server.js

import express from "express";
import dotenv from "dotenv";
import stripe from "stripe";

// load variables
dotenv.config();

//  start server
const app = express();

app.use(express.static("public"));
app.use(express.json());

// home route
app.get("/", (req, res) => {
  res.sendFile("index.html", { root: "public" });
});
//success
app.get("/success", (req, res) => {
  res.sendFile("success.html", { root: "public" });
});
// cancel
app.get("/cancel", (req, res) => {
  res.sendFile("cancel.html", { root: "public" });
});

//stripe
let stripeGateway = stripe(process.env.stripe_api);
let DOMAIN = process.env.DOMAIN;

app.post("/stripe-checkout", async (req, res) => {
  const lineItems = req.body.items.map((item) => {
    const unitAmount = parseInt(item.price.replace(/[^0-9.-]+/g, "") * 100);
    console.log("item-price:", item.price);
    console.log("unitAmount:", unitAmount);
    return {
      price_data: {
        currrency: "INR",
        product_data: {
          name: item.title,
          images: [item.productImg],
        },
        unit_amount: unitAmount,
      },
      
      quantity: item.quantity,
    };
  });
  console.log("lineItems:", lineItems);

  //create checkout session
  const session = await stripeGateway.checkout.sessions.create({
    payment_method_types: ["card"],
    mode: "payment",
    success_url: `${DOMAIN}/success`,
    cancel_url: `${DOMAIN}/cancel`,
    line_items: lineItems,
    //Asking Address In stripe Checkout page
    billing_address_collection: "required",
  });
  res.json(session.url);
});

app.listen(3000, () => {
  console.log("listening on port 3000; ");
});