bKash(BD) Mobile Finance Payment Gateway Flutter Package

This is a Flutter package for bKash BD Payment Gateway. This package can be used in flutter project. We created this package while working for a project and thought to release for all so that it helps.

How to use:

Depend on it, Run this command With Flutter:

$ flutter pub add flutter_bkash

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

dependencies:
    flutter_bkash: ^0.1.3

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more. Import it

Now in your Dart code, you can use:

import 'package:flutter_bkash/flutter_bkash.dart';

Usage

Official Link for API documentation and demo checkout

Examples for see the /example folder.

Here is the example code

BkashPayment(  
    // 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  
    if (status == 'paymentSuccess') {
        if (data['transactionStatus'] == 'Completed') {
            Style.basicToast('Payment Success');  
        }
    }  
      
    /// when payment failed  
    else if (status == 'paymentFailed') {
        if (data.isEmpty) {
            Style.errorToast('Payment Failed');
        } else if (data[0]['errorMessage'].toString() != 'null'){
            Style.errorToast("Payment Failed ${data[0]['errorMessage']}");
        } else {  
            Style.errorToast("Payment Failed");
        }
    }  
      
    /// when payment on error  
    else if (status == 'paymentError') {
        Style.errorToast(jsonDecode(data['responseText'])['error']);
    }  
      
    /// 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()
    Navigator.of(context).pop();
    },
)

Importance Notes

Read the comments in the example of code
See the documents and demo checkout bKash API Specifications, bKash Payment Checkout Demo
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 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.