import express from 'express';
import fetch from 'node-fetch';
import 'dotenv/config';
const app = express();
app.use(express.json());
app.use(express.urlencoded({
extended: true
}));
//You will only need this line for localhost self-cert SendGrid REST API
//If you don't plan on using SendGrid with the REST method below or
//if your dev environment isn't localhost but a secure HTTPS standard website URL,
//then you will not need this line and shouldn't use it (for security)
process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
const port = process.env.PORT || 3000;
const environment = process.env.ENVIRONMENT || 'sandbox';
const client_id = process.env.CLIENT_ID;
const client_secret = process.env.CLIENT_SECRET;
const endpoint_url = environment === 'sandbox' ? 'https://api-m.sandbox.paypal.com' : 'https://api-m.paypal.com';
/**
* Creates an order and returns it as a JSON response.
* @function
* @name createOrder
* @memberof module:routes
* @param {object} req - The HTTP request object.
* @param {object} req.body - The request body containing the order information.
* @param {string} req.body.intent - The intent of the order.
* @param {object} res - The HTTP response object.
* @returns {object} The created order as a JSON response.
* @throws {Error} If there is an error creating the order.
*/
app.post('/create_order', (req, res) => {
get_access_token()
.then(access_token => {
let order_data_json = {
'intent': req.body.intent.toUpperCase(),
'purchase_units': [{
'amount': {
'currency_code': 'USD',
'value': '100.00'
}
}]
};
const data = JSON.stringify(order_data_json)
fetch(endpoint_url + '/v2/checkout/orders', { //https://developer.paypal.com/docs/api/orders/v2/#orders_create
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': `Bearer ${access_token}`
},
body: data
})
.then(res => res.json())
.then(json => {
res.send(json);
}) //Send minimal data to client
})
.catch(err => {
console.log(err);
res.status(500).send(err)
})
});
/**
* Completes an order and returns it as a JSON response.
* @function
* @name completeOrder
* @memberof module:routes
* @param {object} req - The HTTP request object.
* @param {object} req.body - The request body containing the order ID and intent.
* @param {string} req.body.order_id - The ID of the order to complete.
* @param {string} req.body.intent - The intent of the order.
* @param {string} [req.body.email] - Optional email to send receipt.
* @param {object} res - The HTTP response object.
* @returns {object} The completed order as a JSON response.
* @throws {Error} If there is an error completing the order.
*/
app.post('/complete_order', (req, res) => {
get_access_token()
.then(access_token => {
fetch(endpoint_url + '/v2/checkout/orders/' + req.body.order_id + '/' + req.body.intent, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': `Bearer ${access_token}`
}
})
.then(res => res.json())
.then(json => {
console.log(json);
//Remove this if you don't want to send email with SendGrid
if (json.id) {
send_email_receipt({"id": json.id, "email": req.body.email});
}
res.send(json);
}) //Send minimal data to client
})
.catch(err => {
console.log(err);
res.status(500).send(err)
})
});
/**
* Retrieves a client token and returns it as a JSON response.
* @function
* @name getClientToken
* @memberof module:routes
* @param {object} req - The HTTP request object.
* @param {object} req.body - The request body containing the access token and optional customer ID.
* @param {string} req.body.access_token - The access token used for authorization.
* @param {string} [req.body.customer_id] - Optional customer ID to be included in the request.
* @param {object} res - The HTTP response object.
* @returns {object} The client token as a JSON response.
* @throws {Error} If there is an error retrieving the client token.
*/
app.post("/get_client_token", (req, res) => {
get_access_token()
.then((access_token) => {
const payload = req.body.customer_id
? JSON.stringify({ customer_id: req.body.customer_id })
: null;
fetch(endpoint_url + "/v1/identity/generate-token", {
method: "post",
headers: {
Authorization: `Bearer ${access_token}`,
"Content-Type": "application/json",
},
body: payload,
})
.then((response) => response.json())
.then((data) => res.send(data.client_token));
})
.catch((error) => {
console.error("Error:", error);
res.status(500).send("An error occurred while processing the request.");
});
});
// Helper / Utility functions
//Servers the index.html file
app.get('/', (req, res) => {
res.sendFile(process.cwd() + '/index.html');
});
//Servers the style.css file
app.get('/style.css', (req, res) => {
res.sendFile(process.cwd() + '/style.css');
});
//Servers the script.js file
app.get('/script.js', (req, res) => {
res.sendFile(process.cwd() + '/script.js');
});
//Send email with SendGrid BEGIN
function send_email_receipt(object) {
const sendgrid_api_key = 'REPLACE_WITH_SENDGRID_API_KEY';
let html_email_content = `
Thank you for purchasing the NFT! Your transaction ID is: ${object.id}. We appreciate your patronage
