[code gen]: return unit if there is no ouput

app_flowy/lib/user/domain/interface.dart

@@ -6,4 +6,6 @@ abstract class IAuth {
   Future<Either<UserDetail, UserError>> signIn(String? email, String? password);
   Future<Either<UserDetail, UserError>> signUp(
       String? name, String? password, String? email);
+
+  Future<Either<Unit, UserError>> signOut();
 }

app_flowy/lib/user/infrastructure/auth_repo.dart

@@ -27,4 +27,8 @@ class AuthRepository {
 
     return UserEventSignUp(request).send();
   }
+
+  Future<Either<Unit, UserError>> signOut() {
+    return UserEventSignOut().send();
+  }
 }

app_flowy/lib/user/infrastructure/interface_impl.dart

@@ -36,4 +36,9 @@ class AuthImpl extends IAuth {
       String? name, String? password, String? email) {
     return repo.signUp(name: name, password: password, email: email);
   }
+
+  @override
+  Future<Either<Unit, UserError>> signOut() {
+    return repo.signOut();
+  }
 }

app_flowy/packages/flowy_sdk/lib/dispatch/code_gen.dart

@@ -53,12 +53,12 @@ class UserEventSignUp {
 class UserEventSignOut {
     UserEventSignOut();
 
-    Future<Either<Uint8List, UserError>> send() {
+    Future<Either<Unit, UserError>> send() {
      final request = FFIRequest.create()
         ..event = UserEvent.SignOut.toString();
 
      return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
-        (bytes) => left(bytes),
+        (bytes) => left(unit),
         (errBytes) => right(UserError.fromBuffer(errBytes)),
       ));
     }

scripts/flowy-tool/src/dart_event/event_template.rs

@@ -40,14 +40,14 @@ impl EventTemplate {
         self.tera_context
             .insert("has_input", &ctx.input_deserializer.is_some());
         match ctx.input_deserializer {
-            None => self.tera_context.insert("input_deserializer", "Uint8List"),
+            None => self.tera_context.insert("input_deserializer", "Unit"),
             Some(ref input) => self.tera_context.insert("input_deserializer", input),
         }
 
         self.tera_context
             .insert("has_output", &ctx.output_deserializer.is_some());
         match ctx.output_deserializer {
-            None => self.tera_context.insert("output_deserializer", "Uint8List"),
+            None => self.tera_context.insert("output_deserializer", "Unit"),
             Some(ref output) => self.tera_context.insert("output_deserializer", output),
         }
 

scripts/flowy-tool/src/dart_event/event_template.tera

@@ -34,7 +34,7 @@ class {{ event_class }} {
      {%- if has_output  %}
         (okBytes) => left({{ output_deserializer }}.fromBuffer(okBytes)),
      {%- else %}
-        (bytes) => left(bytes),
+        (bytes) => left(unit),
      {%- endif %}
         (errBytes) => right({{ error_deserializer }}.fromBuffer(errBytes)),
       ));