+ quotation provider

frontend/pshared/lib/data/dto/payment/currency_pair.dart

@@ -0,0 +1,18 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'currency_pair.g.dart';
+
+
+@JsonSerializable()
+class CurrencyPairDTO {
+  final String base;
+  final String quote;
+
+  const CurrencyPairDTO({
+    required this.base,
+    required this.quote,
+  });
+
+  factory CurrencyPairDTO.fromJson(Map<String, dynamic> json) => _$CurrencyPairDTOFromJson(json);
+  Map<String, dynamic> toJson() => _$CurrencyPairDTOToJson(this);
+}