public static UnspentOutput Create(StoredBlock block, Tx transaction, int outputNumber)
{
TxOut output = transaction.Outputs[outputNumber];
return new UnspentOutput(
block.Height,
CryptoUtils.DoubleSha256(BitcoinStreamWriter.GetBytes(transaction.Write)),
outputNumber,
output.Value,
output.PubkeyScript);
}
private static bool IsValidCoinbaseTransaction(Tx transaction)
{
if (transaction.Inputs.Length != 1)
{
return false;
}
TxIn input = transaction.Inputs[0];
if (input.PreviousOutput.Hash.Any(b => b != 0) || input.PreviousOutput.Index != -1)
{
return false;
}
if (input.SignatureScript == null)
{
return false;
}
//todo: use network settings?
return input.SignatureScript.Length >= 2 && input.SignatureScript.Length <= 100;
}
/// <summary>
/// Calculates hash of Merkle tree root for a given array of transactions.
/// </summary>
/// <param name="transactions">The array of transactions.</param>
/// <exception cref="ArgumentException">If the array of transactions is null or empty.</exception>
public static byte[] GetTreeRoot(Tx[] transactions)
{
if (transactions == null || transactions.Length == 0)
{
throw new ArgumentException($"{nameof(transactions)} array is null or empty.");
}
if (transactions == null || transactions.Length == 0)
{
throw new ArgumentException($"{nameof(transactions)} array is null or empty.");
}
List<byte[]> hashes = new List<byte[]>(transactions.Length);
foreach (Tx transaction in transactions)
{
hashes.Add(CryptoUtils.DoubleSha256(BitcoinStreamWriter.GetBytes(transaction.Write)));
}
return GetTreeRoot(hashes);
}
public BlockMessage(BlockHeader blockHeader, Tx[] transactions)
{
this.blockHeader = blockHeader;
this.transactions = transactions;
}
public void Reset()
{
dataStack.Clear();
altDataStack.Clear();
controlStack.Clear();
valid = true;
transaction = default(Tx);
transactionInputNumber = 0;
lastCodeSeparator = -1;
}
public TxMessage(Tx transaction)
{
this.transaction = transaction;
}