public IEnumerator CoSwarmRunner()
{
BootstrapStarted?.Invoke(this, null);
var bootstrapTask = Task.Run(async() =>
{
try
{
await _swarm.BootstrapAsync(
_seedPeers,
5000,
5000,
_cancellationTokenSource.Token);
}
catch (Exception e)
{
Debug.LogFormat("Exception occurred during bootstrap {0}", e);
}
});
yield return(new WaitUntil(() => bootstrapTask.IsCompleted));
PreloadStarted?.Invoke(this, null);
Debug.Log("PreloadingStarted event was invoked");
DateTimeOffset started = DateTimeOffset.UtcNow;
long existingBlocks = _blocks?.Tip?.Index ?? 0;
Debug.Log("Preloading starts");
var swarmPreloadTask = Task.Run(async() =>
{
await _swarm.PreloadAsync(
TimeSpan.FromMilliseconds(SwarmDialTimeout),
new Progress <PreloadState>(state =>
PreloadProcessed?.Invoke(this, state)
),
trustedStateValidators: _trustedPeers,
cancellationToken: _cancellationTokenSource.Token
);
});
yield return(new WaitUntil(() => swarmPreloadTask.IsCompleted));
DateTimeOffset ended = DateTimeOffset.UtcNow;
if (swarmPreloadTask.Exception is Exception exc)
{
Debug.LogErrorFormat(
"Preloading terminated with an exception: {0}",
exc
);
throw exc;
}
var index = _blocks?.Tip?.Index ?? 0;
Debug.LogFormat(
"Preloading finished; elapsed time: {0}; blocks: {1}",
ended - started,
index - existingBlocks
);
PreloadEnded?.Invoke(this, null);
var swarmStartTask = Task.Run(async() =>
{
try
{
await _swarm.StartAsync();
}
catch (TaskCanceledException)
{
}
catch (Exception e)
{
Debug.LogErrorFormat(
"Swarm terminated with an exception: {0}",
e
);
throw;
}
});
Task.Run(async() =>
{
await _swarm.WaitForRunningAsync();
Debug.LogFormat(
"The address of this node: {0},{1},{2}",
ByteUtil.Hex(PrivateKey.PublicKey.Format(true)),
_swarm.EndPoint.Host,
_swarm.EndPoint.Port
);
});
yield return(new WaitUntil(() => swarmStartTask.IsCompleted));
}
private async Task StartSwarm(bool preload, CancellationToken cancellationToken)
{
Log.Debug("Starting swarms.");
var peers = Properties.Peers.ToImmutableArray();
Task BootstrapMainSwarmAsync(int depth)
=> Swarm.BootstrapAsync(
peers,
pingSeedTimeout: PingSeedTimeout,
findNeighborsTimeout: FindNeighborsTimeout,
depth: depth,
cancellationToken: cancellationToken
);
if (peers.Any())
{
try
{
// FIXME: It's safe to increase depth.
await BootstrapMainSwarmAsync(1);
BootstrapEnded.Set();
}
catch (PeerDiscoveryException e)
{
Log.Error(e, "Bootstrap failed: {Exception}", e);
if (!IgnoreBootstrapFailure)
{
throw;
}
}
if (preload)
{
await Swarm.PreloadAsync(
TimeSpan.FromSeconds(5),
PreloadProgress,
Properties.TrustedStateValidators,
cancellationToken : cancellationToken
);
PreloadEnded.Set();
}
}
async Task ReconnectToSeedPeers(CancellationToken token)
{
while (!token.IsCancellationRequested)
{
await Task.Delay(BootstrapInterval);
await BootstrapMainSwarmAsync(0).ContinueWith(t =>
{
if (t.IsFaulted)
{
Log.Error(t.Exception, "Periodic bootstrap failed.");
}
});
token.ThrowIfCancellationRequested();
}
}
SwarmCancellationToken = cancellationToken;
try
{
var t = Swarm.StartAsync(
cancellationToken: cancellationToken,
millisecondsBroadcastTxInterval: 15000
);
await Swarm.WaitForRunningAsync();
await SubSwarm.BootstrapAsync(
new [] { Swarm.AsPeer },
PingSeedTimeout,
FindNeighborsTimeout,
1,
cancellationToken);
await await Task.WhenAny(
t,
SubSwarm.StartAsync(
cancellationToken: cancellationToken,
millisecondsBroadcastTxInterval: 15000
),
ReconnectToSeedPeers(cancellationToken)
);
}
catch (Exception e)
{
Log.Error(e, "Unexpected exception occurred during Swarm.StartAsync(). {e}", e);
}
}