public ServiceBlockGenerator(CoreChain coreChain, ServiceChain serviceChain, MaintainChain maintainChain, ServiceBlock lastBlock)
{
ChainId = serviceChain.ChainId;
_blockInfo = new ServiceBlockInfo(serviceChain);
_coreChain = coreChain;
_serviceChain = serviceChain;
_maintainChain = maintainChain;
_lastBlock = lastBlock;
_chainInfo = coreChain.GetChainInfo(ChainId);
_blockState = _chainInfo.LastState;
}
public ServiceBlock GenerateBlock(short issuer, int revision, long timestamp)
{
if (!IsValid)
{
return(null);
}
var nextTransactionId = Operation.FirstTransactionId;
var blockId = Protocol.GenesisBlockId;
var previousHash = Hash.Empty(Protocol.TransactionHashType);
var lastTransactionHash = Hash.Empty(ValidationOperation.ValidationHashType);
if (_lastBlock != null)
{
blockId = _lastBlock.BlockId + 1;
nextTransactionId = _blockState.LastTransactionId + 1;
previousHash = _lastBlock.BlockHash;
lastTransactionHash = _lastBlock.Items.Last().Validation.Hash;
}
_blockInfo.Sort();
var transactions = new List <ServiceTransaction>();
foreach (var transaction in _blockInfo.Transactions)
{
var accountId = transaction.AccountId;
transaction.MetaData.SetTransactionId(nextTransactionId);
transactions.Add(transaction);
_blockInfo.FeatureGenerator.ProcessTransaction(transaction);
++nextTransactionId;
}
var block = new ServiceBlock(transactions, Protocol.Version, blockId, ChainId, issuer, revision, timestamp, previousHash, lastTransactionHash);
// return a copy of the block and all its transactions
// if we don't do this, transaction ids might change during another generator run and we get invalid ids
return(Block.Restore <ServiceBlock>(block.BlockData));
}
public HashSet <long> CheckBlock(ServiceBlock block)
{
var invalid = new HashSet <long>();
foreach (var transaction in block.Transactions)
{
var result = ConsumeTransaction(transaction, true); // add some extra time when checking blocks
if (result != TransactionResultTypes.Ok)
{
invalid.Add(transaction.TransactionId);
}
}
var newBlock = GenerateBlock(block.Issuer, block.Revision, block.Timestamp);
if (newBlock == null || newBlock.BlockHash != block.BlockHash)
{
if (newBlock != null)
{
var count = newBlock.Items.Count;
for (var i = 0; i < count; i++)
{
var op1 = newBlock.Items[i].Validation;
var op2 = block.Items[i].Validation;
if (op1.Hash != op2.Hash)
{
invalid.Add(block.Items[i].Transaction.TransactionId);
}
}
}
if (invalid.Count <= 0)
{
invalid.Add(Protocol.InvalidBlockId);
}
}
return(invalid);
}