//Check whether output has been spent or contained in another transaction, true = spent, false = unspent
private bool checkOutputSpent(string currentTxHash, string outputTxHash, int outputIndex)
{
var outputDac = new OutputDac();
var inputDac = new InputDac();
var txDac = new TransactionDac();
var blockDac = new BlockDac();
var outputEntity = outputDac.SelectByHashAndIndex(outputTxHash, outputIndex);
var inputEntity = inputDac.SelectByOutputHash(outputTxHash, outputIndex);
if (inputEntity != null && inputEntity.TransactionHash != currentTxHash)
{
var tx = txDac.SelectByHash(inputEntity.TransactionHash);
if (tx != null)
{
var blockEntity = blockDac.SelectByHash(tx.BlockHash);
if (blockEntity != null && blockEntity.IsVerified)
{
return(true);
}
}
}
return(false);
}
public void RefreshUtxoSet(string accountId)
{
var outputDac = new OutputDac();
var accountDac = new AccountDac();
var txDac = new TransactionDac();
var account = accountDac.SelectById(accountId);
if (account != null && UtxoSet.Instance != null)
{
var set = UtxoSet.Instance.GetUtxoSetByAccountId(accountId);
if (set != null)
{
set.Clear();
//load from database
var outputsInDB = outputDac.SelectUnspentByReceiverId(accountId);
foreach (var output in outputsInDB)
{
var msg = new UtxoMsg();
msg.AccountId = output.ReceiverId;
msg.TransactionHash = output.TransactionHash;
msg.OutputIndex = output.Index;
msg.Amount = output.Amount;
msg.IsConfirmed = true;
msg.IsWatchedOnly = account.WatchedOnly;
var txEntity = txDac.SelectByHash(output.TransactionHash);
msg.BlockHash = txEntity != null ? txEntity.BlockHash : null;
set.Add(msg);
}
//load from transaction pool
var outputsInTxPool = TransactionPool.Instance.GetTransactionOutputsByAccountId(accountId);
foreach (var txHash in outputsInTxPool.Keys)
{
foreach (var output in outputsInTxPool[txHash])
{
var msg = new UtxoMsg();
msg.AccountId = accountId;
msg.TransactionHash = txHash;
msg.OutputIndex = output.Index;
msg.Amount = output.Amount;
msg.IsConfirmed = false;
msg.IsWatchedOnly = account.WatchedOnly;
set.Add(msg);
}
}
}
}
}
/// <summary>
/// 估算交易费率
/// </summary>
/// <returns></returns>
public long EstimateSmartFee()
{
//对象初始化
var txDac = new TransactionDac();
var transactionMsgs = new List <TransactionMsg>();
var txPool = TransactionPool.Instance;
long totalSize = 0;
long totalFee = 0;
//设置最大上限
long maxSize = BlockSetting.MAX_BLOCK_SIZE - (1 * 1024);
//交易池中的项目按照费率从高到低排列
List <TransactionPoolItem> poolItemList = txPool.MainPool.OrderByDescending(t => t.FeeRate).ToList();
var index = 0;
while (totalSize < maxSize && index < poolItemList.Count)
{
//获取totalFee和totalSize
TransactionMsg tx = poolItemList[index].Transaction;
//判断交易Hash是否在交易Msg中
if (tx != null && transactionMsgs.Where(t => t.Hash == tx.Hash).Count() == 0)
{
totalFee += Convert.ToInt64(poolItemList[index].FeeRate * tx.Serialize().LongLength / 1024.0);
if (txDac.SelectByHash(tx.Hash) == null)
{
transactionMsgs.Add(tx);
totalSize += tx.Size;
}
else
{
txPool.RemoveTransaction(tx.Hash);
}
}
/*
* else
* {
* break;
* }
*/
index++;
}
//获取费率
if (poolItemList.Count == 0)
{
return(1024);
}
long feeRate = Convert.ToInt64(Math.Ceiling((totalFee / (totalSize / 1024.0)) / poolItemList.Count));
if (feeRate < 1024)
{
feeRate = 1024;
}
return(feeRate);
}
public TransactionMsg GetTransactionMsgByHash(string txHash)
{
var txDac = new TransactionDac();
var entity = txDac.SelectByHash(txHash);
if (entity != null)
{
return(this.ConvertTxEntityToMsg(entity));
}
else
{
return(TransactionPool.Instance.GetTransactionByHash(txHash));
}
}
public TransactionMsg GetTransactionMsgFromDB(string txHash, out string blockHash)
{
var txDac = new TransactionDac();
var entity = txDac.SelectByHash(txHash);
blockHash = null;
if (entity != null)
{
blockHash = entity.BlockHash;
return(this.ConvertTxEntityToMsg(entity));
}
else
{
return(null);
}
}
public bool CheckTxExisted(string txHash)
{
var dac = new TransactionDac();
if (dac.SelectByHash(txHash) != null)
{
return(true);
}
else
{
var hashes = this.GetAllHashesFromPool();
if (hashes.Contains(txHash))
{
return(true);
}
else
{
return(false);
}
}
}
//public List<UtxoMsg> GetAllConfirmedOutputs()
//{
// return UtxoSet.Instance.GetAllUnspentOutputs();
//}
public List <UtxoMsg> GetAllConfirmedOutputs()
{
List <UtxoMsg> utxoMsgs = new List <UtxoMsg>();
var outputDac = new OutputDac();
var txDac = new TransactionDac();
var blockDac = new BlockDac();
var accountDac = new AccountDac();
var lastHeight = -1L;
var lastBlock = blockDac.SelectLast();
if (lastBlock != null)
{
lastHeight = lastBlock.Height;
}
var outputs = outputDac.SelectAllUnspentOutputs();
foreach (var output in outputs)
{
var msg = new UtxoMsg();
msg.AccountId = output.ReceiverId;
msg.TransactionHash = output.TransactionHash;
msg.OutputIndex = output.Index;
msg.Amount = output.Amount;
msg.IsConfirmed = true;
var account = accountDac.SelectById(msg.AccountId);
msg.IsWatchedOnly = account.WatchedOnly;
var txEntity = txDac.SelectByHash(output.TransactionHash);
msg.BlockHash = txEntity != null ? txEntity.BlockHash : null;
utxoMsgs.Add(msg);
}
return(utxoMsgs);
}
/// <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 = new AccountDac();
var blockDac = new BlockDac();
var outputDac = new OutputDac();
var txDac = new TransactionDac();
var txPool = TransactionPool.Instance;
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.Height;
lastBlockHash = blockEntity.Hash;
lastBlockBits = blockEntity.Bits;
lastBlockGenerator = blockEntity.GeneratorId;
}
long totalSize = 0;
long maxSize = BlockSetting.MAX_BLOCK_SIZE - (1 * 1024);
var poolItemList = txPool.MainPool.OrderByDescending(t => t.FeeRate).ToList();
var index = 0;
while (totalSize < maxSize && index < poolItemList.Count)
{
var tx = poolItemList[index].Transaction;
if (tx != null && transactionMsgs.Where(t => t.Hash == tx.Hash).Count() == 0)
{
if (txDac.SelectByHash(tx.Hash) == null)
{
transactionMsgs.Add(tx);
totalSize += tx.Size;
}
else
{
txPool.RemoveTransaction(tx.Hash);
}
}
else
{
break;
}
index++;
}
var minerAccount = accountDac.SelectDefaultAccount();
if (accountId != null)
{
var account = accountDac.SelectById(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 = BlockSetting.GenesisBlockReceiver;
remark = BlockSetting.GenesisBlockRemark;
}
long totalAmount = 0;
long totalFee = 0;
foreach (var tx in transactionMsgs)
{
long totalInputsAmount = 0L;
long totalOutputAmount = 0L;
foreach (var input in tx.Inputs)
{
var utxo = outputDac.SelectByHashAndIndex(input.OutputTransactionHash, input.OutputIndex);
if (utxo != null)
{
totalInputsAmount += utxo.Amount;
}
}
foreach (var output in tx.Outputs)
{
totalOutputAmount += output.Amount;
}
totalAmount += totalOutputAmount;
totalFee += (totalInputsAmount - totalOutputAmount);
}
//var work = new POW(headerMsg.Height);
BlockMsg prevBlockMsg = null;
BlockMsg prevStepBlockMsg = null;
if (blockEntity != null)
{
prevBlockMsg = this.convertEntityToBlockMsg(blockEntity);
}
if (headerMsg.Height >= POC.DIFFIUCLTY_ADJUST_STEP)
{
prevStepBlockMsg = this.GetBlockMsgByHeight(headerMsg.Height - POC.DIFFIUCLTY_ADJUST_STEP - 1);
}
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;
coinbaseTxMsg.Hash = coinbaseTxMsg.GetHash();
newBlockMsg.Transactions.Insert(0, coinbaseTxMsg);
foreach (var tx in transactionMsgs)
{
newBlockMsg.Transactions.Add(tx);
}
headerMsg.PayloadHash = newBlockMsg.GetPayloadHash();
var dsa = ECDsa.ImportPrivateKey(Base16.Decode(minerAccount.PrivateKey));
var signResult = dsa.SingnData(Base16.Decode(headerMsg.PayloadHash));
headerMsg.BlockSignature = Base16.Encode(signResult);
headerMsg.BlockSigSize = headerMsg.BlockSignature.Length;
headerMsg.TotalTransaction = newBlockMsg.Transactions.Count;
return(newBlockMsg);
}
public void GetBalanceInDB(out long confirmedBalance, out long unconfirmedBalance)
{
//return new OutputDac().SumSelfUnspentOutputs();
confirmedBalance = 0;
unconfirmedBalance = 0;
var outputDac = new OutputDac();
var txDac = new TransactionDac();
var blockDac = new BlockDac();
var lastHeight = -1L;
var lastBlock = blockDac.SelectLast();
if (lastBlock != null)
{
lastHeight = lastBlock.Height;
}
var outputs = outputDac.SelectAllUnspentOutputs();
foreach (var output in outputs)
{
var tx = txDac.SelectByHash(output.TransactionHash);
if (tx != null)
{
var block = blockDac.SelectByHash(tx.BlockHash);
if (block != null)
{
if (tx.TotalInput == 0)
{
//coinbase
if (lastHeight - block.Height >= 100)
{
confirmedBalance += output.Amount;
}
else
{
unconfirmedBalance += output.Amount;
}
}
else
{
if (block.IsVerified)
{
if (Time.EpochTime >= tx.LockTime)
{
confirmedBalance += output.Amount;
}
else
{
unconfirmedBalance += output.Amount;
}
}
else
{
unconfirmedBalance += output.Amount;
}
}
}
}
}
}
public BlockMsg CreateNewBlock(string minerName, string accountId = null)
{
var accountDac = new AccountDac();
var blockDac = new BlockDac();
var outputDac = new OutputDac();
var txDac = new TransactionDac();
var txPool = TransactionPool.Instance;
var transactionMsgs = new List <TransactionMsg>();
long lastBlockHeight = -1;
string lastBlockHash = Base16.Encode(HashHelper.EmptyHash());
long lastBlockBits = -1;
var blockEntity = blockDac.SelectLast();
if (blockEntity != null)
{
lastBlockHeight = blockEntity.Height;
lastBlockHash = blockEntity.Hash;
lastBlockBits = blockEntity.Bits;
}
long totalSize = 0;
long maxSize = BlockSetting.MAX_BLOCK_SIZE - (500 * 1024);
var poolItemList = txPool.MainPool.OrderByDescending(t => t.FeeRate).ToList();
var index = 0;
while (totalSize < maxSize && index < poolItemList.Count)
{
var tx = poolItemList[index].Transaction;
if (tx != null && transactionMsgs.Where(t => t.Hash == tx.Hash).Count() == 0)
{
if (txDac.SelectByHash(tx.Hash) == null)
{
transactionMsgs.Add(tx);
totalSize += tx.Size;
}
else
{
txPool.RemoveTransaction(tx.Hash);
}
}
else
{
break;
}
index++;
}
var minerAccount = accountDac.SelectDefaultAccount();
if (accountId != null)
{
var account = accountDac.SelectById(accountId);
if (account != null && !string.IsNullOrWhiteSpace(account.PrivateKey))
{
minerAccount = account;
}
}
BlockMsg newBlockMsg = new BlockMsg();
BlockHeaderMsg headerMsg = new BlockHeaderMsg();
newBlockMsg.Header = headerMsg;
headerMsg.Height = lastBlockHeight + 1;
headerMsg.PreviousBlockHash = lastBlockHash;
long totalAmount = 0;
long totalFee = 0;
foreach (var tx in transactionMsgs)
{
long totalInputsAmount = 0L;
long totalOutputAmount = 0L;
foreach (var input in tx.Inputs)
{
var utxo = outputDac.SelectByHashAndIndex(input.OutputTransactionHash, input.OutputIndex);
if (utxo != null)
{
totalInputsAmount += utxo.Amount;
}
}
foreach (var output in tx.Outputs)
{
totalOutputAmount += output.Amount;
}
totalAmount += totalOutputAmount;
totalFee += (totalInputsAmount - totalOutputAmount);
}
var work = new POW(headerMsg.Height);
BlockMsg previous4032Block = null;
if (headerMsg.Height > POW.DiffiucltyAdjustStep)
{
previous4032Block = this.GetBlockMsgByHeight(headerMsg.Height - POW.DiffiucltyAdjustStep);
}
var newBlockReward = work.GetNewBlockReward();
headerMsg.Bits = work.CalculateNextWorkTarget(lastBlockHeight, lastBlockBits, previous4032Block);
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);
coinbaseInputMsg.Size = coinbaseInputMsg.UnlockScript.Length;
var coinbaseOutputMsg = new OutputMsg();
coinbaseTxMsg.Outputs.Add(coinbaseOutputMsg);
coinbaseOutputMsg.Amount = newBlockReward + totalFee;
coinbaseOutputMsg.LockScript = Script.BuildLockScipt(minerAccount.Id);
coinbaseOutputMsg.Size = coinbaseOutputMsg.LockScript.Length;
coinbaseOutputMsg.Index = 0;
coinbaseTxMsg.Hash = coinbaseTxMsg.GetHash();
newBlockMsg.Transactions.Insert(0, coinbaseTxMsg);
foreach (var tx in transactionMsgs)
{
newBlockMsg.Transactions.Add(tx);
}
return(newBlockMsg);
}