public async Task StartAsync(CancellationToken cancel)
{
while (true)
{
try
{
if (cancel.IsCancellationRequested)
{
return;
}
switch (Phase)
{
case TumblerPhase.InputRegistration:
{
await Global.InitializeConfigAsync();
await Global.InitializeUtxoRefereeAsync();
RoundId++;
Console.WriteLine($"New Round: {RoundId}");
Alices = new ConcurrentHashSet <Alice>();
BlindedOutputs = new ConcurrentHashSet <string>();
await Global.StateMachine.BroadcastPeerRegisteredAsync();
Bobs = new ConcurrentHashSet <Bob>();
await SetDenominationAsync(cancel);
await SetFeesAsync(cancel);
CalculateAnonymitySet();
await BroadcastPhaseChangeAsync();
InputRegistrationStopwatch.Restart();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(cancel, _ctsPhaseCancel.Token))
{
while (Alices.Count < Global.Config.MinimumAnonymitySet)
{
var timeoutTask = Task.Delay(TimeSpan.FromSeconds((int)Global.Config.InputRegistrationPhaseTimeoutInSeconds), cts.Token);
await timeoutTask.ContinueWith(t => { });
if (timeoutTask.Status == TaskStatus.RanToCompletion)
{
AnonymitySet = Math.Max((int)Global.Config.MinimumAnonymitySet, Alices.Count);
}
}
}
InputRegistrationStopwatch.Stop();
if (FallBackRound == false)
{
TimeSpentInInputRegistration = InputRegistrationStopwatch.Elapsed;
}
UpdatePhase(TumblerPhase.ConnectionConfirmation);
break;
}
case TumblerPhase.ConnectionConfirmation:
{
RoundHash = NBitcoinHelpers.HashOutpoints(Alices.SelectMany(x => x.Inputs).Select(x => x.OutPoint));
await BroadcastPhaseChangeAsync();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(cancel, _ctsPhaseCancel.Token))
{
await Task.Delay(TimeSpan.FromSeconds((int)Global.Config.ConnectionConfirmationPhaseTimeoutInSeconds), cts.Token).ContinueWith(t => { });
}
if (Alices.All(x => x.State == AliceState.ConnectionConfirmed))
{
UpdatePhase(TumblerPhase.OutputRegistration);
}
else
{
FallBackRound = true;
UpdatePhase(TumblerPhase.InputRegistration);
}
break;
}
case TumblerPhase.OutputRegistration:
{
await BroadcastPhaseChangeAsync();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(cancel, _ctsPhaseCancel.Token))
{
await Task.Delay(TimeSpan.FromSeconds((int)Global.Config.OutputRegistrationPhaseTimeoutInSeconds), cts.Token).ContinueWith(t => { });
}
// Output registration never falls back
// We don't know which Alice to ban
// Therefore proceed to signing, and whichever Alice doesn't sign ban
UpdatePhase(TumblerPhase.Signing);
break;
}
case TumblerPhase.Signing:
{
BuildCoinJoin();
await BroadcastPhaseChangeAsync();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(cancel, _ctsPhaseCancel.Token))
{
await Task.Delay(TimeSpan.FromSeconds((int)Global.Config.SigningPhaseTimeoutInSeconds), cts.Token).ContinueWith(t => { });
}
if (!FullySignedCoinJoin)
{
FallBackRound = true;
foreach (var alice in Alices)
{
if (alice.State != AliceState.SignedCoinJoin)
{
await Global.UtxoReferee.BanAliceAsync(alice);
}
}
}
UpdatePhase(TumblerPhase.InputRegistration);
CoinJoin = null;
break;
}
default:
{
throw new NotSupportedException("This should never happen");
}
}
}
catch (Exception ex)
{
FallBackRound = true;
UpdatePhase(TumblerPhase.InputRegistration);
Console.WriteLine($"Fallback to InputRegistration, Reason: {nameof(TumblerStateMachine)} exception: {ex}");
}
}
}