modified the README.md, example/lib/main.dart and pubspec.yaml

Author: rdnasim

README.md

@@ -15,7 +15,7 @@
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)]()  [![Maintenance](https://img.shields.io/badge/Maintained%3F-yes-green.svg)]() 
 [![Open Source Love svg1](https://badges.frapsoft.com/os/v1/open-source.svg?v=103)](https://github.com/ellerbrock/open-source-badges/)
 
-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.
+This is a [Flutter package](https://pub.dartlang.org/packages/flutter_bkash) 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.
 
 ## How to use:
 
@@ -29,7 +29,7 @@ This will add a line like this to your package's `pubspec.yaml` (and run an impl
 
 ```
 dependencies:
-    flutter_bkash: ^0.1.1
+    flutter_bkash: ^0.1.2
 ```
 
 Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.
@@ -42,37 +42,46 @@ import 'package:flutter_bkash/flutter_bkash.dart';
 `
 
 ## Usage
-examples for see the `/example` folder.
+
+Official Link for API documentation and demo checkout
+- [bKash API Specifications](https://developer.bka.sh/v1.2.0-beta/reference)
+- [bKash Payment Checkout Demo](https://merchantdemo.sandbox.bka.sh/frontend/checkout)
+
+Examples for see the `/example` folder.
 
 **Here is the example code**
 ```
 BkashPayment(  
-    // amount of your bkash payment  
-    amount: '20',  
-    // intent would be (sale / authorization)  
-    intent: 'sale',  
-    // accessToken: '', // if the user have own access token for verify payment  
-    // currency: 'BDT', // bkash url for create payment, when you implement on you project then it be change as your production create url  
-    createBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/create',  
-    // bkash url for execute payment, , when you implement on you project then it be change as your production create url  
-    executeBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/execute',  
-    // for script url, when you implement on production the set it live script js  
-    scriptUrl: 'https://scripts.sandbox.bka.sh/versions/1.2.0-beta/checkout/bKash-checkout-sandbox.js',  
-      
-    // the return value from the package  
-    // status => 'paymentSuccess', 'paymentFailed', 'paymentError', 'paymentClose' // data => return value of response  
-    paymentStatus: (status, data) {  
+    // depend isSandbox (true/false)
+    isSandbox: true,
+    // amount of your bkash payment
+    amount: '20',
+    /// intent would be (sale / authorization)
+    intent: 'sale',
+    // accessToken: '', /// if the user have own access token for verify payment
+    // currency: 'BDT',
+    /// bkash url for create payment, when you implement on you project then it be change as your production create url, [when you send it on sandbox mode, send it as empty string '' or anything]
+    createBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/create',
+    /// bkash url for execute payment, , when you implement on you project then it be change as your production create url, [when you send it on sandbox mode, send it as empty string '' or anything]
+    executeBKashUrl: 'https://merchantserver.sandbox.bka.sh/api/checkout/v1.2.0-beta/payment/execute',
+    /// for script url, when you implement on production the set it live script js (https://scripts.pay.bka.sh/versions/1.2.0-beta/checkout/bKash-checkout-pay.js)
+    scriptUrl: 'https://scripts.sandbox.bka.sh/versions/1.2.0-beta/checkout/bKash-checkout-sandbox.js',
+    /// the return value from the package
+    /// status => 'paymentSuccess', 'paymentFailed', 'paymentError', 'paymentClose'
+    /// data => return value of response
+     
+    paymentStatus: (status, data) {
     dev.log('return status => $status');  
     dev.log('return data => $data');
 
-    // when payment success  
+    /// when payment success  
     if (status == 'paymentSuccess') {
         if (data['transactionStatus'] == 'Completed') {
             Style.basicToast('Payment Success');  
         }
     }  
       
-    // when payment failed  
+    /// when payment failed  
     else if (status == 'paymentFailed') {
         if (data.isEmpty) {
             Style.errorToast('Payment Failed');
@@ -83,26 +92,41 @@ BkashPayment(
         }
     }  
       
-    // when payment on error  
+    /// when payment on error  
     else if (status == 'paymentError') {
         Style.errorToast(jsonDecode(data['responseText'])['error']);
     }  
       
-    // when payment close on demand closed the windows  
+    /// when payment close on demand closed the windows  
     else if (status == 'paymentClose') {
         if (data == 'closedWindow') {
             Style.errorToast('Failed to payment, closed screen');
         } else if (data == 'scriptLoadedFailed') {
             Style.errorToast('Payment screen loading failed');
         }
     }
-    // back to screen to pop()
+    /// back to screen to pop()
     Navigator.of(context).pop();
     },
 )
 ```
 
 ### Importance Notes
 - Read the comments in the example of code
+- See the documents and demo checkout [bKash API Specifications](https://developer.bka.sh/v1.2.0-beta/reference), [bKash Payment Checkout Demo](https://merchantdemo.sandbox.bka.sh/frontend/checkout)
 - **intent** - it would be 'sale' or 'authorization'
 - Payment status return as 'paymentSuccess', 'paymentFailed', 'paymentError', 'paymentClose', find on this keyword of the payment status, then you get the data of response on specific status.
+
+
+## Contributing
+
+Contributions to the **flutter_bkash** package are welcome. Please note the following guidelines before submitting your pull request.
+
+- Follow [Effective Dart: Style](https://dart.dev/guides/language/effective-dart/style) coding standards.
+- Read bKash API documentations first.Please contact with bKash for their api documentation and sandbox access.
+
+## License
+
+flutter_bkash package is licensed under the [BSD 3-Clause License](https://opensource.org/licenses/BSD-3-Clause).
+
+Copyright 2022 [Codeboxr.com Team](https://codeboxr.com/team-codeboxr/). We are not affiliated with bKash and don't give any guarantee.

example/lib/main.dart

@@ -144,6 +144,7 @@ class HomePageState extends State<HomePage> {
                   // Goto BkashPayment page & pass the params
                   Navigator.of(context).push(MaterialPageRoute(
                       builder: (context) => BkashPayment(
+                        /// depend isSandbox (true/false)
                         isSandbox: true,
                         /// amount of your bkash payment
                         amount: amount,

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_bkash
 description: Flutter package for payment gateway service bKash (Bangladesh). bKash payment easy to implement through this package on your flutter project. # TODO: Description length is between 60 to 180 characters.
-version: 0.1.1
+version: 0.1.2
 homepage: https://github.com/codeboxrcodehub/flutter-bkash
 
 environment: