Binance API - Postman prerequest script

prerequest_binance.js

// Binance Futures API - Use this Pre request script in postman to generate the signature and timestamp query string parameters.
// The postman collection can be downloaded from https://github.com/binance/binance-api-postman. Please note that this collection requests have signature and timestamp parameters enabled within each request. Disable in the individual request as this script will properly generate these parameters.
const secret = postman.getEnvironmentVariable("binance-api-secret");
const timestamp = Date.now();

let [,params]=request.url.split("?")
params+= "&timestamp="+timestamp.toString()
const signHash = CryptoJS.HmacSHA256(params, secret);

pm.request.addQueryParams({
    key: 'timestamp',
    value: timestamp.toString()
});

pm.request.addQueryParams({
    key: 'signature',
    value: signHash.toString()
});