To build any real world applications such as E-Commerce, SaaS, payment gateway integration is very crucial. Providing customers with a smooth and secured checkout experience is a vital part to be considered while developing such real time applications. It builds trust over the application along with the functionality of secured transactions.

Why we need Payment integration?

The following factors describes the necessity of payment gateway integration in our systems:

Security: It handles the risk of sensitive financial data needed for transactions

Global Reach: Support for multiple currencies enabling international transactions easier

Trust: Using well known providers increases trust and credibility

Convenience: Faster checkouts with wallets, cards and other digital payment options

In this guide, let us walkthrough the steps involved in integrating payment gateway to a React, Node application.

Integration Flow:

Frontend:

  1. Collect payment details from the user
  2. Call the backend to create payment intent/order
  3. Use the payment gateway’s SDK/UI components to confirm the payment

Backend:

  1. Initialize the payment gateway SDK with the secret key
  2. Create payment intent/orders
  3. Verify payment via webhook/client confirmation

Steps to be followed:

  1. Install dependencies in both frontend and backend
  2. Call the backend to create a checkout session

3. Using the frontend SDK, display the payment gateway’s UI component to get the order details from the customer

4. Process the payment by connecting with the gateway and navigate to the success URL configured in the application.

5. If payment is cancelled or encountered any issue, redirect will happen to the cancel URL configured in the application.

6. The checkout session will return a session ID after successful payment. Retrieving this payment intent from the session ID will provide all the details about the order data, payment, etc. passed during creating the checkout session.

    Hence the above illustrations explain the implementation of payment gateway in a real time React and Node application.

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