public override void Start()
{
this.dBreezeCoinView.Initialize().GetAwaiter().GetResult();
var cache = this.coinView as CachedCoinView;
if (cache != null)
{
cache.MaxItems = this.nodeSettings.Cache.MaxItems;
}
this.consensusLoop.Initialize();
this.chainState.HighestValidatedPoW = this.consensusLoop.Tip;
this.connectionManager.Parameters.TemplateBehaviors.Add(new BlockPuller.BlockPullerBehavior(blockPuller));
var flags = this.consensusLoop.GetFlags();
if (flags.ScriptFlags.HasFlag(ScriptVerify.Witness))
{
connectionManager.AddDiscoveredNodesRequirement(NodeServices.NODE_WITNESS);
}
this.stakeChain?.Load().GetAwaiter().GetResult();
new Thread(RunLoop)
{
Name = "Consensus Loop"
}.Start();
}
void RunLoop()
{
try
{
var stack = new CoinViewStack(CoinView);
var cache = stack.Find <CachedCoinView>();
var stats = new ConsensusStats(this, stack);
var cancellationToken = this.GlobalCancellation.Cancellation.Token;
ChainedBlock lastTip = ConsensusLoop.Tip;
foreach (var block in ConsensusLoop.Execute(cancellationToken))
{
bool reorg = false;
if (ConsensusLoop.Tip.FindFork(lastTip) != lastTip)
{
reorg = true;
Logs.FullNode.LogInformation("Reorg detected, rewinding from " + lastTip.Height + " (" + lastTip.HashBlock + ") to " + ConsensusLoop.Tip.Height + " (" + ConsensusLoop.Tip.HashBlock + ")");
}
lastTip = ConsensusLoop.Tip;
cancellationToken.ThrowIfCancellationRequested();
if (block.Error != null)
{
Logs.FullNode.LogError("Block rejected: " + block.Error.Message);
//Pull again
ConsensusLoop.Puller.SetLocation(ConsensusLoop.Tip);
if (block.Error == ConsensusErrors.BadWitnessNonceSize)
{
Logs.FullNode.LogInformation("You probably need witness information, activating witness requirement for peers.");
ConnectionManager.AddDiscoveredNodesRequirement(NodeServices.NODE_WITNESS);
ConsensusLoop.Puller.RequestOptions(TransactionOptions.Witness);
continue;
}
//Set the PoW chain back to ConsensusLoop.Tip
Chain.SetTip(ConsensusLoop.Tip);
//Since ChainBehavior check PoW, MarkBlockInvalid can't be spammed
Logs.FullNode.LogError("Marking block as invalid");
_ChainBehaviorState.MarkBlockInvalid(block.ChainedBlock.HashBlock);
}
if (!reorg && block.Error == null)
{
_ChainBehaviorState.HighestValidatedPoW = ConsensusLoop.Tip;
if (Chain.Tip.HashBlock == block.ChainedBlock?.HashBlock)
{
var unused = cache.FlushAsync();
}
this.Signals.Blocks.Broadcast(block.Block);
}
// TODO: replace this with a signalling object
if (stats.CanLog)
{
stats.Log();
}
}
}
catch (Exception ex) //TODO: Barbaric clean exit
{
if (ex is OperationCanceledException)
{
if (this.GlobalCancellation.Cancellation.IsCancellationRequested)
{
return;
}
}
if (!IsDisposed)
{
Logs.FullNode.LogCritical(new EventId(0), ex, "Consensus loop unhandled exception (Tip:" + ConsensusLoop.Tip?.Height + ")");
_UncatchedException = ex;
Dispose();
}
}
}
public void Start()
{
if (IsDisposed)
{
throw new ObjectDisposedException("FullNode");
}
_IsStarted.Reset();
// start all the features defined
this.StartFeatures();
// == RPC == // todo: add an RPC feature
if (_Settings.RPC != null)
{
RPCHost = new WebHostBuilder()
.UseKestrel()
.ForFullNode(this)
.UseUrls(_Settings.RPC.GetUrls())
.UseIISIntegration()
.UseStartup <RPC.Startup>()
.Build();
RPCHost.Start();
_Resources.Add(RPCHost);
Logs.RPC.LogInformation("RPC Server listening on: " + Environment.NewLine + String.Join(Environment.NewLine, _Settings.RPC.GetUrls()));
}
// === Consensus ===
var coinviewdb = this.Services.ServiceProvider.GetService <DBreezeCoinView>(); // DBreezeCoinView will be in the constructor of a feature
coinviewdb.Initialize(this.Network.GetGenesis()).GetAwaiter().GetResult();
var blockPuller = new LookaheadBlockPuller(Chain, ConnectionManager.ConnectedNodes);
ConnectionManager.Parameters.TemplateBehaviors.Add(new BlockPuller.BlockPullerBehavior(blockPuller));
var consensusValidator = this.Services.ServiceProvider.GetService <ConsensusValidator>(); // new ConsensusValidator(Network.Consensus);
ConsensusLoop = new ConsensusLoop(consensusValidator, Chain, CoinView, blockPuller);
this._ChainBehaviorState.HighestValidatedPoW = ConsensusLoop.Tip;
// === Miner ===
this.Miner = new Mining(this, this.DateTimeProvider);
var flags = ConsensusLoop.GetFlags();
if (flags.ScriptFlags.HasFlag(ScriptVerify.Witness))
{
ConnectionManager.AddDiscoveredNodesRequirement(NodeServices.NODE_WITNESS);
}
// add disposables (TODO: move this to the consensus feature)
this.Resources.Add(coinviewdb);
_ChainBehaviorState.HighestValidatedPoW = ConsensusLoop.Tip;
ConnectionManager.Start();
new Thread(RunLoop)
{
Name = "Consensus Loop"
}.Start();
_IsStarted.Set();
this.StartPeriodicLog();
}
