std::string createtransaction(bool bHelp, params_t& params)
{
if (bHelp || params.size() != 5) {
return "createtransaction <outhash> <outindex> <redeemscript> <toaddress> <value> - creates a transaction claiming a multisignature input.";
}
uchar_vector outHash = params[0];
uint outIndex = strtoul(params[1].c_str(), NULL, 10);
uchar_vector redeemScript = params[2];
std::string toAddress = params[3];
uint64_t value = strtoull(params[4].c_str(), NULL, 10);
StandardTxOut txOut;
txOut.set(toAddress, value);
MultiSigRedeemScript multiSig;
multiSig.parseRedeemScript(redeemScript);
P2SHTxIn txIn(outHash, outIndex, multiSig.getRedeemScript());
txIn.setScriptSig(SCRIPT_SIG_SIGN);
Transaction tx;
tx.addOutput(txOut);
tx.addInput(txIn);
uchar_vector hashToSign = tx.getHashWithAppendedCode(1); // SIGHASH_ALL
for (uint i = 0; i < multiSig.getPubKeyCount(); i++) {
txIn.addSig(uchar_vector(), uchar_vector(), SIGHASH_ALREADYADDED);
}
txIn.setScriptSig(SCRIPT_SIG_EDIT);
tx.clearInputs();
tx.addInput(txIn);
return tx.getSerialized().getHex();
}
std::string signtransaction(bool bHelp, params_t& params)
{
if (bHelp || params.size() < 6) {
return "signtransaction <outhash> <outindex> <redeemscript> <toaddress> <value> <privkey1> [<privkey2> <privkey3> ...] - creates and signs a transaction claiming a multisignature input.";
}
uchar_vector outHash = params[0];
uint outIndex = strtoul(params[1].c_str(), NULL, 10);
uchar_vector redeemScript = params[2];
std::string toAddress = params[3];
uint64_t value = strtoull(params[4].c_str(), NULL, 10);
std::vector<std::string> privKeys;
for (uint i = 5; i < params.size(); i++) {
privKeys.push_back(params[i]);
}
StandardTxOut txOut;
txOut.set(toAddress, value);
MultiSigRedeemScript multiSig;
multiSig.parseRedeemScript(redeemScript);
P2SHTxIn txIn(outHash, outIndex, multiSig.getRedeemScript());
txIn.setScriptSig(SCRIPT_SIG_SIGN);
Transaction tx;
tx.addOutput(txOut);
tx.addInput(txIn);
uchar_vector hashToSign = tx.getHashWithAppendedCode(1); // SIGHASH_ALL
// TODO: make sure to wipe all key data if there's any failure
CoinKey key;
for (uint i = 0; i < privKeys.size(); i++) {
if (!key.setWalletImport(privKeys[i])) {
std::stringstream ss;
ss << "Private key " << i+1 << " is invalid.";
throw std::runtime_error(ss.str());
}
uchar_vector sig;
if (!key.sign(hashToSign, sig)) {
std::stringstream ss;
ss << "Error signing with key " << i+1 << ".";
throw std::runtime_error(ss.str());
}
txIn.addSig(uchar_vector(), sig);
}
if (privKeys.size() < multiSig.getMinSigs()) {
txIn.setScriptSig(SCRIPT_SIG_EDIT);
}
else {
txIn.setScriptSig(SCRIPT_SIG_BROADCAST);
}
tx.clearInputs();
tx.addInput(txIn);
return tx.getSerialized().getHex();
}
