen entwickelt, siehe unseren Bericht <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+Die zweite Förderung 2019/2020 (~$300K) half uns bei der  Erstellung der iOS-Version, unsere Kernbibliothek in die Programmiersprache “Rust” zu konvertieren und neue Funktionen für alle Plattformen bereitzustellen.</p>
+  </li>
+  <li>
+    <p>Das EU-Projekt <a href="https://nextleap.eu">NEXTLEAP</a> finanzierte 2017 und 2018 die Entwicklung und Implementierung von “Verifizierten Gruppen” und “Setup Kontakt” und half auch bei der Integration der Ende-zu-Ende-Verschlüsselung durch <a href="https://autocrypt.org">Autocrypt</a>.</p>
+  </li>
   <li>
     <p>Manchmal erhalten wir einmalige Spenden von Privatpersonen, wofür wir sehr dankbar sind. Im Jahr 2021 hat uns zum Beispiel eine großzügige Privatperson 4000 EUR überwiesen mit dem Betreff “Weiter so!” 💜  Wir verwenden dieses Geld zur Finanzierung von Entwicklungstreffen oder zur Deckung von Ad-hoc-Ausgaben, die nicht ohne weiteres vorhersehbar sind oder nicht aus öffentlichen Fördermitteln erstattet werden können.
 Der Erhalt von Spenden hilft uns auch, unabhängiger und langfristig lebensfähig zu werden, als Gemeinschaft.</p>

src/main/assets/help/en/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#does-delta-chat-support-images-videos-and-other-attachments">Does Delta Chat support images, videos and other attachments?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#who-sees-my-profile-picture">Who sees my profile picture?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#what-does-the-green-dot-mean">What does the green dot mean?</a></li>
       <li><a href="#what-do-the-ticks-shown-beside-outgoing-messages-mean">What do the ticks shown beside outgoing messages mean?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
-      <li><a href="#delold">What happens if I turn on “Delete old messages from device”?</a></li>
+      <li><a href="#delold">What happens if I turn on “Delete Messages from Device”?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#i-have-deleted-myself-by-accident">I have deleted myself by accident.</a></li>
       <li><a href="#i-do-not-want-to-receive-the-messages-of-a-group-any-longer">I do not want to receive the messages of a group any longer.</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">How does Delta Chat protect metadata in messages?</a></li>
       <li><a href="#device-seizure">How to protect metadata and contacts when a device is seized?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="does-delta-chat-support-images-videos-and-other-attachments">
-        
-        
-          Does Delta Chat support images, videos and other attachments? <a href="#does-delta-chat-support-images-videos-and-other-attachments" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Yes. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>For performance, images are optimized and sent at a smaller size by default, but you can send it as a “file” to preserve the original.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>You can add a profile picture in your settings. If you write to your contacts
+<p>You can add a profile picture in your settings. If you write to your contacts
 or add them via QR code, they automatically see it as your profile picture.</p>
-  </li>
-  <li>
-    <p>For privacy reasons, no one sees your profile picture until you write a
+
+<p>For privacy reasons, no one sees your profile picture until you write a
 message to them.</p>
-  </li>
-</ul>
     
       <h3 id="signature">
         
@@ -305,7 +300,8 @@ they will see it when they view your contact details.</p>
   </li>
   <li>
     <p><strong>Archive chats</strong> if you do not want to see them in your chat list any longer.
-Archived chats remain accessible above the chat list or via search.</p>
+They remain accessible above the chat list or via search
+and are marked by <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Archived</b></p>
   </li>
   <li>
     <p>When an archived chat gets a new message, unless muted, it will <strong>pop out of the archive</strong> and back into your chat list.
@@ -340,7 +336,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -377,22 +373,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -421,6 +413,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -457,19 +475,18 @@ the (anyway encrypted) messages may take longer to get deleted from their server
       <h3 id="delold">
         
         
-          What happens if I turn on “Delete old messages from device”? <a href="#delold" class="anchor"></a>
+          What happens if I turn on “Delete Messages from Device”? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>If you want to save storage on your device, you can choose to delete old
-messages automatically.</li>
-  <li>To turn it on, go to “delete old messages from device” in the “Chats &amp; Media”
-settings. You can set a timeframe between “after an hour” and “after a year”;
+<p>If you want to save storage on your device, you can choose to delete old
+messages automatically.</p>
+
+<p>To turn it on, go to <strong>Settings → Chats → Delete Message from Device</strong>.
+You can set a timeframe between “after an hour” and “after a year”;
 this way, <em>all</em> messages will be deleted from your device as soon as they are
-older than that.</li>
-</ul>
+older than that.</p>
     
       <h3 id="remove-account">
         
@@ -517,9 +534,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Select <strong>New chat</strong> and then <strong>New group</strong> from the menu in the upper right corner or hit the corresponding button on Android/iOS.</li>
-  <li>On the following screen, select the <strong>group members</strong> and define a <strong>group name</strong>. You can also select a <strong>group avatar</strong>.</li>
-  <li>As soon as you write the <strong>first message</strong> in the group, all members are informed about the new group and can answer in the group (as long as you do not write a message in the group the group is invisible to the members).</li>
+  <li>
+    <p>Select <strong>New chat</strong> and then <strong>New group</strong> from the menu in the upper right corner or hit the corresponding button on Android/iOS.</p>
+  </li>
+  <li>
+    <p>On the following screen, select the <strong>group members</strong> and define a <strong>group name</strong>. You can also select a <strong>group avatar</strong>.</p>
+  </li>
+  <li>
+    <p>As soon as you write the <strong>first message</strong> in the group, all members are informed about the new group and can answer in the group (as long as you do not write a message in the group the group is invisible to the members).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -530,11 +553,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -562,10 +584,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>As you’re no longer a group member, you cannot add yourself again. 
-However, no problem, just ask any other group member in a normal chat to re-add you.</li>
-</ul>
+<p>As you’re no longer a group member, you cannot add yourself again. 
+However, no problem, just ask any other group member in a normal chat to re-add you.</p>
     
       <h3 id="i-do-not-want-to-receive-the-messages-of-a-group-any-longer">
         
@@ -576,15 +596,12 @@ However, no problem, just ask any other group member in a normal chat to re-add
       </h3>
 
 <ul>
-  <li>
-    <p>Either delete yourself from the member list or delete the whole chat. 
-If you want to join the group again later on, ask another group member to add you again.</p>
-  </li>
-  <li>
-    <p>As an alternative, you can also “Mute” a group - doing so means you get all messages and 
-can still write, but are no longer notified of any new messages.</p>
-  </li>
+  <li>Either delete yourself from the member list or delete the whole chat. 
+If you want to join the group again later on, ask another group member to add you again.</li>
 </ul>
+
+<p>As an alternative, you can also “Mute” a group - doing so means you get all messages and 
+can still write, but are no longer notified of any new messages.</p>
     
       <h3 id="cloning-a-group">
         
@@ -610,6 +627,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -898,7 +1121,7 @@ One device is not needed for the other to work.</p>
     <p>Double-check both devices are in the <strong>same Wi-Fi or network</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -993,10 +1216,10 @@ or the AppImage for Linux. You can find them on
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1026,22 +1249,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1155,9 +1382,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>See <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</li>
-</ul>
+<p>See <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1186,6 +1411,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1370,12 +1599,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1396,6 +1623,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1425,7 +1675,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1436,12 +1686,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1451,12 +1698,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1533,7 +1781,7 @@ See <a href="https://delta.chat/en/2023-05-22-webxdc-security">here for the full
   <li>
     <p>2023 March, <a href="https://cure53.de">Cure53</a> analyzed both the transport encryption of
 Delta Chat’s network connections and a reproducible mail server setup as
-<a href="https://delta.chat/en/serverguide">recommended on this site</a>.
+<a href="https://delta.chat/serverguide">recommended on this site</a>.
 You can read more about the audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">on our blog</a>
 or read the <a href="https://delta.chat/assets/blog/MER-01-report.pdf">full report here</a>.</p>
   </li>
@@ -1635,52 +1883,38 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a 
-first 2018/2019 grant (~$200K) during which we majorly improved the Android app 
-and released a first Desktop app beta version, and which moreover 
-moored our feature developments in UX research in human rights contexts, 
-see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-The second 2019/2020 grant (~$300K) helped us to 
-release Delta/iOS versions, to convert our core library to Rust, and
-to provide new features for all platforms.</p>
-  </li>
-  <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
   </li>
   <li>
     <p>In 2021 we received further EU funding for two Next-Generation-Internet
 proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
   </li>
   <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
+    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
+completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
   </li>
   <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
+    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a
+first 2018/2019 grant (~$200K) during which we majorly improved the Android app
+and released a first Desktop app beta version, and which moreover
+moored our feature developments in UX research in human rights contexts,
+see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+The second 2019/2020 grant (~$300K) helped us to
+release Delta/iOS versions, to convert our core library to Rust, and
+to provide new features for all platforms.</p>
   </li>
   <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
+and implementation of verified groups and setup contact protocols
+in 2017 and 2018 and also helped to integrate end-to-end Encryption
+through <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Sometimes we receive one-time donations from private individuals. 

src/main/assets/help/help.css

@@ -6,6 +6,10 @@ a {
   text-decoration: none;
 }
 
+a[href^='http']::after {
+    content: " ↗";
+}
+
 h2, h3, h4 {
   margin-top: 2rem;
 }

src/main/assets/help/id/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#apakah-delta-chat-mendukung-gambar-vidio-dan-lampiran-lainnya">Apakah Delta Chat mendukung gambar, vidio dan lampiran lainnya?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#siapa-yang-dapat-melihat-foto-profil-saya">Siapa yang dapat melihat Foto Profil saya?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#what-does-the-green-dot-mean">What does the green dot mean?</a></li>
       <li><a href="#what-do-the-ticks-shown-beside-outgoing-messages-mean">What do the ticks shown beside outgoing messages mean?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
-      <li><a href="#delold">What happens if I turn on “Delete old messages from device”?</a></li>
+      <li><a href="#delold">What happens if I turn on “Delete Messages from Device”?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#i-have-deleted-myself-by-accident">I have deleted myself by accident.</a></li>
       <li><a href="#i-do-not-want-to-receive-the-messages-of-a-group-any-longer">I do not want to receive the messages of a group any longer.</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">How does Delta Chat protect metadata in messages?</a></li>
       <li><a href="#device-seizure">How to protect metadata and contacts when a device is seized?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="apakah-delta-chat-mendukung-gambar-vidio-dan-lampiran-lainnya">
-        
-        
-          Apakah Delta Chat mendukung gambar, vidio dan lampiran lainnya? <a href="#apakah-delta-chat-mendukung-gambar-vidio-dan-lampiran-lainnya" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Yes. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>For performance, images are optimized and sent at a smaller size by default, but you can send it as a “file” to preserve the original.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Anda dapat menambahkan gambar profil di pengaturan Anda. Jika Anda menulis ke kontak Anda
-atau menambahkannya melalui kode QR, mereka secara otomatis melihatnya sebagai gambar profil Anda.</p>
-  </li>
-  <li>
-    <p>Untuk alasan kerahasiaan, tidak ada satupun yang dapat melihat Foto Profil anda hingga anda menulis
+<p>Anda dapat menambahkan gambar profil di pengaturan Anda. Jika Anda menulis ke kontak Anda
+  atau menambahkannya melalui kode QR, mereka secara otomatis melihatnya sebagai gambar profil Anda.</p>
+
+<p>Untuk alasan kerahasiaan, tidak ada satupun yang dapat melihat Foto Profil anda hingga anda menulis
 sebuah pesan kepada mereka.</p>
-  </li>
-</ul>
     
       <h3 id="signature">
         
@@ -305,7 +300,8 @@ they will see it when they view your contact details.</p>
   </li>
   <li>
     <p><strong>Archive chats</strong> if you do not want to see them in your chat list any longer.
-Archived chats remain accessible above the chat list or via search.</p>
+They remain accessible above the chat list or via search
+and are marked by <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Archived</b></p>
   </li>
   <li>
     <p>When an archived chat gets a new message, unless muted, it will <strong>pop out of the archive</strong> and back into your chat list.
@@ -340,7 +336,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -377,22 +373,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -421,6 +413,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -457,19 +475,18 @@ the (anyway encrypted) messages may take longer to get deleted from their server
       <h3 id="delold">
         
         
-          What happens if I turn on “Delete old messages from device”? <a href="#delold" class="anchor"></a>
+          What happens if I turn on “Delete Messages from Device”? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>If you want to save storage on your device, you can choose to delete old
-messages automatically.</li>
-  <li>To turn it on, go to “delete old messages from device” in the “Chats &amp; Media”
-settings. You can set a timeframe between “after an hour” and “after a year”;
+<p>If you want to save storage on your device, you can choose to delete old
+messages automatically.</p>
+
+<p>To turn it on, go to <strong>Settings → Chats → Delete Message from Device</strong>.
+You can set a timeframe between “after an hour” and “after a year”;
 this way, <em>all</em> messages will be deleted from your device as soon as they are
-older than that.</li>
-</ul>
+older than that.</p>
     
       <h3 id="remove-account">
         
@@ -517,9 +534,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Select <strong>New chat</strong> and then <strong>New group</strong> from the menu in the upper right corner or hit the corresponding button on Android/iOS.</li>
-  <li>On the following screen, select the <strong>group members</strong> and define a <strong>group name</strong>. You can also select a <strong>group avatar</strong>.</li>
-  <li>As soon as you write the <strong>first message</strong> in the group, all members are informed about the new group and can answer in the group (as long as you do not write a message in the group the group is invisible to the members).</li>
+  <li>
+    <p>Select <strong>New chat</strong> and then <strong>New group</strong> from the menu in the upper right corner or hit the corresponding button on Android/iOS.</p>
+  </li>
+  <li>
+    <p>On the following screen, select the <strong>group members</strong> and define a <strong>group name</strong>. You can also select a <strong>group avatar</strong>.</p>
+  </li>
+  <li>
+    <p>As soon as you write the <strong>first message</strong> in the group, all members are informed about the new group and can answer in the group (as long as you do not write a message in the group the group is invisible to the members).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -530,11 +553,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -562,10 +584,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>As you’re no longer a group member, you cannot add yourself again. 
-However, no problem, just ask any other group member in a normal chat to re-add you.</li>
-</ul>
+<p>As you’re no longer a group member, you cannot add yourself again. 
+However, no problem, just ask any other group member in a normal chat to re-add you.</p>
     
       <h3 id="i-do-not-want-to-receive-the-messages-of-a-group-any-longer">
         
@@ -576,15 +596,12 @@ However, no problem, just ask any other group member in a normal chat to re-add
       </h3>
 
 <ul>
-  <li>
-    <p>Either delete yourself from the member list or delete the whole chat. 
-If you want to join the group again later on, ask another group member to add you again.</p>
-  </li>
-  <li>
-    <p>As an alternative, you can also “Mute” a group - doing so means you get all messages and 
-can still write, but are no longer notified of any new messages.</p>
-  </li>
+  <li>Either delete yourself from the member list or delete the whole chat. 
+If you want to join the group again later on, ask another group member to add you again.</li>
 </ul>
+
+<p>As an alternative, you can also “Mute” a group - doing so means you get all messages and 
+can still write, but are no longer notified of any new messages.</p>
     
       <h3 id="cloning-a-group">
         
@@ -610,6 +627,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -898,7 +1121,7 @@ One device is not needed for the other to work.</p>
     <p>Double-check both devices are in the <strong>same Wi-Fi or network</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -993,10 +1216,10 @@ or the AppImage for Linux. You can find them on
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1026,22 +1249,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1155,9 +1382,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>See <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</li>
-</ul>
+<p>See <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standards used in Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1186,6 +1411,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1370,12 +1599,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1396,6 +1623,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1425,7 +1675,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1436,12 +1686,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1451,12 +1698,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1533,7 +1781,7 @@ See <a href="https://delta.chat/en/2023-05-22-webxdc-security">here for the full
   <li>
     <p>2023 March, <a href="https://cure53.de">Cure53</a> analyzed both the transport encryption of
 Delta Chat’s network connections and a reproducible mail server setup as
-<a href="https://delta.chat/id/serverguide">recommended on this site</a>.
+<a href="https://delta.chat/serverguide">recommended on this site</a>.
 You can read more about the audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">on our blog</a>
 or read the <a href="https://delta.chat/assets/blog/MER-01-report.pdf">full report here</a>.</p>
   </li>
@@ -1635,52 +1883,38 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a 
-first 2018/2019 grant (~$200K) during which we majorly improved the Android app 
-and released a first Desktop app beta version, and which moreover 
-moored our feature developments in UX research in human rights contexts, 
-see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-The second 2019/2020 grant (~$300K) helped us to 
-release Delta/iOS versions, to convert our core library to Rust, and
-to provide new features for all platforms.</p>
-  </li>
-  <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
   </li>
   <li>
     <p>In 2021 we received further EU funding for two Next-Generation-Internet
 proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
   </li>
   <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
+    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
+completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
   </li>
   <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
+    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a
+first 2018/2019 grant (~$200K) during which we majorly improved the Android app
+and released a first Desktop app beta version, and which moreover
+moored our feature developments in UX research in human rights contexts,
+see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+The second 2019/2020 grant (~$300K) helped us to
+release Delta/iOS versions, to convert our core library to Rust, and
+to provide new features for all platforms.</p>
   </li>
   <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
+and implementation of verified groups and setup contact protocols
+in 2017 and 2018 and also helped to integrate end-to-end Encryption
+through <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Terkadang kami menerima sumbangan satu kali dari perorangan. 

src/main/assets/help/it/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">Come posso trovare persone con cui chattare?</a></li>
       <li><a href="#perché-una-chat-è-contrassegnata-come-richiesta">Perché una chat è contrassegnata come “Richiesta”?</a></li>
       <li><a href="#come-posso-mettere-in-contatto-due-miei-amici">Come posso mettere in contatto due miei amici?</a></li>
-      <li><a href="#delta-chat-supporta-immagini-video-e-altri-allegati">Delta Chat supporta immagini, video e altri allegati?</a></li>
       <li><a href="#multiple-accounts">Cosa sono i profili? Come posso passare dall’uno all’altro?</a></li>
       <li><a href="#chi-vede-la-mia-immagine-del-profilo">Chi vede la mia immagine del profilo?</a></li>
       <li><a href="#signature">Posso impostare una Biografia/Stato con Delta Chat?</a></li>
@@ -14,6 +13,7 @@
       <li><a href="#cosa-significa-il-punto-verde">Cosa significa il punto verde?</a></li>
       <li><a href="#cosa-significano-i-segni-di-spunta-visualizzati-accanto-ai-messaggi-in-uscita">Cosa significano i segni di spunta visualizzati accanto ai messaggi in uscita?</a></li>
       <li><a href="#edit">Correggi gli errori e cancella i messaggi dopo averli inviati</a></li>
+      <li><a href="#mediaquality">Come viene gestita la qualità dei media?</a></li>
       <li><a href="#ephemeralmsgs">Come funzionano i messaggi a scomparsa?</a></li>
       <li><a href="#delold">Cosa succede se attivo “Elimina Messaggi dal Dispositivo”?</a></li>
       <li><a href="#remove-account">Come posso eliminare il mio profilo chat?</a></li>
@@ -26,6 +26,22 @@
       <li><a href="#mi-sono-cancellato-per-sbaglio">Mi sono cancellato per sbaglio.</a></li>
       <li><a href="#non-desidero-più-ricevere-i-messaggi-di-un-gruppo">Non desidero più ricevere i messaggi di un gruppo.</a></li>
       <li><a href="#clonazione-di-un-gruppo">Clonazione di un gruppo</a></li>
+      <li><a href="#quanti-membri-possono-partecipare-a-un-singolo-gruppo">Quanti membri possono partecipare a un singolo gruppo?</a></li>
+    </ul>
+  </li>
+  <li><a href="#canali">Canali</a>
+    <ul>
+      <li><a href="#iscriversi-a-un-canale">Iscriversi a un canale</a></li>
+      <li><a href="#creare-un-canale">Creare un canale</a></li>
+      <li><a href="#quanti-iscritti-può-avere-un-canale">Quanti iscritti può avere un canale?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Chiamate</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">Apps in chat</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#avanzato">Avanzato</a>
     <ul>
-      <li><a href="#funzionalità-sperimentali">Funzionalità Sperimentali</a></li>
+      <li><a href="#experiments">Funzionalità Sperimentali</a></li>
       <li><a href="#relays">Cosa sono i ripetitori?</a></li>
       <li><a href="#posso-usare-un-indirizzo-email-classico-con-delta-chat">Posso usare un indirizzo email classico con Delta Chat?</a></li>
       <li><a href="#classic-email">Come posso configurare un profilo chat con un indirizzo email classico come inoltro?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">I messaggi contrassegnati dall’icona della posta sono esposti su Internet?</a></li>
       <li><a href="#message-metadata">In che modo Delta Chat protegge i metadati nei messaggi?</a></li>
       <li><a href="#device-seizure">Come proteggere i metadati e contatti quando un dispositivo viene sequestrato?</a></li>
+      <li><a href="#chi-vede-il-mio-indirizzo-ip">Chi vede il mio Indirizzo IP?</a></li>
       <li><a href="#sealedsender">Delta Chat supporta “Mittente Sigillato”?</a></li>
       <li><a href="#pfs">Delta Chat supporta Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Delta Chat supporta la Crittografia Post-Quantistica?</a></li>
@@ -185,7 +202,7 @@ Se vi aggiungete a vicenda a <a href="#groups">gruppi</a>, la crittografia end-t
 <p>Essendo un messenger privato,
 solo gli amici e i familiari con cui <a href="#howtoe2ee">condividi il tuo codice QR o il link di invito</a> possono scriverti.</p>
 
-<p>I tuoi amici potrebbero condividere i tuoi contatti con altri amici; ciò apparirà come una <strong>richiesta</strong>.</p>
+<p>I tuoi amici potrebbero condividere i tuoi contatti con altri amici; ciò apparirà come una <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Richiesta</b></p>
 
 <ul>
   <li>
@@ -215,24 +232,6 @@ Puoi anche aggiungere un breve messaggio di presentazione.</p>
 <p>Il secondo contatto riceverà una <strong>scheda</strong>
 e potrà toccarla per iniziare a chattare con il primo contatto.</p>
     
-      <h3 id="delta-chat-supporta-immagini-video-e-altri-allegati">
-        
-        
-          Delta Chat supporta immagini, video e altri allegati? <a href="#delta-chat-supporta-immagini-video-e-altri-allegati" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Sì. Immagini, video, files, messaggi vocali ecc. possono essere inviati utilizzando <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Allegato-</strong>
-o <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> pulsanti <strong>Messaggio Vocale</strong></p>
-  </li>
-  <li>
-    <p>Per le prestazioni, le immagini sono ottimizzate e inviate in dimensioni inferiori per impostazione predefinita, ma è possibile inviarle come “file” per preservare l’originale.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +261,11 @@ o <strong>Cambiare Profili</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Puoi aggiungere un’immagine del profilo nelle tue impostazioni. Se scrivi ai tuoi contatti
+<p>Puoi aggiungere un’immagine del profilo nelle tue impostazioni. Se scrivi ai tuoi contatti
 o li aggiungi tramite codice QR, la vedranno automaticamente come immagine del tuo profilo.</p>
-  </li>
-  <li>
-    <p>Per motivi di privacy, nessuno vede la tua immagine del profilo finché non scrivi un
+
+<p>Per motivi di privacy, nessuno vede la tua immagine del profilo finché non scrivi un
 messaggio a loro.</p>
-  </li>
-</ul>
     
       <h3 id="signature">
         
@@ -304,8 +298,7 @@ lo vedrà quando visualizzerà i tuoi dati di contatto.</p>
     <p><strong>Silenzia chat</strong> se non vuoi ricevere notifiche da queste. Le chat silenziate restano al loro posto e puoi anche fissare una chat silenziata.</p>
   </li>
   <li>
-    <p><strong>Archivia chats</strong> se non vuoi più vederle nel tuo elenco chat.
-Le chat archiviate rimangono accessibili sopra l’elenco delle chat o tramite la ricerca.</p>
+    <p><strong>Archivia chats</strong> se non vuoi più vederle nel tuo elenco chat. Le chat archiviate rimangono accessibili sopra l’elenco delle chat o tramite la ricerca.</p>
   </li>
   <li>
     <p>Quando una chat archiviata riceve un nuovo messaggio, a meno che non sia silenziata, <strong>salterà fuori dall’archivio</strong> e tornerà nell’elenco delle chat.
@@ -377,23 +370,19 @@ e anche gli altri non sempre vedranno che sei “online”.</p>
 
 <ul>
   <li>
-    <p><strong>Un segno di spunta</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-significa che il messaggio è stato inviato correttamente al tuo fornitore.</p>
+    <p><strong>Una spunta</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
+significa che il messaggio è stato inviato correttamente al <a href="#relays">ripetitore</a>.</p>
   </li>
   <li>
-    <p><strong>Due spunte</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-significa che almeno il dispositivo di un destinatario
-ha segnalato di aver ricevuto il messaggio.</p>
-  </li>
-  <li>
-    <p>I destinatari potrebbero aver disattivato le conferme di lettura,
-quindi anche se vedi solo un segno di spunta, il messaggio potrebbe essere stato letto.</p>
-  </li>
-  <li>
-    <p>Al contrario, due spunte non significano automaticamente
-che un essere umano abbia letto o compreso il messaggio ;)</p>
+    <p><strong>Due spunte</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
+indica che il tuo contatto ha letto il messaggio.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">gruppi</a> il secondo segno di spunta significa che almeno un membro ha segnalato di aver letto il messaggio.</p>
+
+<p>Riceverai la seconda spunta solo se sia tu che uno dei destinatari che hanno letto il messaggio
+avete abilitato <strong>Impostazioni → Chat → Conferme di Lettura</strong>.</p>
     
       <h3 id="edit">
         
@@ -422,6 +411,32 @@ Non vengono inviate notifiche e non c’è limite di tempo.</p>
 <p>Nota che il messaggio originale potrebbe essere ancora sui dispositivi dei membri della chat
 che avrebbero già potuto rispondere, inoltrare, salvare, scattare una schermata o copiare il messaggio in altri modi.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          Come viene gestita la qualità dei media? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Immagini, video, files, messaggi vocali ecc. possono essere inviati utilizzando <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Allegato-</strong>
+o <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> pulsanti <strong>Messaggio Vocale</strong></p>
+
+<ul>
+  <li>
+    <p>Per impostazione predefinita, la compressione garantisce una <strong>consegna rapida ed efficiente</strong> che rispetta i limiti di dati e di spazio di archiviazione di tutti.
+Questa soluzione è ideale per la comunicazione quotidiana.</p>
+  </li>
+  <li>
+    <p>Nelle regioni con connettività peggiore,
+è possibile scegliere una compressione più elevata in <strong>Impostazioni → Chat → Qualità Media in Uscita</strong>.</p>
+  </li>
+  <li>
+    <p>Se hai bisogno di inviare i file multimediali nella loro <strong>qualità originale</strong>, usa <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Allega → File</strong> nella chat.
+Si prega di utilizzare questo metodo con parsimonia, poiché l’invio di file originali aumenterà significativamente il consumo di dati per te e per tutti i destinatari della chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -462,14 +477,9 @@ i messaggi (comunque crittografati) potrebbero richiedere più tempo per essere
         
       </h3>
 
-<ul>
-  <li>Se si desidera risparmiare spazio sul dispositivo, è possibile scegliere di eliminare i vecchi
-messaggi automaticamente.</li>
-  <li>Per attivarla, andare su “Elimina Messaggi dal Dispositivo” nelle impostazioni di “Chat e Media”.
-È possibile impostare un intervallo di tempo compreso tra “Dopo 1 ora” e “Dopo 1 anno”;
-in questo modo, <em>tutti</em> i messaggi saranno eliminati dal dispositivo non appena saranno
-più vecchi di quel periodo.</li>
-</ul>
+<p>Se si desidera risparmiare spazio sul dispositivo, è possibile scegliere di eliminare i vecchi messaggi automaticamente.</p>
+
+<p>Per attivarla, andare su “Elimina Messaggi dal Dispositivo” nelle impostazioni di “Chat e Media”. È possibile impostare un intervallo di tempo compreso tra “Dopo 1 ora” e “Dopo 1 anno”; in questo modo, <em>tutti</em> i messaggi saranno eliminati dal dispositivo non appena saranno più vecchi di quel periodo.</p>
     
       <h3 id="remove-account">
         
@@ -517,9 +527,15 @@ ed <a href="#edit">eliminare i propri messaggi</a> dai dispositivi di tutti i me
       </h3>
 
 <ul>
-  <li>Seleziona <strong>Nuova chat</strong> e poi <strong>Nuovo gruppo</strong> dal menu nell’angolo in alto a destra o premi il pulsante corrispondente su Android/iOS.</li>
-  <li>Nella schermata successiva, seleziona i <strong>membri del gruppo</strong> e definisci un <strong>nome del gruppo</strong>. Puoi anche selezionare un <strong>avatar di gruppo</strong>.</li>
-  <li>Non appena scrivi il <strong>primo messaggio</strong> nel gruppo, tutti i membri vengono informati del nuovo gruppo e possono rispondere nel gruppo (finché non scrivi un messaggio nel gruppo il gruppo è invisibile ai membri).</li>
+  <li>
+    <p>Seleziona <strong>Nuova chat</strong> e poi <strong>Nuovo gruppo</strong> dal menu nell’angolo in alto a destra o premi il pulsante corrispondente su Android/iOS.</p>
+  </li>
+  <li>
+    <p>Nella schermata successiva, seleziona i <strong>membri del gruppo</strong> e definisci un <strong>nome del gruppo</strong>. Puoi anche selezionare un <strong>avatar di gruppo</strong>.</p>
+  </li>
+  <li>
+    <p>Non appena scrivi il <strong>primo messaggio</strong> nel gruppo, tutti i membri vengono informati del nuovo gruppo e possono rispondere nel gruppo (finché non scrivi un messaggio nel gruppo il gruppo è invisibile ai membri).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -530,11 +546,10 @@ ed <a href="#edit">eliminare i propri messaggi</a> dai dispositivi di tutti i me
         
       </h3>
 
+<p>Tutti i membri del gruppo hanno gli <strong>stessi diritti</strong>.
+  Per questo motivo, tutti possono eliminare qualsiasi membro o aggiungerne di nuovi.</p>
+
 <ul>
-  <li>
-    <p>Tutti i membri del gruppo hanno gli <strong>stessi diritti</strong>.
-Per questo motivo, tutti possono eliminare qualsiasi membro o aggiungerne di nuovi.</p>
-  </li>
   <li>
     <p>Per <strong>aggiungere o eliminare membri</strong>, tocca il nome del gruppo nella chat e seleziona il membro da aggiungere o rimuovere.</p>
   </li>
@@ -562,10 +577,8 @@ Tuttavia, poiché i gruppi sono <a href="#groups">destinati a persone fidate</a>
         
       </h3>
 
-<ul>
-  <li>Poiché non sei più un membro del gruppo, non puoi aggiungerti di nuovo.
-Tuttavia, nessun problema, chiedi a qualsiasi altro membro del gruppo in una normale chat di aggiungerti nuovamente.</li>
-</ul>
+<p>Poiché non sei più un membro del gruppo, non puoi aggiungerti di nuovo.
+Tuttavia, nessun problema, chiedi a qualsiasi altro membro del gruppo in una normale chat di aggiungerti nuovamente.</p>
     
       <h3 id="non-desidero-più-ricevere-i-messaggi-di-un-gruppo">
         
@@ -576,15 +589,12 @@ Tuttavia, nessun problema, chiedi a qualsiasi altro membro del gruppo in una nor
       </h3>
 
 <ul>
-  <li>
-    <p>Elimina te stesso dall’elenco dei membri o elimina l’intera chat.
-Se vuoi unirti di nuovo al gruppo in un secondo momento, chiedi a un altro membro del gruppo di aggiungerti di nuovo.</p>
-  </li>
-  <li>
-    <p>In alternativa, puoi anche “Silenziare” un gruppo - così facendo riceverai tutti i messaggi e
-puoi ancora scrivere, ma non viene più notificato alcun nuovo messaggio.</p>
-  </li>
+  <li>Elimina te stesso dall’elenco dei membri o elimina l’intera chat.
+Se vuoi unirti di nuovo al gruppo in un secondo momento, chiedi a un altro membro del gruppo di aggiungerti di nuovo.</li>
 </ul>
+
+<p>In alternativa, puoi anche “Silenziare” un gruppo - così facendo riceverai tutti i messaggi e
+puoi ancora scrivere, ma non viene più notificato alcun nuovo messaggio.</p>
     
       <h3 id="clonazione-di-un-gruppo">
         
@@ -610,6 +620,211 @@ oppure fai clic con il pulsante destro del mouse sul gruppo nell’elenco delle
 <p>Il nuovo gruppo è <strong>completamente indipendente</strong> dall’originale,
 che continua a funzionare come prima.</p>
     
+      <h3 id="quanti-membri-possono-partecipare-a-un-singolo-gruppo">
+        
+        
+          Quanti membri possono partecipare a un singolo gruppo? <a href="#quanti-membri-possono-partecipare-a-un-singolo-gruppo" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Non esiste un limite tecnico preciso,
+ma non è consigliabile superare i 150.</p>
+
+<p>Man mano che i gruppi diventano più grandi, possono diventare socialmente instabili e potrebbero aver bisogno di una gerarchia,
+dove Delta Chat è un servizio di messaggistica privato per chattare con <a href="#groups">uguali diritti</a>.
+Vedi <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">numero di Dunbar</a> per ulteriori approfondimenti.</p>
+    
+      <h2 id="canali">
+        
+        
+          Canali <a href="#canali" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>I canali sono uno strumento da uno a molti per la trasmissione di messaggi.</p>
+    
+      <h3 id="iscriversi-a-un-canale">
+        
+        
+          Iscriversi a un canale <a href="#iscriversi-a-un-canale" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scansiona il <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>Codice QR</strong>
+oppure tocca il <strong>collegamento di invito</strong> che hai ricevuto dal proprietario del canale.</li>
+</ul>
+
+<p>Ecco fatto!
+Riceverai alcuni dei messaggi dalla cronologia del canale
+e, da quel momento in poi, tutti i nuovi messaggi dal canale.</p>
+
+<p><strong>Non preoccuparti,</strong> se non accade immediatamente.
+Non appena il proprietario del canale si connetterà, la tua richiesta di iscrizione verrà elaborata.</p>
+
+<p>Poiché tutti i Canali di Delta Chat sono privati ​​e decentralizzati,
+non esiste una funzione di ricerca pubblica.</p>
+
+<p>Gli altri iscritti al canale non vedranno che ti sei iscritto e non potranno inviarti messaggi.
+Il proprietario del canale, tuttavia, potrà inviarti messaggi.
+Inoltre, vedrà che hai letto un messaggio, a meno che tu non abbia disabilitato le conferme di lettura.</p>
+
+<p>Se non desideri condividere il tuo profilo principale,
+puoi anche creare un <a href="#multiple-accounts">profilo dedicato</a> per unirti a un canale.</p>
+    
+      <h3 id="creare-un-canale">
+        
+        
+          Creare un canale <a href="#creare-un-canale" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tocca <strong>Nuova Chat</strong> e scegli <strong>Nuovo Canale</strong>.</p>
+  </li>
+  <li>
+    <p>Inserisci un <strong>nome</strong>, imposta facoltativamente un’<strong>immagine</strong> e una <strong>descrizione</strong>, e fai clic sul pulsante <strong>Crea</strong>.</p>
+  </li>
+  <li>
+    <p>Ora puoi inviare e gestire i messaggi come di consueto.</p>
+  </li>
+  <li>
+    <p>Dal profilo del canale, <strong>condividi il codice QR o il collegamento di invito con altri</strong>.</p>
+  </li>
+</ul>
+
+<p>Gli iscritti riceveranno i tuoi messaggi,
+ma non potranno inviare messaggi nel tuo canale.
+Al momento dell’iscrizione, riceveranno <strong>alcuni degli ultimi messaggi della cronologia del canale</strong>.</p>
+
+<p>Accanto a ciascun messaggio puoi vedere il <strong>numero di visualizzazioni</strong>.
+Tieni presente che questo conteggio si riferisce solo agli abbonati che hanno attivato le conferme di lettura,
+quindi il numero reale di visualizzazioni potrebbe essere superiore.</p>
+    
+      <h3 id="quanti-iscritti-può-avere-un-canale">
+        
+        
+          Quanti iscritti può avere un canale? <a href="#quanti-iscritti-può-avere-un-canale" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>I canali sono progettati per un pubblico molto più ampio rispetto ai <a href="#groups">gruppi</a>.</p>
+
+<p>Il limite pratico dipende dal numero di <a href="#relays">ripetitori</a> utilizzati, quindi non esiste un singolo numero fisso valido ovunque.</p>
+
+<p>Per canali molto grandi con diverse decine di migliaia di iscritti,
+consigliamo di utilizzare un <a href="#multiple-accounts">profilo dedicato</a> per il canale
+e di verificare se il ripetitore è adatto.</p>
+
+<p>Ma non esitare troppo: Delta Chat è progettato per essere indipendente dal ripetitore,
+quindi puoi cambiare il tuo ripetitore in qualsiasi momento con facilità -
+i tuoi iscritti esistenti non se ne accorgeranno nemmeno.
+In tal caso, dovrai solo aggiornare il collegamento di invito che condividi con i nuovi iscritti.</p>
+    
+      <h2 id="calls">
+        
+        
+          Chiamate <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -897,7 +1112,7 @@ Un dispositivo non è necessario perché l’altro funzioni.</p>
     <p>Verificare che entrambi i dispositivi siano nella <strong>stessa rete o Wi-Fi</strong>.</p>
   </li>
   <li>
-    <p>Su <strong>Windows</strong>, vai su <strong>Pannello di controllo / Rete e Internet</strong>
+    <p>Su <strong>Windows</strong>, vai su “Pannello di controllo / Rete e Internet”
 e assicurati che <strong>Rete Privata</strong> sia selezionata come “Tipo di profilo di rete”
 (dopo il trasferimento è possibile ripristinare il valore originale)</p>
   </li>
@@ -987,10 +1202,10 @@ o l’AppImage per Linux. Le trovi su
         
       </h2>
     
-      <h3 id="funzionalità-sperimentali">
+      <h3 id="experiments">
         
         
-          Funzionalità Sperimentali <a href="#funzionalità-sperimentali" class="anchor"></a>
+          Funzionalità Sperimentali <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1024,16 +1239,22 @@ Tuttavia, se lo si desidera,
 
 <ul>
   <li>
-    <p>Puoi <strong>aggiungere</strong> un ripetitore scansionando il suo codice QR;<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> ne mostra alcuni noti.
-Se hai più ripetitori, riceverai messaggi su tutti.</p>
+    <p>Puoi <strong>aggiungere</strong> un ripetitore scansionando il suo codice QR;
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> mostra alcuni ripetitori noti.
+Se hai più ripetitori, riceverai i messaggi su tutti.
+I contatti vengono a conoscenza automaticamente dei tuoi ripetitori attuali quando invii loro un messaggio.</p>
   </li>
   <li>
-    <p>L’opzione <strong>predefinita</strong> definisce quella a cui i tuoi partner di chat invieranno messaggi futuri.</p>
+    <p>Tocca un ripetitore per impostarlo come <strong>utilizzato per l’invio</strong>.</p>
   </li>
   <li>
     <p>Se <strong>rimuovi</strong> un ripetitore,
-assicurati che un altro ripetitore predefinito sia stato utilizzato per un periodo di tempo sufficiente.
-In caso contrario, i messaggi dei tuoi interlocutori di chat non ti   arriveranno.In caso di dubbio, rimuovilo in seguito.</p>
+i contatti che conoscono solo quel ripetitore potrebbero non raggiungerti finché non invierai loro un nuovo messaggio.
+Per rimanere raggiungibile nel frattempo, seleziona <strong>Nascondi dai Contatti</strong> nella finestra di dialogo di conferma
+invece di rimuoverlo immediatamente.</p>
+  </li>
+  <li>
+    <p>Per <strong>visualizzare</strong> nuovamente un ripetitore nascosto, toccalo.</p>
   </li>
 </ul>
 
@@ -1147,9 +1368,7 @@ statistiche settimanali verranno inviate automaticamente a un bot.</p>
         
       </h3>
 
-<ul>
-  <li>Vedi <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standard usati in Delta Chat</a>.</li>
-</ul>
+<p>Vedi <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standard usati in Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1178,6 +1397,10 @@ per scambiare informazioni sulla configurazione della crittografia tramite la sc
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> viene utilizzato per stabilire
 automaticamente la crittografia end-to-end tra i contatti e tutti i membri di una chat di gruppo.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, la cui piena implementazione è prevista per il 2026,
+introdurrà una crittografia post-quantistica resistente e una segretezza avanzata.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Condivisione di un contatto con una
@@ -1386,6 +1609,29 @@ con la consapevolezza che tutti i loro dati, insieme a tutti i metadati, verrann
 Inoltre, se un dispositivo viene sequestrato, i contatti di chat che utilizzano profili di breve durata
 non possono essere identificati facilmente.</p>
     
+      <h3 id="chi-vede-il-mio-indirizzo-ip">
+        
+        
+          Chi vede il mio Indirizzo IP? <a href="#chi-vede-il-mio-indirizzo-ip" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1415,7 +1661,7 @@ ma un’implementazione non è stata ancora concordata come priorità.</p>
         
       </h3>
 
-<p>No, non ancora.</p>
+<p>Non ancora, ma arriverà con <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat al momento non supporta la tecnologia Perfect Forward Secrecy (PFS).
 Ciò significa che se la tua chiave di decrittazione privata viene divulgata
@@ -1426,12 +1672,9 @@ In caso contrario, chi ottiene le tue chiavi di decrittazione
 in genere è in grado di ottenere anche tutti i tuoi messaggi non eliminati
 e non ha nemmeno bisogno di decifrare i messaggi raccolti in precedenza.</p>
 
-<p>Abbiamo progettato un approccio Forward Secrecy che ha superato
-l’esame iniziale di alcuni crittografi ed esperti di implementazione
-ma è in attesa di una stesura più formale
-per accertarne l’affidabilità nella messaggistica federata e nell’utilizzo su più dispositivi,
-prima di poter essere implementato in <a href="https://github.com/chatmail/core">chatmail core</a>,
-che lo renderebbe disponibile in tutti i <a href="https://chatmail.at/clients">clients di chatmail</a>.</p>
+<p><a href="https://autocrypt2.org">autocrypt v2</a>, la cui piena implementazione è prevista per il 2026,
+garantirà un’eliminazione affidabile (segretezza in avanti) tramite rotazione automatica delle chiavi.
+Questo approccio è specificato nella bozza dei <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">certificati OpenPGP di Autocrypt v2</a>.</p>
     
       <h3 id="pqc">
         
@@ -1441,12 +1684,13 @@ che lo renderebbe disponibile in tutti i <a href="https://chatmail.at/clients">c
         
       </h3>
 
-<p>No, non ancora.</p>
+<p>Non ancora, ma arriverà con <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat utilizza la libreria Rust OpenPGP <a href="https://github.com/rpgp/rpgp">rPGP</a>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, la cui piena implementazione è prevista per il 2026,
+offrirà una crittografia post-quantistica resistente per proteggere dagli attacchi ai computer quantistici.
+Delta Chat utilizza la libreria Rust OpenPGP <a href="https://github.com/rpgp/rpgp">rPGP</a>
 che supporta l’ultima <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">bozza IETF Post-Quantum-Cryptography OpenPGP</a>.
-Il nostro obiettivo è aggiungere il supporto PQC nel <a href="https://github.com/chatmail/core">core di chatmail</a> dopo che la bozza sarà stata finalizzata dall’IETF
-in collaborazione con altri implementatori di OpenPGP.</p>
+L’implementazione è specificata nella bozza dei <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Certificati OpenPGP Autocrypt v2</a>.</p>
     
       <h3 id="come-posso-controllare-manualmente-le-informazioni-di-crittografia">
         
@@ -1524,7 +1768,7 @@ Vedi <a href="https://delta.chat/en/2023-05-22-webxdc-security">qui per la stori
   <li>
     <p>A partire dal 2023, <a href="https://cure53.de">Cure53</a> ha analizzato sia la crittografia del trasporto delle
 Connessioni di rete di Delta Chat e una configurazione del server di posta riproducibile come
-<a href="https://delta.chat/it/serverguide">consigliato su questo sito</a>.
+<a href="https://delta.chat/serverguide">consigliato su questo sito</a>.
 Puoi leggere ulteriori informazioni sull’audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">sul nostro blog</a>
 o leggere il <a href="https://delta.chat/assets/blog/MER-01-report.pdf">rapporto completo qui</a>.</p>
   </li>
@@ -1626,10 +1870,21 @@ ordinate cronologicamente:</p>
 
 <ul>
   <li>
-    <p>Il progetto UE <a href="https://nextleap.eu">NEXTLEAP</a> ha finanziato la ricerca
-e implementazione di gruppi verificati e impostazione di protocolli di contatto
-nel 2017 e nel 2018 e ha anche contribuito a integrare la crittografia end-to-end
-tramite <a href="https://autocrypt.org">Autocrypt</a>.</p>
+    <p>Nel 2023 e nel 2024 siamo stati accettati nel programma Next Generation Internet (NGI)
+per il nostro lavoro in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+insieme ai partner di collaborazione che lavorano su 
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> e 
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
+Tutti questi progetti sono parzialmente completati o saranno completati all’inizio del 2025.</p>
+  </li>
+  <li>
+    <p>Nel 2021 abbiamo ricevuto ulteriori finanziamenti dall’UE per due proposte di Next-Generation-Internet, ovvero per <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - directory di portabilità dei provider di posta elettronica</a> (~97.000 EUR) e <a href="https://nlnet.nl/project/EmailPorting/">AEAP - portabilità degli indirizzi email</a> (~90.000 EUR), che hanno portato a un migliore supporto multi-profilo, a un miglioramento delle impostazioni di contatto e di gruppo tramite codice QR e a numerosi miglioramenti di rete su tutte le piattaforme.</p>
+  </li>
+  <li>
+    <p>La <a href="https://nlnet.nl/">fondazione NLnet</a> ha concesso nel 2019/2020 46.000 EUR per
+completando i collegamenti Rust/Python e avviando un ecosistema Chat-bot.</p>
   </li>
   <li>
     <p>L’<a href="https://opentechfund.org">Open Technology Fund</a> ci ha dato una
@@ -1642,33 +1897,10 @@ rilasciare nelle versioni Delta/iOS, per convertire la nostra libreria principal
 per fornire nuove funzionalità per tutte le piattaforme.</p>
   </li>
   <li>
-    <p>La <a href="https://nlnet.nl/">fondazione NLnet</a> ha concesso nel 2019/2020 46.000 EUR per
-completando i collegamenti Rust/Python e avviando un ecosistema Chat-bot.</p>
-  </li>
-  <li>
-    <p>Nel 2021 abbiamo ricevuto ulteriori finanziamenti dall’UE per due proposte di Next-Generation-Internet, ovvero per <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - directory di portabilità dei provider di posta elettronica</a> (~97.000 EUR) e <a href="https://nlnet.nl/project/EmailPorting/">AEAP - portabilità degli indirizzi email</a> (~90.000 EUR), che hanno portato a un migliore supporto multi-profilo, a un miglioramento delle impostazioni di contatto e di gruppo tramite codice QR e a numerosi miglioramenti di rete su tutte le piattaforme.</p>
-  </li>
-  <li>
-    <p>Da fine 2021 a marzo 2023 abbiamo ricevuto un finanziamento <em>Internet Freedom</em> (500.000 USD) dall’Ufficio per la Democrazia, i Diritti Umani e il Lavoro (DRL) degli Stati Uniti.
-Questo finanziamento ha supportato i nostri obiettivi a lungo termine: rendere Delta Chat più utilizzabile
-e compatibile con un’ampia gamma di server email in tutto il mondo, e più resiliente e sicura
-in luoghi spesso colpiti da censura e blocchi di Internet.</p>
-  </li>
-  <li>
-    <p>2023-2024 abbiamo completato con successo il progetto <a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Chatmail Sicuro</a> finanziato da OTF, 
-consentendoci di introdurre la crittografia garantita, 
-creando una <a href="https://delta.chat/chatmail">rete di server di chatmail</a> 
-e fornendo “inserimento immediato” in tutte le app rilasciate da aprile 2024 in poi.</p>
-  </li>
-  <li>
-    <p>Nel 2023 e nel 2024 siamo stati accettati nel programma Next Generation Internet (NGI)
-per il nostro lavoro in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-insieme ai partner di collaborazione che lavorano su 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> e 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-Tutti questi progetti sono parzialmente completati o saranno completati all’inizio del 2025.</p>
+    <p>Il progetto UE <a href="https://nextleap.eu">NEXTLEAP</a> ha finanziato la ricerca
+e implementazione di gruppi verificati e impostazione di protocolli di contatto
+nel 2017 e nel 2018 e ha anche contribuito a integrare la crittografia end-to-end
+tramite <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>A volte riceviamo donazioni una tantum da privati.

src/main/assets/help/nl/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#ondersteunt-delta-chat-afbeeldingen-videos-en-ander-soort-bijlagen">Ondersteunt Delta Chat afbeeldingen, video’s en ander soort bijlagen?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#wie-kan-mijn-profielfoto-zien">Wie kan mijn profielfoto zien?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,6 +13,7 @@
       <li><a href="#wat-betekent-die-groene-stip">Wat betekent die groene stip?</a></li>
       <li><a href="#wat-betekenen-de-vinkjes-naast-verzonden-berichten">Wat betekenen de vinkjes naast verzonden berichten?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
       <li><a href="#delold">Wat gebeurt er als ik ‘Oude berichten van server verwijderen’ inschakel?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
@@ -26,6 +26,22 @@
       <li><a href="#ik-heb-mezelf-per-ongeluk-verwijderd">Ik heb mezelf per ongeluk verwijderd</a></li>
       <li><a href="#ik-wil-geen-groepsberichten-meer-ontvangen">Ik wil geen groepsberichten meer ontvangen</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">How does Delta Chat protect metadata in messages?</a></li>
       <li><a href="#device-seizure">How to protect metadata and contacts when a device is seized?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="ondersteunt-delta-chat-afbeeldingen-videos-en-ander-soort-bijlagen">
-        
-        
-          Ondersteunt Delta Chat afbeeldingen, video’s en ander soort bijlagen? <a href="#ondersteunt-delta-chat-afbeeldingen-videos-en-ander-soort-bijlagen" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Yes. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>Om de prestaties te verhogen, worden afbeeldingen standaard geoptimaliseerd en verkleind verstuurd, maar je kunt ze als een bestand verzenden om het origineel te sturen.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>In de instellingen kun je een profielfoto toevoegen. Als je een bericht stuurt aan
-je contactpersonen of ze toevoegt middels hun QR-code, dan krijgen ze je profielfoto te zien.</p>
-  </li>
-  <li>
-    <p>Omwille van je privacy, krijgen anderen je profielfoto pas te zien
-als je ze een bericht stuurt.</p>
-  </li>
-</ul>
+<p>In de instellingen kun je een profielfoto toevoegen. Als je een bericht stuurt aan
+  je contactpersonen of ze toevoegt middels hun QR-code, dan krijgen ze je profielfoto te zien.</p>
+
+<p>Omwille van je privacy, krijgen anderen je profielfoto pas te zien
+  als je ze een bericht stuurt.</p>
     
       <h3 id="signature">
         
@@ -304,8 +299,7 @@ they will see it when they view your contact details.</p>
     <p>Stel gesprekken in op <strong>Negeren</strong> als je geen meldingen meer wilt ontvangen. Wel blijven genegeerde gesprekken op de lijst staan en kun je ze te allen tijde vastmaken.</p>
   </li>
   <li>
-    <p><strong>Archiveer gesprekken</strong> als je ze niet meer op de gesprekslijst wilt zien.
-Gearchiveerde gesprekken zijn te allen tijde te bekijken boven de lijst of via een zoekopdracht.</p>
+    <p><strong>Archiveer gesprekken</strong> als je ze niet meer op de gesprekslijst wilt zien. Gearchiveerde gesprekken zijn te allen tijde te bekijken boven de lijst of via een zoekopdracht.</p>
   </li>
   <li>
     <p>Als er een nieuw bericht in een gearchiveerd gesprek wordt ontvangen, dan wordt het gesprek in kwestie <strong>ge-dearchiveerd</strong> en dus weer op de gesprekslijst geplaatst.
@@ -341,7 +335,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -378,22 +372,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -422,6 +412,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -463,12 +479,9 @@ the (anyway encrypted) messages may take longer to get deleted from their server
         
       </h3>
 
-<ul>
-  <li>Als je ruimte wilt besparen op je apparaat, dan kun je er voor kiezen om oude
-berichten automatisch te verwijderen.</li>
-  <li>Inschakelen kan via de sectie ‘Gesprekken en media’ in de instellingen. Je kunt een periode tussen
-‘na één uur’ en ‘na één jaar’ kiezen. *Alle berichten die ouder zijn, worden verwijderd.</li>
-</ul>
+<p>Als je ruimte wilt besparen op je apparaat, dan kun je er voor kiezen om oude berichten automatisch te verwijderen.</p>
+
+<p>Inschakelen kan via de sectie ‘Gesprekken en media’ in de instellingen. Je kunt een periode tussen ‘na één uur’ en ‘na één jaar’ kiezen. <em>Alle</em> berichten die ouder zijn, worden verwijderd.</p>
     
       <h3 id="remove-account">
         
@@ -516,9 +529,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Open het ‘menu met de drie puntjes’ rechtsboven in het gespreksoverzicht, kies <strong>Nieuw gesprek</strong> en daarna <strong>Nieuwe groep</strong>.</li>
-  <li>Kies dan de <strong>groepsleden</strong> en druk op het vinkje rechtsboven. Daarna kun je een <strong>groepsnaam</strong> opgeven.</li>
-  <li>Zodra je het <strong>eerste groepsbericht</strong> hebt verstuurd, worden alle deelnemers op de hoogte gebracht en kunnen zij antwoorden versturen (de groep blijft onzichtbaar voor anderen zolang jij geen bericht verstuurt).</li>
+  <li>
+    <p>Open het ‘menu met de drie puntjes’ rechtsboven in het gespreksoverzicht, kies <strong>Nieuw gesprek</strong> en daarna <strong>Nieuwe groep</strong>.</p>
+  </li>
+  <li>
+    <p>Kies dan de <strong>groepsleden</strong> en druk op het vinkje rechtsboven. Daarna kun je een <strong>groepsnaam</strong> opgeven.</p>
+  </li>
+  <li>
+    <p>Zodra je het <strong>eerste groepsbericht</strong> hebt verstuurd, worden alle deelnemers op de hoogte gebracht en kunnen zij antwoorden versturen (de groep blijft onzichtbaar voor anderen zolang jij geen bericht verstuurt).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -529,11 +548,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -561,10 +579,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Je neemt geen deel meer aan de groep en kunt jezelf dus niet meer toevoegen.
-Vraag iemand via een één-op-ééngesprek of hij/zij je weer wilt toevoegen.</li>
-</ul>
+<p>Je neemt geen deel meer aan de groep en kunt jezelf dus niet meer toevoegen.
+  Vraag iemand via een één-op-ééngesprek of hij/zij je weer wilt toevoegen.</p>
     
       <h3 id="ik-wil-geen-groepsberichten-meer-ontvangen">
         
@@ -575,15 +591,12 @@ Vraag iemand via een één-op-ééngesprek of hij/zij je weer wilt toevoegen.</l
       </h3>
 
 <ul>
-  <li>
-    <p>Verwijder jezelf van de groepslijst of verwijder het hele groepsgesprek.
-Als je later weer wilt deelnemen, vraag dan iemand anders of hij/zij je weer wilt toevoegen.</p>
-  </li>
-  <li>
-    <p>Wat ook kan doen is groepsmeldingen uitschakelen. Zo blijf je in de groep, maar ontvang je
-geen meldingen meer als er nieuwe berichten zijn.</p>
-  </li>
+  <li>Verwijder jezelf van de groepslijst of verwijder het hele groepsgesprek.
+Als je later weer wilt deelnemen, vraag dan iemand anders of hij/zij je weer wilt toevoegen.</li>
 </ul>
+
+<p>Wat ook kan doen is groepsmeldingen uitschakelen. Zo blijf je in de groep, maar ontvang je
+  geen meldingen meer als er nieuwe berichten zijn.</p>
     
       <h3 id="cloning-a-group">
         
@@ -609,6 +622,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -896,7 +1115,7 @@ op beide apparaten</strong>. Hierdoor hoef je niet het ene apparaat bij de hand
     <p>Controleer of beide apparaten verbonden zijn met <strong>hetzelfde (wifi)netwerk</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -991,10 +1210,10 @@ of de AppImage van de Linux-client. Deze kun je downloaden op
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1024,22 +1243,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1153,9 +1376,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Bekijk de pagina <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Door Delta Chat gebruikte standaarden</a>.</li>
-</ul>
+<p>Bekijk de pagina <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Door Delta Chat gebruikte standaarden</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1184,6 +1405,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1368,12 +1593,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1394,6 +1617,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1423,7 +1669,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1434,12 +1680,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1449,12 +1692,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1531,7 +1775,7 @@ Lees <a href="https://delta.chat/en/2023-05-22-webxdc-security">hier het volledi
   <li>
     <p>Aan het begin van 2023 heeft <a href="https://cure53.de">Cure53</a> de transportversleuteling van
 Delta Chats netwerkverbindingen getest, evenals de e-mailserveropzet zoals
-<a href="https://delta.chat/nl/serverguide">beschreven op onze site</a>.
+<a href="https://delta.chat/serverguide">beschreven op onze site</a>.
 Meer informatie over deze test is te lezen <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">op ons blog</a>
 of in het <a href="https://delta.chat/assets/blog/MER-01-report.pdf">volledige verslag</a>.</p>
   </li>
@@ -1633,52 +1877,38 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p><a href="https://opentechfund.org">Open Technology Fund</a> heeft twee subsidies toegekend.
-De eerste subsidie, voor 2018/2019, ter waarde van ong. $200,000, heeft enorm geholpen om de Android-app 
-te verbeteren en een bètaversie van de computerclient vrij te geven. 
-Verder hebben we onderzoek kunnen doen naar het uiterlijk in relatie tot mensenrechten - 
-bekijk onze conclusie hier: <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-De tweede subsidie, voor 2019/2020, ter waarde van ong. $300,000, loopt nog en ondersteunt ons bij het 
-vrijgeven van de iOS-client, het overzetten van de code van de kernbibliotheek naar Rust en
-het implementeren van nieuwe functies op alle platformen.</p>
-  </li>
-  <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
   </li>
   <li>
     <p>In 2021 we received further EU funding for two Next-Generation-Internet
 proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
   </li>
   <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
+    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
+completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
   </li>
   <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
+    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a
+first 2018/2019 grant (~$200K) during which we majorly improved the Android app
+and released a first Desktop app beta version, and which moreover
+moored our feature developments in UX research in human rights contexts,
+see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+The second 2019/2020 grant (~$300K) helped us to
+release Delta/iOS versions, to convert our core library to Rust, and
+to provide new features for all platforms.</p>
   </li>
   <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
+and implementation of verified groups and setup contact protocols
+in 2017 and 2018 and also helped to integrate end-to-end Encryption
+through <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Soms ontvangen we eenmalige donaties van privépersonen, waar we

src/main/assets/help/pl/help.html

@@ -2,30 +2,46 @@
 <html lang="pl"><head><meta charset="UTF-8" /><meta name="viewport" content="initial-scale=1.0" /><link rel="stylesheet" href="../help.css" /></head><body><ul id="top">
   <li><a href="#czym-jest-delta-chat">Czym jest Delta Chat?</a>
     <ul>
-      <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
-      <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
-      <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#czy-delta-chat-obsługuje-obrazy-filmy-i-inne-załączniki">Czy Delta Chat obsługuje obrazy, filmy i inne załączniki?</a></li>
+      <li><a href="#howtoe2ee">Jak znaleźć osoby do czatu?</a></li>
+      <li><a href="#dlaczego-czat-jest-oznaczony-jako-prośba">Dlaczego czat jest oznaczony jako „Prośba”?</a></li>
+      <li><a href="#jak-mogę-skontaktować-ze-sobą-dwóch-znajomych">Jak mogę skontaktować ze sobą dwóch znajomych?</a></li>
       <li><a href="#multiple-accounts">Czym są profile? Jak mogę przełączać się między nimi?</a></li>
       <li><a href="#kto-widzi-moje-zdjęcie-profilowe">Kto widzi moje zdjęcie profilowe?</a></li>
-      <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
+      <li><a href="#signature">Czy w Delta Chat mogę ustawić biografię/status?</a></li>
       <li><a href="#co-oznacza-przypinanie-wyciszanie-i-archiwizowanie">Co oznacza przypinanie, wyciszanie i archiwizowanie?</a></li>
       <li><a href="#save">Jak działają „Zapisane wiadomości”?</a></li>
       <li><a href="#co-oznacza-zielona-kropka">Co oznacza zielona kropka?</a></li>
       <li><a href="#co-oznaczają-znaczniki-wyświetlane-obok-wiadomości-wychodzących">Co oznaczają znaczniki wyświetlane obok wiadomości wychodzących?</a></li>
       <li><a href="#edit">Poprawianie literówek i usuwanie wiadomości po wysłaniu</a></li>
+      <li><a href="#mediaquality">Jak obsługiwana jest jakość multimediów?</a></li>
       <li><a href="#ephemeralmsgs">Jak działają znikające wiadomości?</a></li>
       <li><a href="#delold">Co się stanie, jeśli włączę opcję „Usuń wiadomości z urządzenia”?</a></li>
-      <li><a href="#remove-account">How can I delete my chat profile?</a></li>
+      <li><a href="#remove-account">Jak mogę usunąć swój profil czatu?</a></li>
     </ul>
   </li>
-  <li><a href="#groups">Groups</a>
+  <li><a href="#groups">Grupy</a>
     <ul>
       <li><a href="#tworzenie-grupy">Tworzenie grupy</a></li>
-      <li><a href="#addmembers">Add and remove members</a></li>
+      <li><a href="#addmembers">Dodawanie i usuwanie członków</a></li>
       <li><a href="#usunąłem-się-przez-przypadek">Usunąłem się przez przypadek.</a></li>
       <li><a href="#nie-chcę-już-otrzymywać-wiadomości-od-grupy">Nie chcę już otrzymywać wiadomości od grupy.</a></li>
-      <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#klonowanie-grupy">Klonowanie grupy</a></li>
+      <li><a href="#ilu-członków-może-należeć-do-jednej-grupy">Ilu członków może należeć do jednej grupy?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Kanały</a>
+    <ul>
+      <li><a href="#subskrybowanie-kanału">Subskrybowanie kanału</a></li>
+      <li><a href="#tworzenie-kanału">Tworzenie kanału</a></li>
+      <li><a href="#ilu-subskrybentów-może-mieć-kanał">Ilu subskrybentów może mieć kanał?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Połączenia</a>
+    <ul>
+      <li><a href="#nawiązywanie-połączenia">Nawiązywanie połączenia</a></li>
+      <li><a href="#odbieranie-lub-odrzucanie-połączenia">Odbieranie lub odrzucanie połączenia</a></li>
+      <li><a href="#w-trakcie-połączenia">W trakcie połączenia</a></li>
+      <li><a href="#nieodebrane-połączenia-i-powiadomienia">Nieodebrane połączenia i powiadomienia</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#zaawansowane">Zaawansowane</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Czy wiadomości oznaczone ikoną poczty są widoczne w internecie?</a></li>
       <li><a href="#message-metadata">W jaki sposób Delta Chat chroni metadane w wiadomościach?</a></li>
       <li><a href="#device-seizure">Jak chronić metadane i kontakty w przypadku przejęcia urządzenia?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Czy Delta Chat obsługuje funkcję „Sealed Sender”?</a></li>
       <li><a href="#pfs">Czy Delta Chat obsługuje funkcję Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Czy Delta Chat obsługuje kryptografię postkwantową?</a></li>
@@ -103,89 +120,69 @@
         
       </h2>
 
-<p>Delta Chat is a reliable, decentralized and secure instant messaging app,
-available for mobile and desktop platforms.</p>
+<p>Delta Chat to niezawodna, zdecentralizowana i bezpieczna aplikacja do błyskawicznego przesyłania wiadomości, dostępna na platformy mobilne i stacjonarne.</p>
+
+<p>Natychmiastowe tworzenie <strong>prywatnych profili czatu</strong> z bezpiecznymi i interoperacyjnymi <a href="https://chatmail.at/relays">przekaźnikami chatmail</a>, które oferują natychmiastowe dostarczanie wiadomości oraz powiadomienia push dla urządzeń z systemem iOS i Android.</p>
 
 <ul>
   <li>
-    <p>Instant creation of <strong>private chat profiles</strong>
-with secure and interoperable <a href="https://chatmail.at/relays">chatmail relays</a>
-that offer instant message delivery, and Push Notifications for iOS and Android devices.</p>
+    <p>Wszechstronna obsługa <a href="#multiple-accounts">wielu profili</a> i <a href="#multiclient">wielu urządzeń</a> na wszystkich platformach i między różnymi <a href="https://chatmail.at/clients">aplikacjami chatmail</a>.</p>
   </li>
   <li>
-    <p>Pervasive <a href="#multiple-accounts">multi-profile</a> and
-<a href="#multiclient">multi-device</a> support on all platforms
-and between different <a href="https://chatmail.at/clients">chatmail apps</a>.</p>
+    <p>Interaktywne <a href="#webxdc">aplikacje do czatu</a> w grach i do współpracy</p>
   </li>
   <li>
-    <p>Interactive <a href="#webxdc">in-chat apps</a> for gaming and collaboration</p>
+    <p><a href="#security-audits">Audytowne szyfrowanie end-to-end</a> zabezpieczające przed atakami sieciowymi i serwerowymi.</p>
   </li>
   <li>
-    <p><a href="#security-audits">Audited end-to-end encryption</a>
-safe against network and server attacks.</p>
-  </li>
-  <li>
-    <p>Free and Open Source software, both app and server side,
-built on <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Internet Standards</a>.</p>
+    <p>Bezpłatne i otwartoźródłowe oprogramowanie zarówno po stronie aplikacji, jak i serwera, stworzone w oparciu o <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">standardy internetowe</a>.</p>
   </li>
 </ul>
     
       <h3 id="howtoe2ee">
         
         
-          How can I find people to chat with? <a href="#howtoe2ee" class="anchor"></a>
+          Jak znaleźć osoby do czatu? <a href="#howtoe2ee" class="anchor"></a>
         
         
       </h3>
 
-<p>First, note that Delta Chat is a private messenger.
-There is no public discovery, <em>you</em> decide about your contacts.</p>
+<p>Najpierw pamiętaj, że Delta Chat to prywatny komunikator. Nie ma możliwości publicznego wyszukiwania, sam decydujesz o swoich kontaktach.</p>
 
 <ul>
   <li>
-    <p>If you are <strong>face to face</strong> with your friend or family,
-tap the <strong>QR Code</strong> icon <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" />
-on the main screen.<br />
-Ask your chat partner to <strong>scan</strong> the QR image
-with their Delta Chat app.</p>
+    <p>Jeśli jesteś twarzą w twarz ze znajomym lub rodziną, dotknij ikony <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>kodu QR</strong> na ekranie głównym.
+Poproś partnera czatu o <strong>zeskanowanie</strong> obrazu QR za pomocą aplikacji Delta Chat.</p>
   </li>
   <li>
-    <p>For a <strong>remote</strong> contact setup,
-from the same screen,
-click “Copy” or “Share” and send the <strong>invite link</strong>
-through another private chat.</p>
+    <p>Aby skonfigurować kontakt <strong>zdalny</strong>, na tym samym ekranie naciśnij „Kopiuj” lub „Udostępnij” i wyślij <strong>link zaproszenia</strong> za pośrednictwem innego prywatnego czatu.</p>
   </li>
 </ul>
 
-<p>Now wait while connection gets established.</p>
+<p>Poczekaj, aż połączenie zostanie nawiązane.</p>
 
 <ul>
   <li>
-    <p>If both sides are online, they will soon see a chat
-and can start messaging securely.</p>
+    <p>Jeśli obie strony są online, wkrótce zobaczą czat i będą mogły bezpiecznie wysyłać wiadomości.</p>
   </li>
   <li>
-    <p>If one side is offline or in bad network,
-the ability to chat is delayed until connectivity is restored.</p>
+    <p>Jeśli jedna ze stron jest offline lub ma słaby zasięg, możliwość czatowania zostanie wstrzymana do czasu przywrócenia połączenia.</p>
   </li>
 </ul>
 
-<p>Congratulations!
-You now will automatically use <a href="#e2ee">end-to-end encryption</a> with this contact.
-If you add each other to <a href="#groups">groups</a>, end-to-end encryption will be established among all members.</p>
+<p>Gratulacje! Teraz będziesz automatycznie korzystać z <a href="#e2ee">szyfrowania typu end-to-end</a> dla tego kontaktu. Jeśli dodacie się nawzajem do <a href="#groups">grup</a>, szyfrowanie typu end-to-end zostanie nawiązane między wszystkimi członkami.</p>
     
-      <h3 id="why-is-a-chat-marked-as-request">
+      <h3 id="dlaczego-czat-jest-oznaczony-jako-prośba">
         
         
-          Why is a chat marked as “Request”? <a href="#why-is-a-chat-marked-as-request" class="anchor"></a>
+          Dlaczego czat jest oznaczony jako „Prośba”? <a href="#dlaczego-czat-jest-oznaczony-jako-prośba" class="anchor"></a>
         
         
       </h3>
 
-<p>As being a private messenger,
-only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
+<p>Ponieważ jest to prywatny komunikator, tylko znajomi i rodzina, którym <a href="#howtoe2ee">udostępnisz swój kod QR lub link zaproszenia</a>, mogą do ciebie pisać.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Twoi znajomi mogą udostępniać twoje dane kontaktowe innym znajomym, co jest oznaczone jako <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Prośba</b></p>
 
 <ul>
   <li>
@@ -199,37 +196,17 @@ only friends and family you <a href="#howtoe2ee">share your QR code or invite li
   </li>
 </ul>
     
-      <h3 id="how-can-i-put-two-of-my-friends-in-contact-with-each-other">
+      <h3 id="jak-mogę-skontaktować-ze-sobą-dwóch-znajomych">
         
         
-          How can I put two of my friends in contact with each other? <a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other" class="anchor"></a>
+          Jak mogę skontaktować ze sobą dwóch znajomych? <a href="#jak-mogę-skontaktować-ze-sobą-dwóch-znajomych" class="anchor"></a>
         
         
       </h3>
 
-<p>Attach the first contact to the chat of the second using <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment Button → Contact</strong>.
-You can also add a little introduction message.</p>
+<p>Dołącz pierwszy kontakt do czatu drugiego, używając przycisku <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Dołączania → Kontakt</strong>. Możesz również dodać krótką wiadomość powitalną.</p>
 
-<p>The second contact will receive a <strong>card</strong> then
-and can tap it to start chatting with the first contact.</p>
-    
-      <h3 id="czy-delta-chat-obsługuje-obrazy-filmy-i-inne-załączniki">
-        
-        
-          Czy Delta Chat obsługuje obrazy, filmy i inne załączniki? <a href="#czy-delta-chat-obsługuje-obrazy-filmy-i-inne-załączniki" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Tak. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>Ze względu na wydajność obrazy są domyślnie optymalizowane i wysyłane w mniejszym rozmiarze, ale można je wysłać jako „plik”, aby zachować oryginał.</p>
-  </li>
-</ul>
+<p>Drugi kontakt otrzyma wtedy <strong>kartkę</strong> i może ją nacisnąć, aby rozpocząć czat z pierwszym kontaktem.</p>
     
       <h3 id="multiple-accounts">
         
@@ -239,15 +216,13 @@ or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png"
         
       </h3>
 
-<p>A profile is <strong>a name, a picture</strong> and some additional information for encrypting messages.
-A profile lives on your device(s) only
-and uses the server only to relay messages.</p>
+<p>Profil składa się z <strong>nazwy, zdjęcia</strong> i dodatkowych informacji służących do szyfrowania wiadomości. Profil jest dostępny tylko na twoim urządzeniu (urządzeniach) i korzysta z serwera wyłącznie do przekazywania wiadomości.</p>
 
 <p>Podczas pierwszej instalacji Delta Chat tworzony jest pierwszy profil.</p>
 
 <p>Później możesz dotknąć swojego zdjęcia profilowego w lewym górnym rogu, aby <strong>Dodać profile</strong> lub <strong>Przełączyć profile</strong>.</p>
 
-<p>You may want to use separate profiles for political, family or work related activities.</p>
+<p>Możesz używać osobnych profili dla aktywności politycznych, rodzinnych lub zawodowych.</p>
 
 <p>Możesz także dowiedzieć się, <a href="#multiclient">jak używać tego samego profilu na wielu urządzeniach</a>.</p>
     
@@ -259,27 +234,19 @@ and uses the server only to relay messages.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Możesz dodać zdjęcie profilowe w swoich ustawieniach. Jeśli napiszesz do swoich kontaktów lub dodasz je za pomocą kodu QR, automatycznie zobaczą je jako Twoje zdjęcie profilowe.</p>
-  </li>
-  <li>
-    <p>Ze względów prywatności nikt nie widzi Twojego zdjęcia profilowego, dopóki nie napiszesz do niego wiadomości.</p>
-  </li>
-</ul>
+<p>Możesz dodać zdjęcie profilowe w swoich ustawieniach. Jeśli napiszesz do swoich kontaktów lub dodasz je za pomocą kodu QR, automatycznie zobaczą je jako twoje zdjęcie profilowe.</p>
+
+<p>Ze względów prywatności nikt nie widzi twojego zdjęcia profilowego, dopóki nie napiszesz do niego wiadomości.</p>
     
       <h3 id="signature">
         
         
-          Can I set a Bio/Status with Delta Chat? <a href="#signature" class="anchor"></a>
+          Czy w Delta Chat mogę ustawić biografię/status? <a href="#signature" class="anchor"></a>
         
         
       </h3>
 
-<p>Yes,
-you can do so under <strong>Settings → Profile → Bio</strong>.
-Once you sent a message to a contact,
-they will see it when they view your contact details.</p>
+<p>Tak, możesz to zrobić w <strong>Ustawieniach → Profil → Biografia</strong>. Po wysłaniu wiadomości do kontaktu zostanie ona wyświetlona, ​​gdy będzie on przeglądał twoje dane kontaktowe.</p>
     
       <h3 id="co-oznacza-przypinanie-wyciszanie-i-archiwizowanie">
         
@@ -299,7 +266,7 @@ they will see it when they view your contact details.</p>
     <p><strong>Wycisz czaty</strong>, jeśli nie chcesz otrzymywać z nich powiadomień. Wyciszone czaty pozostają na swoim miejscu i możesz też przypiąć wyciszony czat.</p>
   </li>
   <li>
-    <p><strong>Archiwizuj czaty</strong>, jeśli nie chcesz ich już widzieć na liście czatów. Zarchiwizowane czaty pozostają dostępne nad listą czatów lub poprzez wyszukiwanie.</p>
+    <p><strong>Archiwizuj czaty</strong>, jeśli nie chcesz ich już widzieć na liście czatów. Pozostają dostępne nad listą czatów lub poprzez wyszukiwanie i są oznaczone jako <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Zarchiwizowane</b></p>
   </li>
   <li>
     <p>Gdy zarchiwizowany czat otrzyma nową wiadomość, o ile nie zostanie wyciszony, <strong>wyskoczy z archiwum</strong> i wróci na twoją listę czatów.
@@ -330,7 +297,7 @@ they will see it when they view your contact details.</p>
     <p>Później otwórz czat „Zapisane wiadomości” — zobaczysz tam zapisane wiadomości. Naciskając <img style="vertical-align:middle; width:1.2em; margin:1px" src="../go-to-original.png" alt="ikona strzałki w prawo" />, możesz wrócić do oryginalnej wiadomości w oryginalnym czacie</p>
   </li>
   <li>
-    <p>Na koniec możesz również użyć „Zapisz wiadomości”, aby robić <strong>osobiste notatki</strong> — otwórz czat, wpisz coś, dodaj zdjęcie lub wiadomość głosową itp.</p>
+    <p>Na koniec możesz również użyć „Zapisanych wiadomości”, aby robić <strong>osobiste notatki</strong> — otwórz czat, wpisz coś, dodaj zdjęcie lub wiadomość głosową itp.</p>
   </li>
   <li>
     <p>Ponieważ „Zapisane wiadomości” są zsynchronizowane, mogą być bardzo przydatne do przesyłania danych między urządzeniami</p>
@@ -347,13 +314,9 @@ they will see it when they view your contact details.</p>
         
       </h3>
 
-<p>You can sometimes see a <strong>green dot</strong> <img style="vertical-align:middle; width:1.2em; margin:1px" src="../green-dot.png" alt="" />
-next to the avatar of a contact.
-It means they were <strong>recently seen by you</strong> in the last 10 minutes,
-e.g. because they messaged you or sent a read receipt.</p>
+<p>Czasami można zobaczyć <strong>zieloną kropkę</strong> <img style="vertical-align:middle; width:1.2em; margin:1px" src="../green-dot.png" alt="" /> obok awatara kontaktu. Oznacza to, że był on <strong>niedawno widziany przez ciebie</strong> w ciągu ostatnich 10 minut, np. wysłał ci wiadomość lub potwierdzenie odczytu.</p>
 
-<p>So this is not a real time online status
-and others will as well not always see that you are “online”.</p>
+<p>Nie jest to więc status online w czasie rzeczywistym i inni również nie zawsze zobaczą, że jesteś „online”.</p>
     
       <h3 id="co-oznaczają-znaczniki-wyświetlane-obok-wiadomości-wychodzących">
         
@@ -365,23 +328,16 @@ and others will as well not always see that you are “online”.</p>
 
 <ul>
   <li>
-    <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+    <p><strong>Jeden znacznik</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" /> oznacza, że ​​wiadomość została pomyślnie wysłana do <a href="#relays">przekaźnika</a>.</p>
   </li>
   <li>
-    <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+    <p><strong>Dwa znaczniki</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" /> oznaczają, że twój kontakt przeczytał wiadomość.</p>
   </li>
 </ul>
+
+<p>W <a href="#groups">grupach</a> drugi znacznik oznacza, że ​​co najmniej jeden członek potwierdził przeczytanie wiadomości.</p>
+
+<p>Drugi znacznik pojawi się tylko wtedy, gdy ty i jeden z odbiorców, którzy przeczytali wiadomość, macie włączoną opcję <strong>Ustawienia → Czaty → Potwierdzenie odczytu</strong>.</p>
     
       <h3 id="edit">
         
@@ -404,6 +360,28 @@ that a human has read or understood the message ;)</p>
 
 <p>Pamiętaj, że oryginalną wiadomość nadal mogą otrzymać członkowie czatu, którzy mogli już odpowiedzieć, przesłać dalej, zapisać, wykonać zrzut ekranu lub w inny sposób skopiować wiadomość.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          Jak obsługiwana jest jakość multimediów? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Obrazy, filmy, pliki, wiadomości głosowe itp. można wysyłać za pomocą przycisków: <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Załącz</strong> lub <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /><strong>Wiadomość głosowa</strong>.</p>
+
+<ul>
+  <li>
+    <p>Domyślnie kompresja zapewnia <strong>szybką i wydajną dostawę</strong>, respektując limity danych i pamięci wszystkich użytkowników. Jest to idealne rozwiązanie do codziennej komunikacji.</p>
+  </li>
+  <li>
+    <p>W regionach o słabszej łączności można wybrać wyższą kompresję w <strong>Ustawieniach → Czaty → Jakość mediów wychodzących</strong>.</p>
+  </li>
+  <li>
+    <p>Jeśli chcesz wysłać multimedia w <strong>oryginalnej jakości</strong>, użyj w czacie opcji <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Załącz → Plik</strong>. Używaj tej metody oszczędnie, ponieważ wysyłanie oryginalnych plików znacznie zwiększy zużycie danych przez ciebie i wszystkich odbiorców na czacie.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -414,21 +392,11 @@ that a human has read or understood the message ;)</p>
 
 <p>Możesz włączyć „znikające wiadomości” w ustawieniach czatu, w prawym górnym rogu okna czatu, wybierając przedział czasu od 5 minut do 1 roku.</p>
 
-<p>Until the setting is turned off again,
-each chat member’s Delta Chat app takes care
-of deleting the messages
-after the selected time span.
-The time span begins
-when the receiver first sees the message in Delta Chat.
-The messages are deleted both,
-on the servers,
-and in the apps itself.</p>
+<p>Dopóki ustawienie nie zostanie ponownie wyłączone, aplikacja Delta Chat u każdego członka czatu zajmie się usuwaniem wiadomości po wybranym okresie. Przedział czasu rozpoczyna się w momencie, gdy odbiorca po raz pierwszy zobaczy wiadomość w Delta Chat. Wiadomości są usuwane zarówno na serwerze, jak i w samej aplikacji.</p>
 
 <p>Pamiętaj, że na znikających wiadomościach możesz polegać tylko wtedy, gdy ufasz swoim partnerom czatu; złośliwi partnerzy czatu mogą robić zdjęcia lub w inny sposób zapisywać, kopiować lub przesyłać dalej wiadomości przed usunięciem.</p>
 
-<p>Apart from that,
-if one chat partner uninstalls Delta Chat,
-the (anyway encrypted) messages may take longer to get deleted from their server.</p>
+<p>Poza tym, jeśli jeden z uczestników czatu odinstaluje aplikację Delta Chat, usunięcie (i tak zaszyfrowanych) wiadomości z jego serwera może potrwać dłużej.</p>
     
       <h3 id="delold">
         
@@ -438,47 +406,35 @@ the (anyway encrypted) messages may take longer to get deleted from their server
         
       </h3>
 
-<ul>
-  <li>Jeśli chcesz zaoszczędzić miejsce na urządzeniu, możesz wybrać opcję automatycznego usuwania starych wiadomości.</li>
-  <li>Aby ją włączyć, przejdź do „Usuń wiadomości z urządzenia” w ustawieniach w sekcji „Czaty i media”. Możesz ustawić przedział czasowy pomiędzy „po 1 godzinie” a „po 1 roku”; w ten sposób <em>wszystkie</em> wiadomości zostaną usunięte z urządzenia, gdy tylko staną się starsze.</li>
-</ul>
+<p>Jeśli chcesz zaoszczędzić miejsce na swoim urządzeniu, możesz wybrać opcję automatycznego usuwania starych wiadomości.</p>
+
+<p>Aby ją włączyć, przejdź do <strong>Ustawienia → Czaty → Usuń wiadomości z urządzenia</strong> . Możesz ustawić przedział czasowy pomiędzy „po 1 godzinie” a „po 1 roku”; w ten sposób <em>wszystkie</em> wiadomości zostaną usunięte z urządzenia, gdy tylko staną się starsze.</p>
     
       <h3 id="remove-account">
         
         
-          How can I delete my chat profile? <a href="#remove-account" class="anchor"></a>
+          Jak mogę usunąć swój profil czatu? <a href="#remove-account" class="anchor"></a>
         
         
       </h3>
 
-<p>If you are using more than one chat profile,
-you can remove single ones in the top profile switcher menu (on Android and iOS),
-or in the sidebar with a right click (in the Desktop app).
-Chat profiles are only removed on the device where deletion was triggered. 
-Chat profiles on other devices will continue to fully function.</p>
+<p>Jeśli używasz więcej niż jednego profilu czatu, możesz usunąć pojedyncze profile w górnym menu przełączania profili (na Androidzie i iOS) lub w pasku bocznym, klikając prawym przyciskiem myszy (w aplikacji na komputery). Profile czatu są usuwane tylko na urządzeniu, na którym nastąpiło usunięcie. Profile czatu na innych urządzeniach będą nadal w pełni działać.</p>
 
-<p>If you use a single default chat profile you can simply uninstall the app.
-This will still automatically trigger deletion of all associated address data on the chatmail server.
-For more info, please refer to <a href="https://nine.testrun.org/info.html#account-deletion">nine.testrun.org address-deletion</a> 
-or the respective page from your chosen <a href="https://chatmail.at/relays">3rd party chatmail server</a>.</p>
+<p>Jeśli używasz jednego domyślnego profilu czatu, możesz po prostu odinstalować aplikację. Spowoduje to automatyczne usunięcie wszystkich powiązanych danych adresowych na serwerze czatu. Aby uzyskać więcej informacji, zapoznaj się z informacjami o <a href="https://nine.testrun.org/info.html#account-deletion">usuwaniu adresów na stronie nine.testrun.org</a> lub odpowiednią stroną wybranego <a href="https://chatmail.at/relays">serwera czatu innej firmy</a>.</p>
     
       <h2 id="groups">
         
         
-          Groups <a href="#groups" class="anchor"></a>
+          Grupy <a href="#groups" class="anchor"></a>
         
         
       </h2>
 
-<p>Groups let several people chat together privately with <strong>equal rights</strong>.</p>
+<p>Grupy pozwalają kilku osobom na prywatną rozmowę na <strong>równych prawach</strong>.</p>
 
-<p>Anyone can
-change the group name or avatar,
-<a href="#addmembers">add or remove members</a>,
-set <a href="#ephemeralmsgs">disappearing messages</a>,
-and <a href="#edit">delete their own messages</a> from all member’s devices.</p>
+<p>Każdy może zmienić nazwę grupy lub awatar, <a href="#addmembers">dodawać lub usuwać członków</a>, ustawiać <a href="#ephemeralmsgs">znikające wiadomości</a> oraz <a href="#edit">usuwać własne wiadomości</a> z urządzeń wszystkich członków.</p>
 
-<p>Because all members have the same rights, groups work best among <strong>trusted friends and family</strong>.</p>
+<p>Ponieważ wszyscy członkowie mają te same uprawnienia, grupy najlepiej sprawdzają się w gronie <strong>zaufanych przyjaciół i rodziny</strong>.</p>
     
       <h3 id="tworzenie-grupy">
         
@@ -489,42 +445,41 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Wybierz <strong>Nowy czat</strong>, a następnie <strong>Nowa grupa</strong> z menu w prawym górnym rogu lub naciśnij odpowiedni przycisk na Androidzie / iOS.</li>
-  <li>Na następnym ekranie wybierz <strong>członków grupy</strong> i zdefiniuj <strong>nazwę grupy</strong>. Możesz też wybrać awatar <strong>grupy</strong>.</li>
-  <li>Zaraz po napisaniu pierwszej wiadomości w grupie wszyscy członkowie zostaną poinformowani o nowej grupie i mogą odpowiedzieć w grupie (jeżeli nie napiszesz wiadomości w grupie, grupa jest niewidoczna dla członków).</li>
+  <li>
+    <p>Wybierz <strong>Nowy czat</strong>, a następnie <strong>Nowa grupa</strong> z menu w prawym górnym rogu lub naciśnij odpowiedni przycisk na Androidzie / iOS.</p>
+  </li>
+  <li>
+    <p>Na następnym ekranie wybierz <strong>członków grupy</strong> i zdefiniuj <strong>nazwę grupy</strong>. Możesz też wybrać <strong>awatar grupy</strong>.</p>
+  </li>
+  <li>
+    <p>Gdy tylko napiszesz <strong>pierwszą wiadomość</strong> w grupie, wszyscy członkowie zostaną poinformowani o nowej grupie i będą mogli odpowiadać w grupie (dopóki nie napiszesz wiadomości w grupie, grupa będzie niewidoczna dla członków).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
         
         
-          Add and remove members <a href="#addmembers" class="anchor"></a>
+          Dodawanie i usuwanie członków <a href="#addmembers" class="anchor"></a>
         
         
       </h3>
 
+<p>Wszyscy członkowie grupy mają <strong>takie same uprawnienia</strong>. Z tego powodu każdy może usunąć dowolnego członka lub dodać nowych.</p>
+
 <ul>
   <li>
-    <p>All group members have the <strong>same rights</strong>.
-For this reason, everyone can delete any member or add new ones.</p>
+    <p>Aby <strong>dodać lub usunąć członków</strong>, dotknij nazwę grupy na czacie i wybierz członka, którego chcesz dodać lub usunąć.</p>
   </li>
   <li>
-    <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
+    <p>Jeśli członek nie znajduje się jeszcze na twojej liście kontaktów, ale rozmawiasz z nim <strong>twarzą w twarz</strong>, na tym samym ekranie pokaż mu <strong>kod QR</strong>.
+Poproś partnera czatu o <strong>zeskanowanie</strong> obrazu QR za pomocą aplikacji Delta Chat, dotykając <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> na ekranie głównym.</p>
   </li>
   <li>
-    <p>If the member is not yet in your contact list, but <strong>face to face</strong> with you,
-from the same screen, show a <strong>QR code</strong>.<br />
-Ask your chat partner to <strong>scan</strong> the QR image with their Delta Chat app by tapping
-<img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> on the main screen.</p>
-  </li>
-  <li>
-    <p>For a <strong>remote</strong> member addition,
-click “Copy” or “Share” and send the <strong>invite link</strong>
-through another private chat to the new member.</p>
+    <p>Aby dodać członka <strong>zdalnie</strong>, naciśnij „Kopiuj” lub „Udostępnij” i wyślij <strong>link zaproszenia</strong> nowemu członkowi za pośrednictwem innego prywatnego czatu.</p>
   </li>
 </ul>
 
-<p>QR code and invite link can be used to add several members.
-However, since groups are <a href="#groups">meant for trusted people</a>, avoid sharing them publicly.</p>
+<p>Kod QR i link zaproszenia można wykorzystać do dodania kilku członków. Ponieważ jednak grupy są <a href="#groups">przeznaczone dla zaufanych osób</a>, unikaj udostępniania ich publicznie.</p>
     
       <h3 id="usunąłem-się-przez-przypadek">
         
@@ -534,10 +489,7 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Ponieważ nie jesteś członkiem grupy, nie możesz dodać siebie ponownie. 
-Jednak nie ma problemu, po prostu poproś dowolnego członka grupy na normalnym czacie, aby dodał cię ponownie.</li>
-</ul>
+<p>Ponieważ nie jesteś członkiem grupy, nie możesz dodać siebie ponownie. Jednak nie ma problemu, po prostu poproś dowolnego członka grupy na normalnym czacie, aby dodał cię ponownie.</p>
     
       <h3 id="nie-chcę-już-otrzymywać-wiadomości-od-grupy">
         
@@ -548,39 +500,207 @@ Jednak nie ma problemu, po prostu poproś dowolnego członka grupy na normalnym
       </h3>
 
 <ul>
-  <li>
-    <p>Usuń siebie z listy członków lub usuń cały czat. 
-Jeśli później będziesz chciał ponownie dołączyć do grupy, poproś innego członka grupy, aby dodał cię do grupy.</p>
-  </li>
-  <li>
-    <p>Alternatywnie możesz też „Wyłączyć powiadomienia” dla grupy  dzięki temu otrzymasz wszystkie wiadomości i 
-nadal będziesz mógł pisać, ale nie będziesz już powiadamiany o żadnych nowych wiadomościach.</p>
-  </li>
+  <li>Usuń siebie z listy członków lub usuń cały czat. 
+Jeśli później będziesz chciał ponownie dołączyć do grupy, poproś innego członka grupy, aby dodał cię do grupy.</li>
 </ul>
+
+<p>Alternatywnie możesz też „Wyłączyć powiadomienia” dla grupy, dzięki temu otrzymasz wszystkie wiadomości i nadal będziesz mógł pisać, ale nie będziesz już powiadamiany o żadnych nowych wiadomościach.</p>
     
-      <h3 id="cloning-a-group">
+      <h3 id="klonowanie-grupy">
         
         
-          Cloning a group <a href="#cloning-a-group" class="anchor"></a>
+          Klonowanie grupy <a href="#klonowanie-grupy" class="anchor"></a>
         
         
       </h3>
 
-<p>You can duplicate a group to start a separate discussion
-or to exclude members without them noticing.</p>
+<p>Możesz zduplikować grupę, aby rozpocząć osobną dyskusję lub wykluczyć członków bez ich wiedzy.</p>
 
 <ul>
   <li>
-    <p>Open the group profile and tap <strong>Clone Chat</strong> (Android/iOS),
-or right-click the group in the chat list (Desktop).</p>
+    <p>Otwórz profil grupy i dotknij opcji <strong>Klonuj czat</strong> (Android/iOS) lub kliknij prawym przyciskiem myszy grupę na liście czatów (komputer).</p>
   </li>
   <li>
-    <p>Set a new name, choose an avatar, and adjust the member list if needed.</p>
+    <p>Ustaw nową nazwę, wybierz awatar i w razie potrzeby dostosuj listę członków.</p>
   </li>
 </ul>
 
-<p>The new group is <strong>fully independent</strong> from the original,
-which continues to work as before.</p>
+<p>Nowa grupa jest <strong>w pełni niezależna</strong> od oryginalnej, która nadal działa jak dotychczas.</p>
+    
+      <h3 id="ilu-członków-może-należeć-do-jednej-grupy">
+        
+        
+          Ilu członków może należeć do jednej grupy? <a href="#ilu-członków-może-należeć-do-jednej-grupy" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Nie ma ścisłego limitu technicznego, ale nie zaleca się przekraczania 150 osób.</p>
+
+<p>W miarę jak grupy się rozrastają, mogą stawać się niestabilne społecznie i wymagać hierarchii – gdzie Delta Chat pełni rolę prywatnego komunikatora do czatowania na <a href="#groups">równych prawach</a>. Więcej informacji znajdziesz w artykule <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Liczba Dunbara</a>.</p>
+    
+      <h2 id="channels">
+        
+        
+          Kanały <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Kanały to narzędzie typu jeden do wielu, służące do nadawania wiadomości.</p>
+    
+      <h3 id="subskrybowanie-kanału">
+        
+        
+          Subskrybowanie kanału <a href="#subskrybowanie-kanału" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Zeskanuj <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>kod QR</strong> lub naciśnij link zaproszenia otrzymany od właściciela kanału.</li>
+</ul>
+
+<p>To wszystko! Otrzymasz kilka wiadomości z historii kanału, a od tego momentu wszystkie nowe wiadomości z kanału.</p>
+
+<p><strong>Nie martw się</strong>, jeśli to nie nastąpi od razu. Gdy właściciel kanału będzie online, twoja prośba o dołączenie zostanie przetworzona.</p>
+
+<p>Podobnie jak cała platforma Delta Chat, również kanały są prywatne i zdecentralizowane, dlatego nie ma możliwości publicznego ujawnienia.</p>
+
+<p>Inni subskrybenci kanału nie zobaczą, że go subskrybujesz i nie będą mogli wysyłać ci wiadomości. Właściciel kanału może jednak napisać do ciebie. Zobaczy również, że przeczytałeś wiadomość, chyba że masz wyłączone potwierdzenia odczytu.</p>
+
+<p>Jeśli nie chcesz udostępniać swojego głównego profilu, możesz również utworzyć <a href="#multiple-accounts">dedykowany profil</a> do dołączenia do kanału.</p>
+    
+      <h3 id="tworzenie-kanału">
+        
+        
+          Tworzenie kanału <a href="#tworzenie-kanału" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Naciśnij <strong>Nowy cza</strong> i wybierz <strong>Nowy kanał</strong>.</p>
+  </li>
+  <li>
+    <p>Wprowadź <strong>nazwę</strong>, opcjonalnie ustaw <strong>obraz</strong> i <strong>opis</strong>, a następnie naciśnij przycisk <strong>Utwórz</strong>.</p>
+  </li>
+  <li>
+    <p>Możesz teraz wysyłać i zarządzać wiadomościami jak zwykle.</p>
+  </li>
+  <li>
+    <p>Z profilu kanału <strong>udostępnij kod QR lub link zaproszenia innym osobom</strong>.</p>
+  </li>
+</ul>
+
+<p>Subskrybenci będą otrzymywać twoje wiadomości, ale nie będą mogli wysyłać wiadomości na twoim kanale. Po zasubskrybowaniu otrzymają <strong>kilka najnowszych wiadomości z historii kanału</strong>.</p>
+
+<p>Obok każdej wiadomości jest widoczna <strong>liczba wyświetleń</strong>. Pamiętaj, że uwzględnia ona tylko subskrybentów z włączonymi potwierdzeniami odczytu, więc rzeczywista liczba wyświetleń może być wyższa.</p>
+    
+      <h3 id="ilu-subskrybentów-może-mieć-kanał">
+        
+        
+          Ilu subskrybentów może mieć kanał? <a href="#ilu-subskrybentów-może-mieć-kanał" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Kanały są przeznaczone dla znacznie większej publiczności niż <a href="#groups">grupy</a>.</p>
+
+<p>Praktyczny limit zależy od używanego <a href="#relays">przekaźnika</a>, więc nie ma jednej, stałej liczby, która obowiązywałaby wszędzie.</p>
+
+<p>W przypadku naprawdę dużych kanałów z dziesiątkami tysięcy subskrybentów zalecamy użycie <a href="#multiple-accounts">dedykowanego profilu</a> dla kanału i sprawdzenie, czy przekaźnik jest odpowiedni.</p>
+
+<p>Ale nie wahaj się zbytnio: Delta Chat został zaprojektowany tak, aby nie był zależny od przekaźnika, więc możesz go łatwo zmienić w dowolnym momencie – twoi obecni subskrybenci nawet tego nie zauważą. W takim przypadku wystarczy zaktualizować link zaproszenia udostępniany nowym subskrybentom.</p>
+    
+      <h2 id="calls">
+        
+        
+          Połączenia <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat umożliwia indywidualne <strong>połączenia audio i wideo</strong>.</p>
+
+<p>Połączenia są obsługiwane na komputerach stacjonarnych, Ubuntu Touch, iOS oraz Androidzie 8 i nowszych.</p>
+    
+      <h3 id="nawiązywanie-połączenia">
+        
+        
+          Nawiązywanie połączenia <a href="#nawiązywanie-połączenia" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>W czacie indywidualnym dotknij <strong>ikony połączenia</strong> 📞.</p>
+  </li>
+  <li>
+    <p>Otworzy się małe menu, w którym możesz wybrać, czy chcesz nawiązać <strong>połączenie audio</strong>, czy <strong>wideo</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="odbieranie-lub-odrzucanie-połączenia">
+        
+        
+          Odbieranie lub odrzucanie połączenia <a href="#odbieranie-lub-odrzucanie-połączenia" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Gdy ktoś do ciebie dzwoni, Delta Chat wyświetla <strong>ekran połączenia przychodzącego</strong> lub powiadomienie.</p>
+  </li>
+  <li>
+    <p>Dotknij <strong>Akceptuj</strong>, aby odebrać, lub <strong>Odrzuć</strong>, aby odrzucić połączenie.</p>
+  </li>
+</ul>
+    
+      <h3 id="w-trakcie-połączenia">
+        
+        
+          W trakcie połączenia <a href="#w-trakcie-połączenia" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Możesz <strong>wyciszyć</strong> mikrofon.</p>
+  </li>
+  <li>
+    <p>Możesz <strong>włączyć lub wyłączyć kamerę</strong>.</p>
+  </li>
+  <li>
+    <p>Na urządzeniach mobilnych możesz <strong>przełączać się między przednią i tylną kamerą</strong>.</p>
+  </li>
+</ul>
+
+<p>W zależności od urządzenia możesz również wybrać wyjście audio lub skorzystać z trybu obrazu w obrazie. Na komputerach stacjonarnych połączenie jest wyświetlane w dedykowanym oknie i możesz kontynuować korzystanie z głównego okna Delta Chat jak zwykle.</p>
+    
+      <h3 id="nieodebrane-połączenia-i-powiadomienia">
+        
+        
+          Nieodebrane połączenia i powiadomienia <a href="#nieodebrane-połączenia-i-powiadomienia" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Jeśli nie odbierzesz, nie usłyszysz dzwonka lub nie będziesz mieć urządzenia pod ręką, połączenie zostanie oznaczone jako <strong>nieodebrane</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Tylko zaakceptowane przez ciebie kontakty</strong> mogą wywołać dzwonek na urządzeniu. Prośby o kontakt będą wyświetlane normalnie i nie będą dzwonić.</p>
+  </li>
+  <li>
+    <p>W <strong>Ustawienia → Powiadomienia → Połączenia</strong> możesz całkowicie wyłączyć specjalny ekran dzwonka. Jeśli to zrobisz, nie będzie ci przeszkadzał żaden dzwonek, a połączenie nadal będzie można odebrać, dotykając w czacie dymku wiadomości o przychodzącym połączeniu.</p>
+  </li>
+</ul>
     
       <h2 id="webxdc">
         
@@ -834,8 +954,7 @@ Welcome to the power of the interoperable chatmail relay network :)</p>
     <p>Sprawdź dokładnie, czy oba urządzenia są w tym <strong>samym Wi-Fi lub tej samej sieci</strong></p>
   </li>
   <li>
-    <p>Na <strong>Windowsie</strong>, przejdź do <strong>Panel sterowania / Sieć i internet</strong> i upewnij się, że <strong>Sieć prywatna</strong> jest wybrana jako “Typ profilu sieci”
-(po przeniesieniu możesz wrócić do pierwotnej wartości)</p>
+    <p>Na <strong>Windowsie</strong>, przejdź do „Panel sterowania / Sieć i internet” i upewnij się, że <strong>Sieć prywatna</strong> jest wybrana jako „Typ profilu sieci” (po przeniesieniu możesz wrócić do pierwotnej wartości)</p>
   </li>
   <li>
     <p>W systemie <strong>iOS</strong> upewnij się, że jest przydzielony dostęp do opcji „Ustawienia » Aplikacje » Delta Chat » <strong>Sieć lokalna</strong>”</p>
@@ -879,15 +998,14 @@ Welcome to the power of the interoperable chatmail relay network :)</p>
 
 <ul>
   <li>
-    <p>Na starym urządzeniu przejdź do <strong>Ustawienia → Czaty i media → Eksport kopii zapasowej</strong>. Wprowadź swój PIN odblokowania ekranu, wzór lub hasło. Następnie możesz nacisnąć „Utwórz kopię”. Spowoduje to zapisanie pliku kopii zapasowej na urządzeniu. Teraz musisz jakoś przenieść go na inne urządzenie.</p>
+    <p>Na starym urządzeniu przejdź do <strong>Ustawienia → Czaty → Eksport kopii zapasowej</strong>. Wprowadź swój PIN odblokowania ekranu, wzór lub hasło. Następnie możesz nacisnąć „Utwórz kopię”. Spowoduje to zapisanie pliku kopii zapasowej na urządzeniu. Teraz musisz jakoś przenieść go na inne urządzenie.</p>
   </li>
   <li>
-    <p>Na nowym urządzeniu, na ekranie logowania, zamiast logować się na swoje konto e-mail, wybierz <strong>Przywróć z kopii zapasowej</strong>. Po zaimportowaniu Twoje rozmowy, klucze szyfrujące i multimedia powinny zostać skopiowane na nowe urządzenie.
-Jeśli korzystasz z iOS i napotykasz trudności, może <a href="https://support.delta.chat/t/import-backup-to-ios/1628">ten poradnik</a> Ci pomoże.</p>
+    <p>Na nowym urządzeniu wybierz: <strong>Mam już profil → Przywróć z kopii zapasowej</strong>. Jeśli korzystasz z iOS i napotykasz trudności, może <a href="https://support.delta.chat/t/import-backup-to-ios/1628">ten poradnik</a> ci pomoże.</p>
   </li>
 </ul>
 
-<p>Jesteś teraz zsynchronizowany i możesz używać obu urządzeń do wysyłania i odbierania wiadomości zaszyfrowanych end-to-end w komunikacji ze swoimi partnerami.</p>
+<p>Jesteś teraz zsynchronizowany i w komunikacji ze swoimi partnerami możesz używać obu urządzeń do wysyłania i odbierania wiadomości zaszyfrowanych metodą end-to-end.</p>
     
       <h3 id="czy-są-jakieś-plany-wprowadzenia-klienta-web-delta-chat">
         
@@ -911,10 +1029,10 @@ Jeśli korzystasz z iOS i napotykasz trudności, może <a href="https://support.
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -944,22 +1062,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1073,9 +1195,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Zobacz <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standardy używane w Delta Chat</a>.</li>
-</ul>
+<p>Zobacz <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standardy używane w Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1102,6 +1222,10 @@ weekly statistics will be automatically sent to a bot.</p>
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> służy do automatycznego ustanawiania szyfrowania typu end-to-end między kontaktami a wszystkimi członkami czatu grupowego.</p>
   </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
+  </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Udostępnienie kontaktu na czacie</a> umożliwia odbiorcom korzystanie z szyfrowania typu end-to-end z tym kontaktem.</p>
   </li>
@@ -1236,12 +1360,10 @@ even if the message was not end-to-end encrypted.</p>
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>Wszystkie pozostałe metadane dotyczące wiadomości, kontaktów i grup znajdują się w zaszyfrowanej metodą end-to-end części wiadomości.</p>
     
       <h3 id="device-seizure">
@@ -1262,6 +1384,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1288,11 +1433,13 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>Nie, jeszcze nie.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat obecnie nie obsługuje mechanizmu Perfect Forward Secrecy (PFS). Oznacza to, że jeśli twój prywatny klucz deszyfrujący zostanie ujawniony, a ktoś zdobędzie twoje wcześniejsze wiadomości w trakcie transmisji, będzie mógł je odszyfrować i odczytać za pomocą ujawnionego klucza deszyfrującego. Należy pamiętać, że mechanizm Forward Secrecy zwiększa bezpieczeństwo tylko w przypadku usuwania wiadomości. W przeciwnym razie osoba, która uzyska twoje klucze deszyfrujące, zazwyczaj będzie mogła uzyskać dostęp do wszystkich nieusuniętych wiadomości i nie będzie musiała odszyfrowywać żadnych wcześniej zebranych wiadomości.</p>
 
-<p>Opracowaliśmy metodę Forward Secrecy, która przeszła wstępną analizę niektórych kryptografów i ekspertów ds. wdrożeń, ale oczekuje na bardziej formalne opracowanie, które potwierdzi jej niezawodne działanie w federacyjnym przesyłaniu wiadomości i w przypadku korzystania z wielu urządzeń, zanim zostanie zaimplementowana w <a href="https://github.com/chatmail/core">rdzeniu chatmail</a>, co uczyniłoby ją dostępną we wszystkich <a href="https://chatmail.at/clients">klientach chatmail</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1302,9 +1449,13 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>Nie, jeszcze nie.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat korzysta z biblioteki Rust OpenPGP <a href="https://github.com/rpgp/rpgp">rPGP</a>, która obsługuje najnowszy <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">projekt OpenPGP IETF Post-Quantum-Cryptography</a>. Planujemy dodać obsługę PQC do <a href="https://github.com/chatmail/core">rdzenia chatmail</a> po sfinalizowaniu projektu w IETF we współpracy z innymi implementatorami OpenPGP.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="jak-mogę-ręcznie-sprawdzić-informacje-o-szyfrowaniu">
         
@@ -1362,7 +1513,7 @@ od najnowszych do najstarszych:</p>
     <p>W kwietniu 2023 r. naprawiliśmy problemy z bezpieczeństwem i prywatnością w funkcji „aplikacje internetowe udostępniane na czacie”, związane z awariami piaskownicy, szczególnie w przypadku Chromium. Następnie przeprowadziliśmy niezależny audyt bezpieczeństwa od Cure53 i wszystkie wykryte problemy zostały naprawione w aplikacji z serii 1.36 wydanej w kwietniu 2023 r. <a href="https://delta.chat/en/2023-05-22-webxdc-security">Pełną historię bezpieczeństwa end-to-end w sieci można znaleźć tutaj</a>.</p>
   </li>
   <li>
-    <p>W marcu 2023 r. firma <a href="https://cure53.de">Cure53</a> przeanalizowała zarówno szyfrowanie transportu połączeń sieciowych Delta Chat, jak i powtarzalną konfigurację serwera pocztowego zgodnie z <a href="https://delta.chat/pl/serverguide">zaleceniami na tej stronie</a>. Możesz przeczytać więcej o audycie <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">na naszym blogu</a> lub przeczytać pełny raport <a href="https://delta.chat/assets/blog/MER-01-report.pdf">tutaj</a>.</p>
+    <p>W marcu 2023 r. firma <a href="https://cure53.de">Cure53</a> przeanalizowała zarówno szyfrowanie transportu połączeń sieciowych Delta Chat, jak i powtarzalną konfigurację serwera pocztowego zgodnie z <a href="https://delta.chat/serverguide">zaleceniami na tej stronie</a>. Możesz przeczytać więcej o audycie <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">na naszym blogu</a> lub przeczytać pełny raport <a href="https://delta.chat/assets/blog/MER-01-report.pdf">tutaj</a>.</p>
   </li>
   <li>
     <p>W 2020 r. firma <a href="https://includesecurity.com">Include Security</a> przeanalizowała biblioteki Rust <a href="https://github.com/deltachat/deltachat-core-rust/">core</a>, <a href="https://github.com/async-email/async-imap">IMAP</a>, <a href="https://github.com/async-email/async-smtp">SMTP</a> i <a href="https://github.com/async-email/async-native-tls">TLS</a> Delta Chat. Nie znalazła żadnych problemów krytycznych ani poważnych. W raporcie zwrócono uwagę na kilka słabych punktów o średniej wadze – same w sobie nie stanowią zagrożenia dla użytkowników Delta Chat, ponieważ zależą od środowiska, w którym używany jest Delta Chat. Ze względu na użyteczność i kompatybilność nie możemy złagodzić wszystkich z nich i zdecydowaliśmy się przedstawić zalecenia dotyczące bezpieczeństwa zagrożonym użytkownikom. Pełny raport można przeczytać <a href="https://delta.chat/assets/blog/2020-second-security-review.pdf">tutaj</a>.</p>
@@ -1437,31 +1588,20 @@ Raczej korzystamy z publicznych źródeł finansowania, jak dotąd pochodzących
 
 <ul>
   <li>
-    <p>Unijny projekt <a href="https://nextleap.eu">NEXTLEAP</a> sfinansował badania i wdrożenie zweryfikowanych grup i ustawień protokołów kontaktowych w latach 2017 i 2018, a także pomógł zintegrować szyfrowanie end-to-end poprzez <a href="https://autocrypt.org">Autocrypt</a>.</p>
+    <p>W latach 2023 i 2024 zostaliśmy przyjęci do programu Next Generation Internet (NGI) za naszą pracę w <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>, wraz z partnerami współpracującymi pracującymi nad <a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, <a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, <a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> i <a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. Wszystkie te projekty są częściowo ukończone lub zostaną ukończone na początku 2025 r.</p>
+  </li>
+  <li>
+    <p>W 2021 r. otrzymaliśmy kolejne dofinansowanie z UE na dwie propozycje dotyczące Internetu nowej generacji, a mianowicie na <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD – katalog przenośności dostawcy poczty e-mail</a> ( ~97 tys. EUR) i <a href="https://nlnet.nl/project/EmailPorting/">AEAP – przenoszenie adresu e-mail</a> (~90 tys. EUR), co zaowocowało lepszą obsługą wielu kont, ulepszonymi kontaktami i ustawieniami grup za pomocą kodów QR oraz wieloma ulepszeniami sieciowymi na wszystkich platformach.</p>
+  </li>
+  <li>
+    <p><a href="https://nlnet.nl/">Fundacja NLnet</a> przekazała w latach 2019/2020 kwotę 46 tys. EUR na wykonanie wiązań Rust/Python i uruchomienie ekosystemu Chat-bot.</p>
   </li>
   <li>
     <p><a href="https://opentechfund.org">Open Technology Fund</a> przyznał nam pierwszy grant w 2018/2019 (~200 000 $), dzięki któremu znacznie ulepszyliśmy aplikację na Androida i wydaliśmy pierwszą wersję beta aplikacji na komputery stacjonarne, a także ugruntował rozwój naszych funkcji w badaniach UX w kontekście praw człowieka, zobacz nasz końcowy raport <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX</a>.
 Druga dotacja w 2019/2020 (~300 000 4) pomogła nam wydać wersje Delta/iOS, przekonwertować naszą podstawową bibliotekę na Rust i zapewnić nowe funkcje dla wszystkich platform.</p>
   </li>
   <li>
-    <p><a href="https://nlnet.nl/">Fundacja NLnet</a> przekazała w latach 2019/2020 kwotę 46 tys. EUR na wykonanie wiązań Rust/Python i uruchomienie ekosystemu Chat-bot.</p>
-  </li>
-  <li>
-    <p>In 2021 we received further EU funding for two Next-Generation-Internet
-proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
-  </li>
-  <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
-  </li>
-  <li>
-    <p>W latach 2023-2024 pomyślnie ukończyliśmy finansowany przez OTF <a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">projekt Secure Chatmail</a>, co pozwoliło nam wprowadzić gwarantowane szyfrowanie, stworzyć <a href="https://delta.chat/chatmail">sieć serwerów chatmail</a> i zapewnić „natychmiastowe wdrażanie” we wszystkich aplikacjach wydanych od kwietnia 2024 r.</p>
-  </li>
-  <li>
-    <p>W latach 2023 i 2024 zostaliśmy przyjęci do programu Next Generation Internet (NGI) za naszą pracę w <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>, wraz z partnerami współpracującymi pracującymi nad <a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, <a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, <a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> i <a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. Wszystkie te projekty są częściowo ukończone lub zostaną ukończone na początku 2025 r.</p>
+    <p>Unijny projekt <a href="https://nextleap.eu">NEXTLEAP</a> sfinansował badania i wdrożenie zweryfikowanych grup i ustawień protokołów kontaktowych w latach 2017 i 2018, a także pomógł zintegrować szyfrowanie end-to-end poprzez <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Czasami otrzymujemy jednorazowe darowizny od osób prywatnych. Na przykład w 2021 roku pewna hojna osoba przekazała nam 4K EUR w formie przelewu bankowego tytułem “kontynuujcie dobry rozwój!”. 💜 Takie pieniądze przeznaczamy na finansowanie spotkań rozwojowych lub na doraźne wydatki, których nie da się łatwo przewidzieć lub zrefundować z publicznych dotacji. Otrzymywanie większej ilości darowizn pomaga nam również stać się bardziej niezależnymi i długoterminowo rentownymi jako społeczność współpracowników.</p>

src/main/assets/help/ru/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">Как найти людей для общения?</a></li>
       <li><a href="#почему-чат-помечен-как-запрос">Почему чат помечен как “Запрос”?</a></li>
       <li><a href="#как-я-могу-связать-двух-своих-друзей-друг-с-другом">Как я могу связать двух своих друзей друг с другом?</a></li>
-      <li><a href="#поддерживает-ли-delta-chat-изображения-видео-и-другие-вложения">Поддерживает ли Delta Chat изображения, видео и другие вложения?</a></li>
       <li><a href="#multiple-accounts">Что такое профили? Как я могу переключатся между ними?</a></li>
       <li><a href="#кто-видит-изображение-моего-профиля">Кто видит изображение моего профиля?</a></li>
       <li><a href="#signature">Могу ли я установить статус/подпись в Delta Chat?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#что-означает-зеленая-точка">Что означает зеленая точка?</a></li>
       <li><a href="#что-означают-галочки-рядом-с-исходящими-сообщениями">Что означают галочки рядом с исходящими сообщениями?</a></li>
       <li><a href="#edit">Исправление опечаток и удаление сообщений после отправки</a></li>
+      <li><a href="#mediaquality">Как обеспечивается качество мультимедиа?</a></li>
       <li><a href="#ephemeralmsgs">Как работают исчезающие сообщения?</a></li>
-      <li><a href="#delold">Что произойдет, если я включу функцию “Удалять старые сообщения с устройства”?</a></li>
+      <li><a href="#delold">Что произойдет, если я включу функцию “Удалять сообщения с устройства”?</a></li>
       <li><a href="#remove-account">Как удалить свой профиль в чате?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#я-случайно-удалил-самого-себя">Я случайно удалил самого себя.</a></li>
       <li><a href="#я-больше-не-хочу-получать-сообщения-группы">Я больше не хочу получать сообщения группы.</a></li>
       <li><a href="#клонирование-группы">Клонирование группы</a></li>
+      <li><a href="#сколько-участников-может-быть-в-одной-группе">Сколько участников может быть в одной группе?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Каналы</a>
+    <ul>
+      <li><a href="#подписка-на-канал">Подписка на канал</a></li>
+      <li><a href="#создание-канала">Создание канала</a></li>
+      <li><a href="#какое-максимальное-количество-подписчиков-может-быть-у-канала">Какое максимальное количество подписчиков может быть у канала?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Звонки</a>
+    <ul>
+      <li><a href="#как-сделать-звонок">Как сделать звонок</a></li>
+      <li><a href="#принять-или-отклонить-вызов">Принять или отклонить вызов</a></li>
+      <li><a href="#во-время-звонка">Во время звонка</a></li>
+      <li><a href="#пропущенные-вызовы-и-уведомления">Пропущенные вызовы и уведомления</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">Встроенные приложения чата</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#расширенные">Расширенные</a>
     <ul>
-      <li><a href="#экспериментальные-функции">Экспериментальные функции</a></li>
+      <li><a href="#experiments">Экспериментальные функции</a></li>
       <li><a href="#relays">Что такое релеи chatmail?</a></li>
       <li><a href="#могу-ли-я-использовать-обычный-адрес-электронной-почты-с-delta-chat">Могу ли я использовать обычный адрес электронной почты с Delta Chat?</a></li>
       <li><a href="#classic-email">Как настроить профиль чата с использованием классического адреса электронной почты в качестве релея?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Видны ли в Интернете сообщения, отмеченные значком почты?</a></li>
       <li><a href="#message-metadata">Как Delta Chat защищает метаданные в сообщениях?</a></li>
       <li><a href="#device-seizure">Как защитить метаданные и контакты при изъятии устройства?</a></li>
+      <li><a href="#кто-видит-мой-ip-адрес">Кто видит мой IP-адрес?</a></li>
       <li><a href="#sealedsender">Поддерживает ли Delta Chat функцию “Sealed Sender” (Засекреченный отправитель)?</a></li>
       <li><a href="#pfs">Поддерживает ли Delta Chat свойство Perfect forward secrecy, PFS (Совершенную прямую секретность)?</a></li>
       <li><a href="#pqc">Поддерживает ли Delta Chat Post-Quantum-Cryptography (Постквантовую криптографию)?</a></li>
@@ -185,7 +202,8 @@
 <p>Поскольку это приватный мессенджер,
 писать вам могут только друзья и члены семьи, с которыми вы <a href="#howtoe2ee">поделились QR-кодом или ссылкой-приглашением.</a></p>
 
-<p>Ваши друзья могут поделиться вашим контактом с другими друзьями, это отображается как <strong>запрос</strong>.</p>
+<p>Ваши друзья могут поделиться вашим контактом с другими друзьями,
+это отображается как <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Запрос</b></p>
 
 <p>— Нужно <strong>принять</strong> запрос, прежде чем ответить.</p>
 
@@ -211,24 +229,6 @@
 <p>Второй контакт получит <strong>карточку</strong>
 на которую можно нажать, чтобы начать общение с первым контактом.</p>
     
-      <h3 id="поддерживает-ли-delta-chat-изображения-видео-и-другие-вложения">
-        
-        
-          Поддерживает ли Delta Chat изображения, видео и другие вложения? <a href="#поддерживает-ли-delta-chat-изображения-видео-и-другие-вложения" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Да. Изображения, видео, файлы, голосовые сообщения и т.д. можно отправлять с помощью кнопок <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Вложение</strong>
-или <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Голосовое сообщение</strong>.</p>
-  </li>
-  <li>
-    <p>Для лучшей производительности изображения по умолчанию оптимизируются и отправляются в меньшем размере, но вы можете отправить их как “файл”, чтобы сохранить оригинал.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -258,16 +258,11 @@
         
       </h3>
 
-<ul>
-  <li>
-    <p>Вы можете добавить изображение профиля в настройках. Если вы пишете своим контактам
+<p>Вы можете добавить изображение профиля в настройках. Если вы пишете своим контактам
 или добавляете их с помощью QR-кода, они автоматически видят его как изображение вашего профиля.</p>
-  </li>
-  <li>
-    <p>По соображениям конфиденциальности, никто не увидит изображение вашего профиля,
-пока вы не напишете им сообщение.</p>
-  </li>
-</ul>
+
+<p>По соображениям конфиденциальности, никто не увидит изображение вашего профиля, пока вы не напишете
+им сообщение.</p>
     
       <h3 id="signature">
         
@@ -301,7 +296,8 @@
   </li>
   <li>
     <p><strong>Отправить в архив</strong> необходимо, если вы не хотите больше видеть их в списке чатов.
-Архивные чаты остаются доступными над списком чатов или через поиск.</p>
+Архивные чаты остаются доступными над списком чатов или через поиск
+и будут отмечены как <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Архивировано</b></p>
   </li>
   <li>
     <p>Когда в чат, находящийся в архиве, приходит новое сообщение, если не включена опция <strong>Отключить уведомления</strong>, он <strong>Возвращается из архива</strong> в ваш список чатов.
@@ -336,7 +332,7 @@
 вы можете вернуться к этому сообщению в исходном чате</p>
   </li>
   <li>
-    <p>Наконец, вы также можете использовать “Сохраненные сообщения” для создания <strong>личных заметок</strong> - откройте чат, введите что-то, добавьте фото или голосовое сообщение и т.д.</p>
+    <p>Наконец, вы можете использовать “Сохраненные сообщения”, для создания <strong>личных заметок</strong> - откройте чат, напечатайте что-нибудь, добавьте фото или голосовое сообщение и т.д.</p>
   </li>
   <li>
     <p>Поскольку “Сохраненные сообщения” синхронизируются, они могут стать удобным способом передачи данных между устройствами</p>
@@ -372,22 +368,18 @@
 <ul>
   <li>
     <p><strong>Одна галочка</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-означает, что сообщение было успешно отправлено вашему провайдеру.</p>
+означает, что сообщение успешно отправлено на <a href="#relays">релей</a>.</p>
   </li>
   <li>
     <p><strong>Две галочки</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-означают, что по крайней мере одно устройство получателя
-сообщило об успешном получении сообщения.</p>
-  </li>
-  <li>
-    <p>Получатели могли отключить подтверждения прочтения,
-поэтому даже если вы видите только одну галочку, сообщение могло быть прочитано.</p>
-  </li>
-  <li>
-    <p>И наоборот, две галочки не обязательно означают
-что человек прочитал или понял сообщение ;)</p>
+указывают на то, что ваш контакт прочитал сообщение.</p>
   </li>
 </ul>
+
+<p>В <a href="#groups">группах</a> вторая галочка означает, что хотя бы один из участников подтвердил прочтение сообщения.</p>
+
+<p>Вторая галочка появится только в том случае, если у вас и хотя бы одного из получателей, прочитавшего сообщение,
+включена опция <strong>Настройки → Чаты → Уведомление о прочтении</strong>.</p>
     
       <h3 id="edit">
         
@@ -416,6 +408,32 @@
 <p>Обратите внимание, что исходное сообщение все еще может быть получено участниками чата
 которые могли уже ответить, переслать, сохранить, сделать скриншот или иным образом скопировать сообщение.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          Как обеспечивается качество мультимедиа? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Изображения, видео, файлы, голосовые сообщения и т.д. можно отправлять с помощью кнопок <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Вложение</strong>
+или <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Голосовое сообщение</strong>.</p>
+
+<ul>
+  <li>
+    <p>По умолчанию сжатие обеспечивает <strong>быструю и эффективную доставку</strong> сообщений, учитывая ограничения по объему данных и хранилищу у всех пользователей.
+Это идеально подходит для повседневного общения.</p>
+  </li>
+  <li>
+    <p>В регионах с плохим качеством связи,
+вы можете выбрать более высокую степень сжатия в меню <strong>Настройки → Чаты → Качество отправляемых медиафайлов</strong>.</p>
+  </li>
+  <li>
+    <p>Если вам необходимо отправить мультимедийный файл в <strong>исходном качестве</strong>, используйте значок <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Прикрепить → Файл</strong> в чате.
+Используйте этот метод с осторожностью, так как отправка файлов в исходном качестве значительно увеличит объем трафика как для вас, так и для всех участников чата.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -452,18 +470,18 @@
       <h3 id="delold">
         
         
-          Что произойдет, если я включу функцию “Удалять старые сообщения с устройства”? <a href="#delold" class="anchor"></a>
+          Что произойдет, если я включу функцию “Удалять сообщения с устройства”? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>Если вы хотите сэкономить место на устройстве, вы можете выбрать
-автоматическое удаление старых сообщений.</li>
-  <li>Чтобы включить эту функцию, перейдите в “Удалять сообщения с устройства” в настройках “Чаты и медиафайлы”
-Вы можете установить период от “Через 1 час” до “Через 1 год”;
-Таким образом, <em>все</em> сообщения будут удалены с устройства, как только они станут старше выбранного срока.</li>
-</ul>
+<p>Если вы хотите сэкономить место на устройстве, можно выбрать функцию автоматического удаления старых
+сообщений.</p>
+
+<p>Чтобы включить эту функцию, перейдите в <strong>Настройки → Чаты → Удалять сообщения с устройства</strong>.
+Вы можете установить временные рамки от “через 1 час” до “через 1 год”;
+Таким образом, <em>все</em> сообщения будут удаляться с вашего устройства, как только они станут
+старше выбранного срока.</p>
     
       <h3 id="remove-account">
         
@@ -511,9 +529,15 @@
       </h3>
 
 <ul>
-  <li>Выберите <strong>Новый чат</strong>, а затем <strong>Новая группа</strong> из меню в правом верхнем углу или нажмите соответствующую кнопку на Android/iOS.</li>
-  <li>На следующем экране выберите <strong>участников</strong> и придумайте <strong>название группы</strong>. Вы также можете выбрать <strong>изображение группы</strong>.</li>
-  <li>Как только вы напишете <strong>первое сообщение</strong> в группе, все участники будут проинформированы о новой группе и смогут ответить. (Пока вы не напишете сообщение в группе, группа будет невидима для участников).</li>
+  <li>
+    <p>Выберите <strong>Новый чат</strong>, а затем <strong>Новая группа</strong> из меню в правом верхнем углу или нажмите соответствующую кнопку на Android/iOS.</p>
+  </li>
+  <li>
+    <p>На следующем экране выберите <strong>участников группы</strong> и придумайте <strong>название группы</strong>. Вы также можете выбрать <strong>аватар группы</strong>.</p>
+  </li>
+  <li>
+    <p>Как только вы напишете <strong>первое сообщение</strong> в группе, все участники будут проинформированы о новой группе и смогут ответить. (Пока вы не напишете сообщение в группе, группа будет невидима для участников).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -524,11 +548,10 @@
         
       </h3>
 
+<p>Все участники группы имеют <strong>одинаковые права</strong>.
+Поэтому каждый может удалить любого участника или добавить нового.</p>
+
 <ul>
-  <li>
-    <p>У всех участников группы <strong>одинаковые права</strong>.
-Поэтому каждый может удалить любого участника или добавить новых.</p>
-  </li>
   <li>
     <p>Чтобы <strong>добавлять или удалять участников</strong>, коснитесь названия группы в чате и выберите участника, которого нужно добавить или удалить.</p>
   </li>
@@ -556,10 +579,8 @@
         
       </h3>
 
-<ul>
-  <li>Поскольку вы больше не являетесь участником группы, вы не можете добавлять себя снова. 
-Однако, это не проблема, просто попросите любого другого участника группы в обычном чате добавить вас снова.</li>
-</ul>
+<p>Поскольку вы больше не являетесь участником группы, вы не можете добавить себя снова. 
+Однако, это не проблема, просто попросите любого другого участника группы в обычном чате добавить вас снова.</p>
     
       <h3 id="я-больше-не-хочу-получать-сообщения-группы">
         
@@ -570,14 +591,12 @@
       </h3>
 
 <ul>
-  <li>
-    <p>Либо удалите себя из списка участников, либо удалите весь чат. 
-Если позже вы снова захотите присоединиться к группе, попросите другого участника группы добавить вас.</p>
-  </li>
-  <li>
-    <p>Или, вместо этого, вы можете “отключить уведомления” для группы — это означает, что вы будете получать все сообщения и сможете их писать, но больше не будете получать уведомления о новых сообщениях.</p>
-  </li>
+  <li>Либо удалите себя из списка участников, либо удалите весь чат. 
+Если позже вы снова захотите присоединиться к группе, попросите другого участника группы добавить вас.</li>
 </ul>
+
+<p>Или, вместо этого, вы можете “отключить уведомления” для  группы - в этом случае вы будете получать все сообщения и 
+можете их писать, но больше не будете получать уведомления о новых сообщениях.</p>
     
       <h3 id="клонирование-группы">
         
@@ -603,6 +622,212 @@
 <p>Новая группа <strong>полностью независима</strong> от исходной,
 которая продолжает работать как прежде.</p>
     
+      <h3 id="сколько-участников-может-быть-в-одной-группе">
+        
+        
+          Сколько участников может быть в одной группе? <a href="#сколько-участников-может-быть-в-одной-группе" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Строгого технического ограничения нет,
+но не рекомендуется создавать группы больше 150 участников.</p>
+
+<p>По мере увеличения размера групп они могут стать социально нестабильными и потребовать иерархии, 
+в то время как Delta Chat - это приватный мессенджер для общения на <a href="#groups">равных правах</a>.
+Смотрите <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">число Данбара</a> для более глубокого понимания.</p>
+    
+      <h2 id="channels">
+        
+        
+          Каналы <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Каналы представляют собой инструмент типа “один-ко-многим” для трансляции сообщений.</p>
+    
+      <h3 id="подписка-на-канал">
+        
+        
+          Подписка на канал <a href="#подписка-на-канал" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Отсканируйте <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR-код</strong>
+или нажмите на ссылку-приглашение, которую вы получили от владельца канала.</li>
+</ul>
+
+<p>Всё готово!
+Сначала вы получите несколько сообщений из истории канала,
+а затем — все новые сообщения, поступающие в него.</p>
+
+<p><strong>Не беспокойтесь,</strong> если это произойдет не сразу.
+Как только владелец канала выйдет в сеть, ваш запрос на вступление будет обработан.</p>
+
+<p>Как и весь Delta Chat, каналы являются приватными и децентрализованными,
+поэтому возможность публичного поиска каналов отсутствует.</p>
+
+<p>Другие подписчики канала не увидят факта вашей подписки и не смогут отправлять вам сообщения.
+Однако, владелец канала сможет отправить вам сообщение.
+Также он будет видеть, что вы прочитали сообщение, если только вы не отключите подтверждение о прочтении.</p>
+
+<p>Если вы не хотите использовать свой основной профиль,
+вы можете создать <a href="#multiple-accounts">специальный профиль</a> для подписки на канал.</p>
+    
+      <h3 id="создание-канала">
+        
+        
+          Создание канала <a href="#создание-канала" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Нажмите <strong>Новый чат</strong> и выберите <strong>Новый канал</strong>.</p>
+  </li>
+  <li>
+    <p>Введите <strong>название</strong>, по желанию добавьте <strong>изображение</strong> и <strong>описание</strong>, а затем нажмите кнопку <strong>Создать</strong>.</p>
+  </li>
+  <li>
+    <p>Теперь вы можете отправлять сообщения и управлять ими в обычном режиме.</p>
+  </li>
+  <li>
+    <p>В профиле канала вы можете <strong>поделиться QR-кодом или ссылкой-приглашением с другими пользователями</strong>.</p>
+  </li>
+</ul>
+
+<p>Подписчики будут получать ваши сообщения,
+но не смогут отправлять сообщения в вашем канале.
+При подписке они получат <strong>несколько последних сообщений из истории канала</strong>.</p>
+
+<p>Рядом с каждым сообщением вы можете увидеть <strong>количество просмотров</strong>.
+Обратите внимание, что учитываются только те подписчики, у которых включены уведомления о прочтении,
+поэтому реальное количество просмотров может быть больше.</p>
+    
+      <h3 id="какое-максимальное-количество-подписчиков-может-быть-у-канала">
+        
+        
+          Какое максимальное количество подписчиков может быть у канала? <a href="#какое-максимальное-количество-подписчиков-может-быть-у-канала" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Каналы предназначены для гораздо более широкой аудитории, чем <a href="#groups">группы</a>.</p>
+
+<p>Практический предел зависит от используемого <a href="#relays">релея</a>,
+поэтому не существует единого фиксированного значения, применимого во всех случаях.</p>
+
+<p>Для крайне крупных каналов с десятками тысяч подписчиков,
+мы рекомендуем использовать <a href="#multiple-accounts">специальный профиль</a> для управления каналом,
+а также предварительно проверить пригодность релея.</p>
+
+<p>Не стоит опасаться: архитектура Delta Chat позволяет использовать любой релей (relay-agnostic),
+поэтому вы можете легко изменить его в любой момент -
+ваши текущие подписчики этого даже не заметят.
+В этом случае достаточно будет обновить ссылку-приглашение, которую вы передаёте новым пользователям.</p>
+    
+      <h2 id="calls">
+        
+        
+          Звонки <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat поддерживает <strong>аудио-</strong> и <strong>видеозвонки</strong> в режиме “один-на-один”.</p>
+
+<p>Звонки работают на ПК, Ubuntu Touch, iOS и Android версии 8 и новее.</p>
+    
+      <h3 id="как-сделать-звонок">
+        
+        
+          Как сделать звонок <a href="#как-сделать-звонок" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>В чате “один-на-один” нажмите на 📞 <strong>значок вызова</strong>.</p>
+  </li>
+  <li>
+    <p>Откроется небольшое меню
+в котором вы сможете выбрать вид связи <strong>аудио-</strong> или <strong>видеозвонок</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="принять-или-отклонить-вызов">
+        
+        
+          Принять или отклонить вызов <a href="#принять-или-отклонить-вызов" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>При входящем звонке,
+Delta Chat показывает <strong>экран входящего вызова</strong> или уведомление.</p>
+  </li>
+  <li>
+    <p>Нажмите <strong>Принять</strong> чтобы ответить
+или <strong>Отклонить</strong> чтобы сбросить звонок.</p>
+  </li>
+</ul>
+    
+      <h3 id="во-время-звонка">
+        
+        
+          Во время звонка <a href="#во-время-звонка" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Вы можете <strong>отключить</strong> звук микрофона.</p>
+  </li>
+  <li>
+    <p>Вы можете <strong>включить или выключить камеру</strong>.</p>
+  </li>
+  <li>
+    <p>На мобильных устройствах можно <strong>переключаться между фронтальной и основной камерами</strong>.</p>
+  </li>
+</ul>
+
+<p>В зависимости от устройства вы можете выбрать источник аудиовыхода или использовать режим “картинка в картинке”.
+В приложении для ПК звонок осуществляется в отдельном окне,
+что позволяет продолжать работу в основном окне Delta Chat в обычном режиме.</p>
+    
+      <h3 id="пропущенные-вызовы-и-уведомления">
+        
+        
+          Пропущенные вызовы и уведомления <a href="#пропущенные-вызовы-и-уведомления" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Если вы не ответите на звонок, не услышите сигнал или ваше устройство будет недоступно,
+вызов отобразится как <strong>пропущенный</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Только ваши подтвержденные контакты</strong> могут заставить ваше устройство звонить.
+Запросы на добавление в контакты будут приходить как обычно, но вызова не будет.</p>
+  </li>
+  <li>
+    <p>В разделе <strong>Настройки → Уведомления → Звонки</strong>,
+вы можете полностью отключить специальный экран входящего вызова.
+Если вы это сделаете, никакие уведомления о звонках не будут вас беспокоить;
+при этом вы всё равно сможете принять звонок, нажав на иконку сообщения о входящем звонке в соответствующем чате.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -890,9 +1115,9 @@ Push-уведомления автоматически активируются
     <p>Перепроверьте, что оба устройства находятся <strong>в одной Wi-Fi или локальной сети</strong>.</p>
   </li>
   <li>
-    <p>В <strong>Windows</strong> перейдите в <strong>Панель управления / Сеть и Интернет</strong>
+    <p>В <strong>Windows</strong> перейдите в “Панель управления / Сеть и Интернет”
 и убедитесь, что в качестве “Типа сетевого профиля” выбрана <strong>Частная сеть</strong>.
-(после передачи, вы можете изменить обратно на исходное значение)</p>
+(после передачи можно вернуть исходное значение)</p>
   </li>
   <li>
     <p>На <strong>iOS</strong>, убедитесь, что предоставлен доступ “Настройки системы / Приложения / Delta Chat / <strong>Локальная сеть</strong>”</p>
@@ -985,10 +1210,10 @@ PIN-код разблокировки экрана, графический кл
         
       </h2>
     
-      <h3 id="экспериментальные-функции">
+      <h3 id="experiments">
         
         
-          Экспериментальные функции <a href="#экспериментальные-функции" class="anchor"></a>
+          Экспериментальные функции <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1018,22 +1243,26 @@ PIN-код разблокировки экрана, графический кл
 <p>По умолчанию, после установки, релей <strong>настраивается автоматически</strong>,
 поэтому вам не нужно об этом волноваться.
 Однако, если хотите,
-вы можете настроить релеи в <strong>Настройки → Дополнительно → Релеи</strong>:</p>
+вы можете настроить релеи в меню <strong>Настройки → Дополнительно → Релеи</strong>:</p>
 
 <ul>
   <li>
     <p>Вы можете <strong>добавить</strong> релей, отсканировав его QR-код;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> содержит список известных релеев.
-Если у вас несколько релеев, вы будете получать сообщения на все из них.</p>
+на сайте <a href="https://chatmail.at/relays">chatmail.at/relays</a> представлен список известных.
+Если у вас настроено несколько релеев, сообщения будут доставляться через все из них.
+Ваши контакты автоматически узнают о текущих используемых вами релеях при обмене сообщениями.</p>
   </li>
   <li>
-    <p><strong>По умолчанию</strong> определяет релей, на который ваши собеседники будут отправлять будущие сообщения.</p>
+    <p>Нажмите на релей, чтобы установить его как <strong>используемый для отправки</strong>.</p>
   </li>
   <li>
-    <p>Если вы <strong>удаляете</strong> релей,
-убедитесь, что другой релей по умолчанию использовался в течение достаточного количества времени.
-В противном случае сообщения от ваших собеседников не будут доходить до вас.
-Если сомневаетесь, удалите его позже.</p>
+    <p>Если вы <strong>удалите</strong> релей,
+контакты, которые знают только этот релей, не смогут связаться с вами до тех пор, пока вы снова не напишите им.
+Чтобы оставаться на связи в это время, выберите опцию <strong>Скрыть из контактов</strong> во всплывающем окне
+вместо того, чтобы удалять его сразу.</p>
+  </li>
+  <li>
+    <p>Чтобы снова <strong>показать</strong> скрытый релей, нажмите на него.</p>
   </li>
 </ul>
 
@@ -1146,9 +1375,7 @@ Chatmail использует INBOX по умолчанию для ретран
         
       </h3>
 
-<ul>
-  <li>Смотрите <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Стандарты, используемые в Delta Chat</a>.</li>
-</ul>
+<p>Смотрите <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Стандарты, используемые в Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1177,6 +1404,10 @@ Chatmail использует INBOX по умолчанию для ретран
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> используется для автоматической
 настройки сквозного шифрования между контактами и всеми членами группового чата.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, полное внедрение которого запланировано на 2026 год, 
+обеспечит поддержку постквантового шифрования и прямой секретности.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Обмен контактом в
@@ -1361,12 +1592,10 @@ Delta Chat вместо этого использует реализацию Ope
 <p>Таким образом, серверы могут видеть только:</p>
 
 <ul>
-  <li>адрес отправителя и получателя</li>
-  <li>а также размер сообщения.</li>
+  <li>Адреса отправителя и получателя, по умолчанию генерируются случайным образом</li>
+  <li>Размер сообщения</li>
 </ul>
 
-<p>По умолчанию адреса генерируются случайным образом.</p>
-
 <p>Все прочие метаданные сообщений, контактов и групп содержатся в части сообщений, защищённой сквозным шифрованием.</p>
     
       <h3 id="device-seizure">
@@ -1387,6 +1616,29 @@ Delta Chat вместо этого использует реализацию Ope
 Кроме того, если устройство изъято, контакты, использующие временные профили,
 не могут быть легко идентифицированы.</p>
     
+      <h3 id="кто-видит-мой-ip-адрес">
+        
+        
+          Кто видит мой IP-адрес? <a href="#кто-видит-мой-ip-адрес" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Используемым <a href="#relays">релеям</a> необходимо знать ваш IP-адрес,
+а в некоторых случаях — данные устройств ваших контактов, если вы совершаете <a href="#calls">вызов</a>
+или совместно используете <a href="#webxdc">приложения</a>.</p>
+
+<p>IP-адреса необходимы для обеспечения связи и эффективной работы.
+Delta Chat не сохраняет их и не раскрывает третьим лицам.
+Обратите внимание, что IP-адрес
+— это не тот же адрес, который вы указываете службе доставки,
+он, как правило, менее точен и зачастую позволяет определить лишь город или регион.</p>
+
+<p>Если вы считаете свой IP-адрес зоной риска,
+мы рекомендуем использовать VPN для всей системы.
+Настройка VPN для отдельных приложений оставляет уязвимости в общей защите устройства.
+Например, нажатие на ссылку может раскрыть ваш IP-адрес неизвестным сторонам, что представляет собой гораздо больший риск.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1416,7 +1668,7 @@ Delta Chat вместо этого использует реализацию Ope
         
       </h3>
 
-<p>Нет, пока нет.</p>
+<p>Пока нет, но это будет реализовано в <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>На данный момент, Delta Chat не поддерживает Perfect Forward Secrecy (PFS) (Совершенную прямую секретность).
 Это означает, что если ваш приватный ключ дешифрования будет скомпрометирован,
@@ -1427,12 +1679,9 @@ Delta Chat вместо этого использует реализацию Ope
 также может получить все ваши не удалённые сообщения
 и ему даже не нужно расшифровывать какие-либо ранее собранные сообщения.</p>
 
-<p>Мы разработали подход к Forward Secrecy (Прямой секретности), который прошёл 
-первичную проверку некоторыми криптографами и экспертами по реализации 
-но требует более формального описания 
-чтобы убедиться, что он надёжно работает в федеративном обмене сообщениями и при использовании нескольких устройств,
-прежде чем он может быть внедрён в <a href="https://github.com/chatmail/core">ядро chatmail</a>,
-что сделает его доступным во всех <a href="https://chatmail.at/clients">клиентах clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, полное внедрение которого запланировано на 2026 год,
+обеспечит надёжное удаление (прямую секретность) за счёт автоматической ротации ключей.
+Этот подход описан в черновике спецификации <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a>.</p>
     
       <h3 id="pqc">
         
@@ -1442,12 +1691,13 @@ Delta Chat вместо этого использует реализацию Ope
         
       </h3>
 
-<p>Нет, пока нет.</p>
+<p>Пока нет, но эта возможность появится в <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat использует библиотеку OpenPGP на Rust <a href="https://github.com/rpgp/rpgp">rPGP</a>,
-которая поддерживает последний <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">черновик IETF Post-Quantum-Cryptography OpenPGP</a>. 
-Мы планируем добавить поддержку PQC в <a href="https://github.com/chatmail/core">ядро chatmail</a>  после того, как черновик будет окончательно утвержден в IETF
-в сотрудничестве с другими разработчиками OpenPGP.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, полное внедрение которого запланировано на 2026 год,
+обеспечит поддержку постквантового шифрования для защиты от атак с использованием квантовых компьютеров.
+Delta Chat использует Rust-библиотеку OpenPGP <a href="https://github.com/rpgp/rpgp">rPGP</a>
+которая поддерживает актуальный черновик IETF <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP</a>.
+Особенности реализации описаны в черновике спецификации <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a>.</p>
     
       <h3 id="как-можно-вручную-проверить-информацию-о-шифровании">
         
@@ -1522,11 +1772,10 @@ Applied Cryptography в ETH Цюрихе и устранили все выявл
 См. здесь <a href="https://delta.chat/en/2023-05-22-webxdc-security">полную информацию о безопасности сквозного шифрования в Интернете</a>.</p>
   </li>
   <li>
-    <p>В Марте 2023 года, <a href="https://cure53.de">Cure53</a> проанализировал как протокол защиты транспортного уровня
-сетевого соединения Delta Chat, так и воспроизводимую установку почтового сервера,
-<a href="https://delta.chat/ru/serverguide">рекомендуемую на этом сайте</a>.
-Подробнее об аудите можно узнать <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">в нашем блоге</a>
-или прочитать <a href="https://delta.chat/assets/blog/MER-01-report.pdf">полный отчёт здесь</a>.</p>
+    <p>В марте 2023 года компания <a href="https://cure53.de">Cure53</a> провела анализ шифрования транспортного уровня сетевых соединений Delta Chat, а также проверку воспроизводимой конфигурации почтового сервера,
+<a href="https://delta.chat/serverguide">рекомендованной на этом сайте</a>.
+Подробнее об аудите можно узнать <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">в нашем блоге</a>,
+а <a href="https://delta.chat/assets/blog/MER-01-report.pdf">полный отчет доступен по этой ссылке</a>.</p>
   </li>
   <li>
     <p>2020 год, <a href="https://includesecurity.com">Include Security</a> проанализировала Delta
@@ -1626,10 +1875,22 @@ Google Play Store, F-Droid, Huawei App Gallery, iOS и macOS App Store, Microsof
 
 <ul>
   <li>
-    <p>Проект ЕС <a href="https://nextleap.eu">NEXTLEAP</a> финансировал исследование
-и внедрение проверенных групп и настройку протоколов контактов
-в 2017 и 2018 годах, а также помог интегрировать сквозное шифрование
-через <a href="https://autocrypt.org">Autocrypt</a>.</p>
+    <p>В 2023 и 2024 годах мы были приняты в программу Next Generation Internet (NGI)
+за нашу работу над <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+в сотрудничестве с партнерами, работающими над 
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> и 
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
+Все эти проекты частично завершены или будут завершены в начале 2025 года.</p>
+  </li>
+  <li>
+    <p>В 2021 г. мы получили дополнительное финансирование из ЕС для двух Next-Generation-Internet
+целей, а именно для <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - e-mail provider portability directory</a> (~97 тыс. евро) и <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90 тыс. евро). Это привело к улучшению поддержки нескольких профилей, улучшению настройки контактов и групп с помощью QR-кода и многим улучшениям в сетевом взаимодействии на всех платформах.</p>
+  </li>
+  <li>
+    <p>Фонд <a href="https://nlnet.nl/">NLnet Foundation</a> выделил в 2019/2020 году 46 тысяч евро на
+доработку связки Rust/Python и создание экосистемы чат-ботов..</p>
   </li>
   <li>
     <p>Фонд <a href="https://opentechfund.org">Open Technology Fund</a> предоставил нам 
@@ -1642,36 +1903,10 @@ Google Play Store, F-Droid, Huawei App Gallery, iOS и macOS App Store, Microsof
 предоставить новые функции для всех платформ.</p>
   </li>
   <li>
-    <p><a href="https://nlnet.nl/">Фонд NLnet</a> выделил в 2019/2020 году 46 тыс. евро на
-завершение привязки Rust/Python и создание экосистемы чат-ботов.</p>
-  </li>
-  <li>
-    <p>В 2021 г. мы получили дополнительное финансирование из ЕС для двух Next-Generation-Internet
-целей, а именно для <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - e-mail provider portability directory</a> (~97 тыс. евро) и <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90 тыс. евро). Это привело к улучшению поддержки нескольких профилей, улучшению настройки контактов и групп с помощью QR-кода и многим улучшениям в сетевом взаимодействии на всех платформах.</p>
-  </li>
-  <li>
-    <p>С конца 2021 года по март 2023 года мы получили финансирование в размере ($500 тыс.) от
-U.S. Bureau of Democracy, Human Rights and Labor (DRL) для поддержки <em>свободы интернета</em>. 
-Это финансирование поддержало наши долгосрочные цели, сделать Delta Chat более удобным для использования 
-и совместимым с широким спектром электронных почтовых серверов по всему миру, а также более устойчивым
-и безопасным в местах, часто подвергающихся интернет-цензуре и отключениям.</p>
-  </li>
-  <li>
-    <p>2023-2024 мы завершили проект финансируемый OTF 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-что позволило нам внедрить гарантированное шифрование, 
-создать сеть серверов <a href="https://delta.chat/chatmail">chatmail</a> 
-и обеспечить “немедленную регистрацию” во всех приложениях, выпущенных с апреля 2024 года.</p>
-  </li>
-  <li>
-    <p>В 2023 и 2024 годах мы были приняты в программу Next Generation Internet (NGI)
-за нашу работу над <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-в сотрудничестве с партнерами, работающими над 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> и 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-Все эти проекты частично завершены или будут завершены в начале 2025 года.</p>
+    <p>Проект ЕС <a href="https://nextleap.eu">NEXTLEAP</a> финансировал исследование
+и внедрение проверенных групп и настройку протоколов контактов
+в 2017 и 2018 годах, а также помог интегрировать сквозное шифрование
+через <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Иногда мы получаем разовые пожертвования от физических лиц. 

src/main/assets/help/sk/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#podporuje-delta-chat-obrázky-videá-a-iné-prílohy">Podporuje Delta Chat obrázky, videá a iné prílohy?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#kto-vidí-moju-profilovú-fotku">Kto vidí moju profilovú fotku?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,8 +13,9 @@
       <li><a href="#what-does-the-green-dot-mean">What does the green dot mean?</a></li>
       <li><a href="#čo-znamenajú-zaškrtnutia-zobrazené-vedľa-odchádzajúcich-správ">Čo znamenajú zaškrtnutia zobrazené vedľa odchádzajúcich správ?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
-      <li><a href="#delold">What happens if I turn on “Delete old messages from device”?</a></li>
+      <li><a href="#delold">What happens if I turn on “Delete Messages from Device”?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
     </ul>
   </li>
@@ -26,6 +26,22 @@
       <li><a href="#omylom-som-sa-vymazal">Omylom som sa vymazal.</a></li>
       <li><a href="#už-viac-nechcem-dostávať-správy-od-skupiny">Už viac nechcem dostávať správy od skupiny.</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">How does Delta Chat protect metadata in messages?</a></li>
       <li><a href="#device-seizure">How to protect metadata and contacts when a device is seized?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="podporuje-delta-chat-obrázky-videá-a-iné-prílohy">
-        
-        
-          Podporuje Delta Chat obrázky, videá a iné prílohy? <a href="#podporuje-delta-chat-obrázky-videá-a-iné-prílohy" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Yes. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>For performance, images are optimized and sent at a smaller size by default, but you can send it as a “file” to preserve the original.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>V nastaveniach si môžete pridať profilový obrázok. Ak napíšete svojim kontaktom
+<p>V nastaveniach si môžete pridať profilový obrázok. Ak napíšete svojim kontaktom
 alebo si ich pridáte pomocou QR kódu, automaticky to vidia ako váš profilový obrázok.</p>
-  </li>
-  <li>
-    <p>Z dôvodu ochrany osobných údajov nikto nevidí váš profilový obrázok, kým im nenapíšete
+
+<p>Z dôvodu ochrany osobných údajov nikto nevidí váš profilový obrázok, kým im nenapíšete
 správu.</p>
-  </li>
-</ul>
     
       <h3 id="signature">
         
@@ -305,7 +300,8 @@ they will see it when they view your contact details.</p>
   </li>
   <li>
     <p><strong>Archive chats</strong> if you do not want to see them in your chat list any longer.
-Archived chats remain accessible above the chat list or via search.</p>
+They remain accessible above the chat list or via search
+and are marked by <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Archived</b></p>
   </li>
   <li>
     <p>When an archived chat gets a new message, unless muted, it will <strong>pop out of the archive</strong> and back into your chat list.
@@ -340,7 +336,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -377,22 +373,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -421,6 +413,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -457,19 +475,18 @@ the (anyway encrypted) messages may take longer to get deleted from their server
       <h3 id="delold">
         
         
-          What happens if I turn on “Delete old messages from device”? <a href="#delold" class="anchor"></a>
+          What happens if I turn on “Delete Messages from Device”? <a href="#delold" class="anchor"></a>
         
         
       </h3>
 
-<ul>
-  <li>If you want to save storage on your device, you can choose to delete old
-messages automatically.</li>
-  <li>To turn it on, go to “delete old messages from device” in the “Chats &amp; Media”
-settings. You can set a timeframe between “after an hour” and “after a year”;
+<p>If you want to save storage on your device, you can choose to delete old
+messages automatically.</p>
+
+<p>To turn it on, go to <strong>Settings → Chats → Delete Message from Device</strong>.
+You can set a timeframe between “after an hour” and “after a year”;
 this way, <em>all</em> messages will be deleted from your device as soon as they are
-older than that.</li>
-</ul>
+older than that.</p>
     
       <h3 id="remove-account">
         
@@ -517,9 +534,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Vyberte <strong>Nový chat</strong> a potom <strong>Nová skupina</strong> z ponuky v pravom hornom rohu alebo stlačte príslušné tlačidlo v systéme Android/iOS.</li>
-  <li>Na nasledujúcej obrazovke vyberte <strong>členov skupiny</strong> a definujte <strong>názov skupiny</strong>. Môžete si tiež vybrať <strong>avatara skupiny</strong>.</li>
-  <li>Hneď ako napíšete <strong>prvú správu</strong> v skupine, všetci členovia sú informovaní o novej skupine a môžu odpovedať v skupine (pokiaľ nenapíšete správu v skupine, skupina je pre skupinu neviditeľná členovia).</li>
+  <li>
+    <p>Vyberte <strong>Nový chat</strong> a potom <strong>Nová skupina</strong> z ponuky v pravom hornom rohu alebo stlačte príslušné tlačidlo v systéme Android/iOS.</p>
+  </li>
+  <li>
+    <p>Na nasledujúcej obrazovke vyberte <strong>členov skupiny</strong> a definujte <strong>názov skupiny</strong>. Môžete si tiež vybrať <strong>avatara skupiny</strong>.</p>
+  </li>
+  <li>
+    <p>Hneď ako napíšete <strong>prvú správu</strong> v skupine, všetci členovia sú informovaní o novej skupine a môžu odpovedať v skupine (pokiaľ nenapíšete správu v skupine, skupina je pre skupinu neviditeľná členovia).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -530,11 +553,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -562,10 +584,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Keďže už nie ste členom skupiny, nemôžete sa znova pridať. 
-Žiadny problém, jednoducho požiadajte ktoréhokoľvek iného člena skupiny v bežnom chate, aby vás znova pridal.</li>
-</ul>
+<p>Keďže už nie ste členom skupiny, nemôžete sa znova pridať. 
+  Žiadny problém, jednoducho požiadajte ktoréhokoľvek iného člena skupiny v bežnom chate, aby vás znova pridal.</p>
     
       <h3 id="už-viac-nechcem-dostávať-správy-od-skupiny">
         
@@ -576,15 +596,12 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
       </h3>
 
 <ul>
-  <li>
-    <p>Vymažte sa zo zoznamu členov alebo odstráňte celý chat.
- Ak sa chcete neskôr znova pripojiť k skupine, požiadajte iného člena skupiny, aby vás znova pridal.</p>
-  </li>
-  <li>
-    <p>Ako alternatívu môžete tiež “Stlmiť” skupinu - znamená to, že budete dostávať všetky správy a
-môžete stále písať, ale už nebudete upozorňovaní na žiadne nové správy.</p>
-  </li>
+  <li>Vymažte sa zo zoznamu členov alebo odstráňte celý chat.
+ Ak sa chcete neskôr znova pripojiť k skupine, požiadajte iného člena skupiny, aby vás znova pridal.</li>
 </ul>
+
+<p>Ako alternatívu môžete tiež “Stlmiť” skupinu - znamená to, že budete dostávať všetky správy a
+môžete stále písať, ale už nebudete upozorňovaní na žiadne nové správy.</p>
     
       <h3 id="cloning-a-group">
         
@@ -610,6 +627,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -898,7 +1121,7 @@ One device is not needed for the other to work.</p>
     <p>Double-check both devices are in the <strong>same Wi-Fi or network</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -993,10 +1216,10 @@ alebo AppImage pre Linux. Nájdete ich na
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1026,22 +1249,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1155,9 +1382,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Pozrite si <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Štandardy používané v Delta Chate</a>.</li>
-</ul>
+<p>Pozrite si <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Štandardy používané v Delta Chate</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1186,6 +1411,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1370,12 +1599,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1396,6 +1623,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1425,7 +1675,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1436,12 +1686,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1451,12 +1698,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1533,7 +1781,7 @@ See <a href="https://delta.chat/en/2023-05-22-webxdc-security">here for the full
   <li>
     <p>2023 March, <a href="https://cure53.de">Cure53</a> analyzed both the transport encryption of
 Delta Chat’s network connections and a reproducible mail server setup as
-<a href="https://delta.chat/sk/serverguide">recommended on this site</a>.
+<a href="https://delta.chat/serverguide">recommended on this site</a>.
 You can read more about the audit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">on our blog</a>
 or read the <a href="https://delta.chat/assets/blog/MER-01-report.pdf">full report here</a>.</p>
   </li>
@@ -1635,52 +1883,38 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
-  </li>
-  <li>
-    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a 
-first 2018/2019 grant (~$200K) during which we majorly improved the Android app 
-and released a first Desktop app beta version, and which moreover 
-moored our feature developments in UX research in human rights contexts, 
-see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
-The second 2019/2020 grant (~$300K) helped us to 
-release Delta/iOS versions, to convert our core library to Rust, and
-to provide new features for all platforms.</p>
-  </li>
-  <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
   </li>
   <li>
     <p>In 2021 we received further EU funding for two Next-Generation-Internet
 proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
   </li>
   <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
+    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
+completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
   </li>
   <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
+    <p>The <a href="https://opentechfund.org">Open Technology Fund</a> gave us a
+first 2018/2019 grant (~$200K) during which we majorly improved the Android app
+and released a first Desktop app beta version, and which moreover
+moored our feature developments in UX research in human rights contexts,
+see our concluding <a href="https://delta.chat/en/2019-07-19-uxreport">Needfinding and UX report</a>.
+The second 2019/2020 grant (~$300K) helped us to
+release Delta/iOS versions, to convert our core library to Rust, and
+to provide new features for all platforms.</p>
   </li>
   <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
+and implementation of verified groups and setup contact protocols
+in 2017 and 2018 and also helped to integrate end-to-end Encryption
+through <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Sometimes we receive one-time donations from private individuals. 

src/main/assets/help/sq/help.html

@@ -5,7 +5,6 @@
       <li><a href="#howtoe2ee">How can I find people to chat with?</a></li>
       <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
       <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#a-mbulon-delta-chat-i-figura-video-dhe-bashkëngjitje-të-tjera">A mbulon Delta Chat-i figura, video dhe bashkëngjitje të tjera?</a></li>
       <li><a href="#multiple-accounts">What are profiles? How can I switch between them?</a></li>
       <li><a href="#kush-e-sheh-profilin-tim">Kush e sheh profilin tim?</a></li>
       <li><a href="#signature">Can I set a Bio/Status with Delta Chat?</a></li>
@@ -14,6 +13,7 @@
       <li><a href="#çdo-të-thotë-pika-e-gjelbër">Ç’do të thotë pika e gjelbër?</a></li>
       <li><a href="#çduan-të-thonë-shenjat-e-shfaqura-pas-mesazheve-që-dërgohen">Ç’duan të thonë shenjat e shfaqura pas mesazheve që dërgohen?</a></li>
       <li><a href="#edit">Correct typos and delete messages after sending</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">How do disappearing messages work?</a></li>
       <li><a href="#delold">Ç’ndodh, nëse aktivizoj “Fshi prej pajisjes mesazhe të vjetër”?</a></li>
       <li><a href="#remove-account">How can I delete my chat profile?</a></li>
@@ -26,6 +26,22 @@
       <li><a href="#fshiva-veten-padashje">Fshiva veten padashje.</a></li>
       <li><a href="#sdua-ti-marr-më-mesazhet-e-një-grupi">S’dua t’i marr më mesazhet e një grupi.</a></li>
       <li><a href="#cloning-a-group">Cloning a group</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -54,7 +70,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#experimental-features">Experimental Features</a></li>
+      <li><a href="#experiments">Experimental Features</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -76,6 +92,7 @@
       <li><a href="#tls">Are messages marked with the mail icon exposed on the Internet?</a></li>
       <li><a href="#message-metadata">Si i mbron Delta Chat-i tejtëdhënat në mesazhe?</a></li>
       <li><a href="#device-seizure">Si të mbrohen tejtëdhënat dhe kontaktet, kur shtien në dorë një pajisje?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Does Delta Chat support “Sealed Sender”?</a></li>
       <li><a href="#pfs">Does Delta Chat support Perfect Forward Secrecy?</a></li>
       <li><a href="#pqc">Does Delta Chat support Post-Quantum-Cryptography?</a></li>
@@ -185,7 +202,8 @@ If you add each other to <a href="#groups">groups</a>, end-to-end encryption wil
 <p>As being a private messenger,
 only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Your friends may share your contact with other friends,
+this appears as <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Request</b></p>
 
 <ul>
   <li>
@@ -215,24 +233,6 @@ You can also add a little introduction message.</p>
 <p>The second contact will receive a <strong>card</strong> then
 and can tap it to start chatting with the first contact.</p>
     
-      <h3 id="a-mbulon-delta-chat-i-figura-video-dhe-bashkëngjitje-të-tjera">
-        
-        
-          A mbulon Delta Chat-i figura, video dhe bashkëngjitje të tjera? <a href="#a-mbulon-delta-chat-i-figura-video-dhe-bashkëngjitje-të-tjera" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Po Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>Si parazgjedhje, për funksionim më të mirë, figurat optimizohen dhe dërgohen në madhësi më të vogël, por mund ta dërgoni si një “kartelë”, që të ruhet origjinali.</p>
-  </li>
-</ul>
-    
       <h3 id="multiple-accounts">
         
         
@@ -262,16 +262,11 @@ or to <strong>Switch Profiles</strong>.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Mund të shtoni një foto profili te rregullimet tuaja. Nëse u shkruani kontakteve
-tuaja ose i shtoni përmes kodi QR, e shohin automatikisht si foton e profilit tuaj.</p>
-  </li>
-  <li>
-    <p>Për arsye privatësie, askush s’e sheh foton tuaj të profilit, deri sa
- t’u shkruani një mesazh.</p>
-  </li>
-</ul>
+<p>Mund të shtoni një foto profili te rregullimet tuaja. Nëse u shkruani kontakteve
+  tuaja ose i shtoni përmes kodi QR, e shohin automatikisht si foton e profilit tuaj.</p>
+
+<p>Për arsye privatësie, askush s’e sheh foton tuaj të profilit, deri sa
+   t’u shkruani një mesazh.</p>
     
       <h3 id="signature">
         
@@ -304,8 +299,7 @@ they will see it when they view your contact details.</p>
     <p><strong>Heshtoni fjalosje</strong>, nëse s’doni të merrni njoftime mbi to. Fjalosjet e heshtuara qëndrojnë në vend dhe mundeni edhe të fiksoni një fjalosje të heshtuar.</p>
   </li>
   <li>
-    <p><strong>Arkivoni fjalosje</strong>, nëse s’doni t’i shihni më në listën tuaj të fjalosjeve.
-Fjalosjet e arkivuara mbesin të përdorshme mbi listën e fjalosjeve, ose përmes kërkimit.</p>
+    <p><strong>Arkivoni fjalosje</strong>, nëse s’doni t’i shihni më në listën tuaj të fjalosjeve. Fjalosjet e arkivuara mbesin të përdorshme mbi listën e fjalosjeve, ose përmes kërkimit.</p>
   </li>
   <li>
     <p>Kur te një fjalosje e arkivuar vjen një mesazh i ri, do të <strong>hapet jashtë arkivit</strong> dhe kalojë te lista juaj e fjalosjeve, veç në mos qoftë e heshtuar.
@@ -341,7 +335,7 @@ By tapping <img style="vertical-align:middle; width:1.2em; margin:1px" src="../g
 you can go back to the original message in the original chat</p>
   </li>
   <li>
-    <p>Finally, you can also use “Save Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
+    <p>Finally, you can also use “Saved Messages” to take <strong>personal notes</strong> - open the chat, type something, add a photo or a voice message etc.</p>
   </li>
   <li>
     <p>As “Saved Message” are synced, they can become very handy for transferring data between devices</p>
@@ -378,22 +372,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -422,6 +412,32 @@ Notifications are not sent and there is no time limit.</p>
 <p>Note, that the original message may still be received by chat members
 who could have already replied, forwarded, saved, screenshotted or otherwise copied the message.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -463,14 +479,13 @@ the (anyway encrypted) messages may take longer to get deleted from their server
         
       </h3>
 
-<ul>
-  <li>Nëse doni të kurseni hapësirë në pajisjen tuaj, mund të zgjidhni të fshihen
-automatikisht mesazhe të vjetër.</li>
-  <li>Për ta aktivizuar, kaloni te “fshi prej pajisjeje mesazhe të vjetër”, te rregullimet
+<p>Nëse doni të kurseni hapësirë në pajisjen tuaj, mund të zgjidhni të fshihen
+automatikisht mesazhe të vjetër.</p>
+
+<p>Për ta aktivizuar, kaloni te “fshi prej pajisjeje mesazhe të vjetër”, te rregullimet
 “Fjalosje &amp; Media”. Mund të caktoni një periudhë nga “pas një ore” e deri
 “pas një viti”; në këtë mënyrë, <em>krejt</em> mesazhet do të fshihen nga pajisja juaj
-sapo të jenë më të vjetër se aq.</li>
-</ul>
+sapo të jenë më të vjetër se aq.</p>
     
       <h3 id="remove-account">
         
@@ -518,9 +533,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Prej menusë në cepin e sipërm djathtas, përzgjidhni <strong>Fjalosje e re</strong> dhe mandej <strong>Grup i ri</strong>, ose shtypni butonin përgjegjës në Android/iOS.</li>
-  <li>Te skena vijuese, përzgjidhni <strong>anëtarë grupi</strong> dhe përcaktoni një <strong>emër grupi</strong>. Mund të përzgjidhni edhe një <strong>avatar grupi</strong>.</li>
-  <li>Sapo të shkruani <strong>mesazhin e parë</strong> te grupi, krejt anëtarët marrin vesh për grupin e ri dhe mund të përgjigjen në të (për sa kohë që te grupi s’shkruani një mesazh i cili është i padukshëm për anëtarët).</li>
+  <li>
+    <p>Prej menusë në cepin e sipërm djathtas, përzgjidhni <strong>Fjalosje e re</strong> dhe mandej <strong>Grup i ri</strong>, ose shtypni butonin përgjegjës në Android/iOS.</p>
+  </li>
+  <li>
+    <p>Te skena vijuese, përzgjidhni <strong>anëtarë grupi</strong> dhe përcaktoni një <strong>emër grupi</strong>. Mund të përzgjidhni edhe një <strong>avatar grupi</strong>.</p>
+  </li>
+  <li>
+    <p>Sapo të shkruani <strong>mesazhin e parë</strong> te grupi, krejt anëtarët marrin vesh për grupin e ri dhe mund të përgjigjen në të (për sa kohë që te grupi s’shkruani një mesazh i cili është i padukshëm për anëtarët).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -531,11 +552,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
-<ul>
-  <li>
-    <p>All group members have the <strong>same rights</strong>.
+<p>All group members have the <strong>same rights</strong>.
 For this reason, everyone can delete any member or add new ones.</p>
-  </li>
+
+<ul>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -563,10 +583,8 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Ngaqë s’jeni më anëtar i grupit, s’mund të shtoni veten sërish. 
-Megjithatë, s’ka problem, thjesht kërkojini një anëtari tjetër të grupit në një fjalosje të zakonshme t’ju shtojë sërish.</li>
-</ul>
+<p>Ngaqë s’jeni më anëtar i grupit, s’mund të shtoni veten sërish. 
+  Megjithatë, s’ka problem, thjesht kërkojini një anëtari tjetër të grupit në një fjalosje të zakonshme t’ju shtojë sërish.</p>
     
       <h3 id="sdua-ti-marr-më-mesazhet-e-një-grupi">
         
@@ -577,16 +595,13 @@ Megjithatë, s’ka problem, thjesht kërkojini një anëtari tjetër të grupit
       </h3>
 
 <ul>
-  <li>
-    <p>Ose fshini veten si anëtar i listës, ose fshini krejt bisedën. 
-Nëse më vonë doni të ribëheni pjesë e grupit, kërkojini një anëtari tjetër të grupit t’ju shtojë sërish.</p>
-  </li>
-  <li>
-    <p>Ndryshe, mundeni edhe ta “Heshtoni” një grup - duke bërë këtë, do të merrni
+  <li>Ose fshini veten si anëtar i listës, ose fshini krejt bisedën. 
+Nëse më vonë doni të ribëheni pjesë e grupit, kërkojini një anëtari tjetër të grupit t’ju shtojë sërish.</li>
+</ul>
+
+<p>Ndryshe, mundeni edhe ta “Heshtoni” një grup - duke bërë këtë, do të merrni
 krejt mesazhet dhe prapë mund të shkruani, por nuk njoftoheni më, 
 për çfarëdo mesazhesh të rinj.</p>
-  </li>
-</ul>
     
       <h3 id="cloning-a-group">
         
@@ -612,6 +627,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>The new group is <strong>fully independent</strong> from the original,
 which continues to work as before.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -900,7 +1121,7 @@ Njëra pajisja s’ka nevojë për tjetrën që të funksionojë.</p>
     <p>Kontrolloni sërish që të dyja pajisjet të gjenden në <strong>të njëjtin rrjet Wi-Fi ose klasik</strong></p>
   </li>
   <li>
-    <p>On <strong>Windows</strong>, go to <strong>Control Panel / Network and Internet</strong>
+    <p>On <strong>Windows</strong>, go to “Control Panel / Network and Internet”
 and make sure, <strong>Private Network</strong> is selected as “Network profile type”
 (after transfer, you can change back to the original value)</p>
   </li>
@@ -997,10 +1218,10 @@ Windows Desktop, ose AppImage për Linux. Mund t’i gjeni te
         
       </h2>
     
-      <h3 id="experimental-features">
+      <h3 id="experiments">
         
         
-          Experimental Features <a href="#experimental-features" class="anchor"></a>
+          Experimental Features <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -1030,22 +1251,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1159,9 +1384,7 @@ weekly statistics will be automatically sent to a bot.</p>
         
       </h3>
 
-<ul>
-  <li>Shihni <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standarde të përdorur në Delta Chat</a>.</li>
-</ul>
+<p>Shihni <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Standarde të përdorur në Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1190,6 +1413,10 @@ to exchange encryption setup information through QR-code scanning or “invite l
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> is used for automatically
 establishing end-to-end encryption between contacts and all members of a group chat.</p>
+  </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
   </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Sharing a contact to a
@@ -1374,12 +1601,10 @@ Instead, all group metadata is end-to-end encrypted and stored on end-user devic
 <p>Servers can therefore only see:</p>
 
 <ul>
-  <li>the sender and receiver addresses</li>
-  <li>and the message size.</li>
+  <li>Sender and receiver addresses, randomly generated by default</li>
+  <li>Message size</li>
 </ul>
 
-<p>By default, the addresses are randomly generated.</p>
-
 <p>All other message, contact and group metadata resides in the end-to-end encrypted part of messages.</p>
     
       <h3 id="device-seizure">
@@ -1400,6 +1625,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1429,7 +1677,7 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat today doesn’t support Perfect Forward Secrecy (PFS).
 This means that if your private decryption key is leaked,
@@ -1440,12 +1688,9 @@ Otherwise, someone obtaining your decryption keys
 is typically also able to get all your non-deleted messages
 and doesn’t even need to decrypt any previously collected messages.</p>
 
-<p>We designed a Forward Secrecy approach that withstood 
-initial examination from some cryptographers and implementation experts 
-but is pending a more formal write up 
-to ascertain it reliably works in federated messaging and with multi-device usage,
-before it could be implemented in <a href="https://github.com/chatmail/core">chatmail core</a>,
-which would make it available in all <a href="https://chatmail.at/clients">chatmail clients</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1455,12 +1700,13 @@ which would make it available in all <a href="https://chatmail.at/clients">chatm
         
       </h3>
 
-<p>No, not yet.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
-which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. 
-We aim to add PQC support in <a href="https://github.com/chatmail/core">chatmail core</a>  after the draft is finalized at the IETF
-in collaboration with other OpenPGP implementers.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="how-can-i-manually-check-encryption-information">
         
@@ -1538,7 +1784,7 @@ Shihni <a href="https://delta.chat/en/2023-05-22-webxdc-security">këtu, për sh
   <li>
     <p>Në fillim të 2023-it, <a href="https://cure53.de">Cure53</a> analizoi qoftë fshehtëzimin
 e transporteve për lidhje rrjeti të Delta Chat-it, qoftë një formësim të riprodhueshëm
-shërbyesi poste si <a href="https://delta.chat/sq/serverguide">të rekomanduarin në këtë sajt</a>.
+shërbyesi poste si <a href="https://delta.chat/serverguide">të rekomanduarin në këtë sajt</a>.
 Mund të lexoni më tepër rreth auditimit <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">në blogun tonë</a>,
 ose të lexoni <a href="https://delta.chat/assets/blog/MER-01-report.pdf">raportin e plotë këtu</a>.</p>
   </li>
@@ -1639,10 +1885,25 @@ ordered chronologically:</p>
 
 <ul>
   <li>
-    <p>The <a href="https://nextleap.eu">NEXTLEAP</a> EU project funded the research
-and implementation of verified groups and setup contact protocols
-in 2017 and 2018 and also helped to integrate end-to-end Encryption
-through <a href="https://autocrypt.org">Autocrypt</a>.</p>
+    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
+program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
+along with collaboration partners working on
+<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>,
+<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>,
+<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and
+<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>.
+All of these projects are partially completed or to be completed in early 2025.</p>
+  </li>
+  <li>
+    <p>Më 2021-n morëm financime të mëtejshme nga BE për dy propozime që shtrihen në
+“Internetin e Brezit Tjetër”, konkretisht për <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - e-mail provider portability directory</a> (~97K euro) dhe <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K euro) që sollën mbulim më të mirë për përdorues me shumë
+llogari, përmirësim të gjërave për kontakte me kod QR dhe grupe, si dhe mjaft
+përmirësime në punën në rrjet për krejt platformat.</p>
+  </li>
+  <li>
+    <p><a href="https://nlnet.nl/">Fondacioni NLnet</a> dhuroi 46K euro gjatë 2019/2020 për
+plotësimin e <em>Rust/Python bindings</em> dhe për t’i dhënë udhë një ekosistemi
+Chat-bot.</p>
   </li>
   <li>
     <p><a href="https://opentechfund.org">Open Technology Fund</a> na dha grantin e parë 
@@ -1655,36 +1916,10 @@ versione Delta/iOS, për të shndërruar bibliotekën tonë bazë në Rust, si d
 për të sjellë veçori të reja për krejt platformat.</p>
   </li>
   <li>
-    <p>The <a href="https://nlnet.nl/">NLnet foundation</a> granted in 2019/2020 EUR 46K for
-completing Rust/Python bindings and instigating a Chat-bot eco-system.</p>
-  </li>
-  <li>
-    <p>In 2021 we received further EU funding for two Next-Generation-Internet
-proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
-  </li>
-  <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
-  </li>
-  <li>
-    <p>2023-2024 we successfully completed the OTF-funded 
-<a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail project</a>, 
-allowing us to introduce guaranteed encryption, 
-creating a <a href="https://delta.chat/chatmail">chatmail server network</a> 
-and providing “instant onboarding” in all apps released from April 2024 on.</p>
-  </li>
-  <li>
-    <p>In 2023 and 2024 we got accepted in the Next Generation Internet (NGI)
-program for our work in <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>,
-along with collaboration partners working on 
-<a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, 
-<a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, 
-<a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> and 
-<a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. 
-All of these projects are partially completed or to be completed in early 2025.</p>
+    <p>Projekti <a href="https://nextleap.eu">NEXTLEAP</a> i BE-së financoi kërkimin
+për dhe sendërtimin e grupeve të verifikuara dhe protokolleve të
+ujdisjes së kontakteve më 2017-n dhe 2018-n dhe ndihmoi gjithashtu
+të integrohet Fshehtëzim Skaj-më-Skaj përmes <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Ndonjëherë marrim dhurime unike nga individë privatë. 

src/main/assets/help/uk/help.html

@@ -3,9 +3,8 @@
   <li><a href="#що-таке-delta-chat">Що таке Delta Chat?</a>
     <ul>
       <li><a href="#howtoe2ee">Як мені знайти людей для спілкування?</a></li>
-      <li><a href="#why-is-a-chat-marked-as-request">Why is a chat marked as “Request”?</a></li>
-      <li><a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other">How can I put two of my friends in contact with each other?</a></li>
-      <li><a href="#чи-підтримує-delta-chat-вкладення-у-вигляді-фото-відео-тощо">Чи підтримує Delta Chat вкладення у вигляді фото, відео тощо?</a></li>
+      <li><a href="#чому-чат-позначений-як-запит">Чому чат позначений як «Запит»?</a></li>
+      <li><a href="#як-я-можу-познайомити-двох-своїх-друзів-один-з-одним">Як я можу познайомити двох своїх друзів один з одним?</a></li>
       <li><a href="#multiple-accounts">Що таке профілі? Як я можу перемикатися між ними?</a></li>
       <li><a href="#хто-бачить-моє-зображення-профілю">Хто бачить моє зображення профілю?</a></li>
       <li><a href="#signature">Чи можу я встановити біографію/статус у Delta Chat?</a></li>
@@ -14,6 +13,7 @@
       <li><a href="#що-означає-зелена-точка">Що означає зелена точка?</a></li>
       <li><a href="#що-означають-галочки-біля-вихідних-повідомлень">Що означають галочки біля вихідних повідомлень?</a></li>
       <li><a href="#edit">Виправлення помилок та видалення повідомлень після надсилання</a></li>
+      <li><a href="#mediaquality">How is media quality handled?</a></li>
       <li><a href="#ephemeralmsgs">Як працюють повідомлення, що зникають?</a></li>
       <li><a href="#delold">Що станеться, якщо я ввімкну «Видаляти старі повідомлення з пристрою»?</a></li>
     </ul>
@@ -25,6 +25,22 @@
       <li><a href="#я-випадково-себе-видалив">Я випадково себе видалив</a></li>
       <li><a href="#я-більше-не-хочу-отримувати-повідомлення-групи">Я більше не хочу отримувати повідомлення групи.</a></li>
       <li><a href="#клонування-групи">Клонування групи</a></li>
+      <li><a href="#how-many-members-can-participate-in-a-single-group">How many members can participate in a single group?</a></li>
+    </ul>
+  </li>
+  <li><a href="#channels">Channels</a>
+    <ul>
+      <li><a href="#subscribe-to-a-channel">Subscribe to a channel</a></li>
+      <li><a href="#create-a-channel">Create a channel</a></li>
+      <li><a href="#how-many-subscribers-can-a-channel-have">How many subscribers can a channel have?</a></li>
+    </ul>
+  </li>
+  <li><a href="#calls">Calls</a>
+    <ul>
+      <li><a href="#place-a-call">Place a call</a></li>
+      <li><a href="#accept-or-reject-a-call">Accept or reject a call</a></li>
+      <li><a href="#during-a-call">During a call</a></li>
+      <li><a href="#missed-calls-and-notifications">Missed calls and notifications</a></li>
     </ul>
   </li>
   <li><a href="#webxdc">In-chat apps</a>
@@ -53,7 +69,7 @@
   </li>
   <li><a href="#advanced">Advanced</a>
     <ul>
-      <li><a href="#експериментальні-функції">Експериментальні функції</a></li>
+      <li><a href="#experiments">Експериментальні функції</a></li>
       <li><a href="#relays">What are Relays?</a></li>
       <li><a href="#can-i-use-a-classic-email-address-with-delta-chat">Can I use a classic email address with Delta Chat?</a></li>
       <li><a href="#classic-email">How can I configure a chat profile with a classic email address as relay?</a></li>
@@ -75,6 +91,7 @@
       <li><a href="#чи-повідомлення-позначені-значком-пошти-доступні-в-інтернетіtls">Чи повідомлення, позначені значком пошти, доступні в Інтернеті?{#tls}</a></li>
       <li><a href="#message-metadata">Як Delta Chat захищає метадані у повідомленнях?</a></li>
       <li><a href="#device-seizure">Як захистити метадані та контакти якщо пристрій вилучено?</a></li>
+      <li><a href="#who-sees-my-ip-address">Who sees my IP Address?</a></li>
       <li><a href="#sealedsender">Чи підтримує Delta Chat функцію “Запечатаний відправник”?</a></li>
       <li><a href="#pfs">Чи підтримує Delta Chat цілковиту пряму секретність (Perfect Forward Secrecy)?</a></li>
       <li><a href="#pqc">Чи підтримує Delta Chat пост-квантову криптографію?</a></li>
@@ -138,17 +155,10 @@
 
 <ul>
   <li>
-    <p>If you are <strong>face to face</strong> with your friend or family,
-tap the <strong>QR Code</strong> icon <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" />
-on the main screen.<br />
-Ask your chat partner to <strong>scan</strong> the QR image
-with their Delta Chat app.</p>
+    <p>Якщо ви перебуваєте <strong>віч-на-віч</strong> зі своїм другом або родиною, торкніться піктограми <strong>QR-код</strong> на головному екрані <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> на головному екрані. Попросіть вашого партнера по чату <strong>сканувати</strong> QR-зображення за допомогою їхнього застосунку Delta Chat.</p>
   </li>
   <li>
-    <p>For a <strong>remote</strong> contact setup,
-from the same screen,
-click “Copy” or “Share” and send the <strong>invite link</strong>
-through another private chat.</p>
+    <p>Для <strong>віддаленого</strong> налаштування контакту, на тому ж самому екрані, натисніть “Копіювати” або “Поділитися” і відправте <strong>запрошувальне посилання</strong> через інший приватний чат.</p>
   </li>
 </ul>
 
@@ -156,8 +166,7 @@ through another private chat.</p>
 
 <ul>
   <li>
-    <p>If both sides are online, they will soon see a chat
-and can start messaging securely.</p>
+    <p>Якщо обидві сторони перебувають у мережі, незабаром з’явиться вікно чату, і вони зможуть безпечно обмінюватися повідомленнями.</p>
   </li>
   <li>
     <p>If one side is offline or in bad network,
@@ -169,18 +178,17 @@ the ability to chat is delayed until connectivity is restored.</p>
 Тепер Ви автоматично використовуватимете <a href="#e2ee">наскрізне шифрування</a> з цим контактом.
 Якщо ви додасте один одного у <a href="#groups">групи</a>, наскрізне шифрування буде встановлено між усіма учасниками.</p>
     
-      <h3 id="why-is-a-chat-marked-as-request">
+      <h3 id="чому-чат-позначений-як-запит">
         
         
-          Why is a chat marked as “Request”? <a href="#why-is-a-chat-marked-as-request" class="anchor"></a>
+          Чому чат позначений як «Запит»? <a href="#чому-чат-позначений-як-запит" class="anchor"></a>
         
         
       </h3>
 
-<p>As being a private messenger,
-only friends and family you <a href="#howtoe2ee">share your QR code or invite link with</a> can write to you.</p>
+<p>Оскільки це приватний месенджер, лише друзі та родичі, яким ви <a href="#howtoe2ee">надіслали свій QR-код або посилання-запрошення</a>, можуть вам писати.</p>
 
-<p>Your friends may share your contact with other friends, this appears as a <strong>request</strong>.</p>
+<p>Ваші друзі можуть поділитися вашими контактними даними з іншими друзями, це відображається як <b style="border: 1px solid currentColor; padding: 0 3px; font-size:90%">Запит</b></p>
 
 <ul>
   <li>
@@ -194,37 +202,17 @@ only friends and family you <a href="#howtoe2ee">share your QR code or invite li
   </li>
 </ul>
     
-      <h3 id="how-can-i-put-two-of-my-friends-in-contact-with-each-other">
+      <h3 id="як-я-можу-познайомити-двох-своїх-друзів-один-з-одним">
         
         
-          How can I put two of my friends in contact with each other? <a href="#how-can-i-put-two-of-my-friends-in-contact-with-each-other" class="anchor"></a>
+          Як я можу познайомити двох своїх друзів один з одним? <a href="#як-я-можу-познайомити-двох-своїх-друзів-один-з-одним" class="anchor"></a>
         
         
       </h3>
 
-<p>Attach the first contact to the chat of the second using <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment Button → Contact</strong>.
-You can also add a little introduction message.</p>
+<p>Додайте перший контакт до чату другого, скориставшись функцією <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Кнопка «Додати» → Контакт</strong>. Ви також можете додати коротке повідомлення-представлення.</p>
 
-<p>The second contact will receive a <strong>card</strong> then
-and can tap it to start chatting with the first contact.</p>
-    
-      <h3 id="чи-підтримує-delta-chat-вкладення-у-вигляді-фото-відео-тощо">
-        
-        
-          Чи підтримує Delta Chat вкладення у вигляді фото, відео тощо? <a href="#чи-підтримує-delta-chat-вкладення-у-вигляді-фото-відео-тощо" class="anchor"></a>
-        
-        
-      </h3>
-
-<ul>
-  <li>
-    <p>Так. Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attachment-</strong>
-or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons</p>
-  </li>
-  <li>
-    <p>З міркувань продуктивності, зображення оптимізовані та надсилаються в меншому розмірі за замовчуванням, але ви можете надіслати їх як «файл», щоб зберегти оригінал.</p>
-  </li>
-</ul>
+<p>Тоді другий контакт отримає <strong>картку</strong> і зможе натиснути на неї, щоб почати чат із першим контактом.</p>
     
       <h3 id="multiple-accounts">
         
@@ -234,9 +222,7 @@ or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png"
         
       </h3>
 
-<p>A profile is <strong>a name, a picture</strong> and some additional information for encrypting messages.
-A profile lives on your device(s) only
-and uses the server only to relay messages.</p>
+<p>Профіль — це <strong>ім’я, зображення</strong> та деяка додаткова інформація для шифрування повідомлень. Профіль зберігається виключно на вашому пристрої (пристроях) і використовує сервер лише для передачі повідомлень.</p>
 
 <p>Під час першого встановлення Delta Chat створюється перший профіль.</p>
 
@@ -254,14 +240,9 @@ and uses the server only to relay messages.</p>
         
       </h3>
 
-<ul>
-  <li>
-    <p>Ви можете додати зображення профілю в ваших налаштуваннях. Якщо ви пишете комусь із ваших контактів чи додаєте їх через QR код, вони автоматично побачать ваше зображення профілю.</p>
-  </li>
-  <li>
-    <p>Із міркувань приватності, ніхто не бачить ваше зображення профілю доки ви їм не напишете.</p>
-  </li>
-</ul>
+<p>Ви можете додати зображення профілю в ваших налаштуваннях. Якщо ви пишете комусь із ваших контактів чи додаєте їх через QR код, вони автоматично побачать ваше зображення профілю.</p>
+
+<p>Із міркувань приватності, ніхто не бачить ваше зображення профілю доки ви їм не напишете.</p>
     
       <h3 id="signature">
         
@@ -271,10 +252,7 @@ and uses the server only to relay messages.</p>
         
       </h3>
 
-<p>Yes,
-you can do so under <strong>Settings → Profile → Bio</strong>.
-Once you sent a message to a contact,
-they will see it when they view your contact details.</p>
+<p>Так, ви можете це зробити в розділі <strong>Налаштування → Профіль → Опис</strong>. Після того як ви надішлете повідомлення контакту, він побачить його, переглянувши ваші контактні дані.</p>
     
       <h3 id="що-значить-закріплення-приглушення-архівування">
         
@@ -294,8 +272,7 @@ they will see it when they view your contact details.</p>
     <p><strong>Приглушіть чати</strong> якщо ви не хочете отримувати сповіщення для них. Приглушені чати залишаються на місці і ви також можете закріпити приглушений чат.</p>
   </li>
   <li>
-    <p><strong>Архівуйте чати</strong>, якщо ви більше не хочете бачити їх у своєму списку чатів. 
-Заархівовані чати залишаються доступними над списком чатів або через пошук.</p>
+    <p><strong>Архівуйте чати</strong>, якщо ви більше не хочете бачити їх у своєму списку чатів. Заархівовані чати залишаються доступними над списком чатів або через пошук.</p>
   </li>
   <li>
     <p>Коли архівний чат отримує нове повідомлення, якщо не приглушений, він <strong>вискочить з архіву</strong> і повернеться у ваш список чатів.
@@ -343,10 +320,7 @@ they will see it when they view your contact details.</p>
         
       </h3>
 
-<p>You can sometimes see a <strong>green dot</strong> <img style="vertical-align:middle; width:1.2em; margin:1px" src="../green-dot.png" alt="" />
-next to the avatar of a contact.
-It means they were <strong>recently seen by you</strong> in the last 10 minutes,
-e.g. because they messaged you or sent a read receipt.</p>
+<p>Іноді біля аватара контакту можна побачити <strong>зелену крапку</strong> <img style="vertical-align:middle; width:1.2em; margin:1px" src="../green-dot.png" alt="" />. Це означає, що ви <strong>нещодавно бачили його</strong> протягом останніх 10 хвилин, наприклад, тому що він надіслав вам повідомлення або підтвердження прочитання.</p>
 
 <p>So this is not a real time online status
 and others will as well not always see that you are “online”.</p>
@@ -362,22 +336,18 @@ and others will as well not always see that you are “online”.</p>
 <ul>
   <li>
     <p><strong>One tick</strong> <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick1.png" alt="" />
-means that the message was sent successfully to your provider.</p>
+means that the message was sent successfully to the <a href="#relays">relay</a>.</p>
   </li>
   <li>
     <p><strong>Two ticks</strong>  <img style="vertical-align:middle; width:1.5em; margin:1px" src="../tick2.png" alt="" />
-mean that at least one recipient’s device
-reported back to having received the message.</p>
-  </li>
-  <li>
-    <p>Recipients may have disabled read-receipts,
-so even if you see only one tick, the message may have been read.</p>
-  </li>
-  <li>
-    <p>The other way round, two ticks do not automatically mean
-that a human has read or understood the message ;)</p>
+indicate your contact has read the message.</p>
   </li>
 </ul>
+
+<p>In <a href="#groups">groups</a> the second tick means that at least one member has reported back having read the message.</p>
+
+<p>You will only get the second tick if both you and one of the recipients who read the message
+has <strong>Settings → Chats → Read Receipts</strong> enabled.</p>
     
       <h3 id="edit">
         
@@ -400,6 +370,32 @@ that a human has read or understood the message ;)</p>
 
 <p>Зауважте, що початкове повідомлення все ще може бути отримане учасниками чату які могли вже відповісти, переслати, зберегти, зробити знімок екрану або іншим чином скопіювати повідомлення.</p>
     
+      <h3 id="mediaquality">
+        
+        
+          How is media quality handled? <a href="#mediaquality" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Images, videos, files, voice messages etc. can be sent using the <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach-</strong>
+or <img style="vertical-align:middle; width:0.8em; margin:1px" src="../mic.png" alt="Microphone" /> <strong>Voice Message</strong> buttons.</p>
+
+<ul>
+  <li>
+    <p>By default, compression ensures <strong>fast, efficient delivery</strong> that respects everyone’s data limits and storage.
+This is ideal for everyday communication.</p>
+  </li>
+  <li>
+    <p>In regions with worse connectivity,
+you can choose higher compression at <strong>Settings → Chats → Outgoing Media Quality</strong>.</p>
+  </li>
+  <li>
+    <p>If you specifically need to send media in its <strong>original quality</strong>, use <img style="vertical-align:middle; width:1.0em; margin:1px" src="../paperclip.png" alt="Paperclip" /> <strong>Attach → File</strong> in the chat.
+Please use this method sparingly, as sending original files will significantly increase data usage for you and all recipients in the chat.</p>
+  </li>
+</ul>
+    
       <h3 id="ephemeralmsgs">
         
         
@@ -438,11 +434,10 @@ the (anyway encrypted) messages may take longer to get deleted from their server
         
       </h3>
 
-<ul>
-  <li>Якщо ви хочете заощадити пам’ять на своєму пристрої, ви можете видалити старе повідомлення автоматично.</li>
-  <li>Щоб увімкнути його, перейдіть до «видалити старі повідомлення з пристрою» в налаштуваннях «Чатів та медіа» . Ви можете встановити часові рамки від «через годину» до «через рік»; 
-Таким чином, <em>усі</em> повідомлення будуть видалені з вашого пристрою, як тільки вони будуть старішими за це.</li>
-</ul>
+<p>Якщо ви хочете заощадити пам’ять на своєму пристрої, ви можете видалити старе повідомлення автоматично.</p>
+
+<p>Щоб увімкнути його, перейдіть до «видалити старі повідомлення з пристрою» в налаштуваннях «Чатів та медіа» . Ви можете встановити часові рамки від «через годину» до «через рік»; 
+Таким чином, <em>усі</em> повідомлення будуть видалені з вашого пристрою, як тільки вони будуть старішими за це.</p>
 
 <p>Як я можу видалити свій профіль у Delta Chat? {#remove-account}</p>
 
@@ -484,9 +479,15 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
       </h3>
 
 <ul>
-  <li>Оберіть <strong>Новий чат</strong>, потім <strong>Нова групи</strong> у меню в верхньому правому кутку або натисніть відповідну кнопку у Android/iOS.</li>
-  <li>На наступному екрані виберіть <strong>учасники групи</strong> та встановіть <strong>назву групи</strong>. Ви також можете обрати <strong>аватар групи</strong>.</li>
-  <li>Як тільки ви напишете <strong>перше повідомлення</strong> у групу, усі учасники будуть проінформовані про нову групу і зможуть відповісти у нову групу (доки ви не напишете повідомлення у групі, група залишатиметься невидимою для учасників).</li>
+  <li>
+    <p>Оберіть <strong>Новий чат</strong>, потім <strong>Нова групи</strong> у меню в верхньому правому кутку або натисніть відповідну кнопку у Android/iOS.</p>
+  </li>
+  <li>
+    <p>На наступному екрані виберіть <strong>учасники групи</strong> та встановіть <strong>назву групи</strong>. Ви також можете обрати <strong>аватар групи</strong>.</p>
+  </li>
+  <li>
+    <p>Як тільки ви напишете <strong>перше повідомлення</strong> у групу, усі учасники будуть проінформовані про нову групу і зможуть відповісти у нову групу (доки ви не напишете повідомлення у групі, група залишатиметься невидимою для учасників).</p>
+  </li>
 </ul>
     
       <h3 id="addmembers">
@@ -497,11 +498,10 @@ and <a href="#edit">delete their own messages</a> from all member’s devices.</
         
       </h3>
 
+<p>All group members have the <strong>same rights</strong>.
+For this reason, everyone can delete any member or add new ones.</p>
+
 <ul>
-  <li>
-    <p>Усі учасники групи мають <strong>однакові права</strong>.
-Тому кожен може видалити будь-якого учасника або додати нових.</p>
-  </li>
   <li>
     <p>To <strong>add or delete members</strong>, tap the group name in the chat and select the member to add or remove.</p>
   </li>
@@ -529,9 +529,7 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
         
       </h3>
 
-<ul>
-  <li>Оскільки ви більше не учасник групи, ви не зможете додати себе знову. Однак, це не проблема, просто попросіть будь-якого іншого учасника групи в звичайному чаті додати вас знову.</li>
-</ul>
+<p>Оскільки ви більше не учасник групи, ви не зможете додати себе знову. Однак, це не проблема, просто попросіть будь-якого іншого учасника групи в звичайному чаті додати вас знову.</p>
     
       <h3 id="я-більше-не-хочу-отримувати-повідомлення-групи">
         
@@ -542,13 +540,10 @@ However, since groups are <a href="#groups">meant for trusted people</a>, avoid
       </h3>
 
 <ul>
-  <li>
-    <p>Або видаліть себе із списку учасників групи, або видаліть весь чат. Якщо ви хочете повернутись до чату пізніше, попросіть іншого учасника групи додати вас знову.</p>
-  </li>
-  <li>
-    <p>Ви також можете “Заглушити” групу - це означає, що ви будете отримувати усі повідомлення та можете писати у групу, але ви більше не будете отримувати сповіщення про нові повідомлення.</p>
-  </li>
+  <li>Або видаліть себе із списку учасників групи, або видаліть весь чат. Якщо ви хочете повернутись до чату пізніше, попросіть іншого учасника групи додати вас знову.</li>
 </ul>
+
+<p>Ви також можете “Заглушити” групу - це означає, що ви будете отримувати усі повідомлення та можете писати у групу, але ви більше не будете отримувати сповіщення про нові повідомлення.</p>
     
       <h3 id="клонування-групи">
         
@@ -574,6 +569,212 @@ or right-click the group in the chat list (Desktop).</p>
 <p>Нова група є <strong>цілком незалежною</strong> від оригінальної,
 котра продовжує працювати як раніше.</p>
     
+      <h3 id="how-many-members-can-participate-in-a-single-group">
+        
+        
+          How many members can participate in a single group? <a href="#how-many-members-can-participate-in-a-single-group" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>There is no strict technical limit,
+but more than 150 is not recommended.</p>
+
+<p>As groups get larger, they can become socially unstable and may need a hierarchy -
+where Delta Chat is a private messenger for chatting with <a href="#groups">equal rights</a>.
+See <a href="https://en.wikipedia.org/wiki/Dunbar%27s_number">Dunbar’s number</a> for more insights.</p>
+    
+      <h2 id="channels">
+        
+        
+          Channels <a href="#channels" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Channels are a one-to-many tool for broadcasting messages.</p>
+    
+      <h3 id="subscribe-to-a-channel">
+        
+        
+          Subscribe to a channel <a href="#subscribe-to-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>Scan the <img style="vertical-align:middle; height:1.3em; margin:1px" src="../qr-icon.png" /> <strong>QR code</strong>
+or tap the <strong>invite link</strong> you got from the channel owner.</li>
+</ul>
+
+<p>That’s all!
+You will receive a few of the messages from the channel history
+and, from that point on, all new messages from the channel.</p>
+
+<p><strong>Don’t worry,</strong> if that does not happen immediately.
+Once the channel owner comes online, your join request will be processed.</p>
+
+<p>As all of Delta Chat, also Channels are private and decentralized,
+there is no public discovery.</p>
+
+<p>Other channel subscribers will not see that you subscribed and cannot message you.
+The channel owner, however, can message you.
+They will also see that you read a message unless you have read receipts disabled.</p>
+
+<p>If you do not want to share your main profile,
+you can also create a <a href="#multiple-accounts">dedicated profile</a> for joining a channel.</p>
+    
+      <h3 id="create-a-channel">
+        
+        
+          Create a channel <a href="#create-a-channel" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>Tap <strong>New Chat</strong> and choose <strong>New Channel</strong>.</p>
+  </li>
+  <li>
+    <p>Enter a <strong>name</strong>, optionally set an <strong>image</strong> and <strong>description</strong>, and hit the <strong>Create</strong> button.</p>
+  </li>
+  <li>
+    <p>You can now send and manage messages as usual.</p>
+  </li>
+  <li>
+    <p>From the channel’s profile, <strong>share the QR code or invite link with others</strong>.</p>
+  </li>
+</ul>
+
+<p>Subscribers will receive your messages,
+but they cannot send messages in your channel.
+When subscribing, they will receive <strong>a few of the latest messages of the channel history</strong>.</p>
+
+<p>You can see the <strong>view count</strong> beside each message.
+Note that this only counts subscribers who have read receipts enabled,
+so the real view count may be larger.</p>
+    
+      <h3 id="how-many-subscribers-can-a-channel-have">
+        
+        
+          How many subscribers can a channel have? <a href="#how-many-subscribers-can-a-channel-have" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>Channels are designed for much larger audiences than <a href="#groups">groups</a>.</p>
+
+<p>The practical limit depends on the used <a href="#relays">relay</a>,
+so there is no single fixed number that applies everywhere.</p>
+
+<p>For really large channels with several tens of thousands of subscribers,
+we recommend using a <a href="#multiple-accounts">dedicated profile</a> for the channel
+and checking whether the relay is suitable.</p>
+
+<p>But don’t be too hesitant: Delta Chat is designed to be relay-agnostic,
+so you can change your relay at any point easily -
+your existing subscribers will not even notice.
+You only have to update the invite link you share with new subscribers in that case.</p>
+    
+      <h2 id="calls">
+        
+        
+          Calls <a href="#calls" class="anchor"></a>
+        
+        
+      </h2>
+
+<p>Delta Chat supports one-to-one <strong>audio calls</strong> and <strong>video calls</strong>.</p>
+
+<p>Calls are supported on Desktop, Ubuntu Touch, iOS and Android 8 and newer.</p>
+    
+      <h3 id="place-a-call">
+        
+        
+          Place a call <a href="#place-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>In a one-to-one chat, tap the 📞 <strong>call icon</strong>.</p>
+  </li>
+  <li>
+    <p>This opens a small menu
+where you can choose whether to place an <strong>Audio Call</strong> or a <strong>Video Call</strong>.</p>
+  </li>
+</ul>
+    
+      <h3 id="accept-or-reject-a-call">
+        
+        
+          Accept or reject a call <a href="#accept-or-reject-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>When someone calls you,
+Delta Chat shows an <strong>incoming call screen</strong> or notification.</p>
+  </li>
+  <li>
+    <p>Tap <strong>Accept</strong> to answer
+or <strong>Decline</strong> to reject the call.</p>
+  </li>
+</ul>
+    
+      <h3 id="during-a-call">
+        
+        
+          During a call <a href="#during-a-call" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>You can <strong>mute</strong> your microphone.</p>
+  </li>
+  <li>
+    <p>You can <strong>enable or disable your camera</strong>.</p>
+  </li>
+  <li>
+    <p>On mobile, you can <strong>switch between front and back cameras</strong>.</p>
+  </li>
+</ul>
+
+<p>Depending on the device, you can also select the audio output or use picture-in-picture.
+On desktop, the call is using a dedicated window
+and you can continue using the main Delta Chat window as usual.</p>
+    
+      <h3 id="missed-calls-and-notifications">
+        
+        
+          Missed calls and notifications <a href="#missed-calls-and-notifications" class="anchor"></a>
+        
+        
+      </h3>
+
+<ul>
+  <li>
+    <p>If you do not answer, do not hear the ringing, or do not have your device at hand,
+the call appears as a <strong>missed call</strong>.</p>
+  </li>
+  <li>
+    <p><strong>Only your accepted contacts</strong> can make your device ring.
+Contact requests will appear as usual and will not ring.</p>
+  </li>
+  <li>
+    <p>At <strong>Settings → Notifications → Calls</strong>,
+you can disable the special call ringing screen completely.
+If you do so, you will not be disturbed by any ringing notification,
+you can still pick up the call by tapping the incoming call message bubble in its chat.</p>
+  </li>
+</ul>
+    
       <h2 id="webxdc">
         
         
@@ -831,7 +1032,7 @@ Welcome to the power of the interoperable chatmail relay network :)</p>
     <p>Ще раз упевніться, що обидва пристрої підключені до <strong>одного Wi-Fi або мережі</strong></p>
   </li>
   <li>
-    <p>У <strong>Windows</strong> перейдіть до <strong>Панель керування / Мережа та Інтернет</strong> і переконайтеся, що <strong>Приватна мережа</strong> вибрано як “Тип мережевого профілю” (після перенесення ви можете повернути початкове значення)</p>
+    <p>У <strong>Windows</strong> перейдіть до “Панель керування / Мережа та Інтернет” і переконайтеся, що <strong>Приватна мережа</strong> вибрано як “Тип мережевого профілю” (після перенесення ви можете повернути початкове значення)</p>
   </li>
   <li>
     <p>На <strong>iOS</strong> переконайтеся, що доступ до “Системні налаштування / Програми / Delta Chat / <strong>Локальна мережа</strong>” дозволено</p>
@@ -904,10 +1105,10 @@ Welcome to the power of the interoperable chatmail relay network :)</p>
         
       </h2>
     
-      <h3 id="експериментальні-функції">
+      <h3 id="experiments">
         
         
-          Експериментальні функції <a href="#експериментальні-функції" class="anchor"></a>
+          Експериментальні функції <a href="#experiments" class="anchor"></a>
         
         
       </h3>
@@ -937,22 +1138,26 @@ Relays are operated by different groups and people.</p>
 <p>By default, after installation, a relay is <strong>automatically set up</strong>,
 so you do not need to care about that.
 However, if you want to,
-you can configure relays at At <strong>Settings → Advanced → Relays</strong>:</p>
+you can configure relays at <strong>Settings → Advanced → Relays</strong>:</p>
 
 <ul>
   <li>
     <p>You can <strong>add</strong> a relay by scanning its QR code;
-<a href="https://chatmail.at/relays">https://chatmail.at/relays</a> shows some known ones.
-If you have multiple relays, your will receive messages on all of them.</p>
+<a href="https://chatmail.at/relays">chatmail.at/relays</a> shows some known ones.
+If you have multiple relays, you will receive messages on all of them.
+Contacts learn your current relays automatically when you message them.</p>
   </li>
   <li>
-    <p>The <strong>default</strong> defines the one where your chat partners send future messages to.</p>
+    <p>Tap on a relay to set it as <strong>used for sending</strong>.</p>
   </li>
   <li>
     <p>If you <strong>remove</strong> a relay,
-make sure another default relay was used for a sufficient amount of time.
-Otherwise, messages from your chat partners won’t reach you.
-If in doubt, remove later.</p>
+contacts who only know this relay may not reach you until you message them again.
+To stay reachable in the meantime, choose <strong>Hide from Contacts</strong> in the confirmation dialog
+instead of removing it right away.</p>
+  </li>
+  <li>
+    <p>To <strong>show</strong> a hidden relay again, tap on it.</p>
   </li>
 </ul>
 
@@ -1066,9 +1271,7 @@ to send anonymous usage statistics.</p>
         
       </h3>
 
-<ul>
-  <li>Дивіться <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Стандарти, що використовуються у Delta Chat</a>.</li>
-</ul>
+<p>Дивіться <a href="https://github.com/chatmail/core/blob/main/standards.md#standards-used-in-delta-chat">Стандарти, що використовуються у Delta Chat</a>.</p>
     
       <h2 id="e2ee">
         
@@ -1095,6 +1298,10 @@ to send anonymous usage statistics.</p>
   <li>
     <p><a href="https://autocrypt.org">Autocrypt</a> використовується для автоматичного встановлення наскрізного шифрування між контактами і всіма учасниками групового чату.</p>
   </li>
+  <li>
+    <p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026, 
+will bring post-quantum resistant encryption and forward secrecy.</p>
+  </li>
   <li>
     <p><a href="https://github.com/chatmail/core/blob/main/spec.md#attaching-a-contact-to-a-message">Поширення контакту в чаті</a> дозволяє отримувачам використовувати наскрізне шифрування з контактом.</p>
   </li>
@@ -1246,6 +1453,29 @@ with the knowledge that all their data, along with all metadata, will be deleted
 Moreover, if a device is seized then chat contacts using short-lived profiles
 can not be identified easily.</p>
     
+      <h3 id="who-sees-my-ip-address">
+        
+        
+          Who sees my IP Address? <a href="#who-sees-my-ip-address" class="anchor"></a>
+        
+        
+      </h3>
+
+<p>The used <a href="#relays">relays</a> need to know your IP Address,
+as well as sometimes your contact’s devices if you have a <a href="#calls">call</a>
+or use <a href="#webxdc">apps</a> together.</p>
+
+<p>IP Addresses are needed for connectivity and efficiency.
+Delta Chat neither persists nor exposes them.
+Note that IP Addresses
+are not like an address you give to a delivery service,
+but typically less precise, often defining city or region only.</p>
+
+<p>If you see your IP Address as a risk,
+we recommend to use a VPN for the whole system.
+Per-app options leave gaps across your system.
+For example, tapping a link can expose IP Addresses to unknown parties, which is by far the larger risk.</p>
+    
       <h3 id="sealedsender">
         
         
@@ -1272,11 +1502,13 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>Ні, поки ще ні.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
 <p>Delta Chat наразі не підтримує ідеальну пряму секретність (Perfect Forward Secrecy, PFS). Це означає, що якщо ваш приватний ключ для розшифрування буде скомпрометовано, а хтось заздалегідь зібрав ваші повідомлення під час передачі, він зможе розшифрувати та прочитати їх, використовуючи зламаний ключ. Зверніть увагу, що пряма секретність підвищує рівень безпеки лише в тому разі, якщо ви видаляєте повідомлення. Інакше, якщо хтось отримує доступ до ваших ключів розшифрування, він зазвичай також має доступ до всіх ваших невидалених повідомлень і навіть не потребує розшифровувати заздалегідь перехоплені дані.</p>
 
-<p>Ми розробили підхід Forward Secrecy, який витримав початкову експертизу від деяких криптографів та експертів з реалізації але чекає на більш офіційний звіт щоб переконатися, що він надійно працює в об’єднаних системах обміну повідомленнями та при використанні декількох пристроїв, перш ніж його можна буде реалізувати в <a href="https://github.com/chatmail/core">ядрі чату</a>, що зробить його доступним у всіх <a href="https://chatmail.at/clients">клієнтах чату</a>.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will provide reliable deletion (forward secrecy) through automatic key rotation.
+This approach is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="pqc">
         
@@ -1286,9 +1518,13 @@ but an implementation has not been agreed as a priority yet.</p>
         
       </h3>
 
-<p>Ні, поки ще ні.</p>
+<p>Not yet, but it’s coming with <a href="https://autocrypt2.org">Autocrypt v2</a>.</p>
 
-<p>Delta Chat використовує бібліотеку Rust OpenPGP <a href="https://github.com/rpgp/rpgp">rPGP</a> яка підтримує останню версію <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>. Ми плануємо додати підтримку PQC у <a href="https://github.com/chatmail/core">chatmail core</a> після того, як проект буде завершено у IETF у співпраці з іншими розробниками OpenPGP.</p>
+<p><a href="https://autocrypt2.org">Autocrypt v2</a>, scheduled for full implementation in 2026,
+will bring post-quantum resistant encryption to protect against quantum computer attacks.
+Delta Chat uses the Rust OpenPGP library <a href="https://github.com/rpgp/rpgp">rPGP</a>
+which supports the latest <a href="https://datatracker.ietf.org/doc/draft-ietf-openpgp-pqc/">IETF Post-Quantum-Cryptography OpenPGP draft</a>.
+The implementation is specified in the <a href="https://datatracker.ietf.org/doc/draft-autocrypt-openpgp-v2-cert/">Autocrypt v2 OpenPGP Certificates</a> draft.</p>
     
       <h3 id="як-я-можу-вручну-перевірити-інформацію-про-шифрування">
         
@@ -1345,7 +1581,7 @@ you need to look it up in the “keypairs” SQLite table of a profile backup ta
     <p>Починаючи з 2023 року, ми виправили проблеми з безпекою та конфіденційністю у функції “веб застосунків, що поширені у чаті”, пов’язані зі збоями в роботі пісочниці особливо в Chromium. Згодом ми отримали незалежний аудит безпеки аудит безпеки від Cure53, і всі знайдені проблеми були виправлені в серії додатків 1.36, випущених у квітні 2023 року. Повну історію про наскрізну безпеку в Інтернеті дивіться <a href="https://delta.chat/en/2023-05-22-webxdc-security">тут</a>.</p>
   </li>
   <li>
-    <p>Починаючи з 2023 року <a href="https://cure53.de">Cure53</a> проаналізував транспортне шифрування мережевих з’єднань Delta Chat і відтворюване налаштування поштового сервера як <a href="https://delta.chat/uk/serverguide">рекомендовано на цьому сайті</a>. Ви можете прочитати більше про аудит <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">у нашому блозі</a> або прочитайте <a href="https://delta.chat/assets/blog/MER-01-report.pdf">повний звіт тут</a>.</p>
+    <p>Починаючи з 2023 року <a href="https://cure53.de">Cure53</a> проаналізував транспортне шифрування мережевих з’єднань Delta Chat і відтворюване налаштування поштового сервера як <a href="https://delta.chat/serverguide">рекомендовано на цьому сайті</a>. Ви можете прочитати більше про аудит <a href="https://delta.chat/en/2023-03-27-third-independent-security-audit">у нашому блозі</a> або прочитайте <a href="https://delta.chat/assets/blog/MER-01-report.pdf">повний звіт тут</a>.</p>
   </li>
   <li>
     <p>У 2020 році <a href="https://includesecurity.com">Include Security</a> проаналізувала Rust-<a href="https://github.com/deltachat/deltachat-core-rust/">ядро</a> Delta Chat і бібліотеки <a href="https://github.com/async-email/async-imap">IMAP</a>, <a href="https://github.com/async-email/async-smtp">SMTP</a> та <a href="https://github.com/async-email/async-native-tls">TLS</a>. Він не виявив критичних або серйозних проблем. У звіті виявлено кілька слабких місць середнього ступеня тяжкості – вони самі по собі не становлять загрози для користувачів Delta Chat оскільки вони залежать від середовища, у якому використовується Delta Chat. З міркувань зручності використання та сумісності ми не можемо пом’якшити їх усі тому вирішили надати рекомендації щодо безпеки користувачам, яким загрожує небезпека. Ви можете прочитати <a href="https://delta.chat/assets/blog/2020-second-security-review.pdf">повний звіт тут</a>.</p>
@@ -1419,7 +1655,14 @@ Google Play Store, F-Droid, Huawei App Gallery, iOS and macOS App Store, Microso
 
 <ul>
   <li>
-    <p>Проект ЄС <a href="https://nextleap.eu">NEXTLEAP</a> фінансував дослідження та впровадження верифікованих груп і протоколів встановлення контактів у 2017 та 2018 роках, а також допоміг інтегрувати наскрізне шифрування через <a href="https://autocrypt.org">Autocrypt</a>.</p>
+    <p>У 2023 та 2024 роках нас прийняли до програми Next Generation Internet (NGI) за нашу роботу над <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>, а також у співпраці з партнерами, які працюють над <a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, <a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, <a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> та <a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. Усі ці проєкти частково завершені або будуть завершені на початку 2025 року.</p>
+  </li>
+  <li>
+    <p>У 2021 році ми отримали подальше фінансування від ЄС на дві пропозиції щодо Інтернету наступного покоління а саме на <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - каталог перенесення провайдерів електронної пошти</a> (~97 тис. євро) та <a href="https://nlnet.nl/project/EmailPorting/">AEAP - перенесення адрес електронної пошти</a> (~90 тис. євро), що дозволило нам покращити багатопрофільну підтримку, вдосконалити налаштування контактів та груп за допомогою QR-коду та багато інших мережевих покращень на всіх платформах.</p>
+  </li>
+  <li>
+    <p>Фонд <a href="https://nlnet.nl/">NLnet</a> виділив у 2019/2020 роках 46 тисяч євро на
+завершення прив’язок Rust/Python та запуск екосистеми чат-ботів.</p>
   </li>
   <li>
     <p><a href="https://opentechfund.org">Open Technology Fund</a> надав нам два гранти. 
@@ -1432,25 +1675,7 @@ Google Play Store, F-Droid, Huawei App Gallery, iOS and macOS App Store, Microso
 і додати нові функції для всіх платформ.</p>
   </li>
   <li>
-    <p>Фонд <a href="https://nlnet.nl/">NLnet</a> виділив у 2019/2020 роках 46 тисяч євро на
-завершення прив’язок Rust/Python та запуск екосистеми чат-ботів.</p>
-  </li>
-  <li>
-    <p>In 2021 we received further EU funding for two Next-Generation-Internet
-proposals, namely for <a href="https://dapsi.ngi.eu/hall-of-fame/eppd/">EPPD - email provider portability directory</a> (~97K EUR) and <a href="https://nlnet.nl/project/EmailPorting/">AEAP - email address porting</a> (~90K EUR) which resulted in better multi-profile support, improved QR-code contact and group setups and many networking improvements on all platforms.</p>
-  </li>
-  <li>
-    <p>From End 2021 till March 2023 we received <em>Internet Freedom</em> funding (500K USD) from the
-U.S. Bureau of Democracy, Human Rights and Labor (DRL). 
-This funding supported our long-running goals to make Delta Chat more usable 
-and compatible with a wide range of email servers world-wide, and more resilient and secure
-in places often affected by internet censorship and shutdowns.</p>
-  </li>
-  <li>
-    <p>У 2023-2024 роках ми успішно завершили проєкт <a href="https://www.opentech.fund/projects-we-support/supported-projects/secure-chat-mail-with-delta-chat/">Secure Chatmail</a>, що фінансувався OTF, що дозволило нам запровадити гарантоване шифрування, створити <a href="https://delta.chat/chatmail">мережу серверів chatmail</a> та забезпечити “миттєву реєстрацію” у всіх застосунках, випущених з квітня 2024 року.</p>
-  </li>
-  <li>
-    <p>У 2023 та 2024 роках нас прийняли до програми Next Generation Internet (NGI) за нашу роботу над <a href="https://nlnet.nl/project/WebXDC-Push/">webxdc PUSH</a>, а також у співпраці з партнерами, які працюють над <a href="https://nlnet.nl/project/Webxdc-Evolve/">webxdc evolve</a>, <a href="https://nlnet.nl/project/WebXDC-XMPP/">webxdc XMPP</a>, <a href="https://nlnet.nl/project/DeltaTouch/">DeltaTouch</a> та <a href="https://nlnet.nl/project/DeltaTauri/">DeltaTauri</a>. Усі ці проєкти частково завершені або будуть завершені на початку 2025 року.</p>
+    <p>Проект ЄС <a href="https://nextleap.eu">NEXTLEAP</a> фінансував дослідження та впровадження верифікованих груп і протоколів встановлення контактів у 2017 та 2018 роках, а також допоміг інтегрувати наскрізне шифрування через <a href="https://autocrypt.org">Autocrypt</a>.</p>
   </li>
   <li>
     <p>Іноді ми отримуємо одноразові пожертви від приватних осіб. Наприклад, у 2021 році щедра приватна особа перерахував нам 4 тис. євро з повідомленням «так тримати!». 💜 Ми використовуємо такі пожертви для фінансування зборів на розвиток або для тимчасових витрат, які важко передбачити або відшкодувати за рахунок грантів державного фінансування. Отримання більшої кількості пожертв також допомагає нам стати більш незалежними та довгостроково життєздатними як спільнота контриб’юторів.</p>

src/main/java/chat/delta/rpc/BaseRpcTransport.java

@@ -14,7 +14,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutionException;
 
 /* Basic RPC Transport implementation */ 
-public abstract class BaseTransport implements Rpc.Transport {
+public abstract class BaseRpcTransport implements Rpc.RpcTransport {
   private final Map<Integer, SettableFuture<JsonNode>> requestFutures = new ConcurrentHashMap<>();
   private int requestId = 0;
   private final ObjectMapper mapper = new ObjectMapper();

src/main/java/chat/delta/rpc/Rpc.java

@@ -9,16 +9,16 @@ import chat.delta.rpc.types.*;
 
 public class Rpc {
 
-  public interface Transport {
+  public interface RpcTransport {
     void call(String method, JsonNode... params) throws RpcException;
     <T> T callForResult(TypeReference<T> resultType, String method, JsonNode... params) throws RpcException;
     ObjectMapper getObjectMapper();
   }
 
-  public final Transport transport;
+  public final RpcTransport transport;
   private final ObjectMapper mapper;
 
-  public Rpc(Transport transport) {
+  public Rpc(RpcTransport transport) {
     this.transport = transport;
     this.mapper = transport.getObjectMapper();
   }
@@ -53,6 +53,11 @@ public class Rpc {
     return transport.callForResult(new TypeReference<Event>(){}, "get_next_event");
   }
 
+  /** Waits for at least one event and return a batch of events. */
+  public java.util.List<Event> getNextEventBatch() throws RpcException {
+    return transport.callForResult(new TypeReference<java.util.List<Event>>(){}, "get_next_event_batch");
+  }
+
   public Integer addAccount() throws RpcException {
     return transport.callForResult(new TypeReference<Integer>(){}, "add_account");
   }
@@ -211,11 +216,11 @@ public class Rpc {
   }
 
   /**
-   * Set configuration values from a QR code. (technically from the URI that is stored in the qrcode)
-   * Before this function is called, `checkQr()` should confirm the type of the
-   * QR code is `account` or `webrtcInstance`.
+   * Set configuration values from a QR code (technically from the URI stored in it).
+   * Before this function is called, `check_qr()` should be used to get the QR code type.
    * <p>
-   * Internally, the function will call dc_set_config() with the appropriate keys,
+   * "DCACCOUNT:" and "DCLOGIN:" QR codes configure the account, but I/O mustn't be started for
+   * such QR codes, consider using [`Self::add_transport_from_qr`] which also restarts I/O.
    */
   public void setConfigFromQr(Integer accountId, String qrContent) throws RpcException {
     transport.call("set_config_from_qr", mapper.valueToTree(accountId), mapper.valueToTree(qrContent));
@@ -234,6 +239,11 @@ public class Rpc {
     return transport.callForResult(new TypeReference<java.util.Map<String, String>>(){}, "batch_get_config", mapper.valueToTree(accountId), mapper.valueToTree(keys));
   }
 
+  /** Returns all `ui.*` config keys that were set by the UI. */
+  public java.util.List<String> getAllUiConfigKeys(Integer accountId) throws RpcException {
+    return transport.callForResult(new TypeReference<java.util.List<String>>(){}, "get_all_ui_config_keys", mapper.valueToTree(accountId));
+  }
+
   public void setStockStrings(java.util.Map<String, String> strings) throws RpcException {
     transport.call("set_stock_strings", mapper.valueToTree(strings));
   }
@@ -279,6 +289,7 @@ public class Rpc {
    * from a server encoded in a QR code.
    * - [Self::list_transports()] to get a list of all configured transports.
    * - [Self::delete_transport()] to remove a transport.
+   * - [Self::set_transport_unpublished()] to set whether contacts see this transport.
    */
   public void addOrUpdateTransport(Integer accountId, EnteredLoginParam param) throws RpcException {
     transport.call("add_or_update_transport", mapper.valueToTree(accountId), mapper.valueToTree(param));
@@ -302,11 +313,22 @@ public class Rpc {
    * Returns the list of all email accounts that are used as a transport in the current profile.
    * Use [Self::add_or_update_transport()] to add or change a transport
    * and [Self::delete_transport()] to delete a transport.
+   * Use [Self::list_transports_ex()] to additionally query
+   * whether the transports are marked as 'unpublished'.
    */
   public java.util.List<EnteredLoginParam> listTransports(Integer accountId) throws RpcException {
     return transport.callForResult(new TypeReference<java.util.List<EnteredLoginParam>>(){}, "list_transports", mapper.valueToTree(accountId));
   }
 
+  /**
+   * Returns the list of all email accounts that are used as a transport in the current profile.
+   * Use [Self::add_or_update_transport()] to add or change a transport
+   * and [Self::delete_transport()] to delete a transport.
+   */
+  public java.util.List<TransportListEntry> listTransportsEx(Integer accountId) throws RpcException {
+    return transport.callForResult(new TypeReference<java.util.List<TransportListEntry>>(){}, "list_transports_ex", mapper.valueToTree(accountId));
+  }
+
   /**
    * Removes the transport with the specified email address
    * (i.e. [EnteredLoginParam::addr]).
@@ -315,6 +337,22 @@ public class Rpc {
     transport.call("delete_transport", mapper.valueToTree(accountId), mapper.valueToTree(addr));
   }
 
+  /**
+   * Change whether the transport is unpublished.
+   * <p>
+   * Unpublished transports are not advertised to contacts,
+   * and self-sent messages are not sent there,
+   * so that we don't cause extra messages to the corresponding inbox,
+   * but can still receive messages from contacts who don't know our new transport addresses yet.
+   * <p>
+   * The default is false, but when the user updates from a version that didn't have this flag,
+   * existing secondary transports are set to unpublished,
+   * so that an existing transport address doesn't suddenly get spammed with a lot of messages.
+   */
+  public void setTransportUnpublished(Integer accountId, String addr, Boolean unpublished) throws RpcException {
+    transport.call("set_transport_unpublished", mapper.valueToTree(accountId), mapper.valueToTree(addr), mapper.valueToTree(unpublished));
+  }
+
   /** Signal an ongoing process to stop. */
   public void stopOngoingProcess(Integer accountId) throws RpcException {
     transport.call("stop_ongoing_process", mapper.valueToTree(accountId));
@@ -358,7 +396,7 @@ public class Rpc {
   }
 
   /**
-   * Gets messages to be processed by the bot and returns their IDs.
+   * (deprecated) Gets messages to be processed by the bot and returns their IDs.
    * <p>
    * Only messages with database ID higher than `last_msg_id` config value
    * are returned. After processing the messages, the bot should
@@ -366,6 +404,13 @@ public class Rpc {
    * or manually updating the value to avoid getting already
    * processed messages.
    * <p>
+   * Deprecated 2026-04: This returns the message's id as soon as the first part arrives,
+   * even if it is not fully downloaded yet.
+   * The bot needs to wait for the message to be fully downloaded.
+   * Since this is usually not the desired behavior,
+   * bots should instead use the #DC_EVENT_INCOMING_MSG / [`types::events::EventType::IncomingMsg`]
+   * event for getting notified about new messages.
+   * <p>
    * [`markseen_msgs`]: Self::markseen_msgs
    */
   public java.util.List<Integer> getNextMsgs(Integer accountId) throws RpcException {
@@ -373,7 +418,7 @@ public class Rpc {
   }
 
   /**
-   * Waits for messages to be processed by the bot and returns their IDs.
+   * (deprecated) Waits for messages to be processed by the bot and returns their IDs.
    * <p>
    * This function is similar to [`get_next_msgs`],
    * but waits for internal new message notification before returning.
@@ -384,6 +429,13 @@ public class Rpc {
    * To shutdown the bot, stopping I/O can be used to interrupt
    * pending or next `wait_next_msgs` call.
    * <p>
+   * Deprecated 2026-04: This returns the message's id as soon as the first part arrives,
+   * even if it is not fully downloaded yet.
+   * The bot needs to wait for the message to be fully downloaded.
+   * Since this is usually not the desired behavior,
+   * bots should instead use the #DC_EVENT_INCOMING_MSG / [`types::events::EventType::IncomingMsg`]
+   * event for getting notified about new messages.
+   * <p>
    * [`get_next_msgs`]: Self::get_next_msgs
    */
   public java.util.List<Integer> waitNextMsgs(Integer accountId) throws RpcException {
@@ -391,23 +443,24 @@ public class Rpc {
   }
 
   /**
-   * Estimate the number of messages that will be deleted
-   * by the set_config()-options `delete_device_after` or `delete_server_after`.
+   * Estimates the number of messages that will be deleted
+   * by the `set_config()`-option `delete_device_after`.
+   * <p>
    * This is typically used to show the estimated impact to the user
    * before actually enabling deletion of old messages.
+   * <p>
+   * Messages in the "Saved Messages" chat are not counted as they will not be deleted automatically.
+   * <p>
+   * Parameters:
+   * - `from_server`: Deprecated, pass `false` here
+   * - `seconds`: Count messages older than the given number of seconds.
+   * <p>
+   * Returns the number of messages that are older than the given number of seconds.
    */
   public Integer estimateAutoDeletionCount(Integer accountId, Boolean fromServer, Integer seconds) throws RpcException {
     return transport.callForResult(new TypeReference<Integer>(){}, "estimate_auto_deletion_count", mapper.valueToTree(accountId), mapper.valueToTree(fromServer), mapper.valueToTree(seconds));
   }
 
-  public String initiateAutocryptKeyTransfer(Integer accountId) throws RpcException {
-    return transport.callForResult(new TypeReference<String>(){}, "initiate_autocrypt_key_transfer", mapper.valueToTree(accountId));
-  }
-
-  public void continueAutocryptKeyTransfer(Integer accountId, Integer messageId, String setupCode) throws RpcException {
-    transport.call("continue_autocrypt_key_transfer", mapper.valueToTree(accountId), mapper.valueToTree(messageId), mapper.valueToTree(setupCode));
-  }
-
   public java.util.List<Integer> getChatlistEntries(Integer accountId, Integer listFlags, String queryString, Integer queryContactId) throws RpcException {
     return transport.callForResult(new TypeReference<java.util.List<Integer>>(){}, "get_chatlist_entries", mapper.valueToTree(accountId), mapper.valueToTree(listFlags), mapper.valueToTree(queryString), mapper.valueToTree(queryContactId));
   }
@@ -449,11 +502,11 @@ public class Rpc {
    * Delete a chat.
    * <p>
    * Messages are deleted from the device and the chat database entry is deleted.
-   * After that, the event #DC_EVENT_MSGS_CHANGED is posted.
+   * After that, a `MsgsChanged` event is emitted.
+   * Messages are deleted from the server in background.
    * <p>
    * Things that are _not done_ implicitly:
    * <p>
-   * - Messages are **not deleted from the server**.
    * - The chat or the contact is **not blocked**, so new messages from the user/the group may appear as a contact request
    * and the user may create the chat again.
    * - **Groups are not left** - this would
@@ -499,6 +552,8 @@ public class Rpc {
    * if `checkQr()` returns `askVerifyContact` or `askVerifyGroup`
    * an out-of-band-verification can be joined using `secure_join()`
    * <p>
+   * @deprecated as of 2026-03; use create_qr_svg(get_chat_securejoin_qr_code()) instead.
+   * <p>
    * chat_id: If set to a group-chat-id,
    * the Verified-Group-Invite protocol is offered in the QR code;
    * works for protected groups as well as for normal groups.
@@ -664,9 +719,6 @@ public class Rpc {
    * because the word "channel" already appears a lot in the code,
    * which would make it hard to grep for it.
    * <p>
-   * After creation, the chat contains no recipients and is in _unpromoted_ state;
-   * see [`CommandApi::create_group_chat`] for more information on the unpromoted state.
-   * <p>
    * Returns the created chat's id.
    */
   public Integer createBroadcast(Integer accountId, String chatName) throws RpcException {
@@ -677,7 +729,8 @@ public class Rpc {
    * Set group name.
    * <p>
    * If the group is already _promoted_ (any message was sent to the group),
-   * all group members are informed by a special status message that is sent automatically by this function.
+   * or if this is a brodacast channel,
+   * all members are informed by a special status message that is sent automatically by this function.
    * <p>
    * Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
    */
@@ -685,11 +738,37 @@ public class Rpc {
     transport.call("set_chat_name", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(newName));
   }
 
+  /**
+   * Set group or broadcast channel description.
+   * <p>
+   * If the group is already _promoted_ (any message was sent to the group),
+   * or if this is a brodacast channel,
+   * all members are informed by a special status message that is sent automatically by this function.
+   * <p>
+   * Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
+   * <p>
+   * See also [`Self::get_chat_description`] / `getChatDescription()`.
+   */
+  public void setChatDescription(Integer accountId, Integer chatId, String description) throws RpcException {
+    transport.call("set_chat_description", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(description));
+  }
+
+  /**
+   * Load the chat description from the database.
+   * <p>
+   * UIs show this in the profile page of the chat,
+   * it is settable by [`Self::set_chat_description`] / `setChatDescription()`.
+   */
+  public String getChatDescription(Integer accountId, Integer chatId) throws RpcException {
+    return transport.callForResult(new TypeReference<String>(){}, "get_chat_description", mapper.valueToTree(accountId), mapper.valueToTree(chatId));
+  }
+
   /**
    * Set group profile image.
    * <p>
    * If the group is already _promoted_ (any message was sent to the group),
-   * all group members are informed by a special status message that is sent automatically by this function.
+   * or if this is a brodacast channel,
+   * all members are informed by a special status message that is sent automatically by this function.
    * <p>
    * Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
    * <p>
@@ -733,11 +812,26 @@ public class Rpc {
     return transport.callForResult(new TypeReference<Integer>(){}, "add_device_message", mapper.valueToTree(accountId), mapper.valueToTree(label), mapper.valueToTree(msg));
   }
 
+  /**
+   * Mark all messages in all chats as _noticed_.
+   * Skips messages from blocked contacts, but does not skip messages in muted chats.
+   * <p>
+   * _Noticed_ messages are no longer _fresh_ and do not count as being unseen
+   * but are still waiting for being marked as "seen" using markseen_msgs()
+   * (read receipts aren't sent for noticed messages).
+   * <p>
+   * Calling this function usually results in the event #DC_EVENT_MSGS_NOTICED.
+   * See also markseen_msgs().
+   */
+  public void marknoticedAllChats(Integer accountId) throws RpcException {
+    transport.call("marknoticed_all_chats", mapper.valueToTree(accountId));
+  }
+
   /**
    * Mark all messages in a chat as _noticed_.
    * _Noticed_ messages are no longer _fresh_ and do not count as being unseen
    * but are still waiting for being marked as "seen" using markseen_msgs()
-   * (IMAP/MDNs is not done for noticed messages).
+   * (read receipts aren't sent for noticed messages).
    * <p>
    * Calling this function usually results in the event #DC_EVENT_MSGS_NOTICED.
    * See also markseen_msgs().
@@ -746,6 +840,16 @@ public class Rpc {
     transport.call("marknoticed_chat", mapper.valueToTree(accountId), mapper.valueToTree(chatId));
   }
 
+  /**
+   * Marks the last incoming message in the chat as _fresh_.
+   * <p>
+   * UI can use this to offer a "mark unread" option,
+   * so that already noticed chats get a badge counter again.
+   */
+  public void markfreshChat(Integer accountId, Integer chatId) throws RpcException {
+    transport.call("markfresh_chat", mapper.valueToTree(accountId), mapper.valueToTree(chatId));
+  }
+
   /**
    * Returns the message that is immediately followed by the last seen
    * message.
@@ -815,8 +919,22 @@ public class Rpc {
   }
 
   /**
-   * Returns all messages of a particular chat.
+   * Get all message IDs belonging to a chat.
    * <p>
+   * The list is already sorted and starts with the oldest message.
+   * Clients should not try to re-sort the list as this would be an expensive action
+   * and would result in inconsistencies between clients.
+   * Note that the messages are not necessarily sorted by their ID or by their displayed timestamp;
+   * UIs need to handle both the case of descending message IDs
+   * and of decreasing timestamps.
+   * <p>
+   * Optionally, 'daymarkers' added to the ID array may help to
+   * implement virtual lists.
+   * <p>
+   * Parameters:
+   * <p>
+   * * chat_id The chat ID of which the messages IDs should be queried.
+   * * _info_only: Deprecated, pass `false` here.
    * * `add_daymarker` - If `true`, add day markers as `DC_MSG_ID_DAYMARKER` to the result,
    * e.g. [1234, 1237, 9, 1239]. The day marker timestamp is the midnight one for the
    * corresponding (following) day in the local timezone.
@@ -834,6 +952,14 @@ public class Rpc {
     return transport.callForResult(new TypeReference<java.util.List<Integer>>(){}, "get_existing_msg_ids", mapper.valueToTree(accountId), mapper.valueToTree(msgIds));
   }
 
+  /**
+   * Get all messages belonging to a chat.
+   * <p>
+   * Similar to `get_message_ids` / `getMessageIds`,
+   * see that function for details.
+   * The difference is that this function here returns a list of `MessageListItem`,
+   * which is an enum of a message or a daymarker.
+   */
   public java.util.List<MessageListItem> getMessageListItems(Integer accountId, Integer chatId, Boolean infoOnly, Boolean addDaymarker) throws RpcException {
     return transport.callForResult(new TypeReference<java.util.List<MessageListItem>>(){}, "get_message_list_items", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(infoOnly), mapper.valueToTree(addDaymarker));
   }
@@ -893,6 +1019,15 @@ public class Rpc {
     return transport.callForResult(new TypeReference<MessageInfo>(){}, "get_message_info_object", mapper.valueToTree(accountId), mapper.valueToTree(messageId));
   }
 
+  /**
+   * Returns count of read receipts on message.
+   * <p>
+   * This view count is meant as a feedback measure for the channel owner only.
+   */
+  public Integer getMessageReadReceiptCount(Integer accountId, Integer messageId) throws RpcException {
+    return transport.callForResult(new TypeReference<Integer>(){}, "get_message_read_receipt_count", mapper.valueToTree(accountId), mapper.valueToTree(messageId));
+  }
+
   /** Returns contacts that sent read receipts and the time of reading. */
   public java.util.List<MessageReadReceipt> getMessageReadReceipts(Integer accountId, Integer messageId) throws RpcException {
     return transport.callForResult(new TypeReference<java.util.List<MessageReadReceipt>>(){}, "get_message_read_receipts", mapper.valueToTree(accountId), mapper.valueToTree(messageId));
@@ -1074,11 +1209,6 @@ public class Rpc {
     return transport.callForResult(new TypeReference<String>(){}, "make_vcard", mapper.valueToTree(accountId), mapper.valueToTree(contacts));
   }
 
-  /** Sets vCard containing the given contacts to the message draft. */
-  public void setDraftVcard(Integer accountId, Integer msgId, java.util.List<Integer> contacts) throws RpcException {
-    transport.call("set_draft_vcard", mapper.valueToTree(accountId), mapper.valueToTree(msgId), mapper.valueToTree(contacts));
-  }
-
   /**
    * Returns the [`ChatId`] for the 1:1 chat with `contact_id` if it exists.
    * <p>
@@ -1150,12 +1280,19 @@ public class Rpc {
    * even if there is no concurrent call to [`CommandApi::provide_backup`],
    * but will fail after 60 seconds to avoid deadlocks.
    * <p>
+   * @deprecated as of 2026-03; use `create_qr_svg(get_backup_qr())` instead.
+   * <p>
    * Returns the QR code rendered as an SVG image.
    */
   public String getBackupQrSvg(Integer accountId) throws RpcException {
     return transport.callForResult(new TypeReference<String>(){}, "get_backup_qr_svg", mapper.valueToTree(accountId));
   }
 
+  /** Renders the given text as a QR code SVG image. */
+  public String createQrSvg(String text) throws RpcException {
+    return transport.callForResult(new TypeReference<String>(){}, "create_qr_svg", mapper.valueToTree(text));
+  }
+
   /**
    * Gets a backup from a remote provider.
    * <p>
@@ -1214,10 +1351,47 @@ public class Rpc {
     return transport.callForResult(new TypeReference<String>(){}, "get_connectivity_html", mapper.valueToTree(accountId));
   }
 
+  /**
+   * Sets current location.
+   * <p>
+   * Returns true if location streaming is currently
+   * enabled and locations should be updated.
+   * <p>
+   * Location is represented as latitude and longitude in degrees
+   * and horizontal accuracy in meters.
+   */
+  public Boolean setLocation(Float latitude, Float longitude, Float accuracy) throws RpcException {
+    return transport.callForResult(new TypeReference<Boolean>(){}, "set_location", mapper.valueToTree(latitude), mapper.valueToTree(longitude), mapper.valueToTree(accuracy));
+  }
+
   public java.util.List<Location> getLocations(Integer accountId, Integer chatId, Integer contactId, Integer timestampBegin, Integer timestampEnd) throws RpcException {
     return transport.callForResult(new TypeReference<java.util.List<Location>>(){}, "get_locations", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(contactId), mapper.valueToTree(timestampBegin), mapper.valueToTree(timestampEnd));
   }
 
+  /**
+   * Enables location streaming in chat identified by `chat_id` for `seconds` seconds.
+   * <p>
+   * Pass 0 as the number of seconds to disable location streaming in the chat.
+   */
+  public void sendLocationsToChat(Integer accountId, Integer chatId, Integer seconds) throws RpcException {
+    transport.call("send_locations_to_chat", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(seconds));
+  }
+
+  /** Returns whether any chat is sending locations. */
+  public Boolean isSendingLocations(Integer accountId) throws RpcException {
+    return transport.callForResult(new TypeReference<Boolean>(){}, "is_sending_locations", mapper.valueToTree(accountId));
+  }
+
+  /** Returns whether `chat_id` is sending locations. */
+  public Boolean isSendingLocationsToChat(Integer accountId, Integer chatId) throws RpcException {
+    return transport.callForResult(new TypeReference<Boolean>(){}, "is_sending_locations_to_chat", mapper.valueToTree(accountId), mapper.valueToTree(chatId));
+  }
+
+  /** Stops sending locations to all chats. */
+  public void stopSendingLocations() throws RpcException {
+    transport.call("stop_sending_locations");
+  }
+
   public void sendWebxdcStatusUpdate(Integer accountId, Integer instanceMsgId, String updateStr, String descr) throws RpcException {
     transport.call("send_webxdc_status_update", mapper.valueToTree(accountId), mapper.valueToTree(instanceMsgId), mapper.valueToTree(updateStr), mapper.valueToTree(descr));
   }
@@ -1286,8 +1460,8 @@ public class Rpc {
   }
 
   /** Starts an outgoing call. */
-  public Integer placeOutgoingCall(Integer accountId, Integer chatId, String placeCallInfo) throws RpcException {
-    return transport.callForResult(new TypeReference<Integer>(){}, "place_outgoing_call", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(placeCallInfo));
+  public Integer placeOutgoingCall(Integer accountId, Integer chatId, String placeCallInfo, Boolean hasVideo) throws RpcException {
+    return transport.callForResult(new TypeReference<Integer>(){}, "place_outgoing_call", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(placeCallInfo), mapper.valueToTree(hasVideo));
   }
 
   /** Accepts an incoming call. */
@@ -1353,17 +1527,18 @@ public class Rpc {
     transport.call("resend_messages", mapper.valueToTree(accountId), mapper.valueToTree(messageIds));
   }
 
+  /** @deprecated as of 2026-04; use `send_msg` with `Viewtype::Sticker` instead. */
   public Integer sendSticker(Integer accountId, Integer chatId, String stickerPath) throws RpcException {
     return transport.callForResult(new TypeReference<Integer>(){}, "send_sticker", mapper.valueToTree(accountId), mapper.valueToTree(chatId), mapper.valueToTree(stickerPath));
   }
 
   /**
-   * Send a reaction to message.
+   * Sends a reaction to message.
    * <p>
-   * Reaction is a string of emojis separated by spaces. Reaction to a
-   * single message can be sent multiple times. The last reaction
-   * received overrides all previously received reactions. It is
-   * possible to remove all reactions by sending an empty string.
+   * A reaction is a string that represents an emoji.
+   * You can call this function again to change the emoji;
+   * the last sent reaction overrides all previously sent reactions.
+   * It is possible to remove the reaction by sending an empty string.
    */
   public Integer sendReaction(Integer accountId, Integer messageId, java.util.List<String> reaction) throws RpcException {
     return transport.callForResult(new TypeReference<Integer>(){}, "send_reaction", mapper.valueToTree(accountId), mapper.valueToTree(messageId), mapper.valueToTree(reaction));

src/main/java/chat/delta/rpc/types/BasicChat.java

@@ -2,7 +2,7 @@
 package chat.delta.rpc.types;
 
 /**
- * cheaper version of fullchat, omits: - contacts - contact_ids - fresh_message_counter - ephemeral_timer - self_in_group - was_seen_recently - can_send
+ * cheaper version of fullchat, omits: - contact_ids - fresh_message_counter - ephemeral_timer - self_in_group - was_seen_recently - can_send
  * <p>
  * used when you only need the basic metadata of a chat like type, name, profile picture
  */

src/main/java/chat/delta/rpc/types/CallInfo.java

@@ -2,7 +2,7 @@
 package chat.delta.rpc.types;
 
 public class CallInfo {
-  /** True if SDP offer has a video. */
+  /** True if the call is started as a video call. */
   public Boolean hasVideo;
   /**
    * SDP offer.

src/main/java/chat/delta/rpc/types/Contact.java

@@ -38,7 +38,7 @@ public class Contact {
    * <p>
    * UI should display the information in the contact's profile as follows:
    * <p>
-   * - If `verifierId` != 0, display text "Introduced by ..." with the name and address of the contact formatted by `name_and_addr`/`nameAndAddr`. Prefix the text by a green checkmark.
+   * - If `verifierId` != 0, display text "Introduced by ..." with the name of the contact. Prefix the text by a green checkmark.
    * <p>
    * - If `verifierId` == 0 and `isVerified` != 0, display "Introduced" prefixed by a green checkmark.
    * <p>

src/main/java/chat/delta/rpc/types/EnteredLoginParam.java

@@ -12,6 +12,13 @@ public class EnteredLoginParam {
   /** TLS options: whether to allow invalid certificates and/or invalid hostnames. Default: Automatic */
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public EnteredCertificateChecks certificateChecks;
+  /**
+   * IMAP server folder.
+   * <p>
+   * Defaults to "INBOX" if not set. Should not be an empty string.
+   */
+  @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
+  public String imapFolder;
   /** Imap server port. */
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public Integer imapPort;

src/main/java/chat/delta/rpc/types/EventType.java

@@ -387,6 +387,8 @@ public abstract class EventType {
   public static class IncomingCallAccepted extends EventType {
     /** ID of the chat which the message belongs to. */
     public Integer chat_id;
+    /** The call was accepted from this device (process). */
+    public Boolean from_this_device;
     /** ID of the info message referring to the call. */
     public Integer msg_id;
   }
@@ -412,7 +414,9 @@ public abstract class EventType {
 /**
  * One or more transports has changed.
  * <p>
- * This event is used for tests to detect when transport synchronization messages arrives. UIs don't need to use it, it is unlikely that user modifies transports on multiple devices simultaneously.
+ * UI should update the list.
+ * <p>
+ * This event is emitted when transport synchronization messages arrives, but not when the UI modifies the transport list by itself.
  */
   public static class TransportsModified extends EventType {
   }

src/main/java/chat/delta/rpc/types/FullChat.java

@@ -7,7 +7,6 @@ public class FullChat {
   public ChatType chatType;
   public String color;
   public java.util.List<Integer> contactIds;
-  public java.util.List<Contact> contacts;
   public Integer ephemeralTimer;
   public Integer freshMessageCounter;
   public Integer id;

src/main/java/chat/delta/rpc/types/Message.java

@@ -12,6 +12,7 @@ public class Message {
   public String error;
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public String file;
+  /** The size of the file in bytes, if applicable. If message is a pre-message, then this is the size of the file to be downloaded. */
   public Integer fileBytes;
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public String fileMime;
@@ -31,7 +32,6 @@ public class Message {
   public Boolean isEdited;
   public Boolean isForwarded;
   public Boolean isInfo;
-  public Boolean isSetupmessage;
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public Integer originalMsgId;
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
@@ -46,8 +46,6 @@ public class Message {
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public Integer savedMessageId;
   public Contact sender;
-  @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
-  public String setupCodeBegin;
   /**
    * True if the message was correctly encrypted&signed, false otherwise. Historically, UIs showed a small padlock on the message then.
    * <p>

src/main/java/chat/delta/rpc/types/MessageLoadResult.java

@@ -22,6 +22,7 @@ public abstract class MessageLoadResult {
     public String error;
     @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
     public String file;
+    /** The size of the file in bytes, if applicable. If message is a pre-message, then this is the size of the file to be downloaded. */
     public Integer fileBytes;
     @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
     public String fileMime;
@@ -41,7 +42,6 @@ public abstract class MessageLoadResult {
     public Boolean isEdited;
     public Boolean isForwarded;
     public Boolean isInfo;
-    public Boolean isSetupmessage;
     @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
     public Integer originalMsgId;
     @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
@@ -56,8 +56,6 @@ public abstract class MessageLoadResult {
     @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
     public Integer savedMessageId;
     public Contact sender;
-    @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
-    public String setupCodeBegin;
     /**
      * True if the message was correctly encrypted&signed, false otherwise. Historically, UIs showed a small padlock on the message then.
      * <p>

src/main/java/chat/delta/rpc/types/Qr.java

@@ -25,6 +25,8 @@ public abstract class Qr {
     public String fingerprint;
     /** Invite number. */
     public String invitenumber;
+    /** Whether the inviter supports the new Securejoin v3 protocol */
+    public Boolean is_v3;
   }
 
 /** Ask the user whether to join the group. */
@@ -41,6 +43,8 @@ public abstract class Qr {
     public String grpname;
     /** Invite number. */
     public String invitenumber;
+    /** Whether the inviter supports the new Securejoin v3 protocol */
+    public Boolean is_v3;
   }
 
 /** Ask the user whether to join the broadcast channel. */
@@ -55,6 +59,8 @@ public abstract class Qr {
     public String grpid;
     /** Invite number. */
     public String invitenumber;
+    /** Whether the inviter supports the new Securejoin v3 protocol */
+    public Boolean is_v3;
     /** The user-visible name of this broadcast channel */
     public String name;
   }

src/main/java/chat/delta/rpc/types/Reactions.java

@@ -5,6 +5,6 @@ package chat.delta.rpc.types;
 public class Reactions {
   /** Unique reactions and their count, sorted in descending order. */
   public java.util.List<Reaction> reactions;
-  /** Map from a contact to it's reaction to message. */
+  /** Map from a contact to it's reaction to message. There is only a single reaction per contact, but this contains a list of reactions for historical reasons. */
   public java.util.Map<String, java.util.List<String>> reactionsByContact;
 }

src/main/java/chat/delta/rpc/types/SystemMessageType.java

@@ -4,6 +4,7 @@ package chat.delta.rpc.types;
 public enum SystemMessageType {
   Unknown,
   GroupNameChanged,
+  GroupDescriptionChanged,
   GroupImageChanged,
   MemberAddedToGroup,
   MemberRemovedFromGroup,

src/main/java/chat/delta/rpc/types/TransportListEntry.java

@@ -0,0 +1,9 @@
+/* Autogenerated file, do not edit manually */
+package chat.delta.rpc.types;
+
+public class TransportListEntry {
+  /** Whether this transport is set to 'unpublished'. See `set_transport_unpublished` / `setTransportUnpublished` for details. */
+  public Boolean isUnpublished;
+  /** The login data entered by the user. */
+  public EnteredLoginParam param;
+}

src/main/java/chat/delta/rpc/types/Viewtype.java

@@ -14,7 +14,7 @@ public enum Viewtype {
   Gif,
 
   /**
-   * Message containing a sticker, similar to image. NB: When sending, the message viewtype may be changed to `Image` by some heuristics like checking for transparent pixels. Use `Message::force_sticker()` to disable them.
+   * Message containing a sticker, similar to image.
    * <p>
    * If possible, the ui should display the image without borders in a transparent way. A click on a sticker will offer to install the sticker set in some future.
    */

src/main/java/chat/delta/rpc/types/WebxdcMessageInfo.java

@@ -2,6 +2,8 @@
 package chat.delta.rpc.types;
 
 public class WebxdcMessageInfo {
+  @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
+  public String orientation;
   /** if the Webxdc represents a document, then this is the name of the document */
   @com.fasterxml.jackson.annotation.JsonSetter(nulls = com.fasterxml.jackson.annotation.Nulls.SET)
   public String document;
@@ -15,6 +17,10 @@ public class WebxdcMessageInfo {
   public String icon;
   /** True if full internet access should be granted to the app. */
   public Boolean internetAccess;
+  /** Define if the local user is the one who initially shared the webxdc application in the chat. */
+  public Boolean isAppSender;
+  /** Define if the app runs in a broadcasting context. */
+  public Boolean isBroadcast;
   /**
    * The name of the app.
    * <p>

src/main/java/com/b44t/messenger/DcAccounts.java

@@ -2,63 +2,92 @@ package com.b44t.messenger;
 
 public class DcAccounts {
 
-    public DcAccounts(String dir) {
-        accountsCPtr = createAccountsCPtr(dir);
+  public DcAccounts(String dir, DcEventChannel channel) {
+    accountsCPtr = createAccountsCPtr(dir, channel);
+    if (accountsCPtr == 0) throw new RuntimeException("createAccountsCPtr() returned null pointer");
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unref();
+  }
+
+  public void unref() {
+    if (accountsCPtr != 0) {
+      unrefAccountsCPtr();
+      accountsCPtr = 0;
     }
+  }
 
-    @Override
-    protected void finalize() throws Throwable {
-        super.finalize();
-        unref();
+  public DcEventEmitter getEventEmitter() {
+    return new DcEventEmitter(getEventEmitterCPtr());
+  }
+
+  public DcJsonrpcInstance getJsonrpcInstance() {
+    return new DcJsonrpcInstance(getJsonrpcInstanceCPtr());
+  }
+
+  public void startIo() {
+    for (int accountId : getAll()) {
+      DcContext acc = getAccount(accountId);
+      if (acc.isEnabled()) {
+        acc.startIo();
+      }
     }
+  }
+  ;
 
-    public void unref() {
-        if (accountsCPtr != 0) {
-            unrefAccountsCPtr();
-            accountsCPtr = 0;
-        }
-    }
-
-    public DcEventEmitter         getEventEmitter      () { return new DcEventEmitter(getEventEmitterCPtr()); }
-    public DcJsonrpcInstance      getJsonrpcInstance   () { return new DcJsonrpcInstance(getJsonrpcInstanceCPtr()); }
-    public void            startIo              () {
-        for (int accountId : getAll()) {
-            DcContext acc = getAccount(accountId);
-            if (acc.isEnabled()) {
-                acc.startIo();
-            }
-        }
-    };
-    public native void            startIo2             ();
-    public native void            stopIo               ();
-    public native void            maybeNetwork         ();
-    public native void            setPushDeviceToken   (String token);
-    public native boolean         backgroundFetch      (int timeoutSeconds);
-    public native void            stopBackgroundFetch  ();
-
-    public native int             migrateAccount       (String dbfile);
-    public native boolean         removeAccount        (int accountId);
-    public native int[]           getAll               ();
-    public DcContext              getAccount           (int accountId) { return new DcContext(getAccountCPtr(accountId)); }
-    public DcContext              getSelectedAccount   () { return new DcContext(getSelectedAccountCPtr()); }
-    public native boolean         selectAccount        (int accountId);
-
-    // working with raw c-data
-    private long         accountsCPtr;          // CAVE: the name is referenced in the JNI
-    private native long  createAccountsCPtr     (String dir);
-    private native void  unrefAccountsCPtr      ();
-    private native long  getEventEmitterCPtr    ();
-    private native long  getJsonrpcInstanceCPtr ();
-    private native long  getAccountCPtr         (int accountId);
-    private native long  getSelectedAccountCPtr ();
-
-    public boolean isAllChatmail() {
-        for (int accountId : getAll()) {
-            DcContext dcContext = getAccount(accountId);
-            if (!dcContext.isChatmail()) {
-                return false;
-            }
-        }
-        return true;
+  public native void startIo2();
+
+  public native void stopIo();
+
+  public native void maybeNetwork();
+
+  public native void setPushDeviceToken(String token);
+
+  public native boolean backgroundFetch(int timeoutSeconds);
+
+  public native void stopBackgroundFetch();
+
+  public native int migrateAccount(String dbfile);
+
+  public native boolean removeAccount(int accountId);
+
+  public native int[] getAll();
+
+  public DcContext getAccount(int accountId) {
+    return new DcContext(getAccountCPtr(accountId));
+  }
+
+  public DcContext getSelectedAccount() {
+    return new DcContext(getSelectedAccountCPtr());
+  }
+
+  public native boolean selectAccount(int accountId);
+
+  // working with raw c-data
+  private long accountsCPtr; // CAVE: the name is referenced in the JNI
+
+  private native long createAccountsCPtr(String dir, DcEventChannel channel);
+
+  private native void unrefAccountsCPtr();
+
+  private native long getEventEmitterCPtr();
+
+  private native long getJsonrpcInstanceCPtr();
+
+  private native long getAccountCPtr(int accountId);
+
+  private native long getSelectedAccountCPtr();
+
+  public boolean isAllChatmail() {
+    for (int accountId : getAll()) {
+      DcContext dcContext = getAccount(accountId);
+      if (dcContext.getConfigInt("is_chatmail") == 0) {
+        return false;
+      }
     }
+    return true;
+  }
 }

src/main/java/com/b44t/messenger/DcBackupProvider.java

@@ -2,31 +2,35 @@ package com.b44t.messenger;
 
 public class DcBackupProvider {
 
-    public DcBackupProvider(long backupProviderCPtr) {
-        this.backupProviderCPtr = backupProviderCPtr;
+  public DcBackupProvider(long backupProviderCPtr) {
+    this.backupProviderCPtr = backupProviderCPtr;
+  }
+
+  public boolean isOk() {
+    return backupProviderCPtr != 0;
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unref();
+  }
+
+  public void unref() {
+    if (backupProviderCPtr != 0) {
+      unrefBackupProviderCPtr();
+      backupProviderCPtr = 0;
     }
+  }
 
-    public boolean isOk() {
-      return backupProviderCPtr != 0;
-    }
+  public native String getQr();
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unref();
-    }
+  public native String getQrSvg();
 
-    public void unref() {
-        if (backupProviderCPtr != 0) {
-            unrefBackupProviderCPtr();
-            backupProviderCPtr = 0;
-        }
-    }
+  public native void waitForReceiver();
 
-    public native String    getQr           ();
-    public native String    getQrSvg        ();
-    public native void      waitForReceiver ();
+  // working with raw c-data
+  private long backupProviderCPtr; // CAVE: the name is referenced in the JNI
 
-    // working with raw c-data
-    private long        backupProviderCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefBackupProviderCPtr();
+  private native void unrefBackupProviderCPtr();
 }

src/main/java/com/b44t/messenger/DcChat.java

@@ -1,76 +1,109 @@
 package com.b44t.messenger;
 
+import org.thoughtcrime.securesms.util.Util;
+
 public class DcChat {
 
-    public static final int DC_CHAT_TYPE_UNDEFINED   = 0;
-    public static final int DC_CHAT_TYPE_SINGLE      = 100;
-    public static final int DC_CHAT_TYPE_GROUP       = 120;
-    public static final int DC_CHAT_TYPE_MAILINGLIST = 140;
-    public static final int DC_CHAT_TYPE_OUT_BROADCAST = 160;
-    public static final int DC_CHAT_TYPE_IN_BROADCAST = 165;
+  public static final int DC_CHAT_TYPE_UNDEFINED = 0;
+  public static final int DC_CHAT_TYPE_SINGLE = 100;
+  public static final int DC_CHAT_TYPE_GROUP = 120;
+  public static final int DC_CHAT_TYPE_MAILINGLIST = 140;
+  public static final int DC_CHAT_TYPE_OUT_BROADCAST = 160;
+  public static final int DC_CHAT_TYPE_IN_BROADCAST = 165;
 
-    public static final int DC_CHAT_NO_CHAT          = 0;
-    public final static int DC_CHAT_ID_ARCHIVED_LINK = 6;
-    public final static int DC_CHAT_ID_ALLDONE_HINT  = 7;
-    public final static int DC_CHAT_ID_LAST_SPECIAL  = 9;
+  public static final int DC_CHAT_NO_CHAT = 0;
+  public static final int DC_CHAT_ID_ARCHIVED_LINK = 6;
+  public static final int DC_CHAT_ID_ALLDONE_HINT = 7;
+  public static final int DC_CHAT_ID_LAST_SPECIAL = 9;
 
-    public final static int DC_CHAT_VISIBILITY_NORMAL   = 0;
-    public final static int DC_CHAT_VISIBILITY_ARCHIVED = 1;
-    public final static int DC_CHAT_VISIBILITY_PINNED   = 2;
+  public static final int DC_CHAT_VISIBILITY_NORMAL = 0;
+  public static final int DC_CHAT_VISIBILITY_ARCHIVED = 1;
+  public static final int DC_CHAT_VISIBILITY_PINNED = 2;
 
-    private int accountId;
+  private int accountId;
 
-    public DcChat(int accountId, long chatCPtr) {
-        this.accountId = accountId;
-        this.chatCPtr = chatCPtr;
+  public DcChat(int accountId, long chatCPtr) {
+    this.accountId = accountId;
+    this.chatCPtr = chatCPtr;
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefChatCPtr();
+    chatCPtr = 0;
+  }
+
+  public int getAccountId() {
+    return accountId;
+  }
+
+  public native int getId();
+
+  public native int getType();
+
+  public native int getVisibility();
+
+  public native String getName();
+
+  public native String getMailinglistAddr();
+
+  public native String getProfileImage();
+
+  public native int getColor();
+
+  public native boolean isEncrypted();
+
+  public native boolean isUnpromoted();
+
+  public native boolean isSelfTalk();
+
+  public native boolean isDeviceTalk();
+
+  public native boolean canSend();
+
+  public native boolean isSendingLocations();
+
+  public native boolean isMuted();
+
+  public native boolean isContactRequest();
+
+  // aliases and higher-level tools
+
+  public boolean isMultiUser() {
+    int type = getType();
+    return type != DC_CHAT_TYPE_SINGLE;
+  }
+
+  public boolean shallLeaveBeforeDelete(DcContext dcContext) {
+    if (isInBroadcast()) {
+      final int[] members = dcContext.getChatContacts(getId());
+      return Util.contains(members, DcContact.DC_CONTACT_ID_SELF);
+    } else if (isMultiUser() && isEncrypted() && canSend() && !isOutBroadcast()) {
+      return true;
     }
+    return false;
+  }
 
-  @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefChatCPtr();
-        chatCPtr = 0;
-    }
+  public boolean isMailingList() {
+    return getType() == DC_CHAT_TYPE_MAILINGLIST;
+  }
 
-    public int            getAccountId      () { return accountId; }
-    public native int     getId             ();
-    public native int     getType           ();
-    public native int     getVisibility     ();
-    public native String  getName           ();
-    public native String  getMailinglistAddr();
-    public native String  getProfileImage   ();
-    public native int     getColor          ();
-    public native boolean isEncrypted       ();
-    public native boolean isUnpromoted      ();
-    public native boolean isSelfTalk        ();
-    public native boolean isDeviceTalk      ();
-    public native boolean canSend           ();
-    public native boolean isSendingLocations();
-    public native boolean isMuted           ();
-    public native boolean isContactRequest  ();
+  public boolean isInBroadcast() {
+    return getType() == DC_CHAT_TYPE_IN_BROADCAST;
+  }
 
+  public boolean isOutBroadcast() {
+    return getType() == DC_CHAT_TYPE_OUT_BROADCAST;
+  }
 
-    // aliases and higher-level tools
+  // working with raw c-data
 
-    public boolean isMultiUser() {
-      int type = getType();
-      return type != DC_CHAT_TYPE_SINGLE;
-    }
+  private long chatCPtr; // CAVE: the name is referenced in the JNI
 
-    public boolean isMailingList() {
-        return getType() == DC_CHAT_TYPE_MAILINGLIST;
-    }
-
-    public boolean isInBroadcast() {
-        return getType() == DC_CHAT_TYPE_IN_BROADCAST;
-    }
-    public boolean isOutBroadcast() {
-        return getType() == DC_CHAT_TYPE_OUT_BROADCAST;
-    }
-
-    // working with raw c-data
-
-    private long        chatCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefChatCPtr();
-    public long         getChatCPtr  () { return chatCPtr; }
+  private native void unrefChatCPtr();
 
+  public long getChatCPtr() {
+    return chatCPtr;
+  }
 }

src/main/java/com/b44t/messenger/DcChatlist.java

@@ -2,45 +2,64 @@ package com.b44t.messenger;
 
 public class DcChatlist {
 
-    private int accountId;
+  private int accountId;
 
-    public DcChatlist(int accountId, long chatlistCPtr) {
-        this.accountId = accountId;
-        this.chatlistCPtr = chatlistCPtr;
-    }
+  public DcChatlist(int accountId, long chatlistCPtr) {
+    this.accountId = accountId;
+    this.chatlistCPtr = chatlistCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefChatlistCPtr();
-        chatlistCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefChatlistCPtr();
+    chatlistCPtr = 0;
+  }
 
-    public int              getAccountId() { return accountId; }
-    public native int       getCnt    ();
-    public native int       getChatId (int index);
-    public DcChat           getChat   (int index) { return new DcChat(accountId, getChatCPtr(index)); }
-    public native int       getMsgId  (int index);
-    public DcMsg            getMsg    (int index) { return new DcMsg(getMsgCPtr(index)); }
-    public DcLot            getSummary(int index, DcChat chat) { return new DcLot(getSummaryCPtr(index, chat==null? 0 : chat.getChatCPtr())); }
+  public int getAccountId() {
+    return accountId;
+  }
 
-    public class Item {
-        public DcLot summary;
-        public int   msgId;
-        public int   chatId;
-    }
+  public native int getCnt();
 
-    public Item getItem(int index) {
-        Item item = new Item();
-        item.summary = getSummary(index, null);
-        item.msgId   = getMsgId(index);
-        item.chatId  = getChatId(index);
-        return item;
-    }
+  public native int getChatId(int index);
 
-    // working with raw c-data
-    private long        chatlistCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefChatlistCPtr();
-    private native long getChatCPtr      (int index);
-    private native long getMsgCPtr       (int index);
-    private native long getSummaryCPtr   (int index, long chatCPtr);
+  public DcChat getChat(int index) {
+    return new DcChat(accountId, getChatCPtr(index));
+  }
+
+  public native int getMsgId(int index);
+
+  public DcMsg getMsg(int index) {
+    return new DcMsg(getMsgCPtr(index));
+  }
+
+  public DcLot getSummary(int index, DcChat chat) {
+    return new DcLot(getSummaryCPtr(index, chat == null ? 0 : chat.getChatCPtr()));
+  }
+
+  public class Item {
+    public DcLot summary;
+    public int msgId;
+    public int chatId;
+  }
+
+  public Item getItem(int index) {
+    Item item = new Item();
+    item.summary = getSummary(index, null);
+    item.msgId = getMsgId(index);
+    item.chatId = getChatId(index);
+    return item;
+  }
+
+  // working with raw c-data
+  private long chatlistCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefChatlistCPtr();
+
+  private native long getChatCPtr(int index);
+
+  private native long getMsgCPtr(int index);
+
+  private native long getSummaryCPtr(int index, long chatCPtr);
 }

src/main/java/com/b44t/messenger/DcContact.java

@@ -2,67 +2,82 @@ package com.b44t.messenger;
 
 public class DcContact {
 
-    public final static int DC_CONTACT_ID_SELF               = 1;
-    public final static int DC_CONTACT_ID_INFO               = 2;
-    public final static int DC_CONTACT_ID_DEVICE             = 5;
-    public final static int DC_CONTACT_ID_LAST_SPECIAL       = 9;
-    public final static int DC_CONTACT_ID_NEW_CLASSIC_CONTACT= -1; // used by the UI, not valid to the core
-    public final static int DC_CONTACT_ID_NEW_GROUP          = -2; //      - " -
-    public final static int DC_CONTACT_ID_ADD_MEMBER         = -3; //      - " -
-    public final static int DC_CONTACT_ID_QR_INVITE          = -4; //      - " -
-    public final static int DC_CONTACT_ID_NEW_BROADCAST      = -5; //   - " -
-    public final static int DC_CONTACT_ID_ADD_ACCOUNT        = -6; //      - " -
-    public final static int DC_CONTACT_ID_NEW_UNENCRYPTED_GROUP = -7; //      - " -
+  public static final int DC_CONTACT_ID_SELF = 1;
+  public static final int DC_CONTACT_ID_INFO = 2;
+  public static final int DC_CONTACT_ID_DEVICE = 5;
+  public static final int DC_CONTACT_ID_LAST_SPECIAL = 9;
+  public static final int DC_CONTACT_ID_NEW_CLASSIC_CONTACT =
+      -1; // used by the UI, not valid to the core
+  public static final int DC_CONTACT_ID_NEW_GROUP = -2; //      - " -
+  public static final int DC_CONTACT_ID_ADD_MEMBER = -3; //      - " -
+  public static final int DC_CONTACT_ID_QR_INVITE = -4; //      - " -
+  public static final int DC_CONTACT_ID_NEW_BROADCAST = -5; //   - " -
+  public static final int DC_CONTACT_ID_ADD_ACCOUNT = -6; //      - " -
+  public static final int DC_CONTACT_ID_NEW_UNENCRYPTED_GROUP = -7; //      - " -
 
-    public DcContact(long contactCPtr) {
-        this.contactCPtr = contactCPtr;
+  public DcContact(long contactCPtr) {
+    this.contactCPtr = contactCPtr;
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefContactCPtr();
+    contactCPtr = 0;
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null || !(other instanceof DcContact)) {
+      return false;
     }
 
-    @Override
-    protected void finalize() throws Throwable {
-        super.finalize();
-        unrefContactCPtr();
-        contactCPtr = 0;
-    }
+    DcContact that = (DcContact) other;
+    return this.getId() == that.getId();
+  }
 
+  @Override
+  public int hashCode() {
+    return this.getId();
+  }
 
-    @Override
-    public boolean equals(Object other) {
-        if (other == null || !(other instanceof DcContact)) {
-            return false;
-        }
+  @Override
+  public String toString() {
+    return getAddr();
+  }
 
-        DcContact that = (DcContact) other;
-        return this.getId()==that.getId();
-    }
+  public native int getId();
 
-    @Override
-    public int hashCode() {
-        return this.getId();
-    }
+  public native String getName();
 
-    @Override
-    public String toString() {
-        return getAddr();
-    }
+  public native String getAuthName();
 
-    public native int     getId          ();
-    public native String  getName        ();
-    public native String  getAuthName    ();
-    public native String  getDisplayName ();
-    public native String  getAddr        ();
-    public native String  getProfileImage();
-    public native int     getColor       ();
-    public native String  getStatus      ();
-    public native long    getLastSeen    ();
-    public native boolean wasSeenRecently();
-    public native boolean isBlocked      ();
-    public native boolean isVerified     ();
-    public native boolean isKeyContact   ();
-    public native int     getVerifierId  ();
-    public native boolean isBot          ();
+  public native String getDisplayName();
 
-    // working with raw c-data
-    private long        contactCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefContactCPtr();
+  public native String getAddr();
+
+  public native String getProfileImage();
+
+  public native int getColor();
+
+  public native String getStatus();
+
+  public native long getLastSeen();
+
+  public native boolean wasSeenRecently();
+
+  public native boolean isBlocked();
+
+  public native boolean isVerified();
+
+  public native boolean isKeyContact();
+
+  public native int getVerifierId();
+
+  public native boolean isBot();
+
+  // working with raw c-data
+  private long contactCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefContactCPtr();
 }

src/main/java/com/b44t/messenger/DcContext.java

@@ -2,287 +2,409 @@ package com.b44t.messenger;
 
 public class DcContext {
 
-    public final static int DC_EVENT_INFO                        = 100;
-    public final static int DC_EVENT_WARNING                     = 300;
-    public final static int DC_EVENT_ERROR                       = 400;
-    public final static int DC_EVENT_ERROR_SELF_NOT_IN_GROUP     = 410;
-    public final static int DC_EVENT_MSGS_CHANGED                = 2000;
-    public final static int DC_EVENT_REACTIONS_CHANGED           = 2001;
-    public final static int DC_EVENT_INCOMING_REACTION           = 2002;
-    public final static int DC_EVENT_INCOMING_WEBXDC_NOTIFY      = 2003;
-    public final static int DC_EVENT_INCOMING_MSG                = 2005;
-    public final static int DC_EVENT_MSGS_NOTICED                = 2008;
-    public final static int DC_EVENT_MSG_DELIVERED               = 2010;
-    public final static int DC_EVENT_MSG_FAILED                  = 2012;
-    public final static int DC_EVENT_MSG_READ                    = 2015;
-    public final static int DC_EVENT_CHAT_MODIFIED               = 2020;
-    public final static int DC_EVENT_CHAT_EPHEMERAL_TIMER_MODIFIED = 2021;
-    public final static int DC_EVENT_CHAT_DELETED                = 2023;
-    public final static int DC_EVENT_CONTACTS_CHANGED            = 2030;
-    public final static int DC_EVENT_LOCATION_CHANGED            = 2035;
-    public final static int DC_EVENT_CONFIGURE_PROGRESS          = 2041;
-    public final static int DC_EVENT_IMEX_PROGRESS               = 2051;
-    public final static int DC_EVENT_IMEX_FILE_WRITTEN           = 2052;
-    public final static int DC_EVENT_SECUREJOIN_INVITER_PROGRESS = 2060;
-    public final static int DC_EVENT_SECUREJOIN_JOINER_PROGRESS  = 2061;
-    public final static int DC_EVENT_CONNECTIVITY_CHANGED        = 2100;
-    public final static int DC_EVENT_SELFAVATAR_CHANGED          = 2110;
-    public final static int DC_EVENT_WEBXDC_STATUS_UPDATE        = 2120;
-    public final static int DC_EVENT_WEBXDC_INSTANCE_DELETED     = 2121;
-    public final static int DC_EVENT_WEBXDC_REALTIME_DATA        = 2150;
-    public final static int DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE = 2200;
-    public final static int DC_EVENT_INCOMING_CALL               = 2550;
-    public final static int DC_EVENT_INCOMING_CALL_ACCEPTED      = 2560;
-    public final static int DC_EVENT_OUTGOING_CALL_ACCEPTED      = 2570;
-    public final static int DC_EVENT_CALL_ENDED                  = 2580;
+  public static final int DC_EVENT_INFO = 100;
+  public static final int DC_EVENT_WARNING = 300;
+  public static final int DC_EVENT_ERROR = 400;
+  public static final int DC_EVENT_ERROR_SELF_NOT_IN_GROUP = 410;
+  public static final int DC_EVENT_MSGS_CHANGED = 2000;
+  public static final int DC_EVENT_REACTIONS_CHANGED = 2001;
+  public static final int DC_EVENT_INCOMING_REACTION = 2002;
+  public static final int DC_EVENT_INCOMING_WEBXDC_NOTIFY = 2003;
+  public static final int DC_EVENT_INCOMING_MSG = 2005;
+  public static final int DC_EVENT_MSGS_NOTICED = 2008;
+  public static final int DC_EVENT_MSG_DELIVERED = 2010;
+  public static final int DC_EVENT_MSG_FAILED = 2012;
+  public static final int DC_EVENT_MSG_READ = 2015;
+  public static final int DC_EVENT_MSG_DELETED = 2016;
+  public static final int DC_EVENT_CHAT_MODIFIED = 2020;
+  public static final int DC_EVENT_CHAT_EPHEMERAL_TIMER_MODIFIED = 2021;
+  public static final int DC_EVENT_CHAT_DELETED = 2023;
+  public static final int DC_EVENT_CONTACTS_CHANGED = 2030;
+  public static final int DC_EVENT_LOCATION_CHANGED = 2035;
+  public static final int DC_EVENT_CONFIGURE_PROGRESS = 2041;
+  public static final int DC_EVENT_IMEX_PROGRESS = 2051;
+  public static final int DC_EVENT_IMEX_FILE_WRITTEN = 2052;
+  public static final int DC_EVENT_SECUREJOIN_INVITER_PROGRESS = 2060;
+  public static final int DC_EVENT_SECUREJOIN_JOINER_PROGRESS = 2061;
+  public static final int DC_EVENT_CONNECTIVITY_CHANGED = 2100;
+  public static final int DC_EVENT_SELFAVATAR_CHANGED = 2110;
+  public static final int DC_EVENT_WEBXDC_STATUS_UPDATE = 2120;
+  public static final int DC_EVENT_WEBXDC_INSTANCE_DELETED = 2121;
+  public static final int DC_EVENT_WEBXDC_REALTIME_DATA = 2150;
+  public static final int DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE = 2200;
+  public static final int DC_EVENT_INCOMING_CALL = 2550;
+  public static final int DC_EVENT_INCOMING_CALL_ACCEPTED = 2560;
+  public static final int DC_EVENT_OUTGOING_CALL_ACCEPTED = 2570;
+  public static final int DC_EVENT_CALL_ENDED = 2580;
+  public static final int DC_EVENT_TRANSPORTS_MODIFIED = 2600;
 
-    public final static int DC_IMEX_EXPORT_SELF_KEYS = 1;
-    public final static int DC_IMEX_IMPORT_SELF_KEYS = 2;
-    public final static int DC_IMEX_EXPORT_BACKUP    = 11;
-    public final static int DC_IMEX_IMPORT_BACKUP    = 12;
+  public static final int DC_IMEX_EXPORT_SELF_KEYS = 1;
+  public static final int DC_IMEX_IMPORT_SELF_KEYS = 2;
+  public static final int DC_IMEX_EXPORT_BACKUP = 11;
+  public static final int DC_IMEX_IMPORT_BACKUP = 12;
 
-    public final static int DC_GCL_VERIFIED_ONLY    = 1;
-    public final static int DC_GCL_ADD_SELF         = 2;
-    public final static int DC_GCL_ADDRESS          = 0x04;
-    public final static int DC_GCL_ARCHIVED_ONLY    = 0x01;
-    public final static int DC_GCL_NO_SPECIALS      = 0x02;
-    public final static int DC_GCL_ADD_ALLDONE_HINT = 0x04;
-    public final static int DC_GCL_FOR_FORWARDING   = 0x08;
+  public static final int DC_GCL_VERIFIED_ONLY = 1;
+  public static final int DC_GCL_ADD_SELF = 2;
+  public static final int DC_GCL_ADDRESS = 0x04;
+  public static final int DC_GCL_ARCHIVED_ONLY = 0x01;
+  public static final int DC_GCL_NO_SPECIALS = 0x02;
+  public static final int DC_GCL_ADD_ALLDONE_HINT = 0x04;
+  public static final int DC_GCL_FOR_FORWARDING = 0x08;
 
-    public final static int DC_GCM_ADDDAYMARKER = 0x01;
+  public static final int DC_GCM_ADDDAYMARKER = 0x01;
 
-    public final static int DC_QR_ASK_VERIFYCONTACT = 200;
-    public final static int DC_QR_ASK_VERIFYGROUP   = 202;
-    public final static int DC_QR_ASK_JOIN_BROADCAST= 204;
-    public final static int DC_QR_FPR_OK            = 210;
-    public final static int DC_QR_FPR_MISMATCH      = 220;
-    public final static int DC_QR_FPR_WITHOUT_ADDR  = 230;
-    public final static int DC_QR_ACCOUNT           = 250;
-    public final static int DC_QR_BACKUP2           = 252;
-    public final static int DC_QR_BACKUP_TOO_NEW    = 255;
-    public final static int DC_QR_WEBRTC            = 260;
-    public final static int DC_QR_PROXY             = 271;
-    public final static int DC_QR_ADDR              = 320;
-    public final static int DC_QR_TEXT              = 330;
-    public final static int DC_QR_URL               = 332;
-    public final static int DC_QR_ERROR             = 400;
-    public final static int DC_QR_WITHDRAW_VERIFYCONTACT = 500;
-    public final static int DC_QR_WITHDRAW_VERIFYGROUP   = 502;
-    public final static int DC_QR_WITHDRAW_JOINBROADCAST = 504;
-    public final static int DC_QR_REVIVE_VERIFYCONTACT   = 510;
-    public final static int DC_QR_REVIVE_VERIFYGROUP     = 512;
-    public final static int DC_QR_REVIVE_JOINBROADCAST   = 514;
-    public final static int DC_QR_LOGIN             = 520;
+  public static final int DC_QR_ASK_VERIFYCONTACT = 200;
+  public static final int DC_QR_ASK_VERIFYGROUP = 202;
+  public static final int DC_QR_ASK_JOIN_BROADCAST = 204;
+  public static final int DC_QR_FPR_OK = 210;
+  public static final int DC_QR_FPR_MISMATCH = 220;
+  public static final int DC_QR_FPR_WITHOUT_ADDR = 230;
+  public static final int DC_QR_ACCOUNT = 250;
+  public static final int DC_QR_BACKUP2 = 252;
+  public static final int DC_QR_BACKUP_TOO_NEW = 255;
+  public static final int DC_QR_WEBRTC = 260;
+  public static final int DC_QR_PROXY = 271;
+  public static final int DC_QR_ADDR = 320;
+  public static final int DC_QR_TEXT = 330;
+  public static final int DC_QR_URL = 332;
+  public static final int DC_QR_ERROR = 400;
+  public static final int DC_QR_WITHDRAW_VERIFYCONTACT = 500;
+  public static final int DC_QR_WITHDRAW_VERIFYGROUP = 502;
+  public static final int DC_QR_WITHDRAW_JOINBROADCAST = 504;
+  public static final int DC_QR_REVIVE_VERIFYCONTACT = 510;
+  public static final int DC_QR_REVIVE_VERIFYGROUP = 512;
+  public static final int DC_QR_REVIVE_JOINBROADCAST = 514;
+  public static final int DC_QR_LOGIN = 520;
 
-    public final static int DC_SOCKET_AUTO     = 0;
-    public final static int DC_SOCKET_SSL      = 1;
-    public final static int DC_SOCKET_STARTTLS = 2;
-    public final static int DC_SOCKET_PLAIN    = 3;
+  public static final int DC_SOCKET_AUTO = 0;
+  public static final int DC_SOCKET_SSL = 1;
+  public static final int DC_SOCKET_STARTTLS = 2;
+  public static final int DC_SOCKET_PLAIN = 3;
 
-    public final static int DC_SHOW_EMAILS_OFF               = 0;
-    public final static int DC_SHOW_EMAILS_ACCEPTED_CONTACTS = 1;
-    public final static int DC_SHOW_EMAILS_ALL               = 2;
+  public static final int DC_SHOW_EMAILS_OFF = 0;
+  public static final int DC_SHOW_EMAILS_ACCEPTED_CONTACTS = 1;
+  public static final int DC_SHOW_EMAILS_ALL = 2;
 
-    public final static int DC_MEDIA_QUALITY_BALANCED = 0;
-    public final static int DC_MEDIA_QUALITY_WORSE    = 1;
+  public static final int DC_MEDIA_QUALITY_BALANCED = 0;
+  public static final int DC_MEDIA_QUALITY_WORSE = 1;
 
-    public final static int DC_CONNECTIVITY_NOT_CONNECTED = 1000;
-    public final static int DC_CONNECTIVITY_CONNECTING = 2000;
-    public final static int DC_CONNECTIVITY_WORKING = 3000;
-    public final static int DC_CONNECTIVITY_CONNECTED = 4000;
+  public static final int DC_CONNECTIVITY_NOT_CONNECTED = 1000;
+  public static final int DC_CONNECTIVITY_CONNECTING = 2000;
+  public static final int DC_CONNECTIVITY_WORKING = 3000;
+  public static final int DC_CONNECTIVITY_CONNECTED = 4000;
 
-    private static final String CONFIG_ACCOUNT_ENABLED = "ui.enabled";
-    private static final String CONFIG_MUTE_MENTIONS_IF_MUTED = "ui.mute_mentions_if_muted";
+  private static final String CONFIG_ACCOUNT_ENABLED = "ui.enabled";
+  private static final String CONFIG_MUTE_MENTIONS_IF_MUTED = "ui.mute_mentions_if_muted";
 
-    // when using DcAccounts, use Rpc.addAccount() instead
-    public DcContext(String osName, String dbfile) {
-        contextCPtr = createContextCPtr(osName, dbfile);
+  // when using DcAccounts, use Rpc.addAccount() instead
+  public DcContext(String osName, String dbfile) {
+    contextCPtr = createContextCPtr(osName, dbfile);
+  }
+
+  public DcContext(long contextCPtr) {
+    this.contextCPtr = contextCPtr;
+  }
+
+  public boolean isOk() {
+    return contextCPtr != 0;
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    if (contextCPtr != 0) {
+      unrefContextCPtr();
+      contextCPtr = 0;
     }
+  }
 
-    public DcContext(long contextCPtr) {
-        this.contextCPtr = contextCPtr;
+  public native int getAccountId();
+
+  // when using DcAccounts, use DcAccounts.getEventEmitter() instead
+  public DcEventEmitter getEventEmitter() {
+    return new DcEventEmitter(getEventEmitterCPtr());
+  }
+
+  public native void setStockTranslation(int stockId, String translation);
+
+  public native String getBlobdir();
+
+  public native String getLastError();
+
+  public native void stopOngoingProcess();
+
+  public native int isConfigured();
+
+  public native boolean open(String passphrase);
+
+  public native boolean isOpen();
+
+  // when using DcAccounts, use DcAccounts.startIo() instead
+  public native void startIo();
+
+  // when using DcAccounts, use DcAccounts.stopIo() instead
+  public native void stopIo();
+
+  // when using DcAccounts, use DcAccounts.maybeNetwork() instead
+  public native void maybeNetwork();
+
+  public native void setConfig(String key, String value);
+
+  public void setConfigInt(String key, int value) {
+    setConfig(key, Integer.toString(value));
+  }
+
+  public native boolean setConfigFromQr(String qr);
+
+  public native String getConfig(String key);
+
+  public int getConfigInt(String key) {
+    return getConfigInt(key, 0);
+  }
+
+  public int getConfigInt(String key, int defValue) {
+    try {
+      return Integer.parseInt(getConfig(key));
+    } catch (Exception e) {
     }
+    return defValue;
+  }
 
-    public boolean isOk() {
-        return contextCPtr != 0;
-    }
+  public native String getInfo();
 
-    @Override
-    protected void finalize() throws Throwable {
-        super.finalize();
-        if (contextCPtr != 0) {
-            unrefContextCPtr();
-            contextCPtr = 0;
-        }
-    }
+  public native int getConnectivity();
 
-    public native int          getAccountId         ();
+  public native String getConnectivityHtml();
 
-    // when using DcAccounts, use DcAccounts.getEventEmitter() instead
-    public DcEventEmitter      getEventEmitter      () { return new DcEventEmitter(getEventEmitterCPtr()); }
+  public native void imex(int what, String dir);
 
-    public native void         setStockTranslation  (int stockId, String translation);
-    public native String       getBlobdir           ();
-    public native String       getLastError         ();
-    public native void         stopOngoingProcess   ();
-    public native int          isConfigured         ();
-    public native boolean      open                 (String passphrase);
-    public native boolean      isOpen               ();
+  public native String imexHasBackup(String dir);
 
-    // when using DcAccounts, use DcAccounts.startIo() instead
-    public native void         startIo              ();
+  public DcBackupProvider newBackupProvider() {
+    return new DcBackupProvider(newBackupProviderCPtr());
+  }
 
-    // when using DcAccounts, use DcAccounts.stopIo() instead
-    public native void         stopIo               ();
+  public native boolean receiveBackup(String qr);
 
-    // when using DcAccounts, use DcAccounts.maybeNetwork() instead
-    public native void         maybeNetwork         ();
+  public native boolean mayBeValidAddr(String addr);
 
-    public native void         setConfig            (String key, String value);
-    public void                setConfigInt         (String key, int value) { setConfig(key, Integer.toString(value)); }
-    public native boolean      setConfigFromQr      (String qr);
-    public native String       getConfig            (String key);
-    public int                 getConfigInt         (String key) { return getConfigInt(key, 0); }
-    public int                 getConfigInt         (String key, int defValue) { try{return Integer.parseInt(getConfig(key));} catch(Exception e) {} return defValue; }
-    public native String       getInfo              ();
-    public native int          getConnectivity      ();
-    public native String       getConnectivityHtml  ();
-    public native String       initiateKeyTransfer  ();
-    public native void         imex                 (int what, String dir);
-    public native String       imexHasBackup        (String dir);
-    public DcBackupProvider    newBackupProvider    () { return new DcBackupProvider(newBackupProviderCPtr()); }
-    public native boolean      receiveBackup        (String qr);
-    public native boolean      mayBeValidAddr       (String addr);
-    public native int          lookupContactIdByAddr(String addr);
-    public native int[]        getContacts          (int flags, String query);
-    public native int[]        getBlockedContacts   ();
-    public DcContact           getContact           (int contact_id) { return new DcContact(getContactCPtr(contact_id)); }
-    public native int          createContact        (String name, String addr);
-    public native void         blockContact         (int id, int block);
-    public native String       getContactEncrInfo   (int contact_id);
-    public native boolean      deleteContact        (int id);
-    public native int          addAddressBook       (String adrbook);
-    public DcChatlist          getChatlist          (int listflags, String query, int queryId) { return new DcChatlist(getAccountId(), getChatlistCPtr(listflags, query, queryId)); }
-    public DcChat              getChat              (int chat_id) { return new DcChat(getAccountId(), getChatCPtr(chat_id)); }
-    public native String       getChatEncrInfo      (int chat_id);
-    public native void         markseenMsgs         (int msg_ids[]);
-    public native void         marknoticedChat      (int chat_id);
-    public native void         setChatVisibility    (int chat_id, int visibility);
-    public native int          getChatIdByContactId (int contact_id);
-    public native int          createChatByContactId(int contact_id);
-    public native int          createGroupChat      (String name);
-    public native int          createBroadcastList  ();
-    public native boolean      isContactInChat      (int chat_id, int contact_id);
-    public native int          addContactToChat     (int chat_id, int contact_id);
-    public native int          removeContactFromChat(int chat_id, int contact_id);
-    public native void         setDraft             (int chat_id, DcMsg msg/*null=delete*/);
-    public DcMsg               getDraft             (int chat_id) { return new DcMsg(getDraftCPtr(chat_id)); }
-    public native int          setChatName          (int chat_id, String name);
-    public native int          setChatProfileImage  (int chat_id, String name);
-    public native int[]        getChatMsgs          (int chat_id, int flags, int marker1before);
-    public native int[]        searchMsgs           (int chat_id, String query);
-    public native int[]        getFreshMsgs         ();
-    public native int[]        getChatMedia         (int chat_id, int type1, int type2, int type3);
-    public native int[]        getChatContacts      (int chat_id);
-    public native int          getChatEphemeralTimer (int chat_id);
-    public native boolean      setChatEphemeralTimer (int chat_id, int timer);
-    public native boolean      setChatMuteDuration  (int chat_id, long duration);
-    public native void         deleteChat           (int chat_id);
-    public native void         blockChat            (int chat_id);
-    public native void         acceptChat           (int chat_id);
-    public DcMsg               getMsg               (int msg_id) { return new DcMsg(getMsgCPtr(msg_id)); }
-    public native void         sendEditRequest      (int msg_id, String text);
-    public native String       getMsgInfo           (int id);
-    public native String       getMsgHtml           (int msg_id);
-    public native void         downloadFullMsg      (int msg_id);
-    public native int          getFreshMsgCount     (int chat_id);
-    public native int          estimateDeletionCount(boolean from_server, long seconds);
-    public native void         deleteMsgs           (int msg_ids[]);
-    public native void         sendDeleteRequest    (int msg_ids[]);
-    public native void         forwardMsgs          (int msg_ids[], int chat_id);
-    public native void         saveMsgs             (int msg_ids[]);
-    public native boolean      resendMsgs           (int msg_ids[]);
-    public native int          sendMsg              (int chat_id, DcMsg msg);
-    public native int          sendTextMsg          (int chat_id, String text);
-    public native boolean      sendWebxdcStatusUpdate(int msg_id, String payload);
-    public native String       getWebxdcStatusUpdates(int msg_id, int last_known_serial);
-    public native void         setWebxdcIntegration (String file);
-    public native int          initWebxdcIntegration(int chat_id);
-    public native int          addDeviceMsg         (String label, DcMsg msg);
-    public native boolean      wasDeviceMsgEverAdded(String label);
-    public DcLot               checkQr              (String qr) { return new DcLot(checkQrCPtr(qr)); }
-    public native String       getSecurejoinQr      (int chat_id);
-    public native String       getSecurejoinQrSvg   (int chat_id);
-    public native String       createQrSvg          (String payload);
-    public native int          joinSecurejoin       (String qr);
-    public native void         sendLocationsToChat  (int chat_id, int seconds);
-    public native boolean      isSendingLocationsToChat(int chat_id);
-    public DcProvider          getProviderFromEmailWithDns (String email) { long cptr = getProviderFromEmailWithDnsCPtr(email); return cptr!=0 ? new DcProvider(cptr) : null; }
+  public native int lookupContactIdByAddr(String addr);
 
-    public boolean isEnabled() {
-      return !"0".equals(getConfig(CONFIG_ACCOUNT_ENABLED));
-    }
+  public native int[] getContacts(int flags, String query);
 
-    public void setEnabled(boolean enabled) {
-      setConfigInt(CONFIG_ACCOUNT_ENABLED, enabled? 1 : 0);
-      if (enabled) {
-        startIo();
-      } else {
-        stopIo();
-      }
-    }
+  public native int[] getBlockedContacts();
 
-    public boolean isMentionsEnabled() {
-      return getConfigInt(CONFIG_MUTE_MENTIONS_IF_MUTED) != 1;
-    }
+  public DcContact getContact(int contact_id) {
+    return new DcContact(getContactCPtr(contact_id));
+  }
 
-    public void setMentionsEnabled(boolean enabled) {
-      setConfigInt(CONFIG_MUTE_MENTIONS_IF_MUTED, enabled? 0 : 1);
-    }
+  public native int createContact(String name, String addr);
 
-    public String getName() {
-      String displayname = getConfig("displayname");
-      if (displayname.isEmpty()) {
-        displayname = getContact(DcContact.DC_CONTACT_ID_SELF).getAddr();
-      }
-      return displayname;
-    }
+  public native void blockContact(int id, int block);
 
-    public boolean isChatmail() {
-      return getConfigInt("is_chatmail") == 1;
-    }
+  public native String getContactEncrInfo(int contact_id);
 
-    public boolean isMuted() {
-      return getConfigInt("is_muted") == 1;
-    }
+  public native boolean deleteContact(int id);
 
-    public void setMuted(boolean muted) {
-      setConfigInt("is_muted", muted? 1 : 0);
-    }
+  public native int addAddressBook(String adrbook);
 
-    public void restartIo() {
-      if (!isEnabled()) return;
-      stopIo();
+  public DcChatlist getChatlist(int listflags, String query, int queryId) {
+    return new DcChatlist(getAccountId(), getChatlistCPtr(listflags, query, queryId));
+  }
+
+  public DcChat getChat(int chat_id) {
+    return new DcChat(getAccountId(), getChatCPtr(chat_id));
+  }
+
+  public native String getChatEncrInfo(int chat_id);
+
+  public native void markseenMsgs(int msg_ids[]);
+
+  public native void marknoticedChat(int chat_id);
+
+  public native void setChatVisibility(int chat_id, int visibility);
+
+  public native int getChatIdByContactId(int contact_id);
+
+  public native int createChatByContactId(int contact_id);
+
+  public native int createGroupChat(String name);
+
+  public native int createBroadcastList();
+
+  public native boolean isContactInChat(int chat_id, int contact_id);
+
+  public native int addContactToChat(int chat_id, int contact_id);
+
+  public native int removeContactFromChat(int chat_id, int contact_id);
+
+  public native void setDraft(int chat_id, DcMsg msg /*null=delete*/);
+
+  public DcMsg getDraft(int chat_id) {
+    return new DcMsg(getDraftCPtr(chat_id));
+  }
+
+  public native int setChatName(int chat_id, String name);
+
+  public native int setChatProfileImage(int chat_id, String name);
+
+  public native int[] getChatMsgs(int chat_id, int flags, int marker1before);
+
+  public native int[] searchMsgs(int chat_id, String query);
+
+  public native int[] getFreshMsgs();
+
+  public native int[] getChatMedia(int chat_id, int type1, int type2, int type3);
+
+  public native int[] getChatContacts(int chat_id);
+
+  public native int getChatEphemeralTimer(int chat_id);
+
+  public native boolean setChatEphemeralTimer(int chat_id, int timer);
+
+  public native boolean setChatMuteDuration(int chat_id, long duration);
+
+  public native void deleteChat(int chat_id);
+
+  public native void blockChat(int chat_id);
+
+  public native void acceptChat(int chat_id);
+
+  public DcMsg getMsg(int msg_id) {
+    return new DcMsg(getMsgCPtr(msg_id));
+  }
+
+  public native void sendEditRequest(int msg_id, String text);
+
+  public native String getMsgInfo(int id);
+
+  public native String getMsgHtml(int msg_id);
+
+  public native void downloadFullMsg(int msg_id);
+
+  public native int getFreshMsgCount(int chat_id);
+
+  public native int estimateDeletionCount(boolean from_server, long seconds);
+
+  public native void deleteMsgs(int msg_ids[]);
+
+  public native void sendDeleteRequest(int msg_ids[]);
+
+  public native void forwardMsgs(int msg_ids[], int chat_id);
+
+  public native void saveMsgs(int msg_ids[]);
+
+  public native boolean resendMsgs(int msg_ids[]);
+
+  public native int sendMsg(int chat_id, DcMsg msg);
+
+  public native int sendTextMsg(int chat_id, String text);
+
+  public native boolean sendWebxdcStatusUpdate(int msg_id, String payload);
+
+  public native String getWebxdcStatusUpdates(int msg_id, int last_known_serial);
+
+  public native void setWebxdcIntegration(String file);
+
+  public native int initWebxdcIntegration(int chat_id);
+
+  public native int addDeviceMsg(String label, DcMsg msg);
+
+  public native boolean wasDeviceMsgEverAdded(String label);
+
+  public DcLot checkQr(String qr) {
+    return new DcLot(checkQrCPtr(qr));
+  }
+
+  public native String getSecurejoinQr(int chat_id);
+
+  public native String getSecurejoinQrSvg(int chat_id);
+
+  public native String createQrSvg(String payload);
+
+  public native int joinSecurejoin(String qr);
+
+  public native void sendLocationsToChat(int chat_id, int seconds);
+
+  public native boolean isSendingLocationsToChat(int chat_id);
+
+  public DcProvider getProviderFromEmailWithDns(String email) {
+    long cptr = getProviderFromEmailWithDnsCPtr(email);
+    return cptr != 0 ? new DcProvider(cptr) : null;
+  }
+
+  public boolean isEnabled() {
+    return !"0".equals(getConfig(CONFIG_ACCOUNT_ENABLED));
+  }
+
+  public void setEnabled(boolean enabled) {
+    setConfigInt(CONFIG_ACCOUNT_ENABLED, enabled ? 1 : 0);
+    if (enabled) {
       startIo();
+    } else {
+      stopIo();
     }
+  }
 
-    /**
-     * @return true if at least one chat has location streaming enabled
-     */
-    public native boolean      setLocation          (float latitude, float longitude, float accuracy);
+  public boolean isMentionsEnabled() {
+    return getConfigInt(CONFIG_MUTE_MENTIONS_IF_MUTED) != 1;
+  }
 
-    // working with raw c-data
-    private long        contextCPtr;     // CAVE: the name is referenced in the JNI
-    private native long createContextCPtr(String osName, String dbfile);
-    private native void unrefContextCPtr ();
-    private native long getEventEmitterCPtr();
-    public  native long createMsgCPtr    (int viewtype);
-    private native long getChatlistCPtr  (int listflags, String query, int queryId);
-    private native long getChatCPtr      (int chat_id);
-    private native long getMsgCPtr       (int id);
-    private native long getDraftCPtr    (int id);
-    private native long getContactCPtr   (int id);
-    private native long checkQrCPtr      (String qr);
-    private native long getProviderFromEmailWithDnsCPtr  (String addr);
-    private native long newBackupProviderCPtr();
+  public void setMentionsEnabled(boolean enabled) {
+    setConfigInt(CONFIG_MUTE_MENTIONS_IF_MUTED, enabled ? 0 : 1);
+  }
+
+  public String getName() {
+    String displayname = getConfig("displayname");
+    if (displayname.isEmpty()) {
+      displayname = getConfig("addr");
+    }
+    return displayname;
+  }
+
+  public boolean isMuted() {
+    return getConfigInt("is_muted") == 1;
+  }
+
+  public void setMuted(boolean muted) {
+    setConfigInt("is_muted", muted ? 1 : 0);
+  }
+
+  public void restartIo() {
+    if (!isEnabled()) return;
+    stopIo();
+    startIo();
+  }
+
+  /**
+   * @return true if at least one chat has location streaming enabled
+   */
+  public native boolean setLocation(float latitude, float longitude, float accuracy);
+
+  // working with raw c-data
+  private long contextCPtr; // CAVE: the name is referenced in the JNI
+
+  private native long createContextCPtr(String osName, String dbfile);
+
+  private native void unrefContextCPtr();
+
+  private native long getEventEmitterCPtr();
+
+  public native long createMsgCPtr(int viewtype);
+
+  private native long getChatlistCPtr(int listflags, String query, int queryId);
+
+  private native long getChatCPtr(int chat_id);
+
+  private native long getMsgCPtr(int id);
+
+  private native long getDraftCPtr(int id);
+
+  private native long getContactCPtr(int id);
+
+  private native long checkQrCPtr(String qr);
+
+  private native long getProviderFromEmailWithDnsCPtr(String addr);
+
+  private native long newBackupProviderCPtr();
 }

src/main/java/com/b44t/messenger/DcEvent.java

@@ -2,24 +2,31 @@ package com.b44t.messenger;
 
 public class DcEvent {
 
-    public DcEvent(long eventCPtr) {
-        this.eventCPtr = eventCPtr;
-    }
+  public DcEvent(long eventCPtr) {
+    this.eventCPtr = eventCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefEventCPtr();
-        eventCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefEventCPtr();
+    eventCPtr = 0;
+  }
 
-    public native int    getId       ();
-    public native int    getData1Int ();
-    public native int    getData2Int ();
-    public native String getData2Str ();
-    public native byte[] getData2Blob();
-    public native int    getAccountId();
+  public native int getId();
 
-    // working with raw c-data
-    private long        eventCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefEventCPtr();
+  public native int getData1Int();
+
+  public native int getData2Int();
+
+  public native String getData2Str();
+
+  public native byte[] getData2Blob();
+
+  public native int getAccountId();
+
+  // working with raw c-data
+  private long eventCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefEventCPtr();
 }

src/main/java/com/b44t/messenger/DcEventChannel.java

@@ -0,0 +1,30 @@
+package com.b44t.messenger;
+
+public class DcEventChannel {
+
+  public DcEventChannel() {
+    eventChannelCPtr = createEventChannelCPtr();
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    if (eventChannelCPtr != 0) {
+      unrefEventChannelCPtr();
+      eventChannelCPtr = 0;
+    }
+  }
+
+  public DcEventEmitter getEventEmitter() {
+    return new DcEventEmitter(getEventEmitterCPtr());
+  }
+
+  // working with raw c-data
+  private long eventChannelCPtr; // CAVE: the name is referenced in the JNI
+
+  private native long createEventChannelCPtr();
+
+  private native void unrefEventChannelCPtr();
+
+  private native long getEventEmitterCPtr();
+}

src/main/java/com/b44t/messenger/DcEventEmitter.java

@@ -2,23 +2,26 @@ package com.b44t.messenger;
 
 public class DcEventEmitter {
 
-    public DcEventEmitter(long eventEmitterCPtr) {
-        this.eventEmitterCPtr = eventEmitterCPtr;
-    }
+  public DcEventEmitter(long eventEmitterCPtr) {
+    this.eventEmitterCPtr = eventEmitterCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefEventEmitterCPtr();
-        eventEmitterCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefEventEmitterCPtr();
+    eventEmitterCPtr = 0;
+  }
 
-    public DcEvent getNextEvent () {
-        long eventCPtr = getNextEventCPtr();
-        return eventCPtr == 0 ? null : new DcEvent(eventCPtr);
-    }
+  public DcEvent getNextEvent() {
+    long eventCPtr = getNextEventCPtr();
+    return eventCPtr == 0 ? null : new DcEvent(eventCPtr);
+  }
 
-    // working with raw c-data
-    private long        eventEmitterCPtr;    // CAVE: the name is referenced in the JNI
-    private native long getNextEventCPtr     ();
-    private native void unrefEventEmitterCPtr();
+  // working with raw c-data
+  private long eventEmitterCPtr; // CAVE: the name is referenced in the JNI
+
+  private native long getNextEventCPtr();
+
+  private native void unrefEventEmitterCPtr();
 }

src/main/java/com/b44t/messenger/DcJsonrpcInstance.java

@@ -2,20 +2,23 @@ package com.b44t.messenger;
 
 public class DcJsonrpcInstance {
 
-    public DcJsonrpcInstance(long jsonrpcInstanceCPtr) {
-        this.jsonrpcInstanceCPtr = jsonrpcInstanceCPtr;
-    }
+  public DcJsonrpcInstance(long jsonrpcInstanceCPtr) {
+    this.jsonrpcInstanceCPtr = jsonrpcInstanceCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefJsonrpcInstanceCPtr();
-        jsonrpcInstanceCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefJsonrpcInstanceCPtr();
+    jsonrpcInstanceCPtr = 0;
+  }
 
-    public native void request(String request);
-    public native String getNextResponse();
+  public native void request(String request);
 
-    // working with raw c-data
-    private long        jsonrpcInstanceCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefJsonrpcInstanceCPtr();
+  public native String getNextResponse();
+
+  // working with raw c-data
+  private long jsonrpcInstanceCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefJsonrpcInstanceCPtr();
 }

src/main/java/com/b44t/messenger/DcLot.java

@@ -2,28 +2,35 @@ package com.b44t.messenger;
 
 public class DcLot {
 
-    public final static int DC_TEXT1_DRAFT    = 1;
-    public final static int DC_TEXT1_USERNAME = 2;
-    public final static int DC_TEXT1_SELF     = 3;
+  public static final int DC_TEXT1_DRAFT = 1;
+  public static final int DC_TEXT1_USERNAME = 2;
+  public static final int DC_TEXT1_SELF = 3;
 
-    public DcLot(long lotCPtr) {
-        this.lotCPtr = lotCPtr;
-    }
+  public DcLot(long lotCPtr) {
+    this.lotCPtr = lotCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefLotCPtr();
-        lotCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefLotCPtr();
+    lotCPtr = 0;
+  }
 
-    public native String getText1       ();
-    public native int    getText1Meaning();
-    public native String getText2       ();
-    public native long   getTimestamp   ();
-    public native int    getState       ();
-    public native int    getId          ();
+  public native String getText1();
 
-    // working with raw c-data
-    private long        lotCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefLotCPtr();
+  public native int getText1Meaning();
+
+  public native String getText2();
+
+  public native long getTimestamp();
+
+  public native int getState();
+
+  public native int getId();
+
+  // working with raw c-data
+  private long lotCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefLotCPtr();
 }

src/main/java/com/b44t/messenger/DcMediaGalleryElement.java

@@ -1,14 +1,14 @@
 package com.b44t.messenger;
 
-/**
- * Contains a list of media entries, their respective positions and ability to move through it.
- */
+/** Contains a list of media entries, their respective positions and ability to move through it. */
 public class DcMediaGalleryElement {
 
   final int[] mediaMsgs;
   int position;
   final DcContext context;
-  public DcMediaGalleryElement(int[] mediaMsgs, int position, DcContext context, boolean leftIsRecent) {
+
+  public DcMediaGalleryElement(
+      int[] mediaMsgs, int position, DcContext context, boolean leftIsRecent) {
     this.mediaMsgs = mediaMsgs;
     this.position = position;
     this.context = context;
@@ -33,7 +33,7 @@ public class DcMediaGalleryElement {
   }
 
   public void moveToPosition(int newPosition) {
-    if(newPosition < 0 || newPosition >= mediaMsgs.length)
+    if (newPosition < 0 || newPosition >= mediaMsgs.length)
       throw new IllegalArgumentException("can't move outside of known area.");
     position = newPosition;
   }

src/main/java/com/b44t/messenger/DcMsg.java

@@ -1,266 +1,325 @@
 package com.b44t.messenger;
 
 import android.text.TextUtils;
-
-import org.json.JSONObject;
-
 import java.io.File;
 import java.util.Set;
+import org.json.JSONObject;
 
 public class DcMsg {
 
-    public final static int DC_MSG_UNDEFINED = 0;
-    public final static int DC_MSG_TEXT = 10;
-    public final static int DC_MSG_IMAGE = 20;
-    public final static int DC_MSG_GIF = 21;
-    public final static int DC_MSG_STICKER = 23;
-    public final static int DC_MSG_AUDIO = 40;
-    public final static int DC_MSG_VOICE = 41;
-    public final static int DC_MSG_VIDEO = 50;
-    public final static int DC_MSG_FILE = 60;
-    public final static int DC_MSG_CALL = 71;
-    public final static int DC_MSG_WEBXDC = 80;
-    public final static int DC_MSG_VCARD = 90;
+  public static final int DC_MSG_UNDEFINED = 0;
+  public static final int DC_MSG_TEXT = 10;
+  public static final int DC_MSG_IMAGE = 20;
+  public static final int DC_MSG_GIF = 21;
+  public static final int DC_MSG_STICKER = 23;
+  public static final int DC_MSG_AUDIO = 40;
+  public static final int DC_MSG_VOICE = 41;
+  public static final int DC_MSG_VIDEO = 50;
+  public static final int DC_MSG_FILE = 60;
+  public static final int DC_MSG_CALL = 71;
+  public static final int DC_MSG_WEBXDC = 80;
+  public static final int DC_MSG_VCARD = 90;
 
-    public final static int DC_INFO_UNKNOWN                   = 0;
-    public final static int DC_INFO_GROUP_NAME_CHANGED        = 2;
-    public final static int DC_INFO_GROUP_IMAGE_CHANGED       = 3;
-    public final static int DC_INFO_MEMBER_ADDED_TO_GROUP     = 4;
-    public final static int DC_INFO_MEMBER_REMOVED_FROM_GROUP = 5;
-    public final static int DC_INFO_AUTOCRYPT_SETUP_MESSAGE   = 6;
-    public final static int DC_INFO_SECURE_JOIN_MESSAGE       = 7;
-    public final static int DC_INFO_LOCATIONSTREAMING_ENABLED = 8;
-    public final static int DC_INFO_LOCATION_ONLY             = 9;
-    public final static int DC_INFO_EPHEMERAL_TIMER_CHANGED   = 10;
-    public final static int DC_INFO_PROTECTION_ENABLED        = 11;
-    public final static int DC_INFO_INVALID_UNENCRYPTED_MAIL  = 13;
-    public final static int DC_INFO_WEBXDC_INFO_MESSAGE       = 32;
-    public final static int DC_INFO_CHAT_E2EE                 = 50;
+  public static final int DC_INFO_UNKNOWN = 0;
+  public static final int DC_INFO_GROUP_NAME_CHANGED = 2;
+  public static final int DC_INFO_GROUP_IMAGE_CHANGED = 3;
+  public static final int DC_INFO_MEMBER_ADDED_TO_GROUP = 4;
+  public static final int DC_INFO_MEMBER_REMOVED_FROM_GROUP = 5;
+  public static final int DC_INFO_SECURE_JOIN_MESSAGE = 7;
+  public static final int DC_INFO_LOCATIONSTREAMING_ENABLED = 8;
+  public static final int DC_INFO_LOCATION_ONLY = 9;
+  public static final int DC_INFO_EPHEMERAL_TIMER_CHANGED = 10;
+  public static final int DC_INFO_PROTECTION_ENABLED = 11;
+  public static final int DC_INFO_INVALID_UNENCRYPTED_MAIL = 13;
+  public static final int DC_INFO_WEBXDC_INFO_MESSAGE = 32;
+  public static final int DC_INFO_CHAT_E2EE = 50;
+  public static final int DC_INFO_CHAT_DESCRIPTION_CHANGED = 70;
 
-    public final static int DC_STATE_UNDEFINED =  0;
-    public final static int DC_STATE_IN_FRESH = 10;
-    public final static int DC_STATE_IN_NOTICED = 13;
-    public final static int DC_STATE_IN_SEEN = 16;
-    public final static int DC_STATE_OUT_PREPARING = 18;
-    public final static int DC_STATE_OUT_DRAFT = 19;
-    public final static int DC_STATE_OUT_PENDING = 20;
-    public final static int DC_STATE_OUT_FAILED = 24;
-    public final static int DC_STATE_OUT_DELIVERED = 26;
-    public final static int DC_STATE_OUT_MDN_RCVD = 28;
+  public static final int DC_STATE_UNDEFINED = 0;
+  public static final int DC_STATE_IN_FRESH = 10;
+  public static final int DC_STATE_IN_NOTICED = 13;
+  public static final int DC_STATE_IN_SEEN = 16;
+  public static final int DC_STATE_OUT_PREPARING = 18;
+  public static final int DC_STATE_OUT_DRAFT = 19;
+  public static final int DC_STATE_OUT_PENDING = 20;
+  public static final int DC_STATE_OUT_FAILED = 24;
+  public static final int DC_STATE_OUT_DELIVERED = 26;
+  public static final int DC_STATE_OUT_MDN_RCVD = 28;
 
-    public final static int DC_DOWNLOAD_DONE = 0;
-    public final static int DC_DOWNLOAD_AVAILABLE = 10;
-    public final static int DC_DOWNLOAD_FAILURE = 20;
-    public final static int DC_DOWNLOAD_UNDECIPHERABLE = 30;
-    public final static int DC_DOWNLOAD_IN_PROGRESS = 1000;
+  public static final int DC_DOWNLOAD_DONE = 0;
+  public static final int DC_DOWNLOAD_AVAILABLE = 10;
+  public static final int DC_DOWNLOAD_FAILURE = 20;
+  public static final int DC_DOWNLOAD_UNDECIPHERABLE = 30;
+  public static final int DC_DOWNLOAD_IN_PROGRESS = 1000;
 
-    public static final int DC_MSG_NO_ID = 0;
-    public final static int DC_MSG_ID_MARKER1 = 1;
-    public final static int DC_MSG_ID_DAYMARKER = 9;
+  public static final int DC_MSG_NO_ID = 0;
+  public static final int DC_MSG_ID_MARKER1 = 1;
+  public static final int DC_MSG_ID_DAYMARKER = 9;
 
-    public final static int DC_VIDEOCHATTYPE_UNKNOWN = 0;
-    public final static int DC_VIDEOCHATTYPE_BASICWEBRTC = 1;
+  public static final int DC_VIDEOCHATTYPE_UNKNOWN = 0;
+  public static final int DC_VIDEOCHATTYPE_BASICWEBRTC = 1;
 
-    private static final String TAG = DcMsg.class.getSimpleName();
+  public DcMsg(DcContext context, int viewtype) {
+    msgCPtr = context.createMsgCPtr(viewtype);
+  }
 
-    public DcMsg(DcContext context, int viewtype) {
-        msgCPtr = context.createMsgCPtr(viewtype);
+  public DcMsg(long msgCPtr) {
+    this.msgCPtr = msgCPtr;
+  }
+
+  public boolean isOk() {
+    return msgCPtr != 0;
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefMsgCPtr();
+    msgCPtr = 0;
+  }
+
+  @Override
+  public int hashCode() {
+    return this.getId();
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null || !(other instanceof DcMsg)) {
+      return false;
     }
 
-    public DcMsg(long msgCPtr) {
-        this.msgCPtr = msgCPtr;
-    }
+    DcMsg that = (DcMsg) other;
+    return this.getId() == that.getId() && this.getId() != 0;
+  }
 
-    public boolean isOk() {
-      return msgCPtr != 0;
-    }
-
-    @Override
-    protected void finalize() throws Throwable {
-        super.finalize();
-        unrefMsgCPtr();
-        msgCPtr = 0;
-    }
-
-    @Override
-    public int hashCode() {
-        return this.getId();
-    }
-
-    @Override
-    public boolean equals(Object other) {
-        if (other == null || !(other instanceof DcMsg)) {
-            return false;
-        }
-
-        DcMsg that = (DcMsg) other;
-        return this.getId()==that.getId() && this.getId()!=0;
-    }
-
-    /**
-     * If given a message, calculates the position of the message in the chat
-     */
-    public static int getMessagePosition(DcMsg msg, DcContext dcContext) {
-        int msgs[] = dcContext.getChatMsgs(msg.getChatId(), 0, 0);
-        int startingPosition = -1;
-        int msgId = msg.getId();
-        for (int i = 0; i < msgs.length; i++) {
-            if (msgs[i] == msgId) {
-                startingPosition = msgs.length - 1 - i;
-                break;
-            }
-        }
-        return startingPosition;
-    }
-
-    public native int     getId              ();
-    public native String  getText            ();
-    public native String  getSubject         ();
-    public native long    getTimestamp       ();
-    public native long    getSortTimestamp   ();
-    public native boolean hasDeviatingTimestamp();
-    public native boolean hasLocation        ();
-    private native int    getViewType        ();
-    public int            getType            () { return getDownloadState()==DC_DOWNLOAD_DONE? getViewType() : DC_MSG_TEXT; }
-    public native int     getInfoType        ();
-    public native int     getInfoContactId   ();
-    public native int     getState           ();
-    public native int     getDownloadState   ();
-    public native int     getChatId          ();
-    public native int     getFromId          ();
-    public native int     getWidth           (int def);
-    public native int     getHeight          (int def);
-    public native int     getDuration        ();
-    public native void    lateFilingMediaSize(int width, int height, int duration);
-    public DcLot          getSummary         (DcChat chat) { return new DcLot(getSummaryCPtr(chat.getChatCPtr())); }
-    public native String  getSummarytext     (int approx_characters);
-    public native int     showPadlock        ();
-    public boolean        hasFile            () { String file = getFile(); return file!=null && !file.isEmpty(); }
-    public native String  getFile            ();
-    public native String  getFilemime        ();
-    public native String  getFilename        ();
-    public native long    getFilebytes       ();
-    public native byte[]  getWebxdcBlob      (String filename);
-    public JSONObject     getWebxdcInfo      () {
-      try {
-        String json = getWebxdcInfoJson();
-        if (json != null && !json.isEmpty()) return new JSONObject(json);
-      } catch(Exception e) {
-        e.printStackTrace();
+  /** If given a message, calculates the position of the message in the chat */
+  public static int getMessagePosition(DcMsg msg, DcContext dcContext) {
+    int msgs[] = dcContext.getChatMsgs(msg.getChatId(), 0, 0);
+    int startingPosition = -1;
+    int msgId = msg.getId();
+    for (int i = 0; i < msgs.length; i++) {
+      if (msgs[i] == msgId) {
+        startingPosition = msgs.length - 1 - i;
+        break;
       }
-      return new JSONObject();
     }
-    public native String  getWebxdcHref      ();
-    public native boolean isForwarded        ();
-    public native boolean isInfo             ();
-    public native boolean hasHtml            ();
-    public native String  getSetupCodeBegin  ();
-    public native void    setText            (String text);
-    public native void    setSubject         (String text);
-    public native void    setHtml            (String text);
-    public native void    forceSticker       ();
-    public native void    setFileAndDeduplicate(String file, String name, String filemime);
-    public native void    setDimension       (int width, int height);
-    public native void    setDuration        (int duration);
-    public native void    setLocation        (float latitude, float longitude);
-    public native String  getPOILocation     ();
-    public void           setQuote           (DcMsg quote) { setQuoteCPtr(quote.msgCPtr); }
-    public native String  getQuotedText      ();
-    public native String  getError           ();
-    public native String  getOverrideSenderName();
-    public native boolean isEdited           ();
+    return startingPosition;
+  }
 
-    public String getSenderName(DcContact dcContact) {
-        String overrideName = getOverrideSenderName();
-        if (overrideName != null) {
-            return "~" + overrideName;
-        } else {
-            return dcContact.getDisplayName();
-        }
-    }
+  public native int getId();
 
-    public DcMsg          getQuotedMsg       () {
-        long cPtr = getQuotedMsgCPtr();
-        return cPtr != 0 ? new DcMsg(cPtr) : null;
-    }
+  public native String getText();
 
-    public DcMsg getParent() {
-      long cPtr = getParentCPtr();
-      return cPtr != 0 ? new DcMsg(cPtr) : null;
-    }
+  public native String getSubject();
 
-    public native int getOriginalMsgId  ();
-    public native int getSavedMsgId     ();
+  public native long getTimestamp();
 
-    public boolean canSave() {
-      // saving info-messages out of context results in confusion, see https://github.com/deltachat/deltachat-ios/issues/2567
-      return !isInfo();
-    }
+  public native long getSortTimestamp();
 
-    public File getFileAsFile() {
-        if(getFile()==null)
-            throw new AssertionError("expected a file to be present.");
-        return new File(getFile());
-    }
+  public native boolean hasDeviatingTimestamp();
 
-    // aliases and higher-level tools
-    public static int[] msgSetToIds(final Set<DcMsg> dcMsgs) {
-        if (dcMsgs == null) {
-            return new int[0];
-        }
-        int[] ids = new int[dcMsgs.size()];
-        int   i = 0;
-        for (DcMsg dcMsg : dcMsgs) {
-            ids[i++] = dcMsg.getId();
-        }
-        return ids;
-    }
+  public native boolean hasLocation();
 
-    public boolean isOutgoing() {
-        return getFromId() == DcContact.DC_CONTACT_ID_SELF;
-    }
+  private native int getViewType();
 
-    public String getDisplayBody()  {
-        return getText();
-    }
+  public int getType() {
+    return getDownloadState() == DC_DOWNLOAD_DONE ? getViewType() : DC_MSG_TEXT;
+  }
 
-    public String getBody()  {
-        return getText();
-    }
+  public native int getInfoType();
 
-    public long getDateReceived() {
-        return getTimestamp();
-    }
+  public native int getInfoContactId();
 
-    public boolean isFailed() {
-        return (getState() == DC_STATE_OUT_FAILED) || (!TextUtils.isEmpty(getError()));
-    }
-    public boolean isPreparing() {
-        return getState() == DC_STATE_OUT_PREPARING;
-    }
-    public boolean isSecure() {
-        return showPadlock()!=0;
-    }
-    public boolean isPending() {
-        return getState() == DC_STATE_OUT_PENDING;
-    }
-    public boolean isDelivered() {
-        return getState() == DC_STATE_OUT_DELIVERED;
-    }
-    public boolean isRemoteRead() {
-        return getState() == DC_STATE_OUT_MDN_RCVD;
-    }
-    public boolean isSeen() {
-        return getState() == DC_STATE_IN_SEEN;
-    }
+  public native int getState();
 
+  public native int getDownloadState();
 
-    // working with raw c-data
-    private long        msgCPtr;        // CAVE: the name is referenced in the JNI
-    private native void unrefMsgCPtr    ();
-    private native long getSummaryCPtr  (long chatCPtr);
-    private native void setQuoteCPtr    (long quoteCPtr);
-    private native long getQuotedMsgCPtr ();
-    private native long getParentCPtr   ();
-    private native String getWebxdcInfoJson ();
-};
+  public native int getChatId();
+
+  public native int getFromId();
+
+  public native int getWidth(int def);
+
+  public native int getHeight(int def);
+
+  public native int getDuration();
+
+  public native void lateFilingMediaSize(int width, int height, int duration);
+
+  public DcLot getSummary(DcChat chat) {
+    return new DcLot(getSummaryCPtr(chat.getChatCPtr()));
+  }
+
+  public native String getSummarytext(int approx_characters);
+
+  public native int showPadlock();
+
+  public boolean hasFile() {
+    String file = getFile();
+    return file != null && !file.isEmpty();
+  }
+
+  public native String getFile();
+
+  public native String getFilemime();
+
+  public native String getFilename();
+
+  public native long getFilebytes();
+
+  public native byte[] getWebxdcBlob(String filename);
+
+  public JSONObject getWebxdcInfo() {
+    try {
+      String json = getWebxdcInfoJson();
+      if (json != null && !json.isEmpty()) return new JSONObject(json);
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+    return new JSONObject();
+  }
+
+  public native String getWebxdcHref();
+
+  public native boolean isForwarded();
+
+  public native boolean isInfo();
+
+  public native boolean hasHtml();
+
+  public native void setText(String text);
+
+  public native void setSubject(String text);
+
+  public native void setHtml(String text);
+
+  public native void setFileAndDeduplicate(String file, String name, String filemime);
+
+  public native void setDimension(int width, int height);
+
+  public native void setDuration(int duration);
+
+  public native void setLocation(float latitude, float longitude);
+
+  public native String getPOILocation();
+
+  public void setQuote(DcMsg quote) {
+    setQuoteCPtr(quote.msgCPtr);
+  }
+
+  public native String getQuotedText();
+
+  public native String getError();
+
+  public native String getOverrideSenderName();
+
+  public native boolean isEdited();
+
+  public String getSenderName(DcContact dcContact) {
+    String overrideName = getOverrideSenderName();
+    if (overrideName != null) {
+      return "~" + overrideName;
+    } else {
+      return dcContact.getDisplayName();
+    }
+  }
+
+  public DcMsg getQuotedMsg() {
+    long cPtr = getQuotedMsgCPtr();
+    return cPtr != 0 ? new DcMsg(cPtr) : null;
+  }
+
+  public DcMsg getParent() {
+    long cPtr = getParentCPtr();
+    return cPtr != 0 ? new DcMsg(cPtr) : null;
+  }
+
+  public native int getOriginalMsgId();
+
+  public native int getSavedMsgId();
+
+  public boolean canSave() {
+    // saving info-messages out of context results in confusion, see
+    // https://github.com/deltachat/deltachat-ios/issues/2567
+    return !isInfo();
+  }
+
+  public File getFileAsFile() {
+    if (getFile() == null) throw new AssertionError("expected a file to be present.");
+    return new File(getFile());
+  }
+
+  // aliases and higher-level tools
+  public static int[] msgSetToIds(final Set<DcMsg> dcMsgs) {
+    if (dcMsgs == null) {
+      return new int[0];
+    }
+    int[] ids = new int[dcMsgs.size()];
+    int i = 0;
+    for (DcMsg dcMsg : dcMsgs) {
+      ids[i++] = dcMsg.getId();
+    }
+    return ids;
+  }
+
+  public boolean isOutgoing() {
+    return getFromId() == DcContact.DC_CONTACT_ID_SELF;
+  }
+
+  public String getDisplayBody() {
+    return getText();
+  }
+
+  public String getBody() {
+    return getText();
+  }
+
+  public long getDateReceived() {
+    return getTimestamp();
+  }
+
+  public boolean isFailed() {
+    return (getState() == DC_STATE_OUT_FAILED) || (!TextUtils.isEmpty(getError()));
+  }
+
+  public boolean isPreparing() {
+    return getState() == DC_STATE_OUT_PREPARING;
+  }
+
+  public boolean isSecure() {
+    return showPadlock() != 0;
+  }
+
+  public boolean isPending() {
+    return getState() == DC_STATE_OUT_PENDING;
+  }
+
+  public boolean isDelivered() {
+    return getState() == DC_STATE_OUT_DELIVERED;
+  }
+
+  public boolean isRemoteRead() {
+    return getState() == DC_STATE_OUT_MDN_RCVD;
+  }
+
+  public boolean isSeen() {
+    return getState() == DC_STATE_IN_SEEN;
+  }
+
+  // working with raw c-data
+  private long msgCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefMsgCPtr();
+
+  private native long getSummaryCPtr(long chatCPtr);
+
+  private native void setQuoteCPtr(long quoteCPtr);
+
+  private native long getQuotedMsgCPtr();
+
+  private native long getParentCPtr();
+
+  private native String getWebxdcInfoJson();
+}
+;

src/main/java/com/b44t/messenger/DcProvider.java

@@ -2,25 +2,29 @@ package com.b44t.messenger;
 
 public class DcProvider {
 
-    public final static int DC_PROVIDER_STATUS_OK          = 1;
-    public final static int DC_PROVIDER_STATUS_PREPARATION = 2;
-    public final static int DC_PROVIDER_STATUS_BROKEN      = 3;
+  public static final int DC_PROVIDER_STATUS_OK = 1;
+  public static final int DC_PROVIDER_STATUS_PREPARATION = 2;
+  public static final int DC_PROVIDER_STATUS_BROKEN = 3;
 
-    public DcProvider(long providerCPtr) {
-        this.providerCPtr = providerCPtr;
-    }
+  public DcProvider(long providerCPtr) {
+    this.providerCPtr = providerCPtr;
+  }
 
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-        unrefProviderCPtr();
-        providerCPtr = 0;
-    }
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    unrefProviderCPtr();
+    providerCPtr = 0;
+  }
 
-    public native int       getStatus          ();
-    public native String    getBeforeLoginHint ();
-    public native String    getOverviewPage    ();
+  public native int getStatus();
 
-    // working with raw c-data
-    private long        providerCPtr;    // CAVE: the name is referenced in the JNI
-    private native void unrefProviderCPtr();
+  public native String getBeforeLoginHint();
+
+  public native String getOverviewPage();
+
+  // working with raw c-data
+  private long providerCPtr; // CAVE: the name is referenced in the JNI
+
+  private native void unrefProviderCPtr();
 }

src/main/java/com/b44t/messenger/FFITransport.java

@@ -1,9 +1,9 @@
 package com.b44t.messenger;
 
-import chat.delta.rpc.BaseTransport;
+import chat.delta.rpc.BaseRpcTransport;
 
 /* RPC transport over C FFI */
-public class FFITransport extends BaseTransport {
+public class FFITransport extends BaseRpcTransport {
   private final DcJsonrpcInstance dcJsonrpcInstance;
 
   public FFITransport(DcJsonrpcInstance dcJsonrpcInstance) {
@@ -19,4 +19,4 @@ public class FFITransport extends BaseTransport {
   protected String getResponse() {
     return dcJsonrpcInstance.getNextResponse();
   }
-}
+}

src/main/java/org/thoughtcrime/securesms/AllMediaActivity.java

@@ -1,61 +1,73 @@
 package org.thoughtcrime.securesms;
 
+import android.content.ComponentName;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.MenuItem;
-import android.view.ViewGroup;
-
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.view.ActionMode;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentStatePagerAdapter;
-import androidx.viewpager.widget.ViewPager;
-
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.media3.session.MediaController;
+import androidx.media3.session.SessionCommand;
+import androidx.media3.session.SessionToken;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+import androidx.viewpager2.widget.ViewPager2;
 import com.b44t.messenger.DcChat;
 import com.b44t.messenger.DcContext;
 import com.b44t.messenger.DcEvent;
 import com.b44t.messenger.DcMsg;
 import com.google.android.material.tabs.TabLayout;
-
+import com.google.android.material.tabs.TabLayoutMediator;
+import com.google.common.util.concurrent.ListenableFuture;
+import java.util.ArrayList;
+import org.thoughtcrime.securesms.components.audioplay.AudioPlaybackViewModel;
+import org.thoughtcrime.securesms.components.audioplay.ChatAudioQueueProvider;
 import org.thoughtcrime.securesms.connect.DcEventCenter;
 import org.thoughtcrime.securesms.connect.DcHelper;
+import org.thoughtcrime.securesms.service.AudioPlaybackService;
 import org.thoughtcrime.securesms.util.DynamicNoActionBarTheme;
-import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
 
-import java.util.ArrayList;
-
 public class AllMediaActivity extends PassphraseRequiredActionBarActivity
-                             implements DcEventCenter.DcEventDelegate
-{
+    implements DcEventCenter.DcEventDelegate {
+  private static final String TAG = "AllMediaActivity";
 
-  public static final String CHAT_ID_EXTRA    = "chat_id";
+  public static final String CHAT_ID_EXTRA = "chat_id";
   public static final String CONTACT_ID_EXTRA = "contact_id";
-  public static final String FORCE_GALLERY    = "force_gallery";
+  public static final String FORCE_GALLERY = "force_gallery";
 
   static class TabData {
     final int title;
     final int type1;
     final int type2;
     final int type3;
+
     TabData(int title, int type1, int type2, int type3) {
       this.title = title;
       this.type1 = type1;
       this.type2 = type2;
       this.type3 = type3;
     }
-  };
+  }
 
-  private DcContext            dcContext;
-  private int                  chatId;
-  private int                  contactId;
+  private DcContext dcContext;
+  private int chatId;
+  private int contactId;
 
   private final ArrayList<TabData> tabs = new ArrayList<>();
-  private Toolbar            toolbar;
-  private TabLayout          tabLayout;
-  private ViewPager          viewPager;
+  private Toolbar toolbar;
+  private TabLayout tabLayout;
+  private ViewPager2 viewPager;
+
+  private @Nullable MediaController mediaController;
+  private ListenableFuture<MediaController> mediaControllerFuture;
+  private AudioPlaybackViewModel playbackViewModel;
 
   @Override
   protected void onPreCreate() {
@@ -67,7 +79,9 @@ public class AllMediaActivity extends PassphraseRequiredActionBarActivity
   @Override
   protected void onCreate(Bundle bundle, boolean ready) {
     tabs.add(new TabData(R.string.webxdc_apps, DcMsg.DC_MSG_WEBXDC, 0, 0));
-    tabs.add(new TabData(R.string.tab_gallery, DcMsg.DC_MSG_IMAGE, DcMsg.DC_MSG_GIF, DcMsg.DC_MSG_VIDEO));
+    tabs.add(
+        new TabData(
+            R.string.tab_gallery, DcMsg.DC_MSG_IMAGE, DcMsg.DC_MSG_GIF, DcMsg.DC_MSG_VIDEO));
     tabs.add(new TabData(R.string.audio, DcMsg.DC_MSG_AUDIO, DcMsg.DC_MSG_VOICE, 0));
     tabs.add(new TabData(R.string.files, DcMsg.DC_MSG_FILE, 0, 0));
 
@@ -79,11 +93,24 @@ public class AllMediaActivity extends PassphraseRequiredActionBarActivity
     ActionBar supportActionBar = getSupportActionBar();
     if (supportActionBar != null) {
       supportActionBar.setDisplayHomeAsUpEnabled(true);
-      supportActionBar.setTitle(isGlobalGallery() ? R.string.menu_all_media : R.string.apps_and_media);
+      supportActionBar.setTitle(
+          isGlobalGallery() ? R.string.menu_all_media : R.string.apps_and_media);
     }
 
-    this.tabLayout.setupWithViewPager(viewPager);
-    this.viewPager.setAdapter(new AllMediaPagerAdapter(getSupportFragmentManager()));
+    AllMediaPagerAdapter adapter = new AllMediaPagerAdapter(this);
+    this.viewPager.setAdapter(adapter);
+    this.viewPager.registerOnPageChangeCallback(
+        new ViewPager2.OnPageChangeCallback() {
+          @Override
+          public void onPageSelected(int position) {
+            adapter.onPageChanged(position);
+          }
+        });
+    new TabLayoutMediator(
+            this.tabLayout,
+            this.viewPager,
+            (tab, position) -> tab.setText(getString(tabs.get(position).title)))
+        .attach();
     if (getIntent().getBooleanExtra(FORCE_GALLERY, false)) {
       this.viewPager.setCurrentItem(1, false);
     }
@@ -91,78 +118,109 @@ public class AllMediaActivity extends PassphraseRequiredActionBarActivity
     DcEventCenter eventCenter = DcHelper.getEventCenter(this);
     eventCenter.addObserver(DcContext.DC_EVENT_CHAT_MODIFIED, this);
     eventCenter.addObserver(DcContext.DC_EVENT_CONTACTS_CHANGED, this);
+
+    int accountId = DcHelper.getAccounts(this).getSelectedAccount().getAccountId();
+    playbackViewModel = new ViewModelProvider(this).get(AudioPlaybackViewModel.class);
+    playbackViewModel.setQueueProvider(new ChatAudioQueueProvider(this, chatId, accountId));
+    initializeMediaController();
   }
 
   @Override
   public void onDestroy() {
     DcHelper.getEventCenter(this).removeObservers(this);
+    if (mediaController != null) {
+      MediaController.releaseFuture(mediaControllerFuture);
+      mediaController = null;
+      playbackViewModel.setMediaController(null);
+    }
+    playbackViewModel.setQueueProvider(null);
     super.onDestroy();
   }
 
   @Override
-  public void handleEvent(@NonNull DcEvent event) {
-  }
+  public void handleEvent(@NonNull DcEvent event) {}
 
   private void initializeResources() {
-    chatId           = getIntent().getIntExtra(CHAT_ID_EXTRA, 0);
-    contactId        = getIntent().getIntExtra(CONTACT_ID_EXTRA, 0);
+    chatId = getIntent().getIntExtra(CHAT_ID_EXTRA, 0);
+    contactId = getIntent().getIntExtra(CONTACT_ID_EXTRA, 0);
 
-    if (contactId!=0) {
+    if (contactId != 0) {
       chatId = dcContext.getChatIdByContactId(contactId);
     }
 
-    if(chatId!=0) {
+    if (chatId != 0) {
       DcChat dcChat = dcContext.getChat(chatId);
-      if(!dcChat.isMultiUser()) {
+      if (!dcChat.isMultiUser()) {
         final int[] members = dcContext.getChatContacts(chatId);
-        contactId = members.length>=1? members[0] : 0;
+        contactId = members.length >= 1 ? members[0] : 0;
       }
     }
 
     this.viewPager = ViewUtil.findById(this, R.id.pager);
-    this.toolbar   = ViewUtil.findById(this, R.id.toolbar);
+    this.toolbar = ViewUtil.findById(this, R.id.toolbar);
     this.tabLayout = ViewUtil.findById(this, R.id.tab_layout);
   }
 
-  private boolean isGlobalGallery() {
-    return contactId==0 && chatId==0;
+  private void initializeMediaController() {
+    SessionToken sessionToken =
+        new SessionToken(this, new ComponentName(this, AudioPlaybackService.class));
+    mediaControllerFuture = new MediaController.Builder(this, sessionToken).buildAsync();
+    mediaControllerFuture.addListener(
+        () -> {
+          try {
+            mediaController = mediaControllerFuture.get();
+            addActivityContext(this.getIntent().getExtras(), this.getClass().getName());
+            playbackViewModel.setMediaController(mediaController);
+          } catch (Exception e) {
+            Log.e(TAG, "Error connecting to audio playback service", e);
+          }
+        },
+        ContextCompat.getMainExecutor(this));
   }
 
-  private class AllMediaPagerAdapter extends FragmentStatePagerAdapter {
-    private Object currentFragment = null;
+  private void addActivityContext(Bundle extras, String activityClassName) {
+    if (mediaController == null) return;
 
-    AllMediaPagerAdapter(FragmentManager fragmentManager) {
-      super(fragmentManager);
+    Bundle commandArgs = new Bundle();
+    commandArgs.putString("activity_class", activityClassName);
+    if (extras != null) {
+      commandArgs.putAll(extras);
     }
 
-    @Override
-    public void setPrimaryItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
-      super.setPrimaryItem(container, position, object);
-      if (currentFragment != null && currentFragment != object) {
-        ActionMode action = null;
-        if (currentFragment instanceof MessageSelectorFragment) {
-          action = ((MessageSelectorFragment) currentFragment).getActionMode();
-        }
-        if (action != null) {
-          action.finish();
-        }
-      }
-      currentFragment = object;
+    SessionCommand updateContextCommand =
+        new SessionCommand("UPDATE_ACTIVITY_CONTEXT", Bundle.EMPTY);
+
+    mediaController.sendCustomCommand(updateContextCommand, commandArgs);
+  }
+
+  private boolean isGlobalGallery() {
+    return contactId == 0 && chatId == 0;
+  }
+
+  private class AllMediaPagerAdapter extends FragmentStateAdapter {
+    private int currentPosition = -1;
+
+    AllMediaPagerAdapter(FragmentActivity activity) {
+      super(activity);
     }
 
     @NonNull
     @Override
-    public Fragment getItem(int position) {
+    public Fragment createFragment(int position) {
       TabData data = tabs.get(position);
       Fragment fragment;
       Bundle args = new Bundle();
 
       if (data.type1 == DcMsg.DC_MSG_IMAGE) {
         fragment = new AllMediaGalleryFragment();
-        args.putInt(AllMediaGalleryFragment.CHAT_ID_EXTRA, (chatId==0&&!isGlobalGallery())? -1 : chatId);
+        args.putInt(
+            AllMediaGalleryFragment.CHAT_ID_EXTRA,
+            (chatId == 0 && !isGlobalGallery()) ? -1 : chatId);
       } else {
         fragment = new AllMediaDocumentsFragment();
-        args.putInt(AllMediaDocumentsFragment.CHAT_ID_EXTRA, (chatId==0&&!isGlobalGallery())? -1 : chatId);
+        args.putInt(
+            AllMediaDocumentsFragment.CHAT_ID_EXTRA,
+            (chatId == 0 && !isGlobalGallery()) ? -1 : chatId);
         args.putInt(AllMediaDocumentsFragment.VIEWTYPE1, data.type1);
         args.putInt(AllMediaDocumentsFragment.VIEWTYPE2, data.type2);
       }
@@ -171,13 +229,24 @@ public class AllMediaActivity extends PassphraseRequiredActionBarActivity
     }
 
     @Override
-    public int getCount() {
+    public int getItemCount() {
       return tabs.size();
     }
 
-    @Override
-    public CharSequence getPageTitle(int position) {
-      return getString(tabs.get(position).title);
+    private void onPageChanged(int newPosition) {
+      if (currentPosition != -1 && currentPosition != newPosition) {
+        for (Fragment fragment : getSupportFragmentManager().getFragments()) {
+          if (!(fragment instanceof MessageSelectorFragment)) {
+            continue;
+          }
+
+          ActionMode action = ((MessageSelectorFragment) fragment).getActionMode();
+          if (action != null) {
+            action.finish();
+          }
+        }
+      }
+      currentPosition = newPosition;
     }
   }
 

src/main/java/org/thoughtcrime/securesms/AllMediaDocumentsAdapter.java

@@ -5,15 +5,16 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-
 import androidx.annotation.NonNull;
-
 import com.b44t.messenger.DcMsg;
 import com.codewaves.stickyheadergrid.StickyHeaderGridAdapter;
-
-import org.thoughtcrime.securesms.components.AudioView;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 import org.thoughtcrime.securesms.components.DocumentView;
 import org.thoughtcrime.securesms.components.WebxdcView;
+import org.thoughtcrime.securesms.components.audioplay.AudioPlaybackViewModel;
+import org.thoughtcrime.securesms.components.audioplay.AudioView;
 import org.thoughtcrime.securesms.database.loaders.BucketedThreadMediaLoader.BucketedThreadMedia;
 import org.thoughtcrime.securesms.mms.AudioSlide;
 import org.thoughtcrime.securesms.mms.DocumentSlide;
@@ -21,30 +22,27 @@ import org.thoughtcrime.securesms.mms.Slide;
 import org.thoughtcrime.securesms.util.DateUtils;
 import org.thoughtcrime.securesms.util.MediaUtil;
 
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
 class AllMediaDocumentsAdapter extends StickyHeaderGridAdapter {
 
-  private final Context             context;
-  private final ItemClickListener   itemClickListener;
-  private final Set<DcMsg>          selected;
+  private final Context context;
+  private final ItemClickListener itemClickListener;
+  private final Set<DcMsg> selected;
 
-  private  BucketedThreadMedia media;
+  private BucketedThreadMedia media;
+  private AudioPlaybackViewModel playbackViewModel;
 
   private static class ViewHolder extends StickyHeaderGridAdapter.ItemViewHolder {
     private final DocumentView documentView;
-    private final AudioView    audioView;
-    private final WebxdcView   webxdcView;
-    private final TextView     date;
+    private final AudioView audioView;
+    private final WebxdcView webxdcView;
+    private final TextView date;
 
     public ViewHolder(View v) {
       super(v);
-      documentView      = v.findViewById(R.id.document_view);
-      audioView         = v.findViewById(R.id.audio_view);
-      webxdcView        = v.findViewById(R.id.webxdc_view);
-      date              = v.findViewById(R.id.date);
+      documentView = v.findViewById(R.id.document_view);
+      audioView = v.findViewById(R.id.audio_view);
+      webxdcView = v.findViewById(R.id.webxdc_view);
+      date = v.findViewById(R.id.date);
     }
   }
 
@@ -57,86 +55,108 @@ class AllMediaDocumentsAdapter extends StickyHeaderGridAdapter {
     }
   }
 
-  AllMediaDocumentsAdapter(@NonNull Context context,
-                           BucketedThreadMedia media,
-                           ItemClickListener clickListener)
-  {
-    this.context           = context;
-    this.media             = media;
+  AllMediaDocumentsAdapter(
+      @NonNull Context context, BucketedThreadMedia media, ItemClickListener clickListener) {
+    this.context = context;
+    this.media = media;
     this.itemClickListener = clickListener;
-    this.selected          = new HashSet<>();
+    this.selected = new HashSet<>();
   }
 
   public void setMedia(BucketedThreadMedia media) {
     this.media = media;
   }
 
+  public void setPlaybackViewModel(AudioPlaybackViewModel playbackViewModel) {
+    this.playbackViewModel = playbackViewModel;
+  }
+
   @Override
-  public StickyHeaderGridAdapter.HeaderViewHolder onCreateHeaderViewHolder(ViewGroup parent, int headerType) {
-    return new HeaderHolder(LayoutInflater.from(context).inflate(R.layout.contact_selection_list_divider, parent, false));
+  public StickyHeaderGridAdapter.HeaderViewHolder onCreateHeaderViewHolder(
+      ViewGroup parent, int headerType) {
+    return new HeaderHolder(
+        LayoutInflater.from(context)
+            .inflate(R.layout.contact_selection_list_divider, parent, false));
   }
 
   @Override
   public ItemViewHolder onCreateItemViewHolder(ViewGroup parent, int itemType) {
-    return new ViewHolder(LayoutInflater.from(context).inflate(R.layout.profile_document_item, parent, false));
+    return new ViewHolder(
+        LayoutInflater.from(context).inflate(R.layout.profile_document_item, parent, false));
   }
 
   @Override
-  public void onBindHeaderViewHolder(StickyHeaderGridAdapter.HeaderViewHolder viewHolder, int section) {
-    ((HeaderHolder)viewHolder).textView.setText(media.getName(section));
+  public void onBindHeaderViewHolder(
+      StickyHeaderGridAdapter.HeaderViewHolder viewHolder, int section) {
+    ((HeaderHolder) viewHolder).textView.setText(media.getName(section));
   }
 
   @Override
   public void onBindItemViewHolder(ItemViewHolder itemViewHolder, int section, int offset) {
-    ViewHolder    viewHolder        = ((ViewHolder)itemViewHolder);
-    DcMsg         dcMsg             = media.get(section, offset);
-    Slide         slide             = MediaUtil.getSlideForMsg(context, dcMsg);
+    ViewHolder viewHolder = ((ViewHolder) itemViewHolder);
+    DcMsg dcMsg = media.get(section, offset);
+    Slide slide = MediaUtil.getSlideForMsg(context, dcMsg);
 
     if (slide != null && slide.hasAudio()) {
       viewHolder.documentView.setVisibility(View.GONE);
       viewHolder.webxdcView.setVisibility(View.GONE);
 
       viewHolder.audioView.setVisibility(View.VISIBLE);
-      viewHolder.audioView.setAudio((AudioSlide)slide, dcMsg.getDuration());
+      viewHolder.audioView.setPlaybackViewModel(playbackViewModel);
+      viewHolder.audioView.setAudio((AudioSlide) slide);
       viewHolder.audioView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
-      viewHolder.audioView.setOnLongClickListener(view -> { itemClickListener.onMediaLongClicked(dcMsg); return true; });
+      viewHolder.audioView.setOnLongClickListener(
+          view -> {
+            itemClickListener.onMediaLongClicked(dcMsg);
+            return true;
+          });
       viewHolder.audioView.disablePlayer(!selected.isEmpty());
       viewHolder.itemView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
       viewHolder.date.setVisibility(View.VISIBLE);
-    }
-    else if (slide != null && slide.isWebxdcDocument()) {
+    } else if (slide != null && slide.isWebxdcDocument()) {
       viewHolder.audioView.setVisibility(View.GONE);
       viewHolder.documentView.setVisibility(View.GONE);
 
       viewHolder.webxdcView.setVisibility(View.VISIBLE);
       viewHolder.webxdcView.setWebxdc(dcMsg, "");
       viewHolder.webxdcView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
-      viewHolder.webxdcView.setOnLongClickListener(view -> { itemClickListener.onMediaLongClicked(dcMsg); return true; });
+      viewHolder.webxdcView.setOnLongClickListener(
+          view -> {
+            itemClickListener.onMediaLongClicked(dcMsg);
+            return true;
+          });
       viewHolder.itemView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
       viewHolder.date.setVisibility(View.GONE);
-    }
-    else if (slide != null && slide.hasDocument()) {
+    } else if (slide != null && slide.hasDocument()) {
       viewHolder.audioView.setVisibility(View.GONE);
       viewHolder.webxdcView.setVisibility(View.GONE);
 
       viewHolder.documentView.setVisibility(View.VISIBLE);
-      viewHolder.documentView.setDocument((DocumentSlide)slide);
+      viewHolder.documentView.setDocument((DocumentSlide) slide);
       viewHolder.documentView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
-      viewHolder.documentView.setOnLongClickListener(view -> { itemClickListener.onMediaLongClicked(dcMsg); return true; });
+      viewHolder.documentView.setOnLongClickListener(
+          view -> {
+            itemClickListener.onMediaLongClicked(dcMsg);
+            return true;
+          });
       viewHolder.itemView.setOnClickListener(view -> itemClickListener.onMediaClicked(dcMsg));
       viewHolder.date.setVisibility(View.VISIBLE);
-    }
-    else {
+    } else {
       viewHolder.documentView.setVisibility(View.GONE);
       viewHolder.audioView.setVisibility(View.GONE);
       viewHolder.webxdcView.setVisibility(View.GONE);
       viewHolder.date.setVisibility(View.GONE);
     }
 
-    viewHolder.itemView.setOnLongClickListener(view -> { itemClickListener.onMediaLongClicked(dcMsg); return true; });
+    viewHolder.itemView.setOnLongClickListener(
+        view -> {
+          itemClickListener.onMediaLongClicked(dcMsg);
+          return true;
+        });
     viewHolder.itemView.setSelected(selected.contains(dcMsg));
 
-    viewHolder.date.setText(DateUtils.getBriefRelativeTimeSpanString(context, dcMsg.getTimestamp()));
+    viewHolder.date.setText(
+        DateUtils.getBriefRelativeTimeSpanString(context, dcMsg.getTimestamp()));
   }
 
   @Override
@@ -177,6 +197,7 @@ class AllMediaDocumentsAdapter extends StickyHeaderGridAdapter {
 
   interface ItemClickListener {
     void onMediaClicked(@NonNull DcMsg mediaRecord);
+
     void onMediaLongClicked(DcMsg mediaRecord);
   }
 }

src/main/java/org/thoughtcrime/securesms/AllMediaDocumentsFragment.java

@@ -12,31 +12,27 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.view.ActionMode;
+import androidx.lifecycle.ViewModelProvider;
 import androidx.loader.app.LoaderManager;
 import androidx.loader.content.Loader;
 import androidx.recyclerview.widget.RecyclerView;
-
 import com.b44t.messenger.DcContext;
 import com.b44t.messenger.DcEvent;
 import com.b44t.messenger.DcMsg;
 import com.codewaves.stickyheadergrid.StickyHeaderGridLayoutManager;
-
+import java.util.Set;
+import org.thoughtcrime.securesms.components.audioplay.AudioPlaybackViewModel;
 import org.thoughtcrime.securesms.connect.DcEventCenter;
 import org.thoughtcrime.securesms.connect.DcHelper;
 import org.thoughtcrime.securesms.database.loaders.BucketedThreadMediaLoader;
 import org.thoughtcrime.securesms.util.ViewUtil;
 
-import java.util.Set;
-
-public class AllMediaDocumentsFragment
-    extends MessageSelectorFragment
+public class AllMediaDocumentsFragment extends MessageSelectorFragment
     implements LoaderManager.LoaderCallbacks<BucketedThreadMediaLoader.BucketedThreadMedia>,
-               AllMediaDocumentsAdapter.ItemClickListener
-{
+        AllMediaDocumentsAdapter.ItemClickListener {
   public static final String CHAT_ID_EXTRA = "chat_id";
   public static final String VIEWTYPE1 = "viewtype1";
   public static final String VIEWTYPE2 = "viewtype2";
@@ -48,13 +44,12 @@ public class AllMediaDocumentsFragment
   private int viewtype1;
   private int viewtype2;
 
-  protected int                chatId;
+  protected int chatId;
 
   @Override
   public void onCreate(Bundle bundle) {
     super.onCreate(bundle);
 
-    dcContext = DcHelper.getContext(getContext());
     chatId = getArguments().getInt(CHAT_ID_EXTRA, -1);
     viewtype1 = getArguments().getInt(VIEWTYPE1, 0);
     viewtype2 = getArguments().getInt(VIEWTYPE2, 0);
@@ -63,19 +58,23 @@ public class AllMediaDocumentsFragment
   }
 
   @Override
-  public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+  public View onCreateView(
+      @NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
     View view = inflater.inflate(R.layout.profile_documents_fragment, container, false);
 
     this.recyclerView = ViewUtil.findById(view, R.id.recycler_view);
-    this.noMedia      = ViewUtil.findById(view, R.id.no_documents);
-    this.gridManager  = new StickyHeaderGridLayoutManager(1);
+    this.noMedia = ViewUtil.findById(view, R.id.no_documents);
+    this.gridManager = new StickyHeaderGridLayoutManager(1);
 
     // add padding to avoid content hidden behind system bars
     ViewUtil.applyWindowInsets(recyclerView, true, false, true, true);
 
-    this.recyclerView.setAdapter(new AllMediaDocumentsAdapter(getContext(),
-        new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()),
-        this));
+    AllMediaDocumentsAdapter adapter =
+        new AllMediaDocumentsAdapter(
+            getContext(), new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()), this);
+    this.recyclerView.setAdapter(adapter);
+    adapter.setPlaybackViewModel(
+        new ViewModelProvider(requireActivity()).get(AudioPlaybackViewModel.class));
     this.recyclerView.setLayoutManager(gridManager);
     this.recyclerView.setHasFixedSize(true);
 
@@ -106,12 +105,15 @@ public class AllMediaDocumentsFragment
   }
 
   @Override
-  public Loader<BucketedThreadMediaLoader.BucketedThreadMedia> onCreateLoader(int i, Bundle bundle) {
+  public Loader<BucketedThreadMediaLoader.BucketedThreadMedia> onCreateLoader(
+      int i, Bundle bundle) {
     return new BucketedThreadMediaLoader(getContext(), chatId, viewtype1, viewtype2, 0);
   }
 
   @Override
-  public void onLoadFinished(Loader<BucketedThreadMediaLoader.BucketedThreadMedia> loader, BucketedThreadMediaLoader.BucketedThreadMedia bucketedThreadMedia) {
+  public void onLoadFinished(
+      Loader<BucketedThreadMediaLoader.BucketedThreadMedia> loader,
+      BucketedThreadMediaLoader.BucketedThreadMedia bucketedThreadMedia) {
     ((AllMediaDocumentsAdapter) recyclerView.getAdapter()).setMedia(bucketedThreadMedia);
     ((AllMediaDocumentsAdapter) recyclerView.getAdapter()).notifyAllSectionsDataSetChanged();
 
@@ -119,7 +121,7 @@ public class AllMediaDocumentsFragment
     if (chatId == DC_CHAT_NO_CHAT) {
       if (viewtype1 == DcMsg.DC_MSG_WEBXDC) {
         noMedia.setText(R.string.all_apps_empty_hint);
-      } else if (viewtype1 == DcMsg.DC_MSG_FILE){
+      } else if (viewtype1 == DcMsg.DC_MSG_FILE) {
         noMedia.setText(R.string.all_files_empty_hint);
       } else {
         noMedia.setText(R.string.tab_all_media_empty_hint);
@@ -134,7 +136,8 @@ public class AllMediaDocumentsFragment
 
   @Override
   public void onLoaderReset(Loader<BucketedThreadMediaLoader.BucketedThreadMedia> cursorLoader) {
-    ((AllMediaDocumentsAdapter) recyclerView.getAdapter()).setMedia(new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()));
+    ((AllMediaDocumentsAdapter) recyclerView.getAdapter())
+        .setMedia(new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()));
   }
 
   @Override
@@ -165,7 +168,7 @@ public class AllMediaDocumentsFragment
 
   private void handleMediaPreviewClick(@NonNull DcMsg dcMsg) {
     // audio is started by the play-button
-    if (dcMsg.getType()==DcMsg.DC_MSG_AUDIO || dcMsg.getType()==DcMsg.DC_MSG_VOICE) {
+    if (dcMsg.getType() == DcMsg.DC_MSG_AUDIO || dcMsg.getType() == DcMsg.DC_MSG_VOICE) {
       return;
     }
 
@@ -213,7 +216,8 @@ public class AllMediaDocumentsFragment
     }
     menu.findItem(R.id.menu_resend).setVisible(canResend);
 
-    boolean webxdcApp = singleSelection && messageRecords.iterator().next().getType() == DcMsg.DC_MSG_WEBXDC;
+    boolean webxdcApp =
+        singleSelection && messageRecords.iterator().next().getType() == DcMsg.DC_MSG_WEBXDC;
     menu.findItem(R.id.menu_add_to_home_screen).setVisible(webxdcApp);
   }
 
@@ -240,19 +244,26 @@ public class AllMediaDocumentsFragment
     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem menuItem) {
       int itemId = menuItem.getItemId();
+      AudioPlaybackViewModel playbackViewModel =
+          new ViewModelProvider(requireActivity()).get(AudioPlaybackViewModel.class);
       if (itemId == R.id.details) {
         handleDisplayDetails(getSelectedMessageRecord(getListAdapter().getSelectedMedia()));
         mode.finish();
         return true;
       } else if (itemId == R.id.delete) {
-        handleDeleteMessages(chatId, getListAdapter().getSelectedMedia());
+        handleDeleteMessages(
+            chatId,
+            getListAdapter().getSelectedMedia(),
+            playbackViewModel::stopByIds,
+            playbackViewModel::stopByIds);
         mode.finish();
         return true;
       } else if (itemId == R.id.share) {
         handleShare(getSelectedMessageRecord(getListAdapter().getSelectedMedia()));
         return true;
       } else if (itemId == R.id.menu_add_to_home_screen) {
-        WebxdcActivity.addToHomeScreen(getActivity(), getSelectedMessageRecord(getListAdapter().getSelectedMedia()).getId());
+        WebxdcActivity.addToHomeScreen(
+            getActivity(), getSelectedMessageRecord(getListAdapter().getSelectedMedia()).getId());
         mode.finish();
         return true;
       } else if (itemId == R.id.show_in_chat) {

src/main/java/org/thoughtcrime/securesms/AllMediaGalleryAdapter.java

@@ -5,38 +5,34 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-
 import androidx.annotation.NonNull;
-
 import com.b44t.messenger.DcMsg;
 import com.codewaves.stickyheadergrid.StickyHeaderGridAdapter;
-
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 import org.thoughtcrime.securesms.components.ThumbnailView;
 import org.thoughtcrime.securesms.database.loaders.BucketedThreadMediaLoader.BucketedThreadMedia;
 import org.thoughtcrime.securesms.mms.GlideRequests;
 import org.thoughtcrime.securesms.mms.Slide;
 import org.thoughtcrime.securesms.util.MediaUtil;
 
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
 class AllMediaGalleryAdapter extends StickyHeaderGridAdapter {
 
-  private final Context             context;
-  private final GlideRequests       glideRequests;
-  private final ItemClickListener   itemClickListener;
-  private final Set<DcMsg>    selected;
+  private final Context context;
+  private final GlideRequests glideRequests;
+  private final ItemClickListener itemClickListener;
+  private final Set<DcMsg> selected;
 
-  private  BucketedThreadMedia media;
+  private BucketedThreadMedia media;
 
   private static class ViewHolder extends StickyHeaderGridAdapter.ItemViewHolder {
     final ThumbnailView imageView;
-    final View          selectedIndicator;
+    final View selectedIndicator;
 
     ViewHolder(View v) {
       super(v);
-      imageView         = v.findViewById(R.id.image);
+      imageView = v.findViewById(R.id.image);
       selectedIndicator = v.findViewById(R.id.selected_indicator);
     }
   }
@@ -50,16 +46,16 @@ class AllMediaGalleryAdapter extends StickyHeaderGridAdapter {
     }
   }
 
-  AllMediaGalleryAdapter(@NonNull Context context,
-                         @NonNull GlideRequests glideRequests,
-                         BucketedThreadMedia media,
-                         ItemClickListener clickListener)
-  {
-    this.context           = context;
-    this.glideRequests     = glideRequests;
-    this.media             = media;
+  AllMediaGalleryAdapter(
+      @NonNull Context context,
+      @NonNull GlideRequests glideRequests,
+      BucketedThreadMedia media,
+      ItemClickListener clickListener) {
+    this.context = context;
+    this.glideRequests = glideRequests;
+    this.media = media;
     this.itemClickListener = clickListener;
-    this.selected          = new HashSet<>();
+    this.selected = new HashSet<>();
   }
 
   public void setMedia(BucketedThreadMedia media) {
@@ -67,36 +63,42 @@ class AllMediaGalleryAdapter extends StickyHeaderGridAdapter {
   }
 
   @Override
-  public StickyHeaderGridAdapter.HeaderViewHolder onCreateHeaderViewHolder(ViewGroup parent, int headerType) {
-    return new HeaderHolder(LayoutInflater.from(context).inflate(R.layout.contact_selection_list_divider, parent, false));
+  public StickyHeaderGridAdapter.HeaderViewHolder onCreateHeaderViewHolder(
+      ViewGroup parent, int headerType) {
+    return new HeaderHolder(
+        LayoutInflater.from(context)
+            .inflate(R.layout.contact_selection_list_divider, parent, false));
   }
 
   @Override
   public ItemViewHolder onCreateItemViewHolder(ViewGroup parent, int itemType) {
-    return new ViewHolder(LayoutInflater.from(context).inflate(R.layout.profile_gallery_item, parent, false));
+    return new ViewHolder(
+        LayoutInflater.from(context).inflate(R.layout.profile_gallery_item, parent, false));
   }
 
   @Override
-  public void onBindHeaderViewHolder(StickyHeaderGridAdapter.HeaderViewHolder viewHolder, int section) {
-    ((HeaderHolder)viewHolder).textView.setText(media.getName(section));
+  public void onBindHeaderViewHolder(
+      StickyHeaderGridAdapter.HeaderViewHolder viewHolder, int section) {
+    ((HeaderHolder) viewHolder).textView.setText(media.getName(section));
   }
 
   @Override
   public void onBindItemViewHolder(ItemViewHolder viewHolder, int section, int offset) {
-    DcMsg         mediaRecord       = media.get(section, offset);
-    ThumbnailView thumbnailView     = ((ViewHolder)viewHolder).imageView;
-    View          selectedIndicator = ((ViewHolder)viewHolder).selectedIndicator;
-    Slide         slide             = MediaUtil.getSlideForMsg(context, mediaRecord);
+    DcMsg mediaRecord = media.get(section, offset);
+    ThumbnailView thumbnailView = ((ViewHolder) viewHolder).imageView;
+    View selectedIndicator = ((ViewHolder) viewHolder).selectedIndicator;
+    Slide slide = MediaUtil.getSlideForMsg(context, mediaRecord);
 
     if (slide != null) {
       thumbnailView.setImageResource(glideRequests, slide);
     }
 
     thumbnailView.setOnClickListener(view -> itemClickListener.onMediaClicked(mediaRecord));
-    thumbnailView.setOnLongClickListener(view -> {
-      itemClickListener.onMediaLongClicked(mediaRecord);
-      return true;
-    });
+    thumbnailView.setOnLongClickListener(
+        view -> {
+          itemClickListener.onMediaLongClicked(mediaRecord);
+          return true;
+        });
 
     selectedIndicator.setVisibility(selected.contains(mediaRecord) ? View.VISIBLE : View.GONE);
   }
@@ -139,6 +141,7 @@ class AllMediaGalleryAdapter extends StickyHeaderGridAdapter {
 
   interface ItemClickListener {
     void onMediaClicked(@NonNull DcMsg mediaRecord);
+
     void onMediaLongClicked(DcMsg mediaRecord);
   }
 }

src/main/java/org/thoughtcrime/securesms/AllMediaGalleryFragment.java

@@ -12,19 +12,17 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.view.ActionMode;
 import androidx.loader.app.LoaderManager;
 import androidx.loader.content.Loader;
 import androidx.recyclerview.widget.RecyclerView;
-
 import com.b44t.messenger.DcContext;
 import com.b44t.messenger.DcEvent;
 import com.b44t.messenger.DcMsg;
 import com.codewaves.stickyheadergrid.StickyHeaderGridLayoutManager;
-
+import java.util.Set;
 import org.thoughtcrime.securesms.connect.DcEventCenter;
 import org.thoughtcrime.securesms.connect.DcHelper;
 import org.thoughtcrime.securesms.database.Address;
@@ -32,13 +30,9 @@ import org.thoughtcrime.securesms.database.loaders.BucketedThreadMediaLoader;
 import org.thoughtcrime.securesms.mms.GlideApp;
 import org.thoughtcrime.securesms.util.ViewUtil;
 
-import java.util.Set;
-
-public class AllMediaGalleryFragment
-    extends MessageSelectorFragment
+public class AllMediaGalleryFragment extends MessageSelectorFragment
     implements LoaderManager.LoaderCallbacks<BucketedThreadMediaLoader.BucketedThreadMedia>,
-               AllMediaGalleryAdapter.ItemClickListener
-{
+        AllMediaGalleryAdapter.ItemClickListener {
   public static final String CHAT_ID_EXTRA = "chat_id";
 
   protected TextView noMedia;
@@ -46,33 +40,35 @@ public class AllMediaGalleryFragment
   private StickyHeaderGridLayoutManager gridManager;
   private final ActionModeCallback actionModeCallback = new ActionModeCallback();
 
-  private int                  chatId;
+  private int chatId;
 
   @Override
   public void onCreate(Bundle bundle) {
     super.onCreate(bundle);
 
-    dcContext = DcHelper.getContext(getContext());
     chatId = getArguments().getInt(CHAT_ID_EXTRA, -1);
 
     getLoaderManager().initLoader(0, null, this);
   }
 
   @Override
-  public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+  public View onCreateView(
+      @NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
     View view = inflater.inflate(R.layout.profile_gallery_fragment, container, false);
 
     this.recyclerView = ViewUtil.findById(view, R.id.media_grid);
-    this.noMedia      = ViewUtil.findById(view, R.id.no_images);
-    this.gridManager  = new StickyHeaderGridLayoutManager(getCols());
+    this.noMedia = ViewUtil.findById(view, R.id.no_images);
+    this.gridManager = new StickyHeaderGridLayoutManager(getCols());
 
     // add padding to avoid content hidden behind system bars
     ViewUtil.applyWindowInsets(recyclerView, true, false, true, true);
 
-    this.recyclerView.setAdapter(new AllMediaGalleryAdapter(getContext(),
-                                                         GlideApp.with(this),
-                                                         new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()),
-                                                         this));
+    this.recyclerView.setAdapter(
+        new AllMediaGalleryAdapter(
+            getContext(),
+            GlideApp.with(this),
+            new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()),
+            this));
     this.recyclerView.setLayoutManager(gridManager);
     this.recyclerView.setHasFixedSize(true);
 
@@ -95,7 +91,9 @@ public class AllMediaGalleryFragment
   }
 
   private int getCols() {
-    return getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE? 5 : 3;
+    return getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE
+        ? 5
+        : 3;
   }
 
   @Override
@@ -108,12 +106,16 @@ public class AllMediaGalleryFragment
   }
 
   @Override
-  public Loader<BucketedThreadMediaLoader.BucketedThreadMedia> onCreateLoader(int i, Bundle bundle) {
-    return new BucketedThreadMediaLoader(getContext(), chatId, DcMsg.DC_MSG_IMAGE, DcMsg.DC_MSG_GIF, DcMsg.DC_MSG_VIDEO);
+  public Loader<BucketedThreadMediaLoader.BucketedThreadMedia> onCreateLoader(
+      int i, Bundle bundle) {
+    return new BucketedThreadMediaLoader(
+        getContext(), chatId, DcMsg.DC_MSG_IMAGE, DcMsg.DC_MSG_GIF, DcMsg.DC_MSG_VIDEO);
   }
 
   @Override
-  public void onLoadFinished(Loader<BucketedThreadMediaLoader.BucketedThreadMedia> loader, BucketedThreadMediaLoader.BucketedThreadMedia bucketedThreadMedia) {
+  public void onLoadFinished(
+      Loader<BucketedThreadMediaLoader.BucketedThreadMedia> loader,
+      BucketedThreadMediaLoader.BucketedThreadMedia bucketedThreadMedia) {
     ((AllMediaGalleryAdapter) recyclerView.getAdapter()).setMedia(bucketedThreadMedia);
     ((AllMediaGalleryAdapter) recyclerView.getAdapter()).notifyAllSectionsDataSetChanged();
 
@@ -126,7 +128,8 @@ public class AllMediaGalleryFragment
 
   @Override
   public void onLoaderReset(Loader<BucketedThreadMediaLoader.BucketedThreadMedia> cursorLoader) {
-    ((AllMediaGalleryAdapter) recyclerView.getAdapter()).setMedia(new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()));
+    ((AllMediaGalleryAdapter) recyclerView.getAdapter())
+        .setMedia(new BucketedThreadMediaLoader.BucketedThreadMedia(getContext()));
   }
 
   @Override