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(); }