diff --git a/frontend/app_flowy/packages/flowy_sdk/lib/dispatch/dart_event.dart b/frontend/app_flowy/packages/flowy_sdk/lib/dispatch/dart_event.dart
new file mode 100644
index 0000000000..72789a1366
--- /dev/null
+++ b/frontend/app_flowy/packages/flowy_sdk/lib/dispatch/dart_event.dart
@@ -0,0 +1,568 @@
+
+/// Auto generate. Do not edit
+part of 'dispatch.dart';
+class FolderEventCreateWorkspace {
+     CreateWorkspaceRequest request;
+     FolderEventCreateWorkspace(this.request);
+
+    Future<Either<Workspace, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.CreateWorkspace.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(Workspace.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventReadCurWorkspace {
+    FolderEventReadCurWorkspace();
+
+    Future<Either<CurrentWorkspaceSetting, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = FolderEvent.ReadCurWorkspace.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(CurrentWorkspaceSetting.fromBuffer(okBytes)),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class FolderEventReadWorkspaces {
+     QueryWorkspaceRequest request;
+     FolderEventReadWorkspaces(this.request);
+
+    Future<Either<RepeatedWorkspace, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ReadWorkspaces.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(RepeatedWorkspace.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventDeleteWorkspace {
+     QueryWorkspaceRequest request;
+     FolderEventDeleteWorkspace(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.DeleteWorkspace.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventOpenWorkspace {
+     QueryWorkspaceRequest request;
+     FolderEventOpenWorkspace(this.request);
+
+    Future<Either<Workspace, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.OpenWorkspace.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(Workspace.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventReadWorkspaceApps {
+     QueryWorkspaceRequest request;
+     FolderEventReadWorkspaceApps(this.request);
+
+    Future<Either<RepeatedApp, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ReadWorkspaceApps.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(RepeatedApp.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventCreateApp {
+     CreateAppRequest request;
+     FolderEventCreateApp(this.request);
+
+    Future<Either<App, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.CreateApp.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(App.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventDeleteApp {
+     QueryAppRequest request;
+     FolderEventDeleteApp(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.DeleteApp.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventReadApp {
+     QueryAppRequest request;
+     FolderEventReadApp(this.request);
+
+    Future<Either<App, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ReadApp.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(App.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventUpdateApp {
+     UpdateAppRequest request;
+     FolderEventUpdateApp(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.UpdateApp.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventCreateView {
+     CreateViewRequest request;
+     FolderEventCreateView(this.request);
+
+    Future<Either<View, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.CreateView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(View.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventReadView {
+     QueryViewRequest request;
+     FolderEventReadView(this.request);
+
+    Future<Either<View, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ReadView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(View.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventUpdateView {
+     UpdateViewRequest request;
+     FolderEventUpdateView(this.request);
+
+    Future<Either<View, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.UpdateView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(View.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventDeleteView {
+     QueryViewRequest request;
+     FolderEventDeleteView(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.DeleteView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventDuplicateView {
+     QueryViewRequest request;
+     FolderEventDuplicateView(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.DuplicateView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventCopyLink {
+    FolderEventCopyLink();
+
+    Future<Either<Unit, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = FolderEvent.CopyLink.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (bytes) => left(unit),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class FolderEventOpenDocument {
+     QueryViewRequest request;
+     FolderEventOpenDocument(this.request);
+
+    Future<Either<DocumentDelta, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.OpenDocument.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(DocumentDelta.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventCloseView {
+     QueryViewRequest request;
+     FolderEventCloseView(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.CloseView.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventReadTrash {
+    FolderEventReadTrash();
+
+    Future<Either<RepeatedTrash, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = FolderEvent.ReadTrash.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(RepeatedTrash.fromBuffer(okBytes)),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class FolderEventPutbackTrash {
+     TrashId request;
+     FolderEventPutbackTrash(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.PutbackTrash.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventDeleteTrash {
+     RepeatedTrashId request;
+     FolderEventDeleteTrash(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.DeleteTrash.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventRestoreAllTrash {
+    FolderEventRestoreAllTrash();
+
+    Future<Either<Unit, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = FolderEvent.RestoreAllTrash.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (bytes) => left(unit),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class FolderEventDeleteAllTrash {
+    FolderEventDeleteAllTrash();
+
+    Future<Either<Unit, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = FolderEvent.DeleteAllTrash.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (bytes) => left(unit),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class FolderEventApplyDocDelta {
+     DocumentDelta request;
+     FolderEventApplyDocDelta(this.request);
+
+    Future<Either<DocumentDelta, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ApplyDocDelta.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(DocumentDelta.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class FolderEventExportDocument {
+     ExportRequest request;
+     FolderEventExportDocument(this.request);
+
+    Future<Either<ExportData, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = FolderEvent.ExportDocument.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(ExportData.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class NetworkEventUpdateNetworkType {
+     NetworkState request;
+     NetworkEventUpdateNetworkType(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = NetworkEvent.UpdateNetworkType.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class UserEventInitUser {
+    UserEventInitUser();
+
+    Future<Either<Unit, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.InitUser.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (bytes) => left(unit),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class UserEventSignIn {
+     SignInRequest request;
+     UserEventSignIn(this.request);
+
+    Future<Either<UserProfile, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = UserEvent.SignIn.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class UserEventSignUp {
+     SignUpRequest request;
+     UserEventSignUp(this.request);
+
+    Future<Either<UserProfile, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = UserEvent.SignUp.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class UserEventSignOut {
+    UserEventSignOut();
+
+    Future<Either<Unit, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.SignOut.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (bytes) => left(unit),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class UserEventUpdateUser {
+     UpdateUserRequest request;
+     UserEventUpdateUser(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = UserEvent.UpdateUser.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class UserEventGetUserProfile {
+    UserEventGetUserProfile();
+
+    Future<Either<UserProfile, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.GetUserProfile.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class UserEventCheckUser {
+    UserEventCheckUser();
+
+    Future<Either<UserProfile, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.CheckUser.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+
+class UserEventSetAppearanceSetting {
+     AppearanceSettings request;
+     UserEventSetAppearanceSetting(this.request);
+
+    Future<Either<Unit, FlowyError>> send() {
+    final request = FFIRequest.create()
+          ..event = UserEvent.SetAppearanceSetting.toString()
+          ..payload = requestToBytes(this.request);
+
+    return Dispatch.asyncRequest(request)
+        .then((bytesResult) => bytesResult.fold(
+           (bytes) => left(unit),
+           (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+        ));
+    }
+}
+
+class UserEventGetAppearanceSetting {
+    UserEventGetAppearanceSetting();
+
+    Future<Either<AppearanceSettings, FlowyError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.GetAppearanceSetting.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(AppearanceSettings.fromBuffer(okBytes)),
+        (errBytes) => right(FlowyError.fromBuffer(errBytes)),
+      ));
+    }
+}
+