Integrating Paytm in Flutter: A Step-by-Step Guide

Paytm is an Indian digital payment platform that provides a seamless experience to its users while making online transactions. The platform has a user-friendly interface and supports various modes of payment such as UPI, net banking, credit/debit cards, etc. In this blog, we will discuss the integration of Paytm in a flutter application.

The process of integrating Paytm in flutter involves the following steps:

1. Create a Paytm Merchant Account To integrate Paytm in your flutter application, you need to create a Paytm merchant account. Go to the Paytm for Business website and sign up for a merchant account. After verifying your details, you will get access to your merchant dashboard.

2. Generate API Key and Merchant ID Next, you need to generate an API key and Merchant ID to connect Paytm with your flutter application. To do this, go to the API section in your merchant dashboard and click on the "Generate API Key" button. After generating the API key, copy the API key and Merchant ID, as you will need them while integrating Paytm in your flutter application.

3. Add dependencies to your Flutter Project To integrate Paytm in flutter, you need to add the "paytm" package as a dependency in your flutter project. Open the pubspec.yaml file and add the following code:

dependencies:

paytm: ^0.0.3

4. Implement the Code Once you have added the dependency, you can now integrate the Paytm payment gateway in your flutter application. First, import the paytm package in your dart file.

import 'package:paytm/paytm.dart';

Next, create a function to initiate the Paytm payment process. This function will take the necessary parameters such as the amount, order ID, etc. and will return the response after the payment is completed.

Future<PaytmResponse> initiatePayment(double amount, String orderId) async {

Paytm paytm = Paytm(

merchantId: "Your Merchant ID",

industryTypeId: "Retail",

website: "APPSTAGING",

channelId: "WAP",

orderId: orderId,

customerId: "CUST_001",

txnAmount: amount,

callbackUrl: "Your Callback URL",

checksumUrl: "Your Checksum URL", );

PaytmResponse response = await paytm.startPaytmPayment();

return response;

}

Finally, call the initiatePayment function when the user initiates the payment process.

PaytmResponse response = await initiatePayment(100.0, "ORD_001");

if (response.status == PaytmResponseStatus.success) {

print("Payment Successful");

} else {

print("Payment Failed");

}

Test the Integration After implementing the code, you can now test the integration by running the flutter application. If everything is working fine, the Paytm payment gateway should initiate the payment process and return the response after the payment is completed.

In conclusion, integrating Paytm in flutter is a straightforward process. The paytm package provides a seamless experience to its users while making online transactions in a flutter application. With this integration, you can offer various modes of payment to your customers and provide a seamless experience.

Note: The code mentioned in this blog is for demonstration purposes only. Make sure to replace the placeholder values such as the merchant ID, API

key, callback URL, checksum URL, etc. with your actual values from your Paytm merchant account.

Also, make sure to handle exceptions and errors that may occur during the payment process. You can use the PaytmResponse object to check the status of the payment and handle it accordingly.

In addition to this, it is recommended to use a secure server for generating the checksum and handling the callback URL. This ensures the security of the payment process and protects sensitive information such as customer details and transaction details.

In conclusion, integrating Paytm in a flutter application is a simple process that can greatly benefit your business by providing a seamless payment experience to your customers. By implementing the code mentioned in this blog, you can easily integrate Paytm in your flutter application and start accepting online payments.