private void MintBlock(List <Transaction> transactions, Chain chain)
{
var hashes = new HashSet <Hash>(transactions.Select(tx => tx.Hash));
var lastBlockHash = chain.GetLastBlockHash();
var lastBlock = chain.GetBlockByHash(lastBlockHash);
var isFirstBlock = lastBlock == null;
var protocol = (uint)Nexus.GetGovernanceValue(Nexus.RootStorage, Nexus.NexusProtocolVersionTag);
while (hashes.Count > 0)
{
var block = new Block(isFirstBlock ? 1 : (lastBlock.Height + 1), chain.Address, Timestamp.Now, hashes, isFirstBlock ? Hash.Null : lastBlock.Hash, protocol);
try
{
chain.BakeBlock(ref block, ref transactions, MinimumFee, _validatorKeys, Timestamp.Now);
chain.AddBlock(block, transactions, MinimumFee);
}
catch (InvalidTransactionException e)
{
var tx = transactions.First(x => x.Hash == e.Hash);
Interlocked.Decrement(ref _size);
hashes.Remove(e.Hash);
lock (_rejections)
{
_rejections[e.Hash] = e.Message;
}
transactions.Remove(tx);
OnTransactionFailed?.Invoke(tx);
continue;
}
lock (_entries)
{
foreach (var tx in transactions)
{
_pendingSet.Remove(tx.Hash);
}
}
foreach (var tx in transactions)
{
Interlocked.Decrement(ref _size);
OnTransactionCommitted?.Invoke(tx);
}
break;
}
lock (_pendingBlocks)
{
_pendingBlocks.Remove(chain);
}
}
private void MintBlock(List <Transaction> transactions, Chain chain)
{
var hashes = new HashSet <Hash>(transactions.Select(tx => tx.Hash));
var isFirstBlock = chain.LastBlock == null;
while (hashes.Count > 0)
{
var block = new Block(isFirstBlock ? 1 : (chain.LastBlock.Height + 1), chain.Address, Timestamp.Now, hashes, isFirstBlock ? Hash.Null : chain.LastBlock.Hash);
try
{
chain.AddBlock(block, transactions, MinimumFee);
}
catch (InvalidTransactionException e)
{
var tx = transactions.First(x => x.Hash == e.Hash);
Interlocked.Decrement(ref _size);
hashes.Remove(e.Hash);
lock (_rejections)
{
_rejections[e.Hash] = e.Message;
}
transactions.Remove(tx);
OnTransactionFailed?.Invoke(tx);
continue;
}
lock (_entries)
{
foreach (var tx in transactions)
{
_pendingSet.Remove(tx.Hash);
}
}
foreach (var tx in transactions)
{
Interlocked.Decrement(ref _size);
OnTransactionRemoved?.Invoke(tx);
}
break;
}
lock (_pendingBlocks)
{
_pendingBlocks.Remove(chain);
}
}
public OperatingError Execute(Block block, TransactionReceipt receipt, IBlockchainSnapshot snapshot)
{
var transactionRepository = _stateManager.CurrentSnapshot.Transactions;
/* check transaction with this hash in database */
if (transactionRepository.GetTransactionByHash(receipt.Hash) != null)
{
return(OperatingError.AlreadyExists);
}
/* verify transaction */
/* find if verification should be skipped for this transaction */
var indexInCycle = block.Header.Index % StakingContract.CycleDuration;
var cycle = block.Header.Index / StakingContract.CycleDuration;
var isGenesisBlock = block.Header.Index == 0;
var isDistributeCycleRewardsAndPenaltiesTx = IsDistributeCycleRewardsAndPenaltiesTx(block, receipt.Transaction);
var isFinishVrfLotteryTx = IsFinishVrfLotteryTx(block, receipt.Transaction);
var isFinishCycleTx = IsFinishCycleTx(block, receipt.Transaction);
// there are some cases when transaction verification is skipped
// (1) genesis block's transactions
// (2) DistributeCycleRewardsAndPenalties transaction. This transaction is executed during block,
// (a) indexInCycle( = blockHeight % CycleDuration) == AttendanceDetectionDuration (CycleDuration / 10)
// (3) FinishVrfLottery transaction. This transaction is executed during block,
// (a) indexInCycle( = blockHeight % CycleDuration) == VrfSubmissionPhaseDuration (CycleDuration / 2)
// (4) FinishCycle transaction. This transaction is executed during block,
// (a) indexInCycle( = blockHeight % CycleDuration) == 0
// (b) cycle (= blockHeight / cycleDuration) > 0
var canTransactionMissVerification = isGenesisBlock ||
isDistributeCycleRewardsAndPenaltiesTx || isFinishVrfLotteryTx || isFinishCycleTx;
var verifyError = VerifyInternal(receipt, canTransactionMissVerification, HardforkHeights.IsHardfork_9Active(block.Header.Index));
if (verifyError != OperatingError.Ok)
{
return(verifyError);
}
/* maybe we don't need this check, but I'm afraid */
if (!receipt.Transaction.FullHash(receipt.Signature, HardforkHeights.IsHardfork_9Active(block.Header.Index)).Equals(receipt.Hash))
{
return(OperatingError.HashMismatched);
}
/* check transaction nonce */
var nonce = transactionRepository.GetTotalTransactionCount(receipt.Transaction.From);
if (nonce != receipt.Transaction.Nonce)
{
return(OperatingError.InvalidNonce);
}
/* try to persist transaction */
var result = _transactionExecuter.Execute(block, receipt, snapshot);
if (result != OperatingError.Ok)
{
OnTransactionFailed?.Invoke(this, receipt);
return(result);
}
/* finalize transaction state */
OnTransactionExecuted?.Invoke(this, receipt);
return(OperatingError.Ok);
}