implemented TPIN and quick pay within bank

lib/api/services/auth_service.dart

@@ -51,4 +51,43 @@ class AuthService {
     }
   }
 
+  Future<bool> checkTpin() async {
+    try {
+      final response = await _dio.get('/api/auth/tpin');
+      
+      if (response.statusCode == 200) {
+        return response.data['tpinSet'] as bool;
+      } else {
+        throw AuthException('Failed to check TPIN status');
+      }
+    } on DioException catch (e) {
+      if (kDebugMode) {
+        print(e.toString());
+      }
+      throw NetworkException('Network error during TPIN check');
+    } catch (e) {
+      throw UnexpectedException('Unexpected error during TPIN check: ${e.toString()}');
+    }
+  }
+
+  Future<void> setTpin(String tpin) async {
+    try {
+      final response = await _dio.post(
+        '/api/auth/tpin',
+        data: {'tpin': tpin},
+      );
+      
+      if (response.statusCode != 200) {
+        throw AuthException('Failed to set TPIN');
+      }
+    } on DioException catch (e) {
+      if (kDebugMode) {
+        print(e.toString());
+      }
+      throw NetworkException('Network error during TPIN setup');
+    } catch (e) {
+      throw UnexpectedException('Unexpected error during TPIN setup: ${e.toString()}');
+    }
+  }
+
 }

lib/api/services/payment_service.dart

@@ -0,0 +1,43 @@
+import 'dart:developer';
+
+import 'package:dio/dio.dart';
+import 'package:kmobile/data/models/payment_response.dart';
+import 'package:kmobile/data/models/transfer.dart';
+
+class PaymentService {
+  final Dio _dio;
+  PaymentService(this._dio);
+
+  Future<PaymentResponse> processQuickPayWithinBank(Transfer transfer) async {
+    try {
+      await Future.delayed(const Duration(seconds: 3)); // Simulate delay
+      final response =
+          await _dio.post('/api/payment/transfer', data: transfer.toJson());
+
+      return PaymentResponse(
+        isSuccess: true,
+        date: DateTime.now(),
+        creditedAccount: transfer.toAccount,
+        amount: transfer.amount,
+        currency: "INR",
+        errorMessage: response.data['errorMessage'],
+        errorCode: response.data['errorCode'],
+      );
+    } on DioException catch (e) {
+      log('DioException: ${e.toString()}');
+      if (e.response?.data != null) {
+        return PaymentResponse(
+          isSuccess: false,
+          errorMessage: e.response?.data['error'] ?? 'Unknown error',
+          errorCode: e.response?.data['status'] ?? 'UNKNOWN_ERROR',
+        );
+      }
+      throw Exception(
+          'Failed to process quick pay within bank: ${e.toString()}');
+    } catch (e) {
+      log('Unexpected error: ${e.toString()}');
+      throw Exception(
+          'Failed to process quick pay within bank: ${e.toString()}');
+    }
+  }
+}