import 'package:uuid/uuid.dart'; class Transaction { String uuid; DateTime date; String category; String description; String account; double value; Transaction({ required this.uuid, required this.date, required this.category, required this.description, required this.account, required this.value }); factory Transaction.fromJson(Map json) { return Transaction( uuid: json['uuid'] ?? const Uuid().v8(), date: DateTime.parse(json['date']), category: json['category'], description: json['description'], account: json['account'], value: double.parse(json['value']), ); } Map toJson() => { 'uuid': uuid, 'date': date.toIso8601String(), 'category': category, 'description': description, 'account': account, 'value': value.toString(), }; }