public void Write(BitcoinStreamWriter writer)
{
previousOutput.Write(writer);
writer.WriteCompact((ulong) signatureScript.Length);
writer.Write(signatureScript);
writer.Write(sequence);
}
public void Write(BitcoinStreamWriter writer)
{
writer.WriteCompact((ulong) inventory.Count);
foreach (InventoryVector vector in inventory)
{
vector.Write(writer);
}
}
public void Write(BitcoinStreamWriter writer)
{
writer.Write(protocolVersion);
writer.WriteCompact((ulong) locatorHashes.Count);
foreach (byte[] hash in locatorHashes)
{
writer.Write(hash);
}
writer.Write(hashStop);
}
public void Write(BitcoinStreamWriter writer)
{
writer.Write(value);
writer.WriteCompact((ulong) pubkeyScript.Length);
writer.Write(pubkeyScript);
}
private bool CheckSig(byte[] script)
{
if (dataStack.Count < 2)
{
valid = false;
return false;
}
byte[] pubKey = PopData();
byte[] signatureBlock = PopData();
//todo: validate length first
byte hashtype = signatureBlock[signatureBlock.Length - 1];
byte[] signature = new byte[signatureBlock.Length - 1];
Array.Copy(signatureBlock, 0, signature, 0, signatureBlock.Length - 1);
//todo: process hashtype
MemoryStream mem = new MemoryStream();
// todo: remove signatures from script
// todo: also remove all OP_CODESEPARATORs from script
byte[] subScript = script;
if (lastCodeSeparator >= 0)
{
subScript = new byte[script.Length - lastCodeSeparator - 1];
Array.Copy(script, lastCodeSeparator + 1, subScript, 0, script.Length - lastCodeSeparator - 1);
}
using (BitcoinStreamWriter writer = new BitcoinStreamWriter(mem))
{
//todo: check if transaction exists
writer.Write(transaction.Version);
writer.WriteCompact((ulong) transaction.Inputs.Length);
for (int i = 0; i < transaction.Inputs.Length; i++)
{
TxIn input = transaction.Inputs[i];
input.PreviousOutput.Write(writer);
if (transactionInputNumber == i)
{
writer.WriteCompact((ulong) subScript.Length);
writer.Write(subScript);
}
else
{
writer.WriteCompact(0);
}
writer.Write(input.Sequence);
}
writer.WriteArray(transaction.Outputs, (w, v) => v.Write(writer));
writer.Write(transaction.LockTime);
writer.Write((uint) hashtype);
}
byte[] signedData = mem.ToArray();
return SignatureUtils.Verify(signedData, pubKey, signature);
}
private static byte[] GetMessageHash(string message)
{
byte[] messagePrefix = Encoding.ASCII.GetBytes("Bitcoin Signed Message:\n");
byte[] messageBytes = Encoding.UTF8.GetBytes(message);
MemoryStream mem = new MemoryStream();
using (BitcoinStreamWriter writer = new BitcoinStreamWriter(mem))
{
writer.WriteCompact((ulong) messagePrefix.Length);
writer.Write(messagePrefix, 0, messagePrefix.Length);
writer.WriteCompact((ulong) messageBytes.Length);
writer.Write(messageBytes, 0, messageBytes.Length);
}
byte[] text = mem.ToArray();
return CryptoUtils.DoubleSha256(text);
}
public void Write(BitcoinStreamWriter writer)
{
blockHeader.Write(writer);
writer.Write(totalTransactions);
writer.WriteCompact((ulong) hashes.Count);
foreach (byte[] hash in hashes)
{
writer.Write(hash);
}
writer.WriteCompact((ulong) flags.Length);
writer.Write(flags);
}