added wallet functionality

lib/screens/accounts/models/statement_model.dart

@@ -0,0 +1,63 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'statement_model.g.dart';
+
+@JsonSerializable()
+class TransactionModel {
+  final String name;
+  final String narration;
+  final String party;
+  final String company;
+  final String postingDate;
+  final double amount;
+  final String account;
+  final String accountName;
+  final String currency;
+  final String type;
+  final double balance;
+
+  TransactionModel({
+    required this.name,
+    required this.narration,
+    required this.party,
+    required this.company,
+    required this.postingDate,
+    required this.amount,
+    required this.account,
+    required this.accountName,
+    required this.currency,
+    required this.type,
+    required this.balance,
+  });
+
+  factory TransactionModel.fromJson(Map<String, dynamic> json) =>
+      _$TransactionModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$TransactionModelToJson(this);
+}
+
+@JsonSerializable()
+class StatementModel {
+  final int startBalance;
+  final double endBalance;
+  final List<TransactionModel> transactions;
+  final String accountName;
+  final String accountNumber;
+  final String startDate;
+  final String endDate;
+
+  StatementModel({
+    required this.startBalance,
+    required this.endBalance,
+    required this.transactions,
+    required this.accountName,
+    required this.accountNumber,
+    required this.startDate,
+    required this.endDate,
+  });
+
+  factory StatementModel.fromJson(Map<String, dynamic> json) =>
+      _$StatementModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$StatementModelToJson(this);
+}