I ran into same issue and my code was same as yours basically. I changed to the following (c#) and it finally worked. Weird thing is coinbase pro is only exchange i have had issues with so far with the signature. In any case here is the code that worked for me. Hope this helps. Would have saved me hours
public string ComputeSignature(
HttpMethod httpMethod,
string secret,
double timestamp,
string requestUri,
string contentBody = "")
{
var convertedString = System.Convert.FromBase64String(secret);
var prehash = timestamp.ToString("F0", CultureInfo.InvariantCulture) + httpMethod.ToString().ToUpper() + requestUri + contentBody;
return HashString(prehash, convertedString);
}
private string HashString(string str, byte[] secret)
{
var bytes = Encoding.UTF8.GetBytes(str);
using (var hmaccsha = new HMACSHA256(secret))
{
return System.Convert.ToBase64String(hmaccsha.ComputeHash(bytes));
}
}
I ran into same issue and my code was same as yours basically. I changed to the following (c#) and it finally worked. Weird thing is coinbase pro is only exchange i have had issues with so far with the signature. In any case here is the code that worked for me. Hope this helps. Would have saved me hours
public string ComputeSignature(
HttpMethod httpMethod,
string secret,
double timestamp,
string requestUri,
string contentBody = "")
{
var convertedString = System.Convert.FromBase64String(secret);
var prehash = timestamp.ToString("F0", CultureInfo.InvariantCulture) + httpMethod.ToString().ToUpper() + requestUri + contentBody;
return HashString(prehash, convertedString);
}
private string HashString(string str, byte[] secret)
{
var bytes = Encoding.UTF8.GetBytes(str);
using (var hmaccsha = new HMACSHA256(secret))
{
return System.Convert.ToBase64String(hmaccsha.ComputeHash(bytes));
}
}
