Send read receipts

matrixgw_frontend/src/api/matrix/MatrixApiEvent.ts

@@ -140,4 +140,14 @@ export class MatrixApiEvent {
       uri: `/matrix/room/${room.id}/event/${event_id}`,
     });
   }
+
+  /**
+   * Send event receipt
+   */
+  static async SendReceipt(room: Room, event_id: string): Promise<void> {
+    await APIClient.exec({
+      method: "POST",
+      uri: `/matrix/room/${room.id}/event/${event_id}/receipt`,
+    });
+  }
 }