/// <summary>
/// Reads a single transaction off the blockchain in sequential order
///
/// thanks
/// https://en.bitcoin.it/wiki/Protocol_specification#block
/// http://james.lab6.com/2012/01/12/bitcoin-285-bytes-that-changed-the-world/
/// https://code.google.com/p/blockchain/source/browse/trunk/BlockChain.h
/// </summary>
public Boolean Read()
{
var newBlock = new BitcoinBlock {
MagicBytes = Dequeue(4)
};
if (BitConverter.ToUInt32(newBlock.MagicBytes, 0) != 3652501241)
{
throw new Exception("Invalid magic number at the start of this block");
}
newBlock.BlockSize = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.BlockFormatVersion = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.PreviousBlockHash = ReverseArray(Dequeue(32));
newBlock.MerkleRoot = ReverseArray(Dequeue(32));
newBlock.TimeStamp = Helper.UnixToDateTime(BitConverter.ToUInt32(Dequeue(4), 0));
newBlock.Bits = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.Nonce = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.TransactionCount = ReadVariableLengthInteger(Dequeue(1));
for (var t = 0; t < newBlock.TransactionCount; t++)
{
var newTransaction = new BitcoinTransaction();
newTransaction.TransactionVersionNumber = BitConverter.ToUInt32(Dequeue(4), 0);
newTransaction.InputCount = ReadVariableLengthInteger(Dequeue(1));
for (var i = 0; i < newTransaction.InputCount; i++)
{
var newInput = new BitcoinInput();
newInput.InputTransactionHash = Dequeue(32);
newInput.InputTransactionIndex = BitConverter.ToUInt32(Dequeue(4), 0);
newInput.ResponseScriptLength = ReadVariableLengthInteger(Dequeue(1));
newInput.ResponseScript = Dequeue((int)newInput.ResponseScriptLength);
newInput.SequenceNumber = BitConverter.ToUInt32(Dequeue(4), 0);
newTransaction.Inputs.Add(newInput);
}
newTransaction.OutputCount = ReadVariableLengthInteger(Dequeue(1));
for (var o = 0; o < newTransaction.OutputCount; o++)
{
var newOutput = new BitcoinOutput();
newOutput.OutputValue = BitConverter.ToUInt64(Dequeue(8), 0);
newOutput.ChallengeScriptLength = ReadVariableLengthInteger(Dequeue(1));
newOutput.ChallengeScript = Dequeue((int)newOutput.ChallengeScriptLength);
newOutput.EcdsaPublickey = ExtractPublicKey(newOutput.ChallengeScript);
newOutput.BitcoinAddress = ComputeBitcoinAddress(newOutput.EcdsaPublickey); // todo: expensive operation, should it be a feature flag?
newTransaction.Outputs.Add(newOutput);
}
newTransaction.LockTime = BitConverter.ToUInt32(Dequeue(4), 0);
newBlock.Transactions.Add(newTransaction);
}
CurrentBlock = newBlock;
return(true);
}
public static void Main(string[] args)
{
string hash = "0ade9b2864672074864c1d509ac427ffdcf16fe983ef6ebe8b0606afd3fb50a4";
BitcoinTransaction transaction = BlockchainAPI.GetTransaction(hash);
Console.WriteLine("Block Number = {0}", transaction.BlockHeight);
BitcoinBlock latestBlock = BlockchainAPI.GetLatestBlock();
Console.WriteLine("LatestBlock = {0}", latestBlock.BlockHeight);
Console.WriteLine("Number of Confirmations = {0}", latestBlock.BlockHeight - transaction.BlockHeight);
Console.ReadLine();
}
private async Task ReadNewBlocksAsync(Func <GetBlockRpcModel, Task> saveTransactions)
{
var hashToImport = await _lastImportendBlockHash.GetAsync();
if (string.IsNullOrEmpty(hashToImport))
{
hashToImport = _firstBlock;
}
var block = await _bitcoinRpc.GetBlockAsync(hashToImport);
while (true)
{
var newBlock = new BitcoinBlock
{
Hash = block.Hash,
Time = block.GetTime(),
Height = block.Height,
Merkleroot = block.Merkleroot,
Nonce = block.Nonce,
Difficulty = block.Difficulty,
Previousblockhash = block.Previousblockhash,
Nextblockhash = block.Nextblockhash,
TotalTransactions = block.Tx.Length
};
//Console.WriteLine("\n block - " + newBlock.Hash + " room block " + newBlock.Height);
await _bitcoinBlockRepository.SaveAsync(newBlock);
await saveTransactions(block);
await _lastImportendBlockHash.SetAsync(block.Hash, block.Height);
if (block.IsLastBlock())
{
//Console.WriteLine("block - " + newBlock.Hash + " room block " + newBlock.Height);
//Console.WriteLine("It was the last block.");
break;
}
block = await _bitcoinRpc.GetBlockAsync(block.Nextblockhash);
}
}
