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");
// get nFactor
var ts = ((DateTimeOffset)Clock.Now).ToUnixTimeSeconds();
var n = timetable.First(x => ts >= x.Item2).Item1;
var nFactor = Math.Log(n) / Math.Log(2);
fixed(byte *input = data)
{
fixed(byte *output = result)
{
Multihash.scryptn(input, output, (uint)nFactor, (uint)data.Length);
}
}
}