private async Task <TransactionTrace> ExecuteOneAsync(int depth, Transaction transaction, Hash chainId,
IChainContext chainContext, Dictionary <DataPath, StateCache> stateCache,
CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return(new TransactionTrace()
{
TransactionId = transaction.GetHash(),
StdErr = "Execution Canceled",
ExecutionStatus = ExecutionStatus.Canceled
});
}
var trace = new TransactionTrace()
{
TransactionId = transaction.GetHash()
};
var txCtxt = new TransactionContext()
{
PreviousBlockHash = chainContext.BlockHash,
Transaction = transaction,
BlockHeight = chainContext.BlockHeight,
Trace = trace,
CallDepth = depth
};
var executive = await _smartContractService.GetExecutiveAsync(transaction.To, chainId);
try
{
executive.SetDataCache(stateCache);
await executive.SetTransactionContext(txCtxt).Apply();
foreach (var inlineTx in txCtxt.Trace.InlineTransactions)
{
var inlineTrace = await ExecuteOneAsync(depth + 1, inlineTx, chainId, chainContext, stateCache,
cancellationToken);
trace.InlineTraces.Add(inlineTrace);
}
}
catch (Exception ex)
{
txCtxt.Trace.ExecutionStatus = ExecutionStatus.ContractError;
txCtxt.Trace.StdErr += ex + "\n";
}
finally
{
await _smartContractService.PutExecutiveAsync(transaction.To, executive);
}
return(trace);
}
private async Task <List <ulong> > ReadBalancesForAddrs(List <Address> targets, Address tokenContractAddr)
{
List <ulong> res = new List <ulong>();
foreach (var target in targets)
{
Transaction tx = new Transaction()
{
From = target,
To = tokenContractAddr,
IncrementId = 0,
MethodName = "GetBalance",
Params = ByteString.CopyFrom(ParamsPacker.Pack(target)),
};
var txnCtxt = new TransactionContext()
{
Transaction = tx
};
var executive = await _smartContractService.GetExecutiveAsync(tokenContractAddr, ChainId);
try
{
await executive.SetTransactionContext(txnCtxt).Apply();
}
finally
{
await _smartContractService.PutExecutiveAsync(tokenContractAddr, executive);
}
res.Add(txnCtxt.Trace.RetVal.Data.DeserializeToUInt64());
}
return(res);
}
private async Task <BlockValidationResult> DPoSValidation(IBlock block, IChainContext context)
{
// If the height of chain is 1, no need to check consensus validation
if (block.Header.Index < GlobalConfig.GenesisBlockHeight + 2)
{
return(BlockValidationResult.Success);
}
// Get BP address
var uncompressedPrivateKey = block.Header.P.ToByteArray();
var recipientKeyPair = ECKeyPair.FromPublicKey(uncompressedPrivateKey);
var address = recipientKeyPair.GetAddress().DumpHex();
// Get the address of consensus contract
var contractAccountHash =
AddressHelpers.GetSystemContractAddress(context.ChainId, SmartContractType.AElfDPoS.ToString());
var timestampOfBlock = block.Header.Time;
long roundId = 1;
var updateTx =
block.Body.TransactionList.Where(t => t.MethodName == ConsensusBehavior.UpdateAElfDPoS.ToString())
.ToList();
if (updateTx.Count > 0)
{
if (updateTx.Count > 1)
{
return(BlockValidationResult.IncorrectDPoSTxInBlock);
}
roundId = ((Round)ParamsPacker.Unpack(updateTx[0].Params.ToByteArray(),
new[] { typeof(Round), typeof(Round), typeof(StringValue) })[1]).RoundId;
}
//Formulate an Executive and execute a transaction of checking time slot of this block producer
TransactionTrace trace;
var executive = await _smartContractService.GetExecutiveAsync(contractAccountHash, context.ChainId);
try
{
var tx = GetTxToVerifyBlockProducer(contractAccountHash, NodeConfig.Instance.ECKeyPair, address,
timestampOfBlock, roundId);
if (tx == null)
{
return(BlockValidationResult.FailedToCheckConsensusInvalidation);
}
var tc = new TransactionContext
{
Transaction = tx
};
await executive.SetTransactionContext(tc).Apply();
trace = tc.Trace;
}
finally
{
_smartContractService.PutExecutiveAsync(contractAccountHash, executive).Wait();
}
//If failed to execute the transaction of checking time slot
if (!trace.StdErr.IsNullOrEmpty())
{
_logger.Trace("Failed to execute tx Validation: " + trace.StdErr);
return(BlockValidationResult.FailedToCheckConsensusInvalidation);
}
var result = Int32Value.Parser.ParseFrom(trace.RetVal.ToByteArray()).Value;
switch (result)
{
case 1:
return(BlockValidationResult.NotBP);
case 2:
return(BlockValidationResult.InvalidTimeSlot);
case 3:
return(BlockValidationResult.SameWithCurrentRound);
case 11:
return(BlockValidationResult.ParseProblem);
default:
return(BlockValidationResult.Success);
}
}