Process Payments Through Configured Gateways
Explore how to apply the Strategy Pattern to handle multiple payment gateways in Node.js. Learn to encapsulate payment logic for Stripe, PayPal, and Crypto, enabling runtime switching without modifying core processing code. This lesson teaches you to build expandable and maintainable payment services by delegating behavior through interchangeable strategies.
We'll cover the following...
We'll cover the following...
Problem statement
Your e-commerce team is rolling out multi-provider payments. Some regions support Stripe (credit cards), while others use PayPal, and a few utilize crypto payments.
Checkout systems often hardcode payment gateway logic with conditionals like:
if (method === 'stripe') { /* Stripe logic */ }else if (method === 'paypal') { /* PayPal logic */ }else if (method === 'crypto') { /* Crypto logic */ }
Every time a new gateway is added, developers must modify this block and redeploy. You’ve decided to ...