+ quotation provider

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

@@ -0,0 +1,24 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'asset.g.dart';
+
+
+@JsonSerializable()
+class AssetDTO {
+  final String chain;
+
+  @JsonKey(name: 'token_symbol')
+  final String tokenSymbol;
+
+  @JsonKey(name: 'contract_address')
+  final String? contractAddress;
+
+  const AssetDTO({
+    required this.chain,
+    required this.tokenSymbol,
+    this.contractAddress,
+  });
+
+  factory AssetDTO.fromJson(Map<String, dynamic> json) => _$AssetDTOFromJson(json);
+  Map<String, dynamic> toJson() => _$AssetDTOToJson(this);
+}