+ quotation provider

frontend/pshared/lib/api/requests/payment/base.dart

@@ -0,0 +1,20 @@
+import 'package:json_annotation/json_annotation.dart';
+
+
+part 'base.g.dart';
+
+
+@JsonSerializable()
+class PaymentBaseRequest {
+  final String idempotencyKey;
+  final Map<String, String>? metadata;
+
+  const PaymentBaseRequest({
+    required this.idempotencyKey,
+    this.metadata,
+  });
+
+  factory PaymentBaseRequest.fromJson(Map<String, dynamic> json) => _$PaymentBaseRequestFromJson(json);
+  Map<String, dynamic> toJson() => _$PaymentBaseRequestToJson(this);
+
+}