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Diffstat (limited to 'src/bitcoin-tx.cpp')
| -rw-r--r-- | src/bitcoin-tx.cpp | 702 |
1 files changed, 702 insertions, 0 deletions
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp new file mode 100644 index 000000000..cb863bda1 --- /dev/null +++ b/src/bitcoin-tx.cpp @@ -0,0 +1,702 @@ +// Copyright (c) 2009-2015 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#if defined(HAVE_CONFIG_H) +#include "config/bitcoin-config.h" +#endif + +#include "base58.h" +#include "clientversion.h" +#include "coins.h" +#include "consensus/consensus.h" +#include "core_io.h" +#include "keystore.h" +#include "policy/policy.h" +#include "primitives/transaction.h" +#include "script/script.h" +#include "script/sign.h" +#include <univalue.h> +#include "util.h" +#include "utilmoneystr.h" +#include "utilstrencodings.h" + +#include <stdio.h> + +#include <boost/algorithm/string.hpp> +#include <boost/assign/list_of.hpp> + +using namespace std; + +static bool fCreateBlank; +static map<string,UniValue> registers; + +static bool AppInitRawTx(int argc, char* argv[]) +{ + // + // Parameters + // + ParseParameters(argc, argv); + + // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause) + try { + SelectParams(ChainNameFromCommandLine()); + } catch (const std::exception& e) { + fprintf(stderr, "Error: %s\n", e.what()); + return false; + } + + fCreateBlank = GetBoolArg("-create", false); + + if (argc<2 || mapArgs.count("-?") || mapArgs.count("-h") || mapArgs.count("-help")) + { + // First part of help message is specific to this utility + std::string strUsage = strprintf(_("%s bitcoin-tx utility version"), _(PACKAGE_NAME)) + " " + FormatFullVersion() + "\n\n" + + _("Usage:") + "\n" + + " bitcoin-tx [options] <hex-tx> [commands] " + _("Update hex-encoded bitcoin transaction") + "\n" + + " bitcoin-tx [options] -create [commands] " + _("Create hex-encoded bitcoin transaction") + "\n" + + "\n"; + + fprintf(stdout, "%s", strUsage.c_str()); + + strUsage = HelpMessageGroup(_("Options:")); + strUsage += HelpMessageOpt("-?", _("This help message")); + strUsage += HelpMessageOpt("-create", _("Create new, empty TX.")); + strUsage += HelpMessageOpt("-json", _("Select JSON output")); + strUsage += HelpMessageOpt("-txid", _("Output only the hex-encoded transaction id of the resultant transaction.")); + AppendParamsHelpMessages(strUsage); + + fprintf(stdout, "%s", strUsage.c_str()); + + strUsage = HelpMessageGroup(_("Commands:")); + strUsage += HelpMessageOpt("delin=N", _("Delete input N from TX")); + strUsage += HelpMessageOpt("delout=N", _("Delete output N from TX")); + strUsage += HelpMessageOpt("in=TXID:VOUT(:SEQUENCE_NUMBER)", _("Add input to TX")); + strUsage += HelpMessageOpt("locktime=N", _("Set TX lock time to N")); + strUsage += HelpMessageOpt("nversion=N", _("Set TX version to N")); + strUsage += HelpMessageOpt("outaddr=VALUE:ADDRESS", _("Add address-based output to TX")); + strUsage += HelpMessageOpt("outdata=[VALUE:]DATA", _("Add data-based output to TX")); + strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT", _("Add raw script output to TX")); + strUsage += HelpMessageOpt("sign=SIGHASH-FLAGS", _("Add zero or more signatures to transaction") + ". " + + _("This command requires JSON registers:") + + _("prevtxs=JSON object") + ", " + + _("privatekeys=JSON object") + ". " + + _("See signrawtransaction docs for format of sighash flags, JSON objects.")); + fprintf(stdout, "%s", strUsage.c_str()); + + strUsage = HelpMessageGroup(_("Register Commands:")); + strUsage += HelpMessageOpt("load=NAME:FILENAME", _("Load JSON file FILENAME into register NAME")); + strUsage += HelpMessageOpt("set=NAME:JSON-STRING", _("Set register NAME to given JSON-STRING")); + fprintf(stdout, "%s", strUsage.c_str()); + + return false; + } + return true; +} + +static void RegisterSetJson(const string& key, const string& rawJson) +{ + UniValue val; + if (!val.read(rawJson)) { + string strErr = "Cannot parse JSON for key " + key; + throw runtime_error(strErr); + } + + registers[key] = val; +} + +static void RegisterSet(const string& strInput) +{ + // separate NAME:VALUE in string + size_t pos = strInput.find(':'); + if ((pos == string::npos) || + (pos == 0) || + (pos == (strInput.size() - 1))) + throw runtime_error("Register input requires NAME:VALUE"); + + string key = strInput.substr(0, pos); + string valStr = strInput.substr(pos + 1, string::npos); + + RegisterSetJson(key, valStr); +} + +static void RegisterLoad(const string& strInput) +{ + // separate NAME:FILENAME in string + size_t pos = strInput.find(':'); + if ((pos == string::npos) || + (pos == 0) || + (pos == (strInput.size() - 1))) + throw runtime_error("Register load requires NAME:FILENAME"); + + string key = strInput.substr(0, pos); + string filename = strInput.substr(pos + 1, string::npos); + + FILE *f = fopen(filename.c_str(), "r"); + if (!f) { + string strErr = "Cannot open file " + filename; + throw runtime_error(strErr); + } + + // load file chunks into one big buffer + string valStr; + while ((!feof(f)) && (!ferror(f))) { + char buf[4096]; + int bread = fread(buf, 1, sizeof(buf), f); + if (bread <= 0) + break; + + valStr.insert(valStr.size(), buf, bread); + } + + int error = ferror(f); + fclose(f); + + if (error) { + string strErr = "Error reading file " + filename; + throw runtime_error(strErr); + } + + // evaluate as JSON buffer register + RegisterSetJson(key, valStr); +} + +static void MutateTxVersion(CMutableTransaction& tx, const string& cmdVal) +{ + int64_t newVersion = atoi64(cmdVal); + if (newVersion < 1 || newVersion > CTransaction::CURRENT_VERSION) + throw runtime_error("Invalid TX version requested"); + + tx.nVersion = (int) newVersion; +} + +static void MutateTxLocktime(CMutableTransaction& tx, const string& cmdVal) +{ + int64_t newLocktime = atoi64(cmdVal); + if (newLocktime < 0LL || newLocktime > 0xffffffffLL) + throw runtime_error("Invalid TX locktime requested"); + + tx.nLockTime = (unsigned int) newLocktime; +} + +static void MutateTxAddInput(CMutableTransaction& tx, const string& strInput) +{ + std::vector<std::string> vStrInputParts; + boost::split(vStrInputParts, strInput, boost::is_any_of(":")); + + // separate TXID:VOUT in string + if (vStrInputParts.size()<2) + throw runtime_error("TX input missing separator"); + + // extract and validate TXID + string strTxid = vStrInputParts[0]; + if ((strTxid.size() != 64) || !IsHex(strTxid)) + throw runtime_error("invalid TX input txid"); + uint256 txid(uint256S(strTxid)); + + static const unsigned int minTxOutSz = 9; + static const unsigned int maxVout = MAX_BLOCK_BASE_SIZE / minTxOutSz; + + // extract and validate vout + string strVout = vStrInputParts[1]; + int vout = atoi(strVout); + if ((vout < 0) || (vout > (int)maxVout)) + throw runtime_error("invalid TX input vout"); + + // extract the optional sequence number + uint32_t nSequenceIn=std::numeric_limits<unsigned int>::max(); + if (vStrInputParts.size() > 2) + nSequenceIn = std::stoul(vStrInputParts[2]); + + // append to transaction input list + CTxIn txin(txid, vout, CScript(), nSequenceIn); + tx.vin.push_back(txin); +} + +static void MutateTxAddOutAddr(CMutableTransaction& tx, const string& strInput) +{ + // separate VALUE:ADDRESS in string + size_t pos = strInput.find(':'); + if ((pos == string::npos) || + (pos == 0) || + (pos == (strInput.size() - 1))) + throw runtime_error("TX output missing separator"); + + // extract and validate VALUE + string strValue = strInput.substr(0, pos); + CAmount value; + if (!ParseMoney(strValue, value)) + throw runtime_error("invalid TX output value"); + + // extract and validate ADDRESS + string strAddr = strInput.substr(pos + 1, string::npos); + CBitcoinAddress addr(strAddr); + if (!addr.IsValid()) + throw runtime_error("invalid TX output address"); + + // build standard output script via GetScriptForDestination() + CScript scriptPubKey = GetScriptForDestination(addr.Get()); + + // construct TxOut, append to transaction output list + CTxOut txout(value, scriptPubKey); + tx.vout.push_back(txout); +} + +static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput) +{ + CAmount value = 0; + + // separate [VALUE:]DATA in string + size_t pos = strInput.find(':'); + + if (pos==0) + throw runtime_error("TX output value not specified"); + + if (pos != string::npos) { + // extract and validate VALUE + string strValue = strInput.substr(0, pos); + if (!ParseMoney(strValue, value)) + throw runtime_error("invalid TX output value"); + } + + // extract and validate DATA + string strData = strInput.substr(pos + 1, string::npos); + + if (!IsHex(strData)) + throw runtime_error("invalid TX output data"); + + std::vector<unsigned char> data = ParseHex(strData); + + CTxOut txout(value, CScript() << OP_RETURN << data); + tx.vout.push_back(txout); +} + +static void MutateTxAddOutScript(CMutableTransaction& tx, const string& strInput) +{ + // separate VALUE:SCRIPT in string + size_t pos = strInput.find(':'); + if ((pos == string::npos) || + (pos == 0)) + throw runtime_error("TX output missing separator"); + + // extract and validate VALUE + string strValue = strInput.substr(0, pos); + CAmount value; + if (!ParseMoney(strValue, value)) + throw runtime_error("invalid TX output value"); + + // extract and validate script + string strScript = strInput.substr(pos + 1, string::npos); + CScript scriptPubKey = ParseScript(strScript); // throws on err + + // construct TxOut, append to transaction output list + CTxOut txout(value, scriptPubKey); + tx.vout.push_back(txout); +} + +static void MutateTxDelInput(CMutableTransaction& tx, const string& strInIdx) +{ + // parse requested deletion index + int inIdx = atoi(strInIdx); + if (inIdx < 0 || inIdx >= (int)tx.vin.size()) { + string strErr = "Invalid TX input index '" + strInIdx + "'"; + throw runtime_error(strErr.c_str()); + } + + // delete input from transaction + tx.vin.erase(tx.vin.begin() + inIdx); +} + +static void MutateTxDelOutput(CMutableTransaction& tx, const string& strOutIdx) +{ + // parse requested deletion index + int outIdx = atoi(strOutIdx); + if (outIdx < 0 || outIdx >= (int)tx.vout.size()) { + string strErr = "Invalid TX output index '" + strOutIdx + "'"; + throw runtime_error(strErr.c_str()); + } + + // delete output from transaction + tx.vout.erase(tx.vout.begin() + outIdx); +} + +static const unsigned int N_SIGHASH_OPTS = 6; +static const struct { + const char *flagStr; + int flags; +} sighashOptions[N_SIGHASH_OPTS] = { + {"ALL", SIGHASH_ALL}, + {"NONE", SIGHASH_NONE}, + {"SINGLE", SIGHASH_SINGLE}, + {"ALL|ANYONECANPAY", SIGHASH_ALL|SIGHASH_ANYONECANPAY}, + {"NONE|ANYONECANPAY", SIGHASH_NONE|SIGHASH_ANYONECANPAY}, + {"SINGLE|ANYONECANPAY", SIGHASH_SINGLE|SIGHASH_ANYONECANPAY}, +}; + +static bool findSighashFlags(int& flags, const string& flagStr) +{ + flags = 0; + + for (unsigned int i = 0; i < N_SIGHASH_OPTS; i++) { + if (flagStr == sighashOptions[i].flagStr) { + flags = sighashOptions[i].flags; + return true; + } + } + + return false; +} + +uint256 ParseHashUO(map<string,UniValue>& o, string strKey) +{ + if (!o.count(strKey)) + return uint256(); + return ParseHashUV(o[strKey], strKey); +} + +vector<unsigned char> ParseHexUO(map<string,UniValue>& o, string strKey) +{ + if (!o.count(strKey)) { + vector<unsigned char> emptyVec; + return emptyVec; + } + return ParseHexUV(o[strKey], strKey); +} + +static CAmount AmountFromValue(const UniValue& value) +{ + if (!value.isNum() && !value.isStr()) + throw runtime_error("Amount is not a number or string"); + CAmount amount; + if (!ParseFixedPoint(value.getValStr(), 8, &amount)) + throw runtime_error("Invalid amount"); + if (!MoneyRange(amount)) + throw runtime_error("Amount out of range"); + return amount; +} + +static void MutateTxSign(CMutableTransaction& tx, const string& flagStr) +{ + int nHashType = SIGHASH_ALL; + + if (flagStr.size() > 0) + if (!findSighashFlags(nHashType, flagStr)) + throw runtime_error("unknown sighash flag/sign option"); + + vector<CTransaction> txVariants; + txVariants.push_back(tx); + + // mergedTx will end up with all the signatures; it + // starts as a clone of the raw tx: + CMutableTransaction mergedTx(txVariants[0]); + bool fComplete = true; + CCoinsView viewDummy; + CCoinsViewCache view(&viewDummy); + + if (!registers.count("privatekeys")) + throw runtime_error("privatekeys register variable must be set."); + CBasicKeyStore tempKeystore; + UniValue keysObj = registers["privatekeys"]; + + for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) { + if (!keysObj[kidx].isStr()) + throw runtime_error("privatekey not a string"); + CBitcoinSecret vchSecret; + bool fGood = vchSecret.SetString(keysObj[kidx].getValStr()); + if (!fGood) + throw runtime_error("privatekey not valid"); + + CKey key = vchSecret.GetKey(); + tempKeystore.AddKey(key); + } + + // Add previous txouts given in the RPC call: + if (!registers.count("prevtxs")) + throw runtime_error("prevtxs register variable must be set."); + UniValue prevtxsObj = registers["prevtxs"]; + { + for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) { + UniValue prevOut = prevtxsObj[previdx]; + if (!prevOut.isObject()) + throw runtime_error("expected prevtxs internal object"); + + map<string,UniValue::VType> types = boost::assign::map_list_of("txid", UniValue::VSTR)("vout",UniValue::VNUM)("scriptPubKey",UniValue::VSTR); + if (!prevOut.checkObject(types)) + throw runtime_error("prevtxs internal object typecheck fail"); + + uint256 txid = ParseHashUV(prevOut["txid"], "txid"); + + int nOut = atoi(prevOut["vout"].getValStr()); + if (nOut < 0) + throw runtime_error("vout must be positive"); + + vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey")); + CScript scriptPubKey(pkData.begin(), pkData.end()); + + { + CCoinsModifier coins = view.ModifyCoins(txid); + if (coins->IsAvailable(nOut) && coins->vout[nOut].scriptPubKey != scriptPubKey) { + string err("Previous output scriptPubKey mismatch:\n"); + err = err + ScriptToAsmStr(coins->vout[nOut].scriptPubKey) + "\nvs:\n"+ + ScriptToAsmStr(scriptPubKey); + throw runtime_error(err); + } + if ((unsigned int)nOut >= coins->vout.size()) + coins->vout.resize(nOut+1); + coins->vout[nOut].scriptPubKey = scriptPubKey; + coins->vout[nOut].nValue = 0; + if (prevOut.exists("amount")) { + coins->vout[nOut].nValue = AmountFromValue(prevOut["amount"]); + } + } + + // if redeemScript given and private keys given, + // add redeemScript to the tempKeystore so it can be signed: + if ((scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) && + prevOut.exists("redeemScript")) { + UniValue v = prevOut["redeemScript"]; + vector<unsigned char> rsData(ParseHexUV(v, "redeemScript")); + CScript redeemScript(rsData.begin(), rsData.end()); + tempKeystore.AddCScript(redeemScript); + } + } + } + + const CKeyStore& keystore = tempKeystore; + + bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE); + + // Sign what we can: + for (unsigned int i = 0; i < mergedTx.vin.size(); i++) { + CTxIn& txin = mergedTx.vin[i]; + const CCoins* coins = view.AccessCoins(txin.prevout.hash); + if (!coins || !coins->IsAvailable(txin.prevout.n)) { + fComplete = false; + continue; + } + const CScript& prevPubKey = coins->vout[txin.prevout.n].scriptPubKey; + const CAmount& amount = coins->vout[txin.prevout.n].nValue; + + SignatureData sigdata; + // Only sign SIGHASH_SINGLE if there's a corresponding output: + if (!fHashSingle || (i < mergedTx.vout.size())) + ProduceSignature(MutableTransactionSignatureCreator(&keystore, &mergedTx, i, amount, nHashType), prevPubKey, sigdata); + + // ... and merge in other signatures: + BOOST_FOREACH(const CTransaction& txv, txVariants) + sigdata = CombineSignatures(prevPubKey, MutableTransactionSignatureChecker(&mergedTx, i, amount), sigdata, DataFromTransaction(txv, i)); + UpdateTransaction(mergedTx, i, sigdata); + + if (!VerifyScript(txin.scriptSig, prevPubKey, mergedTx.wit.vtxinwit.size() > i ? &mergedTx.wit.vtxinwit[i].scriptWitness : NULL, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i, amount))) + fComplete = false; + } + + if (fComplete) { + // do nothing... for now + // perhaps store this for later optional JSON output + } + + tx = mergedTx; +} + +class Secp256k1Init +{ + ECCVerifyHandle globalVerifyHandle; + +public: + Secp256k1Init() { + ECC_Start(); + } + ~Secp256k1Init() { + ECC_Stop(); + } +}; + +static void MutateTx(CMutableTransaction& tx, const string& command, + const string& commandVal) +{ + std::unique_ptr<Secp256k1Init> ecc; + + if (command == "nversion") + MutateTxVersion(tx, commandVal); + else if (command == "locktime") + MutateTxLocktime(tx, commandVal); + + else if (command == "delin") + MutateTxDelInput(tx, commandVal); + else if (command == "in") + MutateTxAddInput(tx, commandVal); + + else if (command == "delout") + MutateTxDelOutput(tx, commandVal); + else if (command == "outaddr") + MutateTxAddOutAddr(tx, commandVal); + else if (command == "outdata") + MutateTxAddOutData(tx, commandVal); + else if (command == "outscript") + MutateTxAddOutScript(tx, commandVal); + + else if (command == "sign") { + if (!ecc) { ecc.reset(new Secp256k1Init()); } + MutateTxSign(tx, commandVal); + } + + else if (command == "load") + RegisterLoad(commandVal); + + else if (command == "set") + RegisterSet(commandVal); + + else + throw runtime_error("unknown command"); +} + +static void OutputTxJSON(const CTransaction& tx) +{ + UniValue entry(UniValue::VOBJ); + TxToUniv(tx, uint256(), entry); + + string jsonOutput = entry.write(4); + fprintf(stdout, "%s\n", jsonOutput.c_str()); +} + +static void OutputTxHash(const CTransaction& tx) +{ + string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id) + + fprintf(stdout, "%s\n", strHexHash.c_str()); +} + +static void OutputTxHex(const CTransaction& tx) +{ + string strHex = EncodeHexTx(tx); + + fprintf(stdout, "%s\n", strHex.c_str()); +} + +static void OutputTx(const CTransaction& tx) +{ + if (GetBoolArg("-json", false)) + OutputTxJSON(tx); + else if (GetBoolArg("-txid", false)) + OutputTxHash(tx); + else + OutputTxHex(tx); +} + +static string readStdin() +{ + char buf[4096]; + string ret; + + while (!feof(stdin)) { + size_t bread = fread(buf, 1, sizeof(buf), stdin); + ret.append(buf, bread); + if (bread < sizeof(buf)) + break; + } + + if (ferror(stdin)) + throw runtime_error("error reading stdin"); + + boost::algorithm::trim_right(ret); + + return ret; +} + +static int CommandLineRawTx(int argc, char* argv[]) +{ + string strPrint; + int nRet = 0; + try { + // Skip switches; Permit common stdin convention "-" + while (argc > 1 && IsSwitchChar(argv[1][0]) && + (argv[1][1] != 0)) { + argc--; + argv++; + } + + CTransaction txDecodeTmp; + int startArg; + + if (!fCreateBlank) { + // require at least one param + if (argc < 2) + throw runtime_error("too few parameters"); + + // param: hex-encoded bitcoin transaction + string strHexTx(argv[1]); + if (strHexTx == "-") // "-" implies standard input + strHexTx = readStdin(); + + if (!DecodeHexTx(txDecodeTmp, strHexTx)) + throw runtime_error("invalid transaction encoding"); + + startArg = 2; + } else + startArg = 1; + + CMutableTransaction tx(txDecodeTmp); + + for (int i = startArg; i < argc; i++) { + string arg = argv[i]; + string key, value; + size_t eqpos = arg.find('='); + if (eqpos == string::npos) + key = arg; + else { + key = arg.substr(0, eqpos); + value = arg.substr(eqpos + 1); + } + + MutateTx(tx, key, value); + } + + OutputTx(tx); + } + + catch (const boost::thread_interrupted&) { + throw; + } + catch (const std::exception& e) { + strPrint = string("error: ") + e.what(); + nRet = EXIT_FAILURE; + } + catch (...) { + PrintExceptionContinue(NULL, "CommandLineRawTx()"); + throw; + } + + if (strPrint != "") { + fprintf((nRet == 0 ? stdout : stderr), "%s\n", strPrint.c_str()); + } + return nRet; +} + +int main(int argc, char* argv[]) +{ + SetupEnvironment(); + + try { + if(!AppInitRawTx(argc, argv)) + return EXIT_FAILURE; + } + catch (const std::exception& e) { + PrintExceptionContinue(&e, "AppInitRawTx()"); + return EXIT_FAILURE; + } catch (...) { + PrintExceptionContinue(NULL, "AppInitRawTx()"); + return EXIT_FAILURE; + } + + int ret = EXIT_FAILURE; + try { + ret = CommandLineRawTx(argc, argv); + } + catch (const std::exception& e) { + PrintExceptionContinue(&e, "CommandLineRawTx()"); + } catch (...) { + PrintExceptionContinue(NULL, "CommandLineRawTx()"); + } + return ret; +} |