server.js

const express = require('express');
const cors = require('cors');
const bodyParser= require('body-parser');
const path = require('path');

if (process.env.NODE_ENV !== 'production') require('dotenv').config();

const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

const app= express();
const port = process.env.PORT || 5000;

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true}));

app.use(cors());

if(process.env.NODE_ENV==='production'){
    app.use(express.static(path.join(__dirname, 'client/build')));

    app.get('*', function(req,res){
        res.sendFile(path.join(__dirname, 'client/build', 'index.html'));
    });
}

app.listen(port, error => {
    if (error) throw error;
    console.log('Server running on port '+port);
});

app.post('/payment', (req, res) => {
    const body ={
        source: req.body.token.id,
        amount: req.body.amount,
        current: 'usd'
    };

    stripe.charges.create(body, (stripeErr, stripeRes) =>{
        if(stripeErr){
            res.status(500).send({ error: stripeErr});
        }else{
            res.status(200).send({ succes: stripeRes});
        }
    });
});