Cheque Functionality Stop Cheque done

lib/features/cheque/screens/stop_single_cheque_screen.dart

@@ -1,5 +1,9 @@
+import 'dart:convert';
+
 import 'package:flutter/material.dart';
+import 'package:kmobile/api/services/cheque_service.dart';
 import 'package:kmobile/data/models/user.dart';
+import 'package:kmobile/di/injection.dart';
 
 class StopSingleChequeScreen extends StatefulWidget {
   final User selectedAccount;
@@ -27,6 +31,7 @@ class _StopSingleChequeScreenState extends State<StopSingleChequeScreen> {
   final _stopExpiryDateController = TextEditingController();
   final _stopAmountController = TextEditingController();
   final _stopCommentController = TextEditingController();
+  final _chequeService = getIt<ChequeService>();
 
   String _formatDate(String dateString) {
     if (dateString.length != 8) {
@@ -42,6 +47,33 @@ class _StopSingleChequeScreenState extends State<StopSingleChequeScreen> {
     }
   }
 
+  Future<void> _showResponseDialog(String title, String message) async {
+    return showDialog<void>(
+      context: context,
+      barrierDismissible: false, // user must tap button!
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text(title),
+          content: SingleChildScrollView(
+            child: ListBody(
+              children: <Widget>[
+                Text(message),
+              ],
+            ),
+          ),
+          actions: <Widget>[
+            TextButton(
+              child: const Text('Close'),
+              onPressed: () {
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -148,9 +180,32 @@ class _StopSingleChequeScreenState extends State<StopSingleChequeScreen> {
               ),
               const SizedBox(height: 32),
               ElevatedButton(
-                onPressed: () {
+                onPressed: () async {
                   if (_formKey.currentState!.validate()) {
-                    // TODO: Implement stop single cheque logic
+                    try {
+                      final response = await _chequeService.stopCheque(
+                        accountno: widget.selectedAccount.accountNo!,
+                        stopFromChequeNo: _stopFromChequeNoController.text,
+                        instrType: widget.instrType,
+                        stopToChequeNo: _stopFromChequeNoController.text,
+                        stopIssueDate: _stopIssueDateController.text,
+                        stopExpiryDate: _stopExpiryDateController.text,
+                        stopAmount: _stopAmountController.text,
+                        stopComment: _stopCommentController.text,
+                        chequeIssueDate: widget.date,
+                      );
+                      if (!mounted) return;
+                      final decodedResponse = jsonDecode(response);
+                      final status = decodedResponse['status'];
+                      final message = decodedResponse['message'];
+                      if (status == 'SUCCESS') {
+                        _showResponseDialog('Success', message);
+                      } else {
+                        _showResponseDialog('Error', message);
+                      }
+                    } catch (e) {
+                      _showResponseDialog('Error', e.toString());
+                    }
                   }
                 },
                 child: const Text('Stop Cheque'),