Initial draft

lib/dto/discount_update.dart

@@ -0,0 +1,18 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'discount_update.g.dart';
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class DiscountUpdateDTO {
+  DiscountUpdateDTO(
+      {required this.note, required this.deliveryId, required this.discount});
+
+  String? note;
+  String deliveryId;
+  int? discount;
+
+  factory DiscountUpdateDTO.fromJson(Map<String, dynamic> json) =>
+      _$DiscountUpdateDTOFromJson(json);
+
+  Map<dynamic, dynamic> toJson() => _$DiscountUpdateDTOToJson(this);
+}