public void Digest(ReadOnlySpan <byte> data, Span <byte> result, params object[] extra)
{
Contract.Requires <ArgumentException>(result.Length >= 32, $"{nameof(result)} must be greater or equal 32 bytes");
fixed(byte *input = data)
{
fixed(byte *output = result)
{
LibMultihash.phi(input, output, (uint)data.Length);
}
}
}