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 void ProcessUncsonfirmedBlocks() { var blockDac = new BlockDac(); var txDac = new TransactionDac(); var txComponent = new TransactionComponent(); var utxoComponent = new UtxoComponent(); long lastHeight = this.GetLatestHeight(); long confirmedHeight = -1; var confirmedBlock = blockDac.SelectLastConfirmed(); var confirmedHash = Base16.Encode(HashHelper.EmptyHash()); if (confirmedBlock != null) { confirmedHeight = confirmedBlock.Height; confirmedHash = confirmedBlock.Hash; } if (lastHeight - confirmedHeight >= 6) { var blocks = blockDac.SelectByPreviousHash(confirmedHash); if (blocks.Count == 1) { blockDac.UpdateBlockStatusToConfirmed(blocks[0].Hash); this.ProcessUncsonfirmedBlocks(); } else if (blocks.Count > 1) { var countOfDescendants = new Dictionary <string, long>(); foreach (var block in blocks) { var count = blockDac.CountOfDescendants(block.Hash); if (!countOfDescendants.ContainsKey(block.Hash)) { countOfDescendants.Add(block.Hash, count); } } var dicSort = countOfDescendants.OrderBy(d => d.Value).ToList(); var lastItem = blocks.Where(b => b.Hash == dicSort[dicSort.Count - 1].Key).First(); var index = 0; while (index < dicSort.Count - 1) { var currentItem = blocks.Where(b => b.Hash == dicSort[index].Key).First(); if (lastHeight - currentItem.Height >= 6) { var txList = txDac.SelectByBlockHash(currentItem.Hash); //Skip coinbase tx for (int i = 1; i < txList.Count; i++) { var tx = txList[i]; var txMsg = txComponent.ConvertTxEntityToMsg(tx); txComponent.AddTransactionToPool(txMsg); } //remove coinbase from utxo UtxoSet.Instance.RemoveUtxoRecord(txList[0].Hash, 0); blockDac.UpdateBlockStatusToDiscarded(currentItem.Hash); index++; } else { break; } } if (dicSort.Count - index <= 1) { blockDac.UpdateBlockStatusToConfirmed(lastItem.Hash); this.ProcessUncsonfirmedBlocks(); } } } }
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 work = new POW(newBlock.Header.Height); var txComponent = new TransactionComponent(); if (newBlock.Transactions.Count > 0) { var coinbase = newBlock.Transactions[0]; var reward = work.GetNewBlockReward(); var totalFee = 0L; 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 + reward)) { throw new CommonException(ErrorCode.Engine.Transaction.Verify.COINBASE_OUTPUT_AMOUNT_ERROR); } } } var prev4032Block = this.GetBlockMsgByHeight(newBlock.Header.Height - POW.DiffiucltyAdjustStep); long previousBlockHeight = -1; long previousBlockBits = -1; if (previousBlock != null) { previousBlockHeight = previousBlock.Header.Height; previousBlockBits = previousBlock.Header.Bits; } if (work.CalculateNextWorkTarget(previousBlockHeight, previousBlockBits, prev4032Block) != newBlock.Header.Bits) { throw new CommonException(ErrorCode.Engine.Block.Verify.BITS_IS_WRONG); } var hashResult = this.GetMiningWorkResult(newBlock); if (work.Verify(newBlock.Header.Bits, hashResult)) { return(true); } else { throw new CommonException(ErrorCode.Engine.Block.Verify.POW_VERIFY_FAIL); } }