public ContextInformation(BlockResult blockResult, NBitcoin.Consensus consensus)
{
Guard.NotNull(blockResult, nameof(blockResult));
Guard.NotNull(consensus, nameof(consensus));
this.BlockResult = blockResult;
this.Consensus = consensus;
// TODO: adding flags to determine the flow of logic is not ideal
// a refator is in depbate on moving to a consensus rules engine
// this will remove hte need for flags as a validation will
// only use the required rules (i.e if the check pow rule will be ommited form the flow)
this.CheckPow = true;
this.CheckMerkleRoot = true;
this.OnlyCheck = false;
}
public void AcceptBlock(BlockResult result)
{
ContextInformation context;
ConsensusFlags flags;
using (watch.Start(o => Validator.PerformanceCounter.AddBlockProcessingTime(o)))
{
Validator.CheckBlockHeader(result.Block.Header);
if (result.Block.Header.HashPrevBlock != Tip.HashBlock)
{
return; // reorg
}
result.ChainedBlock = new ChainedBlock(result.Block.Header, result.Block.Header.GetHash(), Tip);
result.ChainedBlock = Chain.GetBlock(result.ChainedBlock.HashBlock) ?? result.ChainedBlock;
//Liberate from memory the block created above if possible
context = new ContextInformation(result.ChainedBlock, Validator.ConsensusParams);
Validator.ContextualCheckBlockHeader(result.Block.Header, context);
flags = GetFlags(result.ChainedBlock);
Validator.ContextualCheckBlock(result.Block, flags, context);
Validator.CheckBlock(result.Block);
}
var set = new UnspentOutputSet();
using (watch.Start(o => Validator.PerformanceCounter.AddUTXOFetchingTime(o)))
{
var ids = GetIdsToFetch(result.Block, flags.EnforceBIP30);
var coins = UTXOSet.FetchCoinsAsync(ids).GetAwaiter().GetResult();
set.SetCoins(coins);
}
TryPrefetchAsync(flags);
using (watch.Start(o => Validator.PerformanceCounter.AddBlockProcessingTime(o)))
{
Validator.ExecuteBlock(result.Block, result.ChainedBlock, flags, set, null);
}
UTXOSet.SaveChangesAsync(set.GetCoins(UTXOSet), null, Tip.HashBlock, result.ChainedBlock.HashBlock);
_Tip = result.ChainedBlock;
}
public BlockResult ExecuteNextBlock(CancellationToken cancellationToken)
{
BlockResult result = new BlockResult();
try
{
using (watch.Start(o => Validator.PerformanceCounter.AddBlockFetchingTime(o)))
{
while (true)
{
result.Block = Puller.NextBlock(cancellationToken);
if (result.Block != null)
{
break;
}
else
{
while (true)
{
var hash = UTXOSet.Rewind().GetAwaiter().GetResult();
var rewinded = Chain.GetBlock(hash);
if (rewinded == null)
{
continue;
}
_Tip = rewinded;
Puller.SetLocation(rewinded);
break;
}
}
}
}
this.AcceptBlock(result);
}
catch (ConsensusErrorException ex)
{
result.Error = ex.ConsensusError;
}
return(result);
}