// Generated private & public keys - configured in Alipay Developer Account
const privateKey = "XXXX"; // Replace with your private key
const publicKey = "XXXX"; // Replace with your public key
// Construct Signature Content
const clientID = "XXXX"; // Replace with your Client ID
node alipay-signature-calc.js
https://aswinkumar4018.medium.com/alipay-signature-generation-using-nodejs-281f86b0d20f