feat: added SurrealWasmMutex class

example/flutter_console_widget/lib/flutter_console.dart

@@ -16,10 +16,10 @@ class FlutterConsole extends StatelessWidget {
     required this.height,
     this.inputBackground = const Color(0xff333333),
     this.inputTextColor = Colors.white,
-    Key? key,
+    super.key,
     this.scrollColor = Colors.grey,
     required this.width,
-  }) : super(key: key);
+  });
 
   final Color consoleBackground;
   final Color consoleTextColor;

example/flutter_console_widget/lib/selectable_colored_text.dart

@@ -10,11 +10,11 @@ class SelectableColoredText extends StatefulWidget {
 
   const SelectableColoredText(
     this.text, {
-    Key? key,
+    super.key,
     this.style,
     required this.selectedTextColor,
     required this.selectedTextBackgroundColor,
-  }) : super(key: key);
+  });
 
   @override
   // ignore: library_private_types_in_public_api

integration_test/patch_test.dart

@@ -5,7 +5,7 @@ import 'package:surrealdb_wasm/surrealdb_wasm.dart';
 void main({bool wasm = false}) {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
-  final db = SurrealWasm.getInstance();
+  final db = SurrealWasmMutex.getInstance();
 
   setUpAll(() async {
     if (wasm) {

integration_test/surrealdb_wasm_test.dart

@@ -8,7 +8,7 @@ import 'package:surrealdb_wasm/surrealdb_wasm.dart';
 void main({bool wasm = false}) {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
-  final db = SurrealWasm.getInstance();
+  final db = SurrealWasmMutex.getInstance();
   //Tests run with local SurrealDB instance started with the command below:
   //surreal start memory --log trace --allow-all --auth --user root --pass root
   setUpAll(() async {

integration_test/transaction_test.dart

@@ -10,7 +10,7 @@ import 'package:surrealdb_wasm/surrealdb_wasm.dart';
 void main({bool wasm = false}) {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
-  final db = SurrealWasm.getInstance();
+  final db = SurrealWasmMutex.getInstance();
 
   setUpAll(() async {
     if (wasm) {

lib/src/surreal_wasm_mutex.dart

@@ -0,0 +1,163 @@
+import 'package:mutex/mutex.dart';
+import 'package:surrealdb_js/surrealdb_js.dart';
+import 'package:surrealdb_wasm/surrealdb_wasm.dart';
+
+/// The class implemented to workaround the following issue
+/// of the surrealdb.wasm:
+/// https://github.com/surrealdb/surrealdb.wasm/issues/87.
+class SurrealWasmMutex extends Surreal {
+  /// Instantiation of the [Surreal] class with the [WasmEngine].
+  SurrealWasmMutex() : super({'engines': WasmEngine()});
+  final _mutex = Mutex();
+
+  /// Returns a new instance of the [Surreal] class
+  /// with the [SurrealWasmMutex] implementation.
+  static Surreal getInstance() {
+    return SurrealWasmMutex();
+  }
+
+  @override
+  Future<void> let(String key, Object value) async {
+    await _mutex.protect(() async {
+      return super.let(key, value);
+    });
+  }
+
+  @override
+  Future<void> unset(String key) async {
+    await _mutex.protect(() async {
+      return super.unset(key);
+    });
+  }
+
+  @override
+  Future<Object?> signup(Map<String, dynamic> credentials) async {
+    return _mutex.protect(() async {
+      return super.signup(credentials);
+    });
+  }
+
+  @override
+  Future<Object?> signin(Map<String, dynamic> credentials) async {
+    return _mutex.protect(() async {
+      return super.signin(credentials);
+    });
+  }
+
+  @override
+  Future<void> invalidate() async {
+    await _mutex.protect(() async {
+      return super.invalidate();
+    });
+  }
+
+  @override
+  Future<void> authenticate(String token) async {
+    await _mutex.protect(() async {
+      return super.authenticate(token);
+    });
+  }
+
+  @override
+  Future<Object?> info() async {
+    return _mutex.protect(() async {
+      return super.info();
+    });
+  }
+
+  @override
+  Future<Object?> patch(
+    String resource,
+    List<Map<String, dynamic>> data,
+  ) async {
+    return _mutex.protect(() async {
+      return super.patch(resource, data);
+    });
+  }
+
+  @override
+  Future<String> version() async {
+    return _mutex.protect(() async {
+      return super.version();
+    });
+  }
+
+  @override
+  Future<void> connect(
+    String endpoint, {
+    Map<String, dynamic> options = const {},
+  }) async {
+    await _mutex.protect(() async {
+      return super.connect(endpoint, options: options);
+    });
+  }
+
+  @override
+  Future<void> close() async {
+    await _mutex.protect(() async {
+      return super.close();
+    });
+  }
+
+  @override
+  Future<void> use({String? namespace, String? database}) async {
+    await _mutex.protect(() async {
+      return super.use(namespace: namespace, database: database);
+    });
+  }
+
+  @override
+  Future<Object?> create(String resource, Object data) async {
+    return _mutex.protect(() async {
+      return super.create(resource, data);
+    });
+  }
+
+  @override
+  Future<Object?> update(String resource, Object data) async {
+    return _mutex.protect(() async {
+      return super.update(resource, data);
+    });
+  }
+
+  @override
+  Future<Object?> merge(String resource, Object data) async {
+    return _mutex.protect(() async {
+      return super.merge(resource, data);
+    });
+  }
+
+  @override
+  Future<Object?> select(String resource) async {
+    return _mutex.protect(() async {
+      return super.select(resource);
+    });
+  }
+
+  @override
+  Future<Object?> query(
+    String sql, {
+    Map<String, dynamic> bindings = const {},
+  }) async {
+    return _mutex.protect(() async {
+      return super.query(sql, bindings: bindings);
+    });
+  }
+
+  @override
+  Future<Object?> delete(String resource) async {
+    return _mutex.protect(() async {
+      return super.delete(resource);
+    });
+  }
+
+  @override
+  Future<Object?> transaction(
+    Future<void> Function(Transaction txn) action, {
+    Duration timeout = const Duration(seconds: 5),
+  }) async {
+    return _mutex.protect(() async {
+      return super.transaction(action, timeout: timeout);
+    });
+  }
+}

lib/surrealdb_wasm.dart

@@ -3,3 +3,4 @@ library surrealdb_wasm;
 
 export 'src/js.dart';
 export 'src/surreal_wasm.dart';
+export 'src/surreal_wasm_mutex.dart';

pubspec.yaml

@@ -10,6 +10,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  mutex: ^3.1.0
   surrealdb_js: ^1.0.0-beta.20+4
 
 dev_dependencies: