public bool VerifyBlock(BlockMsg newBlock)
{
if (this.exists(newBlock.Header.Hash))
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_HAS_BEEN_EXISTED);
}
if (newBlock.Header.Hash != newBlock.Header.GetHash())
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_HASH_ERROR);
}
var blockComponent = new BlockComponent();
var previousBlock = this.GetBlockMsgByHash(newBlock.Header.PreviousBlockHash);
if (newBlock.Header.Height > 0 && previousBlock == null)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.PREV_BLOCK_NOT_EXISTED);
}
if ((newBlock.Header.Timestamp > Time.EpochTime && (newBlock.Header.Timestamp - Time.EpochTime) > 2 * 60 * 60 * 1000) ||
(previousBlock != null && newBlock.Header.Timestamp <= previousBlock.Header.Timestamp))
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_TIME_IS_ERROR);
}
if (newBlock.Serialize().Length > BlockSetting.MAX_BLOCK_SIZE)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_SIZE_LARGE_THAN_LIMIT);
}
var txComponent = new TransactionComponent();
var newBlockReward = POC.GetNewBlockReward(newBlock.Header.Height);
var prevStepBlock = GetBlockMsgByHeight(newBlock.Header.Height - POC.DIFFIUCLTY_ADJUST_STEP - 1);
var minerInfo = string.Empty;
if (newBlock.Transactions.Count > 0)
{
var coinbase = newBlock.Transactions[0];
var totalFee = 0L;
minerInfo = Encoding.UTF8.GetString(Base16.Decode(coinbase.Inputs[0].UnlockScript)).Split("`")[0];
if (newBlock.Transactions.Count > 1)
{
for (int i = 1; i < newBlock.Transactions.Count; i++)
{
long fee;
if (txComponent.VerifyTransaction(newBlock.Transactions[i], out fee))
{
totalFee += fee;
}
else
{
return(false);
}
}
}
if (coinbase.Inputs.Count != 1 || coinbase.Outputs.Count != 1 || coinbase.Inputs[0].OutputTransactionHash != Base16.Encode(HashHelper.EmptyHash()))
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.COINBASE_FORMAT_ERROR);
}
else
{
var output = coinbase.Outputs[0];
if (output.Amount > BlockSetting.OUTPUT_AMOUNT_MAX)
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.OUTPUT_EXCEEDED_THE_LIMIT);
}
if (!Script.VerifyLockScriptFormat(output.LockScript))
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.SCRIPT_FORMAT_ERROR);
}
if (output.Amount != (totalFee + newBlockReward))
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.COINBASE_OUTPUT_AMOUNT_ERROR);
}
}
}
var pool = new MiningPoolComponent().GetMiningPoolByName(minerInfo);
if (pool == null)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.MINING_POOL_NOT_EXISTED);
}
if (!POC.VerifyBlockSignature(newBlock.Header.PayloadHash, newBlock.Header.BlockSignature, pool.PublicKey))
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_SIGNATURE_IS_ERROR);
}
long previousBlockHeight = -1;
long previousBlockBits = -1;
if (previousBlock != null)
{
previousBlockHeight = previousBlock.Header.Height;
previousBlockBits = previousBlock.Header.Bits;
}
if (POC.CalculateBaseTarget(newBlock.Header.Height, previousBlock, prevStepBlock) != newBlock.Header.Bits)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BITS_IS_WRONG);
}
var targetResult = POC.CalculateTargetResult(newBlock);
if (POC.Verify(newBlock.Header.Bits, targetResult))
{
return(true);
}
else
{
throw new CommonException(ErrorCode.Engine.Block.Verify.POC_VERIFY_FAIL);
}
}
public bool VerifyBlockBasic(BlockMsg newBlock)
{
if (newBlock.Header.Hash != newBlock.Header.GetHash())
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_HASH_ERROR);
}
bool hasPreviousBlock = false;
long previousBlockTimestamp = -1;
long previousBlockBits = -1;
long previousBlockHeight = newBlock.Header.Height - 1;
var cacheBlockKey = $"{newBlock.Header.Hash}_{newBlock.Header.Height - 1}";
var previousBlockMsg = BlockDac.Default.SelectByHash(newBlock.Header.PreviousBlockHash);
if (previousBlockMsg != null)
{
hasPreviousBlock = true;
previousBlockTimestamp = previousBlockMsg.Header.Timestamp;
previousBlockBits = previousBlockMsg.Header.Bits;
}
else
{
var previousBlock = BlockDac.Default.SelectByHash(newBlock.Header.PreviousBlockHash);
hasPreviousBlock = previousBlock != null;
if (hasPreviousBlock)
{
previousBlockTimestamp = previousBlock.Header.Timestamp;
previousBlockBits = previousBlock.Header.Bits;
}
}
if (newBlock.Header.Height > 0 && !hasPreviousBlock)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.PREV_BLOCK_NOT_EXISTED);
}
if ((newBlock.Header.Timestamp - Time.EpochTime) > 2 * 60 * 60 * 1000 ||
(hasPreviousBlock && newBlock.Header.Timestamp <= previousBlockTimestamp))
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_TIME_IS_ERROR);
}
if (newBlock.Serialize().Length > Consensus.BlockSetting.MAX_BLOCK_SIZE)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_SIZE_LARGE_THAN_LIMIT);
}
BlockMsg prevStepBlock = null;
if (newBlock.Header.Height >= POC.DIFFIUCLTY_ADJUST_STEP)
{
var prevStepHeight = 0L;
if (!GlobalParameters.IsTestnet &&
newBlock.Header.Height <= POC.DIFFICULTY_CALCULATE_LOGIC_ADJUST_HEIGHT)
{
prevStepHeight = newBlock.Header.Height - POC.DIFFIUCLTY_ADJUST_STEP - 1;
}
else
{
prevStepHeight = newBlock.Header.Height - POC.DIFFIUCLTY_ADJUST_STEP;
}
prevStepBlock = BlockDac.Default.SelectByHeight(prevStepHeight);
}
//区块必须包含交易，否则错误
if (newBlock.Transactions == null || newBlock.Transactions.Count == 0)
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.NOT_FOUND_COINBASE);
}
//第一个一定是coinbase,奖励+手续费
var coinbase = newBlock.Transactions[0];
//校验打包区块的矿池是否经过验证
var minerInfo = Encoding.UTF8.GetString(Base16.Decode(coinbase.Inputs[0].UnlockScript)).Split("`")[0];
var pool = MiningPoolComponent.CurrentMiningPools.FirstOrDefault(x => x.Name == minerInfo);
if (pool == null)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.MINING_POOL_NOT_EXISTED);
}
//校验区块的签名信息
if (!POC.VerifyBlockSignature(newBlock.Header.PayloadHash, newBlock.Header.BlockSignature, pool.PublicKey))
{
LogHelper.Warn($"PayloadHash::{newBlock.Header.PayloadHash}");
LogHelper.Warn($"BlockSignature::{newBlock.Header.BlockSignature}");
LogHelper.Warn($"PublicKey::{pool.PublicKey}");
throw new CommonException(ErrorCode.Engine.Block.Verify.BLOCK_SIGNATURE_IS_ERROR);
}
if (POC.CalculateBaseTarget(newBlock.Header.Height, previousBlockBits, previousBlockTimestamp,
prevStepBlock) != newBlock.Header.Bits)
{
throw new CommonException(ErrorCode.Engine.Block.Verify.BITS_IS_WRONG);
}
var targetResult = POC.CalculateTargetResult(newBlock);
if (newBlock.Header.Height == 17687 || POC.Verify(newBlock.Header.Bits, targetResult))
{
return(true);
}
else
{
throw new CommonException(ErrorCode.Engine.Block.Verify.POC_VERIFY_FAIL);
}
}
