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Paypal server-side implementation with Node.js

Example of Paypal client-side / server-side integration flow.
Essentially this is a full implementation of https://developer.paypal.com/demo/checkout/#/pattern/server

I have kept the files organised making the code portable.

Tooling

  • Node.js es6
  • Target version Node v8.9.4
  • Using Babel to transpile to es5

Prerequisites and configuration

  • Go to https://developer.paypal.com/
  • Create an account (sandbox)
  • Create an app under "My Apps & Credentials"
  • Copy the client ID / secret into .env-sample
  • Rename .env-sample to .env

Start the app

npm i  
npm start

Go to http://localhost:3001 and click the "Paypal Checkout" button. This will start the payment flow. Open your console to see the req / res flow.

Paypal SDK

This project uses the Node.js Paypal REST SDK which under the hood makes HTTP requests to the Paypal API.

The benefit of using the SDK means you don't need to authorise each request, that is all done for you.

Sample payloads

The folder /test/mock contains mock request / response payloads for the SDK. Useful for testing / debugging or just gaining an understanding of how it works.

File tree

.
├── LICENSE
├── README.md
├── logs
│   └── 2018-07-18.log
├── package-lock.json
├── package.json
├── public
│   └── index.html
├── src
│   ├── controllers
│   │   ├── pages.js
│   │   └── paypal.js
│   ├── domain
│   │   ├── order.js
│   │   └── paypal-authorisation.js
│   ├── index.js
│   └── services
│       ├── logger.js
│       └── paypal.js
└── test
    └── mock
        ├── authorise.request.json
        ├── authorise.response.json
        ├── execute.request.json
        ├── execute.response.json
        └── sale.response.json