clean up

lib/data/services/common_service.dart

@@ -0,0 +1,13 @@
+import 'package:fcs/domain/entities/payment_method.dart';
+import 'package:fcs/domain/vo/message.dart';
+
+abstract class CommonService {
+  // Payment
+  Future<void> createPaymentMethod(PaymentMethod paymentMethod);
+  Future<void> updatePaymentMethod(PaymentMethod paymentMethod);
+  Future<void> deletePayment(String id);
+
+  // Messaging
+  Future<void> sendMessage(Message message);
+  Future<void> seenMessage(String ownerID, bool seenByOwner);
+}