Kucoin API - Prerequest script for Postman

prerequest_kucoin.js

// Use this to sign postman requests to the KuCoin API
// The following environmental variables should be set in postman, API_KEY, KUCOIN_URL, PASSPHRASE, API_SECRET
// The requests needs to have the URL like in the example, {{KUCOIN_URL}}/api/v1/sub/user. "{{KUCOIN_URL}}" as-is.
// Kucoin API Key version 2. For version 1, you need to pass plain text of the passphraseHash instead of hash
 
const apiKey = postman.getEnvironmentVariable("API_KEY");
const secret = postman.getEnvironmentVariable("API_SECRET");
const passphrase = postman.getEnvironmentVariable("PASSPHRASE");
const url = postman.getEnvironmentVariable("KUCOIN_URL");

const timestamp = Date.now();

const body = request.body ? request.body : '';
const method = request.method;
const [,endpoint] = request.url.split("{{KUCOIN_URL}}");
const signature = timestamp + method + endpoint + body;
const signHash = CryptoJS.HmacSHA256(signature, secret);
const passphraseHash = CryptoJS.HmacSHA256(passphrase, secret);

pm.request.headers.add({
    key: 'KC-API-KEY',
    value: apiKey
});

pm.request.headers.add({
    key: 'KC-API-SIGN',
    value: signHash.toString(CryptoJS.enc.Base64)
});

pm.request.headers.add({
    key: 'KC-API-TIMESTAMP',
    value: timestamp
});

pm.request.headers.add({
    key: 'KC-API-PASSPHRASE',
    value: passphraseHash.toString(CryptoJS.enc.Base64)
});

pm.request.headers.add({
    key: 'KC-API-KEY-VERSION',
    value: "2"
});