public void Digest(ReadOnlySpan <byte> data, Span <byte> result, params object[] extra)
{
Contract.Requires <ArgumentException>(extra.Length >= 4, $"{nameof(extra)} four extra parameters expected");
Contract.Requires <ArgumentException>(data.Length <= 80, $"{nameof(data)} must be less or equal 80 bytes");
Contract.Requires <ArgumentException>(result.Length >= 32, $"{nameof(result)} must be greater or equal 32 bytes");
var nTime = (uint)(ulong)extra[0];
var networkParams = (BitcoinNetworkParams)extra[3];
var config = configs.GetValue(networkParams, (bnp) => bnp.Extra.SafeExtensionDataAs <OdoCryptConfig>());
var key = nTime - nTime % config.OdoCryptShapeChangeInterval;
fixed(byte *input = data)
{
fixed(byte *output = result)
{
LibMultihash.odocrypt(input, output, (uint)data.Length, key);
}
}
}