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modified the example and more on package
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‎README.md‎

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<h1 align="center">bKash(BD) Mobile Finance Payment Gateway for Flutter</h1>
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<p align="center" >
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<img src="#" />
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<img src="#" />
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</p>
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This is a Flutter package for [bKash](https://www.bkash.com/)) BD Payment Gateway. This package can be used in flutter project. We created this package while working for a project and thought to made it release for all so that it helps.
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<!--
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[//]: # (<img src="#" />)
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[//]: # (<img src="#" />)
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[writing package pages](https://dart.dev/guides/libraries/writing-package-pages).
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</p>
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For general information about developing packages, see the Dart guide for
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[creating packages](https://dart.dev/guides/libraries/create-library-packages)
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and the Flutter guide for
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[developing packages and plugins](https://flutter.dev/developing-packages).
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-->
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[![Pub](https://img.shields.io/pub/v/flutter_bkash.svg)](https://pub.dartlang.org/packages/flutter_bkash)
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[![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
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TODO: Put a short description of the package here that helps potential users
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know whether this package might be useful for them.
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This is a Flutter package for [bKash](https://www.bkash.com/) BD Payment Gateway. This package can be used in flutter project. We created this package while working for a project and thought to made it release for all so that it helps.
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## Features
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TODO: List what your package can do. Maybe include images, gifs, or videos.
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List what your package can do. Maybe include images, gifs, or videos.
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## Getting started
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TODO: List prerequisites and provide or point to information on how to
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List prerequisites and provide or point to information on how to
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start using the package.
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## Usage
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TODO: Include short and useful examples for package users. Add longer examples
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Include short and useful examples for package users. Add longer examples
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to `/example` folder.
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```dart
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const like = 'sample';
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```
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## Additional information
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TODO: Tell users more about the package: where to find more information, how to
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Tell users more about the package: where to find more information, how to
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contribute to the package, how to file issues, what response they can expect
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from the package authors, and more.

‎example/lib/main.dart‎

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import 'package:flutter/material.dart';
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import 'dart:convert';
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import 'pages/home_page.dart';
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import 'dart:developer' as dev;
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import 'package:example/utils/style.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_bkash/flutter_bkash.dart';
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void main() {
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// it should be the first line in main method
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home: const HomePage(title: 'bKash Demo'),
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);
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}
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}
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enum Intent { sale, authorization }
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class HomePage extends StatefulWidget {
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final String title;
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const HomePage({Key? key, required this.title}) : super(key: key);
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@override
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HomePageState createState() => HomePageState();
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}
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class HomePageState extends State<HomePage> {
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final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
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final TextEditingController _amountController = TextEditingController();
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Intent _intent = Intent.sale;
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FocusNode? focusNode;
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@override
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void initState() {
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super.initState();
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focusNode = FocusNode();
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}
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@override
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void dispose() {
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// Clean up the focus node when the Form is disposed.
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focusNode!.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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key: _scaffoldKey,
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appBar: AppBar(title: Text(widget.title)),
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body: SingleChildScrollView(
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padding: const EdgeInsets.fromLTRB(80, 40, 80, 40),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'Amount :',
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style: TextStyle(fontWeight: FontWeight.bold),
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),
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Container(
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margin: const EdgeInsets.only(top: 8),
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child: TextFormField(
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focusNode: focusNode,
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controller: _amountController,
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decoration: const InputDecoration(
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hintText: "1240",
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contentPadding: EdgeInsets.symmetric(horizontal: 10, vertical: 0),
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border: OutlineInputBorder(borderRadius: BorderRadius.all(Radius.circular(5)), borderSide: BorderSide(color: Colors.grey)),
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focusedBorder: OutlineInputBorder(
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borderSide: BorderSide(color: Colors.pink, width: 2.0),
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),
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// hintText: reviewTitle,
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),
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keyboardType: TextInputType.number,
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maxLines: 1,
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minLines: 1,
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),
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),
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const SizedBox(height: 40.0),
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const Divider(),
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ListTile(
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title: const Text('Immediate'),
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leading: Radio(
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value: Intent.sale,
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groupValue: _intent,
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onChanged: (value) {
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setState(() => _intent = value!);
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},
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),
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dense: true,
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),
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ListTile(
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title: const Text('Auth and Capture'),
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leading: Radio(
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value: Intent.authorization,
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groupValue: _intent,
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onChanged: (value) {
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setState(() => _intent = value!);
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},
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),
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dense: true,
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),
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const Divider(),
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Center(
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child: TextButton(
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style: TextButton.styleFrom(
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(3.0),
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),
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backgroundColor: Colors.pink),
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child: const Text(
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"Checkout",
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style: TextStyle(color: Colors.white),
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),
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onPressed: () {
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String amount = _amountController.text.trim();
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String intent = _intent == Intent.sale ? "sale" : "authorization";
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if (amount.isEmpty) {
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// if the amount is empty then show the snack-bar
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ScaffoldMessenger.of(context)
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.showSnackBar(const SnackBar(content: Text("Amount is empty. Without amount you can't pay. Try again")));
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return;
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}
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// remove focus from TextField to hide keyboard
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focusNode!.unfocus();
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// Goto BkashPayment page & pass the params
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Navigator.of(context).push(MaterialPageRoute(
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builder: (context) => BkashPayment(
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// amount of your bkash payment
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amount: amount,
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// intent would be (sale / authorization)
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intent: intent,
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// accessToken: '', // if the user have own access token for verify payment
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// currency: 'BDT',
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// bkash url for create payment, when you implement on you project then it be change as your production create url
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createBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/create',
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// bkash url for execute payment, , when you implement on you project then it be change as your production create url
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executeBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/execute',
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// for script url, when you implement on production the set it live script js
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scriptUrl: 'https://scripts.sandbox.bka.sh/versions/1.2.0-beta/checkout/bKash-checkout-sandbox.js',
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// the return value from the package
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// status => 'paymentSuccess', 'paymentFailed', 'paymentError', 'paymentClose'
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// data => return value of response
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paymentStatus: (status, data) {
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dev.log('return status => $status');
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dev.log('return data => $data');
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// when payment success
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if (status == 'paymentSuccess') {
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if (data['transactionStatus'] == 'Completed') {
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Style.basicToast('Payment Success');
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}
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}
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// when payment failed
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else if (status == 'paymentFailed') {
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if (data.isEmpty) {
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Style.errorToast('Payment Failed');
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} else if (data[0]['errorMessage'].toString() != 'null'){
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Style.errorToast("Payment Failed ${data[0]['errorMessage']}");
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} else {
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Style.errorToast("Payment Failed");
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}
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}
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// when payment on error
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else if (status == 'paymentError') {
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Style.errorToast(jsonDecode(data['responseText'])['error']);
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}
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// when payment close on demand closed the windows
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else if (status == 'paymentClose') {
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if (data == 'closedWindow') {
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Style.errorToast('Failed to payment, closed screen');
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} else if (data == 'scriptLoadedFailed') {
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Style.errorToast('Payment screen loading failed');
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}
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}
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// back to screen to pop()
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Navigator.of(context).pop();
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},
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)));
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},
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),
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)
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],
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),
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),
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);
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}
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}

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