Building a Real-World Payment App

In this section, we will dive into implementing a real-world payment app project using the MERN stack and integrating third-party payment vendors. Building a payment app requires several key components and functionalities to ensure a smooth and secure transaction process.

Setting Up Payment Gateway Integration

To begin with, we need to integrate a payment gateway into our MERN stack application. Payment gateways are third-party services that facilitate secure online transactions. Examples of popular payment gateways include Stripe, PayPal, and Braintree.

Here's an example of how to integrate Stripe as our payment gateway in our MERN stack application:

1// Install the Stripe package
2npm install stripe
3
4// Import the Stripe module
5const stripe = require('stripe')('YOUR_STRIPE_SECRET_KEY');
6
7// Create a payment
8const paymentIntent = await stripe.paymentIntents.create({
9  amount: 1000,
10  currency: 'usd',
11  payment_method_types: ['card'],
12});
13
14// Get the client secret
15const clientSecret = paymentIntent.client_secret;
16
17// Use the client secret to make a payment
18// This step will usually be done on the frontend
19const paymentResult = await stripe.confirmCardPayment(clientSecret, {
20  payment_method: 'pm_card_visa',
21});
22
23// Handle the payment result
24console.log(paymentResult);