Poloniex API error using postman

Question

1. Step1-Body
2. Step2-Pre-req script to apply HMACSHA512.
3. Step3-Headers for the POST Request. The hmacd in Step2 is applied to the request as header. I am facing a 403 Forbidden { "error": "Invalid API key/secret pair." } as above. Any suggestions to get the hit the right path is appreciated.

Answer 1

Instead of

var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);
pm.environment.set("hmacd", hashInBase64);

You should use

var hashInHex = CryptoJS.enc.Hex.stringify(hash);
pm.environment.set("hmacd", hashInHex);

As Poloniex uses Hex encoding instead of Base64 encoding for the signature.