server.js

require("dotenv").config();
const express = require("express");
const SSLCommerzPayment = require("sslcommerz-lts");
const cors = require("cors");
const app = express();

//set middlewares and routes
app.use(cors());
app.use(express.urlencoded({ extended: true }));
app.use(express.json());

const PORT = process.env.PORT || 8080;

app.get("/", async (req, res) => {
	res.status(200).json({
		message: "Welcome to sslcommerz app",
	});
});

app.post("/ssl-request", async (req, res) => {
	const {
		price,
		name,
		customer_name,
		customer_email,
		customer_add = "Dhaka",
		customer_phone = "01300000000",
		customer_postcode = "1000",
		customer_country = "Bangladesh",
		product_category = "Food",
		tran_id,
		auth_token,
	} = req.body;

	const data = {
		total_amount: Number(price),
		currency: "BDT",
		tran_id,
		success_url: `${process.env.SERVER_ROOT}/payment/success?tran_id=${tran_id}?token=${auth_token}`,
		fail_url: `${process.env.SERVER_ROOT}/payment/fail?tran_id=${tran_id}?token=${auth_token}`,
		cancel_url: `${process.env.SERVER_ROOT}/payment/cancel?tran_id=${tran_id}?token=${auth_token}`,
		shipping_method: "No",
		product_name: name,
		product_category: product_category,
		product_profile: "general",
		cus_name: customer_name,
		cus_email: customer_email,
		cus_add1: customer_add,
		cus_add2: customer_add,
		cus_city: customer_add,
		cus_state: customer_add,
		cus_postcode: customer_postcode,
		cus_country: customer_country,
		cus_phone: customer_phone,
		cus_fax: customer_phone,
		multi_card_name: "mastercard",
		value_a: "ref001_A",
		value_b: "ref002_B",
		value_c: "ref003_C",
		value_d: "ref004_D",
		ipn_url: `${process.env.SERVER_ROOT}/payment/notification`,
	};
	console.log("Inside ssl-request route service 🚀");
	try {
		const sslcommerz = new SSLCommerzPayment(
			process.env.STORE_ID,
			process.env.STORE_PASSWORD,
			false //true for live default false for sandbox
		);
		sslcommerz.init(data).then((data) => {
			//https://developer.sslcommerz.com/doc/v4/#returned-parameters

			if (data?.GatewayPageURL) {
				return res.status(200).json({ url: data.GatewayPageURL });
			}

			return res.status(400).json({
				message: "Session was not successful",
			});
		});
	} catch (error) {
		console.error(error);
		return res.status(500).json({ message: "Internal server error on sslcommerz init 💥" });
	}
});

app.use((req, res, next) => {
	res.status(404).json({ message: "Page not found" });
});

app.use((err, req, res, next) => {
	console.error(err);
	res.status(500).json({ message: "Internal server error on sslcommerz 💥" });
});

app.listen(PORT, () => {
	console.info(`Server running at http://localhost:${PORT}`);
});