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bitcoin/src/bitcoin-tx.cpp

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// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <config/bitcoin-config.h> // IWYU pragma: keep
#include <chainparamsbase.h>
#include <clientversion.h>
#include <coins.h>
#include <common/args.h>
#include <common/system.h>
#include <compat/compat.h>
#include <consensus/amount.h>
#include <consensus/consensus.h>
#include <core_io.h>
#include <key_io.h>
#include <policy/policy.h>
#include <primitives/transaction.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <univalue.h>
#include <util/exception.h>
#include <util/fs.h>
#include <util/moneystr.h>
#include <util/rbf.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/translation.h>
#include <cstdio>
#include <functional>
#include <memory>
using util::SplitString;
using util::ToString;
using util::TrimString;
using util::TrimStringView;
static bool fCreateBlank;
static std::map<std::string,UniValue> registers;
static const int CONTINUE_EXECUTION=-1;
const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
static void SetupBitcoinTxArgs(ArgsManager &argsman)
{
SetupHelpOptions(argsman);
argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-create", "Create new, empty TX.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-json", "Select JSON output", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-txid", "Output only the hex-encoded transaction id of the resultant transaction.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
SetupChainParamsBaseOptions(argsman);
argsman.AddArg("delin=N", "Delete input N from TX", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("delout=N", "Delete output N from TX", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("in=TXID:VOUT(:SEQUENCE_NUMBER)", "Add input to TX", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("locktime=N", "Set TX lock time to N", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("nversion=N", "Set TX version to N", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("outaddr=VALUE:ADDRESS", "Add address-based output to TX", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("outdata=[VALUE:]DATA", "Add data-based output to TX", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("outmultisig=VALUE:REQUIRED:PUBKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]", "Add Pay To n-of-m Multi-sig output to TX. n = REQUIRED, m = PUBKEYS. "
"Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output. "
"Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash.", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("outpubkey=VALUE:PUBKEY[:FLAGS]", "Add pay-to-pubkey output to TX. "
"Optionally add the \"W\" flag to produce a pay-to-witness-pubkey-hash output. "
"Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash.", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("outscript=VALUE:SCRIPT[:FLAGS]", "Add raw script output to TX. "
"Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output. "
"Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash.", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("replaceable(=N)", "Sets Replace-By-Fee (RBF) opt-in sequence number for input N. "
"If N is not provided, the command attempts to opt-in all available inputs for RBF. "
"If the transaction has no inputs, this option is ignored.", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("sign=SIGHASH-FLAGS", "Add zero or more signatures to transaction. "
"This command requires JSON registers:"
"prevtxs=JSON object, "
"privatekeys=JSON object. "
"See signrawtransactionwithkey docs for format of sighash flags, JSON objects.", ArgsManager::ALLOW_ANY, OptionsCategory::COMMANDS);
argsman.AddArg("load=NAME:FILENAME", "Load JSON file FILENAME into register NAME", ArgsManager::ALLOW_ANY, OptionsCategory::REGISTER_COMMANDS);
argsman.AddArg("set=NAME:JSON-STRING", "Set register NAME to given JSON-STRING", ArgsManager::ALLOW_ANY, OptionsCategory::REGISTER_COMMANDS);
}
//
// 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[])
{
SetupBitcoinTxArgs(gArgs);
std::string error;
if (!gArgs.ParseParameters(argc, argv, error)) {
tfm::format(std::cerr, "Error parsing command line arguments: %s\n", error);
return EXIT_FAILURE;
}
// Check for chain settings (Params() calls are only valid after this clause)
try {
SelectParams(gArgs.GetChainType());
} catch (const std::exception& e) {
tfm::format(std::cerr, "Error: %s\n", e.what());
return EXIT_FAILURE;
}
fCreateBlank = gArgs.GetBoolArg("-create", false);
if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
// First part of help message is specific to this utility
std::string strUsage = PACKAGE_NAME " bitcoin-tx utility version " + FormatFullVersion() + "\n";
if (gArgs.IsArgSet("-version")) {
strUsage += FormatParagraph(LicenseInfo());
} else {
strUsage += "\n"
"Usage: bitcoin-tx [options] <hex-tx> [commands] Update hex-encoded bitcoin transaction\n"
"or: bitcoin-tx [options] -create [commands] Create hex-encoded bitcoin transaction\n"
"\n";
strUsage += gArgs.GetHelpMessage();
}
tfm::format(std::cout, "%s", strUsage);
if (argc < 2) {
tfm::format(std::cerr, "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 = fsbridge::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 CAmount ExtractAndValidateValue(const std::string& strValue)
{
if (std::optional<CAmount> parsed = ParseMoney(strValue)) {
return parsed.value();
} else {
throw std::runtime_error("invalid TX output value");
}
}
static void MutateTxVersion(CMutableTransaction& tx, const std::string& cmdVal)
{
uint32_t newVersion;
if (!ParseUInt32(cmdVal, &newVersion) || newVersion < 1 || newVersion > TX_MAX_STANDARD_VERSION) {
throw std::runtime_error("Invalid TX version requested: '" + cmdVal + "'");
}
tx.version = newVersion;
}
static void MutateTxLocktime(CMutableTransaction& tx, const std::string& cmdVal)
{
int64_t newLocktime;
if (!ParseInt64(cmdVal, &newLocktime) || newLocktime < 0LL || newLocktime > 0xffffffffLL)
throw std::runtime_error("Invalid TX locktime requested: '" + cmdVal + "'");
tx.nLockTime = (unsigned int) newLocktime;
}
static void MutateTxRBFOptIn(CMutableTransaction& tx, const std::string& strInIdx)
{
// parse requested index
int64_t inIdx = -1;
if (strInIdx != "" && (!ParseInt64(strInIdx, &inIdx) || inIdx < 0 || inIdx >= static_cast<int64_t>(tx.vin.size()))) {
throw std::runtime_error("Invalid TX input index '" + strInIdx + "'");
}
// set the nSequence to MAX_INT - 2 (= RBF opt in flag)
int cnt = 0;
for (CTxIn& txin : tx.vin) {
if (strInIdx == "" || cnt == inIdx) {
if (txin.nSequence > MAX_BIP125_RBF_SEQUENCE) {
txin.nSequence = MAX_BIP125_RBF_SEQUENCE;
}
}
++cnt;
}
}
template <typename T>
static T TrimAndParse(const std::string& int_str, const std::string& err)
{
const auto parsed{ToIntegral<T>(TrimStringView(int_str))};
if (!parsed.has_value()) {
throw std::runtime_error(err + " '" + int_str + "'");
}
return parsed.value();
}
static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInput)
{
std::vector<std::string> vStrInputParts = SplitString(strInput, ':');
// separate TXID:VOUT in string
if (vStrInputParts.size()<2)
throw std::runtime_error("TX input missing separator");
// extract and validate TXID
auto txid{Txid::FromHex(vStrInputParts[0])};
if (!txid) {
throw std::runtime_error("invalid TX input txid");
}
static const unsigned int minTxOutSz = 9;
static const unsigned int maxVout = MAX_BLOCK_WEIGHT / (WITNESS_SCALE_FACTOR * minTxOutSz);
// extract and validate vout
const std::string& strVout = vStrInputParts[1];
int64_t vout;
if (!ParseInt64(strVout, &vout) || vout < 0 || vout > static_cast<int64_t>(maxVout))
throw std::runtime_error("invalid TX input vout '" + strVout + "'");
// extract the optional sequence number
uint32_t nSequenceIn = CTxIn::SEQUENCE_FINAL;
if (vStrInputParts.size() > 2) {
nSequenceIn = TrimAndParse<uint32_t>(vStrInputParts.at(2), "invalid TX sequence id");
}
// 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 into VALUE:ADDRESS
std::vector<std::string> vStrInputParts = SplitString(strInput, ':');
if (vStrInputParts.size() != 2)
throw std::runtime_error("TX output missing or too many separators");
// Extract and validate VALUE
CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
// extract and validate ADDRESS
std::string strAddr = vStrInputParts[1];
CTxDestination destination = DecodeDestination(strAddr);
if (!IsValidDestination(destination)) {
throw std::runtime_error("invalid TX output address");
}
CScript scriptPubKey = GetScriptForDestination(destination);
// construct TxOut, append to transaction output list
CTxOut txout(value, scriptPubKey);
tx.vout.push_back(txout);
}
static void MutateTxAddOutPubKey(CMutableTransaction& tx, const std::string& strInput)
{
// Separate into VALUE:PUBKEY[:FLAGS]
std::vector<std::string> vStrInputParts = SplitString(strInput, ':');
if (vStrInputParts.size() < 2 || vStrInputParts.size() > 3)
throw std::runtime_error("TX output missing or too many separators");
// Extract and validate VALUE
CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
// Extract and validate PUBKEY
CPubKey pubkey(ParseHex(vStrInputParts[1]));
if (!pubkey.IsFullyValid())
throw std::runtime_error("invalid TX output pubkey");
CScript scriptPubKey = GetScriptForRawPubKey(pubkey);
// Extract and validate FLAGS
bool bSegWit = false;
bool bScriptHash = false;
if (vStrInputParts.size() == 3) {
std::string flags = vStrInputParts[2];
bSegWit = (flags.find('W') != std::string::npos);
bScriptHash = (flags.find('S') != std::string::npos);
}
if (bSegWit) {
if (!pubkey.IsCompressed()) {
throw std::runtime_error("Uncompressed pubkeys are not useable for SegWit outputs");
}
// Build a P2WPKH script
scriptPubKey = GetScriptForDestination(WitnessV0KeyHash(pubkey));
}
if (bScriptHash) {
// Get the ID for the script, and then construct a P2SH destination for it.
scriptPubKey = GetScriptForDestination(ScriptHash(scriptPubKey));
}
// construct TxOut, append to transaction output list
CTxOut txout(value, scriptPubKey);
tx.vout.push_back(txout);
}
static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& strInput)
{
// Separate into VALUE:REQUIRED:NUMKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]
std::vector<std::string> vStrInputParts = SplitString(strInput, ':');
// Check that there are enough parameters
if (vStrInputParts.size()<3)
throw std::runtime_error("Not enough multisig parameters");
// Extract and validate VALUE
CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
// Extract REQUIRED
const uint32_t required{TrimAndParse<uint32_t>(vStrInputParts.at(1), "invalid multisig required number")};
// Extract NUMKEYS
const uint32_t numkeys{TrimAndParse<uint32_t>(vStrInputParts.at(2), "invalid multisig total number")};
// Validate there are the correct number of pubkeys
if (vStrInputParts.size() < numkeys + 3)
throw std::runtime_error("incorrect number of multisig pubkeys");
if (required < 1 || required > MAX_PUBKEYS_PER_MULTISIG || numkeys < 1 || numkeys > MAX_PUBKEYS_PER_MULTISIG || numkeys < required)
throw std::runtime_error("multisig parameter mismatch. Required " \
+ ToString(required) + " of " + ToString(numkeys) + "signatures.");
// extract and validate PUBKEYs
std::vector<CPubKey> pubkeys;
for(int pos = 1; pos <= int(numkeys); pos++) {
CPubKey pubkey(ParseHex(vStrInputParts[pos + 2]));
if (!pubkey.IsFullyValid())
throw std::runtime_error("invalid TX output pubkey");
pubkeys.push_back(pubkey);
}
// Extract FLAGS
bool bSegWit = false;
bool bScriptHash = false;
if (vStrInputParts.size() == numkeys + 4) {
std::string flags = vStrInputParts.back();
bSegWit = (flags.find('W') != std::string::npos);
bScriptHash = (flags.find('S') != std::string::npos);
}
else if (vStrInputParts.size() > numkeys + 4) {
// Validate that there were no more parameters passed
throw std::runtime_error("Too many parameters");
}
CScript scriptPubKey = GetScriptForMultisig(required, pubkeys);
if (bSegWit) {
for (const CPubKey& pubkey : pubkeys) {
if (!pubkey.IsCompressed()) {
throw std::runtime_error("Uncompressed pubkeys are not useable for SegWit outputs");
}
}
// Build a P2WSH with the multisig script
scriptPubKey = GetScriptForDestination(WitnessV0ScriptHash(scriptPubKey));
}
if (bScriptHash) {
if (scriptPubKey.size() > MAX_SCRIPT_ELEMENT_SIZE) {
throw std::runtime_error(strprintf(
"redeemScript exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_ELEMENT_SIZE));
}
// Get the ID for the script, and then construct a P2SH destination for it.
scriptPubKey = GetScriptForDestination(ScriptHash(scriptPubKey));
}
// 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) {
pos = 0;
} else {
// Extract and validate VALUE
value = ExtractAndValidateValue(strInput.substr(0, pos));
++pos;
}
// extract and validate DATA
const std::string strData{strInput.substr(pos, 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[:FLAGS]
std::vector<std::string> vStrInputParts = SplitString(strInput, ':');
if (vStrInputParts.size() < 2)
throw std::runtime_error("TX output missing separator");
// Extract and validate VALUE
CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
// extract and validate script
std::string strScript = vStrInputParts[1];
CScript scriptPubKey = ParseScript(strScript);
// Extract FLAGS
bool bSegWit = false;
bool bScriptHash = false;
if (vStrInputParts.size() == 3) {
std::string flags = vStrInputParts.back();
bSegWit = (flags.find('W') != std::string::npos);
bScriptHash = (flags.find('S') != std::string::npos);
}
if (scriptPubKey.size() > MAX_SCRIPT_SIZE) {
throw std::runtime_error(strprintf(
"script exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_SIZE));
}
if (bSegWit) {
scriptPubKey = GetScriptForDestination(WitnessV0ScriptHash(scriptPubKey));
}
if (bScriptHash) {
if (scriptPubKey.size() > MAX_SCRIPT_ELEMENT_SIZE) {
throw std::runtime_error(strprintf(
"redeemScript exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_ELEMENT_SIZE));
}
scriptPubKey = GetScriptForDestination(ScriptHash(scriptPubKey));
}
// 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
int64_t inIdx;
if (!ParseInt64(strInIdx, &inIdx) || inIdx < 0 || inIdx >= static_cast<int64_t>(tx.vin.size())) {
throw std::runtime_error("Invalid TX input index '" + strInIdx + "'");
}
// delete input from transaction
tx.vin.erase(tx.vin.begin() + inIdx);
}
static void MutateTxDelOutput(CMutableTransaction& tx, const std::string& strOutIdx)
{
// parse requested deletion index
int64_t outIdx;
if (!ParseInt64(strOutIdx, &outIdx) || outIdx < 0 || outIdx >= static_cast<int64_t>(tx.vout.size())) {
throw std::runtime_error("Invalid TX output index '" + strOutIdx + "'");
}
// delete output from transaction
tx.vout.erase(tx.vout.begin() + outIdx);
}
static const unsigned int N_SIGHASH_OPTS = 7;
static const struct {
const char *flagStr;
int flags;
} sighashOptions[N_SIGHASH_OPTS] = {
{"DEFAULT", SIGHASH_DEFAULT},
{"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;
}
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 std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName)
{
std::string strHex;
if (v.isStr())
strHex = v.getValStr();
if (!IsHex(strHex))
throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')");
return ParseHex(strHex);
}
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");
// mergedTx will end up with all the signatures; it
// starts as a clone of the raw tx:
CMutableTransaction mergedTx{tx};
const CMutableTransaction txv{tx};
CCoinsView viewDummy;
CCoinsViewCache view(&viewDummy);
if (!registers.count("privatekeys"))
throw std::runtime_error("privatekeys register variable must be set.");
FillableSigningProvider 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");
CKey key = DecodeSecret(keysObj[kidx].getValStr());
if (!key.IsValid()) {
throw std::runtime_error("privatekey not valid");
}
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++) {
const UniValue& prevOut = prevtxsObj[previdx];
if (!prevOut.isObject())
throw std::runtime_error("expected prevtxs internal object");
std::map<std::string, UniValue::VType> types = {
{"txid", UniValue::VSTR},
{"vout", UniValue::VNUM},
{"scriptPubKey", UniValue::VSTR},
};
if (!prevOut.checkObject(types))
throw std::runtime_error("prevtxs internal object typecheck fail");
auto txid{Txid::FromHex(prevOut["txid"].get_str())};
if (!txid) {
throw std::runtime_error("txid must be hexadecimal string (not '" + prevOut["txid"].get_str() + "')");
}
const int nOut = prevOut["vout"].getInt<int>();
if (nOut < 0)
throw std::runtime_error("vout cannot be negative");
COutPoint out(*txid, nOut);
std::vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
CScript scriptPubKey(pkData.begin(), pkData.end());
{
const Coin& coin = view.AccessCoin(out);
if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
std::string err("Previous output scriptPubKey mismatch:\n");
err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
ScriptToAsmStr(scriptPubKey);
throw std::runtime_error(err);
}
Coin newcoin;
newcoin.out.scriptPubKey = scriptPubKey;
newcoin.out.nValue = MAX_MONEY;
if (prevOut.exists("amount")) {
newcoin.out.nValue = AmountFromValue(prevOut["amount"]);
}
newcoin.nHeight = 1;
view.AddCoin(out, std::move(newcoin), true);
}
// 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 FillableSigningProvider& 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 Coin& coin = view.AccessCoin(txin.prevout);
if (coin.IsSpent()) {
continue;
}
const CScript& prevPubKey = coin.out.scriptPubKey;
const CAmount& amount = coin.out.nValue;
SignatureData sigdata = DataFromTransaction(mergedTx, i, coin.out);
// Only sign SIGHASH_SINGLE if there's a corresponding output:
if (!fHashSingle || (i < mergedTx.vout.size()))
ProduceSignature(keystore, MutableTransactionSignatureCreator(mergedTx, i, amount, nHashType), prevPubKey, sigdata);
if (amount == MAX_MONEY && !sigdata.scriptWitness.IsNull()) {
throw std::runtime_error(strprintf("Missing amount for CTxOut with scriptPubKey=%s", HexStr(prevPubKey)));
}
UpdateInput(txin, sigdata);
}
tx = mergedTx;
}
static void MutateTx(CMutableTransaction& tx, const std::string& command,
const std::string& commandVal)
{
std::unique_ptr<ECC_Context> ecc;
if (command == "nversion")
MutateTxVersion(tx, commandVal);
else if (command == "locktime")
MutateTxLocktime(tx, commandVal);
else if (command == "replaceable") {
MutateTxRBFOptIn(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 == "outpubkey") {
ecc.reset(new ECC_Context());
MutateTxAddOutPubKey(tx, commandVal);
} else if (command == "outmultisig") {
ecc.reset(new ECC_Context());
MutateTxAddOutMultiSig(tx, commandVal);
} else if (command == "outscript")
MutateTxAddOutScript(tx, commandVal);
else if (command == "outdata")
MutateTxAddOutData(tx, commandVal);
else if (command == "sign") {
ecc.reset(new ECC_Context());
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, /*block_hash=*/uint256(), entry);
std::string jsonOutput = entry.write(4);
tfm::format(std::cout, "%s\n", jsonOutput);
}
static void OutputTxHash(const CTransaction& tx)
{
std::string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id)
tfm::format(std::cout, "%s\n", strHexHash);
}
static void OutputTxHex(const CTransaction& tx)
{
std::string strHex = EncodeHexTx(tx);
tfm::format(std::cout, "%s\n", strHex);
}
static void OutputTx(const CTransaction& tx)
{
if (gArgs.GetBoolArg("-json", false))
OutputTxJSON(tx);
else if (gArgs.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");
return TrimString(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++;
}
CMutableTransaction tx;
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(tx, strHexTx, true))
throw std::runtime_error("invalid transaction encoding");
startArg = 2;
} else
startArg = 1;
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(CTransaction(tx));
}
catch (const std::exception& e) {
strPrint = std::string("error: ") + e.what();
nRet = EXIT_FAILURE;
}
catch (...) {
PrintExceptionContinue(nullptr, "CommandLineRawTx()");
throw;
}
if (strPrint != "") {
tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint);
}
return nRet;
}
MAIN_FUNCTION
{
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(nullptr, "AppInitRawTx()");
return EXIT_FAILURE;
}
int ret = EXIT_FAILURE;
try {
ret = CommandLineRawTx(argc, argv);
}
catch (const std::exception& e) {
PrintExceptionContinue(&e, "CommandLineRawTx()");
} catch (...) {
PrintExceptionContinue(nullptr, "CommandLineRawTx()");
}
return ret;
}
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