public static void Sign(this TxIn txin, Transaction tx, TxOut prevOut, PrivateKey key, HashType hashType = HashType.SIGHASH_ALL) { SHA256 sha256 = new SHA256Managed(); UInt32 txInIndex; for (txInIndex = 0; txInIndex < tx.inputs.Length; txInIndex++) { if (TxIn.ReferenceEquals(txin, tx.inputs[txInIndex])) break; } if (txInIndex == tx.inputs.Length) throw new ArgumentException("Input not part of transaction."); // Only know how to sign if output does not contain OP_CODESEPERATOR for now. Script subScript = new Script(prevOut.scriptPubKey); Transaction txCopy = tx.CopyForSigning(txInIndex, subScript, hashType); Byte[] txHash = txCopy.ToBytes().Concat(new Byte[] { (Byte)hashType, 0x00, 0x00, 0x00 }).ToArray(); txHash = sha256.ComputeHash(sha256.ComputeHash(txHash)); Byte[] sig = key.Sign(txHash); sig = sig.Concat(new Byte[] { (Byte)hashType }).ToArray(); Script s = new Script(); if (subScript.IsPayToAddress()) { s.elements.Add(new ScriptElement(sig)); s.elements.Add(new ScriptElement(key.pubKey.ToBytes())); } else if (subScript.IsPayToPublicKey()) { s.elements.Add(new ScriptElement(sig)); } else { throw new ArgumentException("Unrecognized TxOut Script"); } txin.scriptSig = s.ToBytes(); }
public static Address FromScript(Byte[] b) { Script s = new Script(b); if (s.IsPayToAddress()) return new Address(s.elements[s.elements.Count - 3].data, PUBKEYHASH); if (s.IsPayToScriptHash()) return new Address(s.elements[s.elements.Count - 2].data, SCRIPTHASH); if (s.IsPayToPublicKey()) return new Address(s.elements[s.elements.Count - 2].data, PUBKEY); return null; }