update RPC bindings

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

@@ -509,6 +509,8 @@ 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.
@@ -1211,12 +1213,19 @@ 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>

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;
   }