public static uint Verify(OmniHashcash hashcash, ReadOnlySequence <byte> sequence, ReadOnlyMemory <byte> key)
{
if (hashcash is null)
{
throw new ArgumentNullException(nameof(hashcash));
}
if (hashcash.AlgorithmType == OmniHashcashAlgorithmType.Sha2_256)
{
var target = Hmac_Sha2_256.ComputeHash(sequence, key.Span);
return(MinerHelper.Verify_Simple_Sha2_256(hashcash.Key.Span, target));
}
return(0);
}
public static async ValueTask <MulticastClue> Create(string type, Channel channel, Timestamp creationTime, Clue clue, OmniDigitalSignature digitalSignature, int miningLimit, TimeSpan miningTimeout, CancellationToken token)
{
OmniHashcash hashcash = null;
{
var hub = new Hub();
try
{
var target = new MulticastClue(type, channel, creationTime, clue, null, null);
target.Export(hub.Writer, BufferPool.Shared);
hub.Writer.Complete();
hashcash = await OmniMiner.Create(hub.Reader.GetSequence(), _utf8Encoding.Value.GetBytes(digitalSignature.GetOmniSignature().ToString()), OmniHashcashAlgorithmType.Sha2_256, miningLimit, miningTimeout, token);
hub.Reader.Complete();
}
finally
{
hub.Reset();
}
}
{
var hub = new Hub();
try
{
var target = new MulticastClue(type, channel, creationTime, clue, hashcash, null);
target.Export(hub.Writer, BufferPool.Shared);
hub.Writer.Complete();
var certificate = OmniCertificate.Create(digitalSignature, hub.Reader.GetSequence());
hub.Reader.Complete();
return(new MulticastClue(type, channel, creationTime, clue, hashcash, certificate));
}
finally
{
hub.Reset();
}
}
}