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// Copyright (c) 2009-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "base58.h"
#include "clientversion.h"
#include "primitives/block.h" // for MAX_BLOCK_SIZE
#include "primitives/transaction.h"
#include "core_io.h"
#include "coins.h"
#include "keystore.h"
#include "script/script.h"
#include "script/sign.h"
#include "ui_interface.h" // for _(...)
#include "univalue/univalue.h"
#include "util.h"
#include "utilstrencodings.h"
#include "utilmoneystr.h"
#include <stdio.h>
#include <boost/algorithm/string.hpp>
#include <boost/assign/list_of.hpp>
using namespace boost::assign;
using namespace std;
static bool fCreateBlank;
static map<string,UniValue> registers;
CClientUIInterface uiInterface;
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)
if (!SelectParamsFromCommandLine()) {
fprintf(stderr, "Error: Invalid combination of -regtest and -testnet.\n");
return false;
}
fCreateBlank = GetBoolArg("-create", false);
if (argc<2 || mapArgs.count("-?") || mapArgs.count("-help"))
{
// First part of help message is specific to this utility
std::string strUsage = _("Bitcoin Core bitcoin-tx utility version") + " " + 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 = _("Options:") + "\n";
strUsage += " -? " + _("This help message") + "\n";
strUsage += " -create " + _("Create new, empty TX.") + "\n";
strUsage += " -json " + _("Select JSON output") + "\n";
strUsage += " -txid " + _("Output only the hex-encoded transaction id of the resultant transaction.") + "\n";
strUsage += " -regtest " + _("Enter regression test mode, which uses a special chain in which blocks can be solved instantly.") + "\n";
strUsage += " -testnet " + _("Use the test network") + "\n";
strUsage += "\n";
fprintf(stdout, "%s", strUsage.c_str());
strUsage = _("Commands:") + "\n";
strUsage += " delin=N " + _("Delete input N from TX") + "\n";
strUsage += " delout=N " + _("Delete output N from TX") + "\n";
strUsage += " in=TXID:VOUT " + _("Add input to TX") + "\n";
strUsage += " locktime=N " + _("Set TX lock time to N") + "\n";
strUsage += " nversion=N " + _("Set TX version to N") + "\n";
strUsage += " outaddr=VALUE:ADDRESS " + _("Add address-based output to TX") + "\n";
strUsage += " outscript=VALUE:SCRIPT " + _("Add raw script output to TX") + "\n";
strUsage += " sign=SIGHASH-FLAGS " + _("Add zero or more signatures to transaction") + "\n";
strUsage += " This command requires JSON registers:\n";
strUsage += " prevtxs=JSON object\n";
strUsage += " privatekeys=JSON object\n";
strUsage += " See signrawtransaction docs for format of sighash flags, JSON objects.\n";
strUsage += "\n";
fprintf(stdout, "%s", strUsage.c_str());
strUsage = _("Register Commands:") + "\n";
strUsage += " load=NAME:FILENAME " + _("Load JSON file FILENAME into register NAME") + "\n";
strUsage += " set=NAME:JSON-STRING " + _("Set register NAME to given JSON-STRING") + "\n";
strUsage += "\n";
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);
}
if (ferror(f)) {
string strErr = "Error reading file " + filename;
throw runtime_error(strErr);
}
fclose(f);
// 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)
{
// separate TXID:VOUT in string
size_t pos = strInput.find(':');
if ((pos == string::npos) ||
(pos == 0) ||
(pos == (strInput.size() - 1)))
throw runtime_error("TX input missing separator");
// extract and validate TXID
string strTxid = strInput.substr(0, pos);
if ((strTxid.size() != 64) || !IsHex(strTxid))
throw runtime_error("invalid TX input txid");
uint256 txid(strTxid);
static const unsigned int minTxOutSz = 9;
static const unsigned int maxVout = MAX_BLOCK_SIZE / minTxOutSz;
// extract and validate vout
string strVout = strInput.substr(pos + 1, string::npos);
int vout = atoi(strVout);
if ((vout < 0) || (vout > (int)maxVout))
throw runtime_error("invalid TX input vout");
// append to transaction input list
CTxIn txin(txid, vout);
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 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 0;
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 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.");
bool fGivenKeys = false;
CBasicKeyStore tempKeystore;
UniValue keysObj = registers["privatekeys"];
fGivenKeys = true;
for (unsigned int kidx = 0; kidx < keysObj.count(); 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["privatekeys"];
{
for (unsigned int previdx = 0; previdx < prevtxsObj.count(); previdx++) {
UniValue prevOut = prevtxsObj[previdx];
if (!prevOut.isObject())
throw runtime_error("expected prevtxs internal object");
map<string,UniValue::VType> types = 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");
int nOut = atoi(prevOut["vout"].getValStr());
if (nOut < 0)
throw runtime_error("vout must be positive");
vector<unsigned char> pkData(ParseHexUV(prevOut, "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 + coins->vout[nOut].scriptPubKey.ToString() + "\nvs:\n"+
scriptPubKey.ToString();
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; // we don't know the actual output value
}
// if redeemScript given and private keys given,
// add redeemScript to the tempKeystore so it can be signed:
if (fGivenKeys && scriptPubKey.IsPayToScriptHash() &&
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;
txin.scriptSig.clear();
// Only sign SIGHASH_SINGLE if there's a corresponding output:
if (!fHashSingle || (i < mergedTx.vout.size()))
SignSignature(keystore, prevPubKey, mergedTx, i, nHashType);
// ... and merge in other signatures:
BOOST_FOREACH(const CTransaction& txv, txVariants) {
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, txv.vin[i].scriptSig);
}
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, SignatureChecker(mergedTx, i)))
fComplete = false;
}
if (fComplete) {
// do nothing... for now
// perhaps store this for later optional JSON output
}
tx = mergedTx;
}
static void MutateTx(CMutableTransaction& tx, const string& command,
const string& commandVal)
{
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 == "outscript")
MutateTxAddOutScript(tx, commandVal);
else if (command == "sign")
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, 0, 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;
}