server.js

require("dotenv").config()
const express = require("express");
const cors = require("cors")
const app = express();
// This is your test secret API key.
const stripe = require("stripe")(process.env.STRIPE_PRIVATE_KEY);

app.use(cors())
app.use(express.json())

app.get("/" , (req , res) => {
    res.send("Welcome to ApnaStore website")
})

const array = []
const calculateOrderAmount = (items) => {
  // Replace this constant with a calculation of the order's amount
  // Calculate the order total on the server to prevent
  // people from directly manipulating the amount on the client

  items.map((item ) => {
      const {price , cartQuanity} = item
      let cartItemsAmout = price * cartQuanity
      return array.push(cartItemsAmout)
      
  })
  // let Subtotal = 0
  // array.map((item) => {
  //     return Subtotal += item
  // })
  const totalAmount = array.reduce((a, b) => {
    return a + b;
  }, 0);

  return totalAmount * 100
};

app.post("/create-payment-intent", async (req, res) => {
  const { items , shipping ,  desciption } = req.body;

  // Create a PaymentIntent with the order amount and currency
  const paymentIntent = await stripe.paymentIntents.create({
    amount: calculateOrderAmount(items),
    currency: "INR",
    automatic_payment_methods: {
      enabled: true,
    },
    desciption, 
    shipping : {
         address : {
            line1 : shipping.line1,
            line2 : shipping.line2,
            city : shipping.city,
            country : shipping.country,
            postal_code : shipping.postal_code,
         },
         name : shipping.name,
         phone : shipping.phone
    },
  });

  res.send({
    clientSecret: paymentIntent.client_secret,
  });
});

const PORT = process.env.PORT || 4242
app.listen(PORT, () => console.log(`Node server listening on port ${PORT}!`));