charges.js

// Load environment variables from our `.env` file
require('dotenv').config();

const path = require('path');
const express = require('express');
// Make sure your STRIPE_SECRET_KEY exists as an environment variable!
// This should look something like `sk_test_xxxxxxxxxxxxxxxxxxxxxxxxx`
// and can be found at https://dashboard.stripe.com/test/apikeys
const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

// We'll use the Express framework to set up our server and API
const app = express();

// Serve static assets from our `/client/build` directory (which will
// make our root path default to rendering `/client/build/index.html`)
app.use(express.static(path.join(__dirname, '../client/build')));

// The express.json() middleware parses request bodies into JSON
app.use(express.json());

// A simple function to create a charge using Stripe
const createCharge = token => {
  return stripe.charges.create({
    source: token,
    amount: 1999, // $19.99
    currency: 'usd',
    description: 'Test charge'
  });
};

// Set up our API endpoint for creating charges with Stripe
app.post('/api/charges', (req, res) => {
  const { body } = req;
  // Use the source token generated by Elements, or default to one
  // of Stripe's test tokens (see https://stripe.com/docs/testing)
  const { token = 'tok_visa' } = body;

  return createCharge(token)
    .then(charge => {
      res.status(200).json({ charge });
    })
    .catch(error => {
      res.status(500).json({ error });
    });
});

const port = process.env.PORT || 3000;

// Start our server on the given port (defaults to 3000)
app.listen(port, () => {
  console.log(`🚀  Server listening on port ${port}`);
});