paytm-checksum-api-nodejs

A PayTM checksum api in nodejs to provide backend for Mobile/Web apps

Getting Started

Prerequisites

• PayTM developers account
• NodeJS

Run api

• Update appConfig.js with your merchant-id/key and hosturl
• install dependencies npm install
• run app npm run start

Endpoints

V1 Base url pattern: http://<host>:<port>/api/v1/paytm/<endpoint>

Examples:

http://localhost:3000/api/v1/paytm/healthcheck - To verify if API is running correctly
http://localhost:3000/api/v1/paytm/initiatePayment?order_id=123&customer_id=123&amount=10&email=abc@gmail.com - Will redirect to PayTM gateway for payments
http://localhost:3000/api/v1/paytm/callback - This endpoint is called from PayTM with payload about operation

Deploy API to Firebase Cloud Functions

• Create a new directory
• Navigate to it using console
• Install Firebase tools: npm install -g firebase-tools
• Login to Firebase: firebase login
• Initialize firebase project: firebase init
  • Select your project and Cloud Functions
  • This will create firebase functions project
• Copy server folder from this repository to Functions folder
• Copy dependencies from package.json (this repository) to that new packages.json (in Functions folder)
• Add below lines to Functions/index.js file

  const app = require('./server/app');
  exports.api = functions.https.onRequest(app);

• Cloud function is ready. You can now deploy it using firebase deploy
• Check if it is deployed correctly
  • Go to Firebase Cloud Functions
  • Copy Function URL
  • Navigate to: https://<PROJECT_LOCATION>-<PROJECT_NAME>.cloudfunctions.net/api/api/v1/paytm/healthcheck
  • You should see text: working

You can also refer to firebase-functions-example.