implemented TPIN and quick pay within bank

lib/data/repositories/transaction_repository.dart

@@ -0,0 +1,28 @@
+import 'package:dio/dio.dart';
+import 'package:kmobile/data/models/transaction.dart';
+
+abstract class TransactionRepository {
+  Future<List<Transaction>> fetchTransactions(String accountNo);
+}
+
+class TransactionRepositoryImpl implements TransactionRepository {
+  final Dio _dio;
+  TransactionRepositoryImpl(this._dio);
+
+  @override
+  Future<List<Transaction>> fetchTransactions(String accountNo) async {
+
+    final resp = await _dio.get('/api/transactions/account/$accountNo');
+
+    if (resp.statusCode != 200) {
+      throw Exception(
+        'Error fetching transactions: ${resp.statusCode} ${resp.statusMessage}',
+      );
+    }
+
+    final List<dynamic> data = resp.data as List<dynamic>;
+    return data
+        .map((e) => Transaction.fromJson(e as Map<String, dynamic>))
+        .toList();
+  }
+}