public async Task <Exception> DivideRounds()
{
logger.Debug("Divide Rounds {UndeterminedEvents}", UndeterminedEvents.Count);
foreach (var hash in UndeterminedEvents)
{
var roundNumber = await Round(hash);
var witness = await Witness(hash);
var(roundInfo, err) = await Store.GetRound(roundNumber);
//If the RoundInfo is not found in the Store's Cache, then the Hashgraph
//is not aware of it yet. We need to add the roundNumber to the queue of
//undecided rounds so that it will be processed in the other consensus
//methods
if (err != null && err.StoreErrorType != StoreErrorType.KeyNotFound)
{
return(err);
}
//If the RoundInfo is actually taken from the Store's DB, then it still
//has not been processed by the Hashgraph consensus methods (The 'queued'
//field is not exported and therefore not persisted in the DB).
//RoundInfos taken from the DB directly will always have this field set
//to false
if (!roundInfo.Queued())
{
logger.Debug("Undetermined Event Queued {hex}", hash);
UndecidedRounds.Enqueue(roundNumber);
roundInfo.SetQueued();
}
roundInfo.AddEvent(hash, witness);
err = await Store.SetRound(roundNumber, roundInfo);
if (err != null)
{
return(err);
}
}
return(null);
}
//assign round received and timestamp to all evs
public async Task <Exception> DecideRoundReceived()
{
foreach (var x in UndeterminedEvents)
{
var r = await Round(x);
for (var i = r + 1; i <= Store.LastRound(); i++)
{
var(tr, err) = await Store.GetRound(i);
if (err != null && err.StoreErrorType != StoreErrorType.KeyNotFound)
{
return(err);
}
//skip if some witnesses are left undecided
if (!(tr.WitnessesDecided() && UndecidedRounds.Peek() > i))
{
continue;
}
var fws = tr.FamousWitnesses();
//set of famous witnesses that see x
var s = new List <string>();
foreach (var w in fws)
{
if (await See(w, x))
{
s.Add(w);
}
}
if (s.Count > fws.Length / 2)
{
var(ex, erre) = await Store.GetEvent(x);
if (erre != null)
{
return(erre);
}
ex.SetRoundReceived(i);
var t = new List <string>();
foreach (var a in s)
{
t.Add(await OldestSelfAncestorToSee(a, x));
}
ex.SetConsensusTimestamp(await MedianTimestamp(t));
await Store.SetEvent(ex);
break;
}
}
}
return(null);
}