public bool SetMetadata(MulticastClue MulticastClue)
{
lock (_lockObject)
{
var now = DateTime.UtcNow;
if (MulticastClue == null ||
MulticastClue.Type == null ||
MulticastClue.Channel == null ||
MulticastClue.Channel.Id.Length == 0 ||
string.IsNullOrWhiteSpace(MulticastClue.Channel.Name) ||
(MulticastClue.CreationTime.ToDateTime() - now).TotalMinutes > 30 ||
MulticastClue.Certificate == null)
{
return(false);
}
if (!_MulticastClues.TryGetValue(MulticastClue.Type, out var dic))
{
dic = new Dictionary <Channel, Dictionary <OmniSignature, HashSet <MulticastClue> > >();
_MulticastClues[MulticastClue.Type] = dic;
}
if (!dic.TryGetValue(MulticastClue.Channel, out var dic2))
{
dic2 = new Dictionary <OmniSignature, HashSet <MulticastClue> >();
dic[MulticastClue.Channel] = dic2;
}
var signature = MulticastClue.Certificate.GetOmniSignature();
if (!dic2.TryGetValue(signature, out var hashset))
{
hashset = new HashSet <MulticastClue>();
dic2[signature] = hashset;
}
if (!hashset.Contains(MulticastClue))
{
if (!MulticastClue.VerifyCertificate())
{
return(false);
}
hashset.Add(MulticastClue);
}
return(true);
}
}
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();
}
}
}
public bool VerifyCertificate()
{
var hub = new Hub();
try
{
var target = new MulticastClue(this.Type, this.Channel, this.CreationTime, this.Clue, this.Hashcash, null);
target.Export(hub.Writer, BufferPool.Shared);
hub.Writer.Complete();
var result = this.Certificate.Verify(hub.Reader.GetSequence());
hub.Reader.Complete();
return(result);
}
finally
{
hub.Reset();
}
}