grasping at straws

cw_bitcoin/lib/litecoin_wallet.dart

@@ -789,6 +789,7 @@ abstract class LitecoinWalletBase extends ElectrumWallet with Store {
   }
 
   Future<StatusResponse> getStatusRequest() async {
+    await getStub();
     final resp = await _stub.status(StatusRequest());
     return resp;
   }

cw_mweb/ios/Classes/CwMwebPlugin.swift

@@ -11,6 +11,7 @@ public class CwMwebPlugin: NSObject, FlutterPlugin {
 
   private static var server: MwebdServer?
   private static var port: Int = 0
+  private static var dataDir: String?
     
   public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
       switch call.method {
@@ -18,25 +19,27 @@ public class CwMwebPlugin: NSObject, FlutterPlugin {
           result("iOS " + UIDevice.current.systemVersion)
       case "start":
           let args = call.arguments as? [String: String]
-        //   print("args: \(args)")
           let dataDir = args?["dataDir"]
-          var error: NSError?
-
-          if dataDir == "stop" && CwMwebPlugin.server != nil {
-              print("Stopping server")
-              CwMwebPlugin.server?.stop()
-              CwMwebPlugin.server = nil
-              result(0)
-              return
+          CwMwebPlugin.dataDir = dataDir
+          startServer(result: result)
+      case "stop":
+          stopServer()
+          result(nil)
+      default:
+          result(FlutterMethodNotImplemented)
+      }
   }
 
+  private func startServer(result: @escaping FlutterResult) {
       if CwMwebPlugin.server == nil {
-              CwMwebPlugin.server = MwebdNewServer("", dataDir, "", &error)
+          var error: NSError?
+          CwMwebPlugin.server = MwebdNewServer("", CwMwebPlugin.dataDir, "", &error)
           
           if let server = CwMwebPlugin.server {
               do {
-                      print("starting server \(CwMwebPlugin.port)")
+                  print("Starting server...")
                   try server.start(0, ret0_: &CwMwebPlugin.port)
+                  print("Server started successfully on port: \(CwMwebPlugin.port)")
                   result(CwMwebPlugin.port)
               } catch let startError as NSError {
                   print("Server Start Error: \(startError.localizedDescription)")
@@ -51,21 +54,18 @@ public class CwMwebPlugin: NSObject, FlutterPlugin {
           }
       } else {
           print("Server already running on port: \(CwMwebPlugin.port)")
-//              result(FlutterError(code: "Server Already Running", message: "The server is already running", details: nil))
           result(CwMwebPlugin.port)
       }
-      
-      
-      // result(0)
-    default:
-      result(FlutterMethodNotImplemented)
   }
+
+  private func stopServer() {
+      print("Stopping server")
+      CwMwebPlugin.server?.stop()
+      CwMwebPlugin.server = nil
+      CwMwebPlugin.port = 0
   }
 
   deinit {
-        print("Stopping and cleaning up server")
-        // Perform cleanup tasks
-        CwMwebPlugin.server?.stop()
-        CwMwebPlugin.server = nil
+      stopServer()
   }
 }

cw_mweb/lib/cw_mweb.dart

@@ -6,22 +6,50 @@ import 'mwebd.pbgrpc.dart';
 class CwMweb {
   static RpcClient? _rpcClient;
   static ClientChannel? _clientChannel;
+  static int? _port;
 
-  static Future<RpcClient> stub() async {
+  static Future<void> _initializeClient() async {
     final appDir = await getApplicationSupportDirectory();
-    int port = await CwMwebPlatform.instance.start(appDir.path) ?? 0;
+    _port = await CwMwebPlatform.instance.start(appDir.path);
+    if (_port == null || _port == 0) {
+      throw Exception("Failed to start server");
+    }
+    print("Attempting to connect to server on port: $_port");
+
     _clientChannel = ClientChannel('127.0.0.1',
-        port: port,
+        port: _port!,
         options: const ChannelOptions(
           credentials: ChannelCredentials.insecure(),
           keepAlive: ClientKeepAliveOptions(permitWithoutCalls: true),
         ));
     _rpcClient = RpcClient(_clientChannel!);
+  }
+
+  static Future<RpcClient> stub({int maxRetries = 3}) async {
+    for (int i = 0; i < maxRetries; i++) {
+      try {
+        if (_rpcClient == null || _clientChannel == null) {
+          await _initializeClient();
+        } else {
+          // Try to use the existing connection
+          var status = await _rpcClient!
+              .status(StatusRequest(), options: CallOptions(timeout: const Duration(seconds: 10)));
+          if (status != null) {
             return _rpcClient!;
           }
+        }
+      } catch (e) {
+        print("Attempt $i failed: $e");
+        if (i == maxRetries - 1) rethrow;
+        await stop();// call stop so we create a new instance before retrying
+        await Future.delayed(Duration(seconds: 2)); // Wait before retrying
+      }
+    }
+    throw Exception("Failed to connect after $maxRetries attempts");
+  }
 
   static Future<void> stop() async {
-    await CwMwebPlatform.instance.start("stop");
+    await CwMwebPlatform.instance.stop();
     await cleanup();
   }
 
@@ -29,5 +57,6 @@ class CwMweb {
     await _clientChannel?.terminate();
     _rpcClient = null;
     _clientChannel = null;
+    _port = null;
   }
 }

cw_mweb/lib/cw_mweb_method_channel.dart

@@ -14,4 +14,9 @@ class MethodChannelCwMweb extends CwMwebPlatform {
     final result = await methodChannel.invokeMethod<int>('start', {'dataDir': dataDir});
     return result;
   }
+
+  @override
+  Future<void> stop() async {
+    await methodChannel.invokeMethod<void>('stop');
+  }
 }

cw_mweb/lib/cw_mweb_platform_interface.dart

@@ -26,4 +26,8 @@ abstract class CwMwebPlatform extends PlatformInterface {
   Future<int?> start(String dataDir) {
     throw UnimplementedError('start() has not been implemented.');
   }
+
+  Future<void> stop() {
+    throw UnimplementedError('stop() has not been implemented.');
+  }
 }

ios/Runner/AppDelegate.swift

@@ -144,4 +144,11 @@ import workmanager
         }
     }
 
+
+  @objc func applicationWillTerminate(_ notification: Notification) {
+    // Call the stop method on your plugin
+    if let plugin = self.registrar(forPlugin: "CwMwebPlugin")?.valuePublished(byPlugin: "CwMwebPlugin") as? CwMwebPlugin {
+      plugin.stop()
+    }
+  }
 }

lib/entities/background_tasks.dart

@@ -84,6 +84,7 @@ void callbackDispatcher() {
             } else {
               syncStatus = 1;
             }
+            print("Sync status ${syncStatus}");
           });
 
           for (int i = 0;; i++) {
@@ -91,8 +92,6 @@ void callbackDispatcher() {
             if (syncStatus == 1) {
               print("sync done!");
               break;
-            } else {
-              print("Sync status ${syncStatus}");
             }
             if (i > 600) {
               return Future.error("Synchronization Timed out");
@@ -199,7 +198,7 @@ class BackgroundTasks {
 
       await Workmanager().initialize(
         callbackDispatcher,
-        isInDebugMode: kDebugMode,
+        isInDebugMode: true,
       );
 
       final inputData = <String, dynamic>{"sync_all": syncAll};
@@ -262,5 +261,11 @@ class BackgroundTasks {
       print(error);
       print(stackTrace);
     }
+    try {
+      Workmanager().cancelByUniqueName(mwebSyncTaskKey);
+    } catch (error, stackTrace) {
+      print(error);
+      print(stackTrace);
+    }
   }
 }

lib/reactions/on_wallet_sync_status_change.dart

@@ -31,7 +31,7 @@ void startWalletSyncStatusChangeReaction(
         await WakelockPlus.disable();
       }
     } catch (e) {
-      print(e.toString());
+      // print(e.toString());
     }
   });
 }