public static Byte[] ToByteArray(String s, out Byte version)
{
SHA256 sha256 = SHA256.Create();
Byte[] b = Base58String.ToByteArray(s);
Byte[] hash = sha256.ComputeHash(sha256.ComputeHash(b.Take(b.Length - 4).ToArray()));
if (!hash.Take(4).SequenceEqual(b.Skip(b.Length - 4).Take(4)))
{
throw new ArgumentException("Invalid Base58Check String");
}
version = b.First();
return(b.Skip(1).Take(b.Length - 5).ToArray());
}
private byte[] parseKey(string key)
{
SHA256 sha = SHA256.Create();
byte[] decoded = Base58String.ToByteArray(key);
if (decoded.Length != 82) throw new Exception("Not enough data");
byte[] checksum = decoded.Skip(78).Take(4).ToArray();
byte[] bytes = decoded.Take(78).ToArray();
byte[] hash = sha.ComputeHash(sha.ComputeHash(bytes));
if (hash[0] != checksum[0] || hash[1] != checksum[1] || hash[2] != checksum[2] || hash[3] != checksum[3])
{
throw new Exception("Invalid checksum");
}
return bytes;
}
public string ExtendedPrivateKeyString(string format)
{
SHA256 sha = SHA256.Create();
if (format == null || format == "base58")
{
byte[] hash = sha.ComputeHash(sha.ComputeHash(this.extended_private_key));
byte[] checksum = hash.Take(4).ToArray();
byte[] data = this.extended_private_key.Concat(checksum).ToArray();
return Base58String.FromByteArray(data);
}
else if (format == "hex")
{
return HexString.FromByteArray(this.extended_private_key);
}
else
{
throw new Exception("bad format");
}
}
public BIP32(string sKey, secp256k1Wrap psecp256k1 )
{
secp256k1 = psecp256k1;
SHA256 sha = SHA256.Create();
byte[] decoded = Base58String.ToByteArray(sKey);
if (decoded.Length != 82) throw new Exception("Not enough data");
byte[] checksum = decoded.Skip(78).Take(4).ToArray();
byte[] bytes = decoded.Take(78).ToArray();
byte[] hash = sha.ComputeHash(sha.ComputeHash(bytes));
if (hash[0] != checksum[0] || hash[1] != checksum[1] || hash[2] != checksum[2] || hash[3] != checksum[3])
{
throw new Exception("Invalid checksum");
}
Initialise(bytes);
}
public static string MultiSig2Of3TransactionForTesting(string publickey1, string publickey2, string publickey3, string privKey1, string privKey2, string transactionid, uint prevoutIndex, string toAddress, ulong amount)
{
TxIn[] txins = new TxIn[1];
TxOut[] txouts = new TxOut[1];
byte version = 0;
//PayToAddress
HashType hashType = HashType.SIGHASH_ALL;
PublicKey pk = new PublicKey(HexString.ToByteArray(toAddress));
//Address add = new Address(pk.);
//address to send coins to
// string dec = HexString.FromByteArray(Base58CheckString.ToByteArray(add.ToString(), out version));
//create address
//create script to pay to address
Script sc = ScriptTemplate.PayToAddress(pk.address);
//create transaction output
TxOut tout = new TxOut(amount - 5, sc.ToBytes());
txouts[0] = tout;
object[] addresses = new object[3];
addresses[0] = publickey1;
addresses[1] = publickey2;
addresses[2] = publickey3;
string mscript = MultSigScript(addresses);
//create input based on previous output to spend
//and the redeem script for the multi-sig address
TxIn tin = new TxIn(HexString.ToByteArrayReversed(transactionid), prevoutIndex, HexString.ToByteArray(mscript));
txins[0] = tin;
//basically the redeem script
Script subScript = new Script(tin.scriptSig);
//create the new transaction to spend the coins at the multisig address
Transaction tx = new Transaction(1, txins, txouts, 0);
//clone the transaction
Transaction txCopy = new Transaction(tx.ToBytes());
SHA256 sha256 = SHA256.Create();
//hash the transaction with some leading bytes
Byte[] txHash = txCopy.ToBytes().Concat(new Byte[] { (Byte)hashType, 0x00, 0x00, 0x00 }).ToArray();
txHash = sha256.ComputeHash(sha256.ComputeHash(txHash));
//get the private keys bytes 1-33 and base58
byte[] test58 = Base58String.ToByteArray(privKey1).Skip(1).Take(32).ToArray();
ECKeyPair key1 = new ECKeyPair(test58, null, false);
PrivateKey pk1 = new PrivateKey(key1);
byte[] test582 = Base58String.ToByteArray(privKey2).Skip(1).Take(32).ToArray();
ECKeyPair key2 = new ECKeyPair(test582, null, false);
PrivateKey pk2 = new PrivateKey(key2);
//Script scriptSig = new Script(tin.scriptSig);
//sign the transaction hash
Byte[] sig = pk1.Sign(txHash).Concat(new Byte[] { (Byte)hashType }).ToArray();
Byte[] sig2 = pk2.Sign(txHash).Concat(new Byte[] { (Byte)hashType }).ToArray();
//create a new script to sign
Script s = new Script(new Byte[] { 0x00 });
//add the signatures to the script
s.elements.Add(new ScriptElement(sig));
s.elements.Add(new ScriptElement(sig2));
//txtResult.Text = HexString.FromByteArray(tx.ToBytes());
//add the original multisig script
s.elements.Add(new ScriptElement(tin.scriptSig));
//overwrite the script on the transaction with the new signatures + script
tin.scriptSig = s.ToBytes();
return(HexString.FromByteArray(tx.ToBytes()));
}
