public bool VerifyBlock(BlockMsg newBlock)
{
//校验区块的基本信息
var result = VerifyBlockBasic(newBlock);
if (!result)
{
return(false);
}
var txComponent = new TransactionComponent();
var blockComponent = new BlockComponent();
//校验交易信息
var totalFee = 0L;
VerifyTransactionModel model = new VerifyTransactionModel();
model.block = newBlock;
model.localHeight = blockComponent.GetLatestHeight();
foreach (var item in newBlock.Transactions)
{
long fee;
model.transaction = item;
if (txComponent.VerifyTransactionMsg(model, out fee))
{
totalFee += fee;
}
else
{
return(false);
}
}
if (Heights.Contains(newBlock.Header.Height))
{
return(true);
}
var newBlockReward = POC.GetNewBlockReward(newBlock.Header.Height);
var coinbaseAmount = newBlock.Transactions[0].Outputs[0].Amount;
if (coinbaseAmount < 0 || coinbaseAmount != (totalFee + newBlockReward))
{
throw new CommonException(ErrorCode.Engine.Transaction.Verify.COINBASE_OUTPUT_AMOUNT_ERROR);
}
return(true);
}
/// <summary>
/// 创建新的区块
/// </summary>
/// <param name="minerName"></param>
/// <param name="generatorId"></param>
/// <param name="accountId"></param>
/// <returns></returns>
public BlockMsg CreateNewBlock(string minerName, string generatorId, string remark = null, string accountId = null)
{
var accountDac = AccountDac.Default;
var blockDac = BlockDac.Default;
var txDac = TransactionDac.Default;
var txPool = TransactionPool.Instance;
var txComponent = new TransactionComponent();
var transactionMsgs = new List <TransactionMsg>();
long lastBlockHeight = -1;
string lastBlockHash = Base16.Encode(HashHelper.EmptyHash());
long lastBlockBits = -1;
string lastBlockGenerator = null;
//获取最后一个区块
var blockEntity = blockDac.SelectLast();
if (blockEntity != null)
{
lastBlockHeight = blockEntity.Header.Height;
lastBlockHash = blockEntity.Header.Hash;
lastBlockBits = blockEntity.Header.Bits;
lastBlockGenerator = blockEntity.Header.GeneratorId;
}
long totalSize = 0;
long totalInput = 0;
long totalOutput = 0;
long totalAmount = 0;
long totalFee = 0;
long maxSize = Consensus.BlockSetting.MAX_BLOCK_SIZE - (1 * 1024);
//获取待打包的交易
var txs = txPool.GetTxsWithoutRepeatCost(10, maxSize);
var hashIndexs = new List <string>();
foreach (var tx in txs)
{
totalSize += tx.Size;
totalInput += tx.InputCount;
totalOutput += tx.OutputCount;
hashIndexs.AddRange(tx.Inputs.Select(x => $"{x.OutputTransactionHash}_{x.OutputIndex}"));
long totalOutputAmount = tx.Outputs.Sum(x => x.Amount);
totalAmount += totalOutputAmount;
}
var utxos = UtxoSetDac.Default.Get(hashIndexs);
var totalInputAmount = utxos.Sum(x => x.Amount);
totalFee = totalInputAmount - totalAmount;
transactionMsgs.AddRange(txs);
var accounts = AccountDac.Default.SelectAll();
var minerAccount = accounts.OrderBy(x => x.Timestamp).FirstOrDefault();
if (accountId != null)
{
var account = accounts.FirstOrDefault(x => x.Id == accountId);
if (account != null && !string.IsNullOrWhiteSpace(account.PrivateKey))
{
minerAccount = account;
}
}
var minerAccountId = minerAccount.Id;
BlockMsg newBlockMsg = new BlockMsg();
BlockHeaderMsg headerMsg = new BlockHeaderMsg();
headerMsg.Hash = Base16.Encode(HashHelper.EmptyHash());
headerMsg.GeneratorId = generatorId;
newBlockMsg.Header = headerMsg;
headerMsg.Height = lastBlockHeight + 1;
headerMsg.PreviousBlockHash = lastBlockHash;
if (headerMsg.Height == 0)
{
minerAccountId = Consensus.BlockSetting.GenesisBlockReceiver;
remark = Consensus.BlockSetting.GenesisBlockRemark;
}
BlockMsg prevBlockMsg = null;
BlockMsg prevStepBlockMsg = null;
if (blockEntity != null)
{
prevBlockMsg = blockEntity;
}
if (headerMsg.Height >= POC.DIFFIUCLTY_ADJUST_STEP)
{
var prevStepHeight = 0L;
if (!GlobalParameters.IsTestnet && headerMsg.Height <= POC.DIFFICULTY_CALCULATE_LOGIC_ADJUST_HEIGHT)
{
prevStepHeight = headerMsg.Height - POC.DIFFIUCLTY_ADJUST_STEP - 1;
}
else
{
prevStepHeight = headerMsg.Height - POC.DIFFIUCLTY_ADJUST_STEP;
}
prevStepBlockMsg = blockDac.SelectByHeight(prevStepHeight);
}
var newBlockReward = POC.GetNewBlockReward(headerMsg.Height);
headerMsg.Bits = POC.CalculateBaseTarget(headerMsg.Height, prevBlockMsg, prevStepBlockMsg);
headerMsg.TotalTransaction = transactionMsgs.Count + 1;
var coinbaseTxMsg = new TransactionMsg();
coinbaseTxMsg.Timestamp = Time.EpochTime;
coinbaseTxMsg.Locktime = 0;
var coinbaseInputMsg = new InputMsg();
coinbaseTxMsg.Inputs.Add(coinbaseInputMsg);
coinbaseInputMsg.OutputIndex = 0;
coinbaseInputMsg.OutputTransactionHash = Base16.Encode(HashHelper.EmptyHash());
coinbaseInputMsg.UnlockScript = Script.BuildMinerScript(minerName, remark);
coinbaseInputMsg.Size = coinbaseInputMsg.UnlockScript.Length;
var coinbaseOutputMsg = new OutputMsg();
coinbaseTxMsg.Outputs.Add(coinbaseOutputMsg);
coinbaseOutputMsg.Amount = newBlockReward + totalFee;
coinbaseOutputMsg.LockScript = Script.BuildLockScipt(minerAccountId);
coinbaseOutputMsg.Size = coinbaseOutputMsg.LockScript.Length;
coinbaseOutputMsg.Index = 0;
if (newBlockReward < 0 || totalFee < 0 || coinbaseOutputMsg.Amount < 0)
{
LogHelper.Warn($"newBlockReward:{newBlockReward}");
LogHelper.Warn($"totalFee:{totalFee}");
LogHelper.Warn($"coinbaseOutputMsg.Amount:{coinbaseOutputMsg.Amount}");
throw new CommonException(ErrorCode.Engine.Transaction.Verify.COINBASE_OUTPUT_AMOUNT_ERROR);
}
coinbaseTxMsg.Hash = coinbaseTxMsg.GetHash();
newBlockMsg.Transactions.Insert(0, coinbaseTxMsg);
foreach (var tx in transactionMsgs)
{
newBlockMsg.Transactions.Add(tx);
}
headerMsg.PayloadHash = newBlockMsg.GetPayloadHash();
LogHelper.Warn($"{headerMsg.Height}::{headerMsg.PayloadHash}");
LogHelper.Warn($"PayloadHash::{headerMsg.PayloadHash}");
LogHelper.Warn($"BlockSignature::{headerMsg.BlockSignature}");
LogHelper.Warn($"miner::{minerName}");
headerMsg.BlockSignature = Base16.Encode(HashHelper.EmptyHash());
headerMsg.BlockSigSize = headerMsg.BlockSignature.Length;
headerMsg.TotalTransaction = newBlockMsg.Transactions.Count;
return(newBlockMsg);
}