IMPS implementation

lib/api/services/imps_service.dart

@@ -12,7 +12,7 @@ class ImpsService {
     try {
       await Future.delayed(const Duration(seconds: 3));
       final response = await _dio.post(
-        '/api/payment/rtgs',
+        '/api/payment/imps',
         data: transaction.toJson(),
       );
 
@@ -20,7 +20,7 @@ class ImpsService {
         return ImpsResponse.fromJson(response.data);
       } else {
         throw Exception(
-            'RTGS transaction failed with status code: ${response.statusCode}');
+            'IMPS transaction failed with status code: ${response.statusCode}');
       }
     } on DioException {
       rethrow;