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kevacoin/src/bitcoin-tx.cpp

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// 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>
static bool fCreateBlank;
static std::map<std::string,UniValue> registers;
static const int CONTINUE_EXECUTION=-1;
//
// This function returns either one of EXIT_ codes when it's expected to stop the process or
// CONTINUE_EXECUTION when it's expected to continue further.
//
static int 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 EXIT_FAILURE;
}
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());
if (argc < 2) {
fprintf(stderr, "Error: too few parameters\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
return CONTINUE_EXECUTION;
}
static void RegisterSetJson(const std::string& key, const std::string& rawJson)
{
UniValue val;
if (!val.read(rawJson)) {
std::string strErr = "Cannot parse JSON for key " + key;
throw std::runtime_error(strErr);
}
registers[key] = val;
}
static void RegisterSet(const std::string& strInput)
{
// separate NAME:VALUE in string
size_t pos = strInput.find(':');
if ((pos == std::string::npos) ||
(pos == 0) ||
(pos == (strInput.size() - 1)))
throw std::runtime_error("Register input requires NAME:VALUE");
std::string key = strInput.substr(0, pos);
std::string valStr = strInput.substr(pos + 1, std::string::npos);
RegisterSetJson(key, valStr);
}
static void RegisterLoad(const std::string& strInput)
{
// separate NAME:FILENAME in string
size_t pos = strInput.find(':');
if ((pos == std::string::npos) ||
(pos == 0) ||
(pos == (strInput.size() - 1)))
throw std::runtime_error("Register load requires NAME:FILENAME");
std::string key = strInput.substr(0, pos);
std::string filename = strInput.substr(pos + 1, std::string::npos);
FILE *f = fopen(filename.c_str(), "r");
if (!f) {
std::string strErr = "Cannot open file " + filename;
throw std::runtime_error(strErr);
}
// load file chunks into one big buffer
std::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) {
std::string strErr = "Error reading file " + filename;
throw std::runtime_error(strErr);
}
// evaluate as JSON buffer register
RegisterSetJson(key, valStr);
}
static void MutateTxVersion(CMutableTransaction& tx, const std::string& cmdVal)
{
int64_t newVersion = atoi64(cmdVal);
if (newVersion < 1 || newVersion > CTransaction::MAX_STANDARD_VERSION)
throw std::runtime_error("Invalid TX version requested");
tx.nVersion = (int) newVersion;
}
static void MutateTxLocktime(CMutableTransaction& tx, const std::string& cmdVal)
{
int64_t newLocktime = atoi64(cmdVal);
if (newLocktime < 0LL || newLocktime > 0xffffffffLL)
throw std::runtime_error("Invalid TX locktime requested");
tx.nLockTime = (unsigned int) newLocktime;
}
static void MutateTxAddInput(CMutableTransaction& tx, const std::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 std::runtime_error("TX input missing separator");
// extract and validate TXID
std::string strTxid = vStrInputParts[0];
if ((strTxid.size() != 64) || !IsHex(strTxid))
throw std::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
std::string strVout = vStrInputParts[1];
int vout = atoi(strVout);
if ((vout < 0) || (vout > (int)maxVout))
throw std::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 std::string& strInput)
{
// separate VALUE:ADDRESS in string
size_t pos = strInput.find(':');
if ((pos == std::string::npos) ||
(pos == 0) ||
(pos == (strInput.size() - 1)))
throw std::runtime_error("TX output missing separator");
// extract and validate VALUE
std::string strValue = strInput.substr(0, pos);
CAmount value;
if (!ParseMoney(strValue, value))
throw std::runtime_error("invalid TX output value");
// extract and validate ADDRESS
std::string strAddr = strInput.substr(pos + 1, std::string::npos);
CBitcoinAddress addr(strAddr);
if (!addr.IsValid())
throw std::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 std::string& strInput)
{
CAmount value = 0;
// separate [VALUE:]DATA in string
size_t pos = strInput.find(':');
if (pos==0)
throw std::runtime_error("TX output value not specified");
if (pos != std::string::npos) {
// extract and validate VALUE
std::string strValue = strInput.substr(0, pos);
if (!ParseMoney(strValue, value))
throw std::runtime_error("invalid TX output value");
}
// extract and validate DATA
std::string strData = strInput.substr(pos + 1, std::string::npos);
if (!IsHex(strData))
throw std::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 std::string& strInput)
{
// separate VALUE:SCRIPT in string
size_t pos = strInput.find(':');
if ((pos == std::string::npos) ||
(pos == 0))
throw std::runtime_error("TX output missing separator");
// extract and validate VALUE
std::string strValue = strInput.substr(0, pos);
CAmount value;
if (!ParseMoney(strValue, value))
throw std::runtime_error("invalid TX output value");
// extract and validate script
std::string strScript = strInput.substr(pos + 1, std::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 std::string& strInIdx)
{
// parse requested deletion index
int inIdx = atoi(strInIdx);
if (inIdx < 0 || inIdx >= (int)tx.vin.size()) {
std::string strErr = "Invalid TX input index '" + strInIdx + "'";
throw std::runtime_error(strErr.c_str());
}
// delete input from transaction
tx.vin.erase(tx.vin.begin() + inIdx);
}
static void MutateTxDelOutput(CMutableTransaction& tx, const std::string& strOutIdx)
{
// parse requested deletion index
int outIdx = atoi(strOutIdx);
if (outIdx < 0 || outIdx >= (int)tx.vout.size()) {
std::string strErr = "Invalid TX output index '" + strOutIdx + "'";
throw std::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 std::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(std::map<std::string,UniValue>& o, std::string strKey)
{
if (!o.count(strKey))
return uint256();
return ParseHashUV(o[strKey], strKey);
}
std::vector<unsigned char> ParseHexUO(std::map<std::string,UniValue>& o, std::string strKey)
{
if (!o.count(strKey)) {
std::vector<unsigned char> emptyVec;
return emptyVec;
}
return ParseHexUV(o[strKey], strKey);
}
static CAmount AmountFromValue(const UniValue& value)
{
if (!value.isNum() && !value.isStr())
throw std::runtime_error("Amount is not a number or string");
CAmount amount;
if (!ParseFixedPoint(value.getValStr(), 8, &amount))
throw std::runtime_error("Invalid amount");
if (!MoneyRange(amount))
throw std::runtime_error("Amount out of range");
return amount;
}
static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
{
int nHashType = SIGHASH_ALL;
if (flagStr.size() > 0)
if (!findSighashFlags(nHashType, flagStr))
throw std::runtime_error("unknown sighash flag/sign option");
std::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 std::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 std::runtime_error("privatekey not a std::string");
CBitcoinSecret vchSecret;
bool fGood = vchSecret.SetString(keysObj[kidx].getValStr());
if (!fGood)
throw std::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 std::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 std::runtime_error("expected prevtxs internal object");
std::map<std::string,UniValue::VType> types = boost::assign::map_list_of("txid", UniValue::VSTR)("vout",UniValue::VNUM)("scriptPubKey",UniValue::VSTR);
if (!prevOut.checkObject(types))
throw std::runtime_error("prevtxs internal object typecheck fail");
uint256 txid = ParseHashUV(prevOut["txid"], "txid");
int nOut = atoi(prevOut["vout"].getValStr());
if (nOut < 0)
throw std::runtime_error("vout must be positive");
std::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) {
std::string err("Previous output scriptPubKey mismatch:\n");
err = err + ScriptToAsmStr(coins->vout[nOut].scriptPubKey) + "\nvs:\n"+
ScriptToAsmStr(scriptPubKey);
throw std::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"];
std::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 std::string& command,
const std::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 std::runtime_error("unknown command");
}
static void OutputTxJSON(const CTransaction& tx)
{
UniValue entry(UniValue::VOBJ);
TxToUniv(tx, uint256(), entry);
std::string jsonOutput = entry.write(4);
fprintf(stdout, "%s\n", jsonOutput.c_str());
}
static void OutputTxHash(const CTransaction& tx)
{
std::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)
{
std::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 std::string readStdin()
{
char buf[4096];
std::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 std::runtime_error("error reading stdin");
boost::algorithm::trim_right(ret);
return ret;
}
static int CommandLineRawTx(int argc, char* argv[])
{
std::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 std::runtime_error("too few parameters");
// param: hex-encoded bitcoin transaction
std::string strHexTx(argv[1]);
if (strHexTx == "-") // "-" implies standard input
strHexTx = readStdin();
if (!DecodeHexTx(txDecodeTmp, strHexTx, true))
throw std::runtime_error("invalid transaction encoding");
startArg = 2;
} else
startArg = 1;
CMutableTransaction tx(txDecodeTmp);
for (int i = startArg; i < argc; i++) {
std::string arg = argv[i];
std::string key, value;
size_t eqpos = arg.find('=');
if (eqpos == std::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 = std::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 {
int ret = AppInitRawTx(argc, argv);
if (ret != CONTINUE_EXECUTION)
return ret;
}
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;
}