PaymentFailed: Error: Invalid URI "undefinedPaymentRequest.json"

[ghost]

Hi.

const ZarinpalCheckout = require('zarinpal-checkout')
const zarinpal = ZarinpalCheckout.create(process.env.MERCHENT_CODE, true);
let { userId } = req;
let { amount } = req.body;
let user = await User.findByPk(userId);
console.log(process.env.UI_PAYMENT_CALLBACK); // http://localhost:4000/payments/callback
let response = await zarinpal.PaymentRequest({
  Amount: Number(amount),
  CallbackURL: process.env.UI_PAYMENT_CALLBACK,
  Description: 'شارژ اکانت',
  Email: user.email,
  Mobile: user.phone
}); // this line throw error.

what is my mistake

[ali-tafakkori]

MerchantID اشتباه هست