private void AddHeaders( string signedSignature, double timeStamp) { Rest.AddHeader("User-Agent", "GDAXClient"); Rest.AddHeader("CB-ACCESS-KEY", _apiKey); Rest.AddHeader("CB-ACCESS-TIMESTAMP", timeStamp.ToString("F0", CultureInfo.InvariantCulture)); Rest.AddHeader("CB-ACCESS-SIGN", signedSignature); Rest.AddHeader("CB-ACCESS-PASSPHRASE", _apiPassPhrase); }