public Totp(OtpHashAlgorithm otpHashAlgorithm, int codeSize)
{
_hashAlgorithm = otpHashAlgorithm;
// valid input parameter
if (codeSize <= 0 || codeSize > 10)
{
throw new ArgumentOutOfRangeException(nameof(codeSize), codeSize, "length must between 1 and 9");
}
_codeSize = codeSize;
}
public Totp(OtpHashAlgorithm hashAlgorithm) : this(hashAlgorithm, 6)
{
}
