Braintree Drop-In UI Express Server Sample (Node)

bt_dropin_node_server.js

var express = require('express'),
    bodyParser = require('body-parser'),
    app = express(),
    util = require('util'),
    braintree = require('braintree');

app.use( bodyParser.json() );       // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({     // to support URL-encoded bodies
    extended: true
})); 

app.use(function (req, res, next) {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
    res.setHeader('Access-Control-Allow-Credentials', true);
	next();
});
 
var gateway = braintree.connect({
    environment: braintree.Environment.Sandbox,
    merchantId: 'YOUR MERCHANT ID',
    publicKey: 'YOUR PUBLIC KEY',
    privateKey: 'YOUR PRIVATE KEY'
});

app.get("/client_token", function (req, res) {
    gateway.clientToken.generate({}, function (err, response) {
        res.send(response.clientToken);
    });
});

app.post("/checkout", function (req, res) {
	var nonce = req.body.payment_method_nonce;
  
    gateway.transaction.sale({
        amount: '10.00',
        paymentMethodNonce: nonce,
    }, function (err, result) {
    	res.send(result);
	});
});

var server = app.listen(3000, function () {
    var host = server.address().address;
    var port = server.address().port;

    console.log('Example app listening at http://%s:%s', host, port);
});