src/bitcoin-tx.cpp

   1 // Copyright (c) 2009-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #if defined(HAVE_CONFIG_H)
   6 #include <config/bitcoin-config.h>
   7 #endif
   8
   9 #include <base58.h>
  10 #include <clientversion.h>
  11 #include <coins.h>
  12 #include <consensus/consensus.h>
  13 #include <core_io.h>
  14 #include <keystore.h>
  15 #include <policy/policy.h>
  16 #include <policy/rbf.h>
  17 #include <primitives/transaction.h>
  18 #include <script/script.h>
  19 #include <script/sign.h>
  20 #include <univalue.h>
  21 #include <util.h>
  22 #include <utilmoneystr.h>
  23 #include <utilstrencodings.h>
  24
  25 #include <stdio.h>
  26
  27 #include <boost/algorithm/string.hpp>
  28
  29 static bool fCreateBlank;
  30 static std::map<std::string,UniValue> registers;
  31 static const int CONTINUE_EXECUTION=-1;
  32
  33 //
  34 // This function returns either one of EXIT_ codes when it's expected to stop the process or
  35 // CONTINUE_EXECUTION when it's expected to continue further.
  36 //
  37 static int AppInitRawTx(int argc, char* argv[])
  38 {
  39     //
  40     // Parameters
  41     //
  42     gArgs.ParseParameters(argc, argv);
  43
  44     // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
  45     try {
  46         SelectParams(ChainNameFromCommandLine());
  47     } catch (const std::exception& e) {
  48         fprintf(stderr, "Error: %s\n", e.what());
  49         return EXIT_FAILURE;
  50     }
  51
  52     fCreateBlank = gArgs.GetBoolArg("-create", false);
  53
  54     if (argc<2 || gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help"))
  55     {
  56         // First part of help message is specific to this utility
  57         std::string strUsage = strprintf(_("%s bitcoin-tx utility version"), _(PACKAGE_NAME)) + " " + FormatFullVersion() + "\n\n" +
  58             _("Usage:") + "\n" +
  59               "  bitcoin-tx [options] <hex-tx> [commands]  " + _("Update hex-encoded bitcoin transaction") + "\n" +
  60               "  bitcoin-tx [options] -create [commands]   " + _("Create hex-encoded bitcoin transaction") + "\n" +
  61               "\n";
  62
  63         fprintf(stdout, "%s", strUsage.c_str());
  64
  65         strUsage = HelpMessageGroup(_("Options:"));
  66         strUsage += HelpMessageOpt("-?", _("This help message"));
  67         strUsage += HelpMessageOpt("-create", _("Create new, empty TX."));
  68         strUsage += HelpMessageOpt("-json", _("Select JSON output"));
  69         strUsage += HelpMessageOpt("-txid", _("Output only the hex-encoded transaction id of the resultant transaction."));
  70         AppendParamsHelpMessages(strUsage);
  71
  72         fprintf(stdout, "%s", strUsage.c_str());
  73
  74         strUsage = HelpMessageGroup(_("Commands:"));
  75         strUsage += HelpMessageOpt("delin=N", _("Delete input N from TX"));
  76         strUsage += HelpMessageOpt("delout=N", _("Delete output N from TX"));
  77         strUsage += HelpMessageOpt("in=TXID:VOUT(:SEQUENCE_NUMBER)", _("Add input to TX"));
  78         strUsage += HelpMessageOpt("locktime=N", _("Set TX lock time to N"));
  79         strUsage += HelpMessageOpt("nversion=N", _("Set TX version to N"));
  80         strUsage += HelpMessageOpt("replaceable(=N)", _("Set RBF opt-in sequence number for input N (if not provided, opt-in all available inputs)"));
  81         strUsage += HelpMessageOpt("outaddr=VALUE:ADDRESS", _("Add address-based output to TX"));
  82         strUsage += HelpMessageOpt("outpubkey=VALUE:PUBKEY[:FLAGS]", _("Add pay-to-pubkey output to TX") + ". " +
  83             _("Optionally add the \"W\" flag to produce a pay-to-witness-pubkey-hash output") + ". " +
  84             _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
  85         strUsage += HelpMessageOpt("outdata=[VALUE:]DATA", _("Add data-based output to TX"));
  86         strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT[:FLAGS]", _("Add raw script output to TX") + ". " +
  87             _("Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output") + ". " +
  88             _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
  89         strUsage += HelpMessageOpt("outmultisig=VALUE:REQUIRED:PUBKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]", _("Add Pay To n-of-m Multi-sig output to TX. n = REQUIRED, m = PUBKEYS") + ". " +
  90             _("Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output") + ". " +
  91             _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
  92         strUsage += HelpMessageOpt("sign=SIGHASH-FLAGS", _("Add zero or more signatures to transaction") + ". " +
  93             _("This command requires JSON registers:") +
  94             _("prevtxs=JSON object") + ", " +
  95             _("privatekeys=JSON object") + ". " +
  96             _("See signrawtransaction docs for format of sighash flags, JSON objects."));
  97         fprintf(stdout, "%s", strUsage.c_str());
  98
  99         strUsage = HelpMessageGroup(_("Register Commands:"));
 100         strUsage += HelpMessageOpt("load=NAME:FILENAME", _("Load JSON file FILENAME into register NAME"));
 101         strUsage += HelpMessageOpt("set=NAME:JSON-STRING", _("Set register NAME to given JSON-STRING"));
 102         fprintf(stdout, "%s", strUsage.c_str());
 103
 104         if (argc < 2) {
 105             fprintf(stderr, "Error: too few parameters\n");
 106             return EXIT_FAILURE;
 107         }
 108         return EXIT_SUCCESS;
 109     }
 110     return CONTINUE_EXECUTION;
 111 }
 112
 113 static void RegisterSetJson(const std::string& key, const std::string& rawJson)
 114 {
 115     UniValue val;
 116     if (!val.read(rawJson)) {
 117         std::string strErr = "Cannot parse JSON for key " + key;
 118         throw std::runtime_error(strErr);
 119     }
 120
 121     registers[key] = val;
 122 }
 123
 124 static void RegisterSet(const std::string& strInput)
 125 {
 126     // separate NAME:VALUE in string
 127     size_t pos = strInput.find(':');
 128     if ((pos == std::string::npos) ||
 129         (pos == 0) ||
 130         (pos == (strInput.size() - 1)))
 131         throw std::runtime_error("Register input requires NAME:VALUE");
 132
 133     std::string key = strInput.substr(0, pos);
 134     std::string valStr = strInput.substr(pos + 1, std::string::npos);
 135
 136     RegisterSetJson(key, valStr);
 137 }
 138
 139 static void RegisterLoad(const std::string& strInput)
 140 {
 141     // separate NAME:FILENAME in string
 142     size_t pos = strInput.find(':');
 143     if ((pos == std::string::npos) ||
 144         (pos == 0) ||
 145         (pos == (strInput.size() - 1)))
 146         throw std::runtime_error("Register load requires NAME:FILENAME");
 147
 148     std::string key = strInput.substr(0, pos);
 149     std::string filename = strInput.substr(pos + 1, std::string::npos);
 150
 151     FILE *f = fopen(filename.c_str(), "r");
 152     if (!f) {
 153         std::string strErr = "Cannot open file " + filename;
 154         throw std::runtime_error(strErr);
 155     }
 156
 157     // load file chunks into one big buffer
 158     std::string valStr;
 159     while ((!feof(f)) && (!ferror(f))) {
 160         char buf[4096];
 161         int bread = fread(buf, 1, sizeof(buf), f);
 162         if (bread <= 0)
 163             break;
 164
 165         valStr.insert(valStr.size(), buf, bread);
 166     }
 167
 168     int error = ferror(f);
 169     fclose(f);
 170
 171     if (error) {
 172         std::string strErr = "Error reading file " + filename;
 173         throw std::runtime_error(strErr);
 174     }
 175
 176     // evaluate as JSON buffer register
 177     RegisterSetJson(key, valStr);
 178 }
 179
 180 static CAmount ExtractAndValidateValue(const std::string& strValue)
 181 {
 182     CAmount value;
 183     if (!ParseMoney(strValue, value))
 184         throw std::runtime_error("invalid TX output value");
 185     return value;
 186 }
 187
 188 static void MutateTxVersion(CMutableTransaction& tx, const std::string& cmdVal)
 189 {
 190     int64_t newVersion = atoi64(cmdVal);
 191     if (newVersion < 1 || newVersion > CTransaction::MAX_STANDARD_VERSION)
 192         throw std::runtime_error("Invalid TX version requested");
 193
 194     tx.nVersion = (int) newVersion;
 195 }
 196
 197 static void MutateTxLocktime(CMutableTransaction& tx, const std::string& cmdVal)
 198 {
 199     int64_t newLocktime = atoi64(cmdVal);
 200     if (newLocktime < 0LL || newLocktime > 0xffffffffLL)
 201         throw std::runtime_error("Invalid TX locktime requested");
 202
 203     tx.nLockTime = (unsigned int) newLocktime;
 204 }
 205
 206 static void MutateTxRBFOptIn(CMutableTransaction& tx, const std::string& strInIdx)
 207 {
 208     // parse requested index
 209     int inIdx = atoi(strInIdx);
 210     if (inIdx < 0 || inIdx >= (int)tx.vin.size()) {
 211         throw std::runtime_error("Invalid TX input index '" + strInIdx + "'");
 212     }
 213
 214     // set the nSequence to MAX_INT - 2 (= RBF opt in flag)
 215     int cnt = 0;
 216     for (CTxIn& txin : tx.vin) {
 217         if (strInIdx == "" || cnt == inIdx) {
 218             if (txin.nSequence > MAX_BIP125_RBF_SEQUENCE) {
 219                 txin.nSequence = MAX_BIP125_RBF_SEQUENCE;
 220             }
 221         }
 222         ++cnt;
 223     }
 224 }
 225
 226 static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInput)
 227 {
 228     std::vector<std::string> vStrInputParts;
 229     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 230
 231     // separate TXID:VOUT in string
 232     if (vStrInputParts.size()<2)
 233         throw std::runtime_error("TX input missing separator");
 234
 235     // extract and validate TXID
 236     std::string strTxid = vStrInputParts[0];
 237     if ((strTxid.size() != 64) || !IsHex(strTxid))
 238         throw std::runtime_error("invalid TX input txid");
 239     uint256 txid(uint256S(strTxid));
 240
 241     static const unsigned int minTxOutSz = 9;
 242     static const unsigned int maxVout = MAX_BLOCK_WEIGHT / (WITNESS_SCALE_FACTOR * minTxOutSz);
 243
 244     // extract and validate vout
 245     std::string strVout = vStrInputParts[1];
 246     int vout = atoi(strVout);
 247     if ((vout < 0) || (vout > (int)maxVout))
 248         throw std::runtime_error("invalid TX input vout");
 249
 250     // extract the optional sequence number
 251     uint32_t nSequenceIn=std::numeric_limits<unsigned int>::max();
 252     if (vStrInputParts.size() > 2)
 253         nSequenceIn = std::stoul(vStrInputParts[2]);
 254
 255     // append to transaction input list
 256     CTxIn txin(txid, vout, CScript(), nSequenceIn);
 257     tx.vin.push_back(txin);
 258 }
 259
 260 static void MutateTxAddOutAddr(CMutableTransaction& tx, const std::string& strInput)
 261 {
 262     // Separate into VALUE:ADDRESS
 263     std::vector<std::string> vStrInputParts;
 264     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 265
 266     if (vStrInputParts.size() != 2)
 267         throw std::runtime_error("TX output missing or too many separators");
 268
 269     // Extract and validate VALUE
 270     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 271
 272     // extract and validate ADDRESS
 273     std::string strAddr = vStrInputParts[1];
 274     CTxDestination destination = DecodeDestination(strAddr);
 275     if (!IsValidDestination(destination)) {
 276         throw std::runtime_error("invalid TX output address");
 277     }
 278     CScript scriptPubKey = GetScriptForDestination(destination);
 279
 280     // construct TxOut, append to transaction output list
 281     CTxOut txout(value, scriptPubKey);
 282     tx.vout.push_back(txout);
 283 }
 284
 285 static void MutateTxAddOutPubKey(CMutableTransaction& tx, const std::string& strInput)
 286 {
 287     // Separate into VALUE:PUBKEY[:FLAGS]
 288     std::vector<std::string> vStrInputParts;
 289     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 290
 291     if (vStrInputParts.size() < 2 || vStrInputParts.size() > 3)
 292         throw std::runtime_error("TX output missing or too many separators");
 293
 294     // Extract and validate VALUE
 295     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 296
 297     // Extract and validate PUBKEY
 298     CPubKey pubkey(ParseHex(vStrInputParts[1]));
 299     if (!pubkey.IsFullyValid())
 300         throw std::runtime_error("invalid TX output pubkey");
 301     CScript scriptPubKey = GetScriptForRawPubKey(pubkey);
 302
 303     // Extract and validate FLAGS
 304     bool bSegWit = false;
 305     bool bScriptHash = false;
 306     if (vStrInputParts.size() == 3) {
 307         std::string flags = vStrInputParts[2];
 308         bSegWit = (flags.find("W") != std::string::npos);
 309         bScriptHash = (flags.find("S") != std::string::npos);
 310     }
 311
 312     if (bSegWit) {
 313         if (!pubkey.IsCompressed()) {
 314             throw std::runtime_error("Uncompressed pubkeys are not useable for SegWit outputs");
 315         }
 316         // Call GetScriptForWitness() to build a P2WSH scriptPubKey
 317         scriptPubKey = GetScriptForWitness(scriptPubKey);
 318     }
 319     if (bScriptHash) {
 320         // Get the ID for the script, and then construct a P2SH destination for it.
 321         scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
 322     }
 323
 324     // construct TxOut, append to transaction output list
 325     CTxOut txout(value, scriptPubKey);
 326     tx.vout.push_back(txout);
 327 }
 328
 329 static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& strInput)
 330 {
 331     // Separate into VALUE:REQUIRED:NUMKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]
 332     std::vector<std::string> vStrInputParts;
 333     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 334
 335     // Check that there are enough parameters
 336     if (vStrInputParts.size()<3)
 337         throw std::runtime_error("Not enough multisig parameters");
 338
 339     // Extract and validate VALUE
 340     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 341
 342     // Extract REQUIRED
 343     uint32_t required = stoul(vStrInputParts[1]);
 344
 345     // Extract NUMKEYS
 346     uint32_t numkeys = stoul(vStrInputParts[2]);
 347
 348     // Validate there are the correct number of pubkeys
 349     if (vStrInputParts.size() < numkeys + 3)
 350         throw std::runtime_error("incorrect number of multisig pubkeys");
 351
 352     if (required < 1 || required > 20 || numkeys < 1 || numkeys > 20 || numkeys < required)
 353         throw std::runtime_error("multisig parameter mismatch. Required " \
 354                             + std::to_string(required) + " of " + std::to_string(numkeys) + "signatures.");
 355
 356     // extract and validate PUBKEYs
 357     std::vector<CPubKey> pubkeys;
 358     for(int pos = 1; pos <= int(numkeys); pos++) {
 359         CPubKey pubkey(ParseHex(vStrInputParts[pos + 2]));
 360         if (!pubkey.IsFullyValid())
 361             throw std::runtime_error("invalid TX output pubkey");
 362         pubkeys.push_back(pubkey);
 363     }
 364
 365     // Extract FLAGS
 366     bool bSegWit = false;
 367     bool bScriptHash = false;
 368     if (vStrInputParts.size() == numkeys + 4) {
 369         std::string flags = vStrInputParts.back();
 370         bSegWit = (flags.find("W") != std::string::npos);
 371         bScriptHash = (flags.find("S") != std::string::npos);
 372     }
 373     else if (vStrInputParts.size() > numkeys + 4) {
 374         // Validate that there were no more parameters passed
 375         throw std::runtime_error("Too many parameters");
 376     }
 377
 378     CScript scriptPubKey = GetScriptForMultisig(required, pubkeys);
 379
 380     if (bSegWit) {
 381         for (CPubKey& pubkey : pubkeys) {
 382             if (!pubkey.IsCompressed()) {
 383                 throw std::runtime_error("Uncompressed pubkeys are not useable for SegWit outputs");
 384             }
 385         }
 386         // Call GetScriptForWitness() to build a P2WSH scriptPubKey
 387         scriptPubKey = GetScriptForWitness(scriptPubKey);
 388     }
 389     if (bScriptHash) {
 390         if (scriptPubKey.size() > MAX_SCRIPT_ELEMENT_SIZE) {
 391             throw std::runtime_error(strprintf(
 392                         "redeemScript exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_ELEMENT_SIZE));
 393         }
 394         // Get the ID for the script, and then construct a P2SH destination for it.
 395         scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
 396     }
 397
 398     // construct TxOut, append to transaction output list
 399     CTxOut txout(value, scriptPubKey);
 400     tx.vout.push_back(txout);
 401 }
 402
 403 static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strInput)
 404 {
 405     CAmount value = 0;
 406
 407     // separate [VALUE:]DATA in string
 408     size_t pos = strInput.find(':');
 409
 410     if (pos==0)
 411         throw std::runtime_error("TX output value not specified");
 412
 413     if (pos != std::string::npos) {
 414         // Extract and validate VALUE
 415         value = ExtractAndValidateValue(strInput.substr(0, pos));
 416     }
 417
 418     // extract and validate DATA
 419     std::string strData = strInput.substr(pos + 1, std::string::npos);
 420
 421     if (!IsHex(strData))
 422         throw std::runtime_error("invalid TX output data");
 423
 424     std::vector<unsigned char> data = ParseHex(strData);
 425
 426     CTxOut txout(value, CScript() << OP_RETURN << data);
 427     tx.vout.push_back(txout);
 428 }
 429
 430 static void MutateTxAddOutScript(CMutableTransaction& tx, const std::string& strInput)
 431 {
 432     // separate VALUE:SCRIPT[:FLAGS]
 433     std::vector<std::string> vStrInputParts;
 434     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 435     if (vStrInputParts.size() < 2)
 436         throw std::runtime_error("TX output missing separator");
 437
 438     // Extract and validate VALUE
 439     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 440
 441     // extract and validate script
 442     std::string strScript = vStrInputParts[1];
 443     CScript scriptPubKey = ParseScript(strScript);
 444
 445     // Extract FLAGS
 446     bool bSegWit = false;
 447     bool bScriptHash = false;
 448     if (vStrInputParts.size() == 3) {
 449         std::string flags = vStrInputParts.back();
 450         bSegWit = (flags.find("W") != std::string::npos);
 451         bScriptHash = (flags.find("S") != std::string::npos);
 452     }
 453
 454     if (scriptPubKey.size() > MAX_SCRIPT_SIZE) {
 455         throw std::runtime_error(strprintf(
 456                     "script exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_SIZE));
 457     }
 458
 459     if (bSegWit) {
 460         scriptPubKey = GetScriptForWitness(scriptPubKey);
 461     }
 462     if (bScriptHash) {
 463         if (scriptPubKey.size() > MAX_SCRIPT_ELEMENT_SIZE) {
 464             throw std::runtime_error(strprintf(
 465                         "redeemScript exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_ELEMENT_SIZE));
 466         }
 467         scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
 468     }
 469
 470     // construct TxOut, append to transaction output list
 471     CTxOut txout(value, scriptPubKey);
 472     tx.vout.push_back(txout);
 473 }
 474
 475 static void MutateTxDelInput(CMutableTransaction& tx, const std::string& strInIdx)
 476 {
 477     // parse requested deletion index
 478     int inIdx = atoi(strInIdx);
 479     if (inIdx < 0 || inIdx >= (int)tx.vin.size()) {
 480         std::string strErr = "Invalid TX input index '" + strInIdx + "'";
 481         throw std::runtime_error(strErr.c_str());
 482     }
 483
 484     // delete input from transaction
 485     tx.vin.erase(tx.vin.begin() + inIdx);
 486 }
 487
 488 static void MutateTxDelOutput(CMutableTransaction& tx, const std::string& strOutIdx)
 489 {
 490     // parse requested deletion index
 491     int outIdx = atoi(strOutIdx);
 492     if (outIdx < 0 || outIdx >= (int)tx.vout.size()) {
 493         std::string strErr = "Invalid TX output index '" + strOutIdx + "'";
 494         throw std::runtime_error(strErr.c_str());
 495     }
 496
 497     // delete output from transaction
 498     tx.vout.erase(tx.vout.begin() + outIdx);
 499 }
 500
 501 static const unsigned int N_SIGHASH_OPTS = 6;
 502 static const struct {
 503     const char *flagStr;
 504     int flags;
 505 } sighashOptions[N_SIGHASH_OPTS] = {
 506     {"ALL", SIGHASH_ALL},
 507     {"NONE", SIGHASH_NONE},
 508     {"SINGLE", SIGHASH_SINGLE},
 509     {"ALL|ANYONECANPAY", SIGHASH_ALL|SIGHASH_ANYONECANPAY},
 510     {"NONE|ANYONECANPAY", SIGHASH_NONE|SIGHASH_ANYONECANPAY},
 511     {"SINGLE|ANYONECANPAY", SIGHASH_SINGLE|SIGHASH_ANYONECANPAY},
 512 };
 513
 514 static bool findSighashFlags(int& flags, const std::string& flagStr)
 515 {
 516     flags = 0;
 517
 518     for (unsigned int i = 0; i < N_SIGHASH_OPTS; i++) {
 519         if (flagStr == sighashOptions[i].flagStr) {
 520             flags = sighashOptions[i].flags;
 521             return true;
 522         }
 523     }
 524
 525     return false;
 526 }
 527
 528 static CAmount AmountFromValue(const UniValue& value)
 529 {
 530     if (!value.isNum() && !value.isStr())
 531         throw std::runtime_error("Amount is not a number or string");
 532     CAmount amount;
 533     if (!ParseFixedPoint(value.getValStr(), 8, &amount))
 534         throw std::runtime_error("Invalid amount");
 535     if (!MoneyRange(amount))
 536         throw std::runtime_error("Amount out of range");
 537     return amount;
 538 }
 539
 540 static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
 541 {
 542     int nHashType = SIGHASH_ALL;
 543
 544     if (flagStr.size() > 0)
 545         if (!findSighashFlags(nHashType, flagStr))
 546             throw std::runtime_error("unknown sighash flag/sign option");
 547
 548     std::vector<CTransaction> txVariants;
 549     txVariants.push_back(tx);
 550
 551     // mergedTx will end up with all the signatures; it
 552     // starts as a clone of the raw tx:
 553     CMutableTransaction mergedTx(txVariants[0]);
 554     bool fComplete = true;
 555     CCoinsView viewDummy;
 556     CCoinsViewCache view(&viewDummy);
 557
 558     if (!registers.count("privatekeys"))
 559         throw std::runtime_error("privatekeys register variable must be set.");
 560     CBasicKeyStore tempKeystore;
 561     UniValue keysObj = registers["privatekeys"];
 562
 563     for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
 564         if (!keysObj[kidx].isStr())
 565             throw std::runtime_error("privatekey not a std::string");
 566         CBitcoinSecret vchSecret;
 567         bool fGood = vchSecret.SetString(keysObj[kidx].getValStr());
 568         if (!fGood)
 569             throw std::runtime_error("privatekey not valid");
 570
 571         CKey key = vchSecret.GetKey();
 572         tempKeystore.AddKey(key);
 573     }
 574
 575     // Add previous txouts given in the RPC call:
 576     if (!registers.count("prevtxs"))
 577         throw std::runtime_error("prevtxs register variable must be set.");
 578     UniValue prevtxsObj = registers["prevtxs"];
 579     {
 580         for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) {
 581             UniValue prevOut = prevtxsObj[previdx];
 582             if (!prevOut.isObject())
 583                 throw std::runtime_error("expected prevtxs internal object");
 584
 585             std::map<std::string, UniValue::VType> types = {
 586                 {"txid", UniValue::VSTR},
 587                 {"vout", UniValue::VNUM},
 588                 {"scriptPubKey", UniValue::VSTR},
 589             };
 590             if (!prevOut.checkObject(types))
 591                 throw std::runtime_error("prevtxs internal object typecheck fail");
 592
 593             uint256 txid = ParseHashUV(prevOut["txid"], "txid");
 594
 595             int nOut = atoi(prevOut["vout"].getValStr());
 596             if (nOut < 0)
 597                 throw std::runtime_error("vout must be positive");
 598
 599             COutPoint out(txid, nOut);
 600             std::vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
 601             CScript scriptPubKey(pkData.begin(), pkData.end());
 602
 603             {
 604                 const Coin& coin = view.AccessCoin(out);
 605                 if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
 606                     std::string err("Previous output scriptPubKey mismatch:\n");
 607                     err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
 608                         ScriptToAsmStr(scriptPubKey);
 609                     throw std::runtime_error(err);
 610                 }
 611                 Coin newcoin;
 612                 newcoin.out.scriptPubKey = scriptPubKey;
 613                 newcoin.out.nValue = 0;
 614                 if (prevOut.exists("amount")) {
 615                     newcoin.out.nValue = AmountFromValue(prevOut["amount"]);
 616                 }
 617                 newcoin.nHeight = 1;
 618                 view.AddCoin(out, std::move(newcoin), true);
 619             }
 620
 621             // if redeemScript given and private keys given,
 622             // add redeemScript to the tempKeystore so it can be signed:
 623             if ((scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) &&
 624                 prevOut.exists("redeemScript")) {
 625                 UniValue v = prevOut["redeemScript"];
 626                 std::vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
 627                 CScript redeemScript(rsData.begin(), rsData.end());
 628                 tempKeystore.AddCScript(redeemScript);
 629             }
 630         }
 631     }
 632
 633     const CKeyStore& keystore = tempKeystore;
 634
 635     bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);
 636
 637     // Sign what we can:
 638     for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
 639         CTxIn& txin = mergedTx.vin[i];
 640         const Coin& coin = view.AccessCoin(txin.prevout);
 641         if (coin.IsSpent()) {
 642             fComplete = false;
 643             continue;
 644         }
 645         const CScript& prevPubKey = coin.out.scriptPubKey;
 646         const CAmount& amount = coin.out.nValue;
 647
 648         SignatureData sigdata;
 649         // Only sign SIGHASH_SINGLE if there's a corresponding output:
 650         if (!fHashSingle || (i < mergedTx.vout.size()))
 651             ProduceSignature(MutableTransactionSignatureCreator(&keystore, &mergedTx, i, amount, nHashType), prevPubKey, sigdata);
 652
 653         // ... and merge in other signatures:
 654         for (const CTransaction& txv : txVariants)
 655             sigdata = CombineSignatures(prevPubKey, MutableTransactionSignatureChecker(&mergedTx, i, amount), sigdata, DataFromTransaction(txv, i));
 656         UpdateTransaction(mergedTx, i, sigdata);
 657
 658         if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i, amount)))
 659             fComplete = false;
 660     }
 661
 662     if (fComplete) {
 663         // do nothing... for now
 664         // perhaps store this for later optional JSON output
 665     }
 666
 667     tx = mergedTx;
 668 }
 669
 670 class Secp256k1Init
 671 {
 672     ECCVerifyHandle globalVerifyHandle;
 673
 674 public:
 675     Secp256k1Init() {
 676         ECC_Start();
 677     }
 678     ~Secp256k1Init() {
 679         ECC_Stop();
 680     }
 681 };
 682
 683 static void MutateTx(CMutableTransaction& tx, const std::string& command,
 684                      const std::string& commandVal)
 685 {
 686     std::unique_ptr<Secp256k1Init> ecc;
 687
 688     if (command == "nversion")
 689         MutateTxVersion(tx, commandVal);
 690     else if (command == "locktime")
 691         MutateTxLocktime(tx, commandVal);
 692     else if (command == "replaceable") {
 693         MutateTxRBFOptIn(tx, commandVal);
 694     }
 695
 696     else if (command == "delin")
 697         MutateTxDelInput(tx, commandVal);
 698     else if (command == "in")
 699         MutateTxAddInput(tx, commandVal);
 700
 701     else if (command == "delout")
 702         MutateTxDelOutput(tx, commandVal);
 703     else if (command == "outaddr")
 704         MutateTxAddOutAddr(tx, commandVal);
 705     else if (command == "outpubkey") {
 706         ecc.reset(new Secp256k1Init());
 707         MutateTxAddOutPubKey(tx, commandVal);
 708     } else if (command == "outmultisig") {
 709         ecc.reset(new Secp256k1Init());
 710         MutateTxAddOutMultiSig(tx, commandVal);
 711     } else if (command == "outscript")
 712         MutateTxAddOutScript(tx, commandVal);
 713     else if (command == "outdata")
 714         MutateTxAddOutData(tx, commandVal);
 715
 716     else if (command == "sign") {
 717         ecc.reset(new Secp256k1Init());
 718         MutateTxSign(tx, commandVal);
 719     }
 720
 721     else if (command == "load")
 722         RegisterLoad(commandVal);
 723
 724     else if (command == "set")
 725         RegisterSet(commandVal);
 726
 727     else
 728         throw std::runtime_error("unknown command");
 729 }
 730
 731 static void OutputTxJSON(const CTransaction& tx)
 732 {
 733     UniValue entry(UniValue::VOBJ);
 734     TxToUniv(tx, uint256(), entry);
 735
 736     std::string jsonOutput = entry.write(4);
 737     fprintf(stdout, "%s\n", jsonOutput.c_str());
 738 }
 739
 740 static void OutputTxHash(const CTransaction& tx)
 741 {
 742     std::string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id)
 743
 744     fprintf(stdout, "%s\n", strHexHash.c_str());
 745 }
 746
 747 static void OutputTxHex(const CTransaction& tx)
 748 {
 749     std::string strHex = EncodeHexTx(tx);
 750
 751     fprintf(stdout, "%s\n", strHex.c_str());
 752 }
 753
 754 static void OutputTx(const CTransaction& tx)
 755 {
 756     if (gArgs.GetBoolArg("-json", false))
 757         OutputTxJSON(tx);
 758     else if (gArgs.GetBoolArg("-txid", false))
 759         OutputTxHash(tx);
 760     else
 761         OutputTxHex(tx);
 762 }
 763
 764 static std::string readStdin()
 765 {
 766     char buf[4096];
 767     std::string ret;
 768
 769     while (!feof(stdin)) {
 770         size_t bread = fread(buf, 1, sizeof(buf), stdin);
 771         ret.append(buf, bread);
 772         if (bread < sizeof(buf))
 773             break;
 774     }
 775
 776     if (ferror(stdin))
 777         throw std::runtime_error("error reading stdin");
 778
 779     boost::algorithm::trim_right(ret);
 780
 781     return ret;
 782 }
 783
 784 static int CommandLineRawTx(int argc, char* argv[])
 785 {
 786     std::string strPrint;
 787     int nRet = 0;
 788     try {
 789         // Skip switches; Permit common stdin convention "-"
 790         while (argc > 1 && IsSwitchChar(argv[1][0]) &&
 791                (argv[1][1] != 0)) {
 792             argc--;
 793             argv++;
 794         }
 795
 796         CMutableTransaction tx;
 797         int startArg;
 798
 799         if (!fCreateBlank) {
 800             // require at least one param
 801             if (argc < 2)
 802                 throw std::runtime_error("too few parameters");
 803
 804             // param: hex-encoded bitcoin transaction
 805             std::string strHexTx(argv[1]);
 806             if (strHexTx == "-")                 // "-" implies standard input
 807                 strHexTx = readStdin();
 808
 809             if (!DecodeHexTx(tx, strHexTx, true))
 810                 throw std::runtime_error("invalid transaction encoding");
 811
 812             startArg = 2;
 813         } else
 814             startArg = 1;
 815
 816         for (int i = startArg; i < argc; i++) {
 817             std::string arg = argv[i];
 818             std::string key, value;
 819             size_t eqpos = arg.find('=');
 820             if (eqpos == std::string::npos)
 821                 key = arg;
 822             else {
 823                 key = arg.substr(0, eqpos);
 824                 value = arg.substr(eqpos + 1);
 825             }
 826
 827             MutateTx(tx, key, value);
 828         }
 829
 830         OutputTx(tx);
 831     }
 832
 833     catch (const boost::thread_interrupted&) {
 834         throw;
 835     }
 836     catch (const std::exception& e) {
 837         strPrint = std::string("error: ") + e.what();
 838         nRet = EXIT_FAILURE;
 839     }
 840     catch (...) {
 841         PrintExceptionContinue(nullptr, "CommandLineRawTx()");
 842         throw;
 843     }
 844
 845     if (strPrint != "") {
 846         fprintf((nRet == 0 ? stdout : stderr), "%s\n", strPrint.c_str());
 847     }
 848     return nRet;
 849 }
 850
 851 int main(int argc, char* argv[])
 852 {
 853     SetupEnvironment();
 854
 855     try {
 856         int ret = AppInitRawTx(argc, argv);
 857         if (ret != CONTINUE_EXECUTION)
 858             return ret;
 859     }
 860     catch (const std::exception& e) {
 861         PrintExceptionContinue(&e, "AppInitRawTx()");
 862         return EXIT_FAILURE;
 863     } catch (...) {
 864         PrintExceptionContinue(nullptr, "AppInitRawTx()");
 865         return EXIT_FAILURE;
 866     }
 867
 868     int ret = EXIT_FAILURE;
 869     try {
 870         ret = CommandLineRawTx(argc, argv);
 871     }
 872     catch (const std::exception& e) {
 873         PrintExceptionContinue(&e, "CommandLineRawTx()");
 874     } catch (...) {
 875         PrintExceptionContinue(nullptr, "CommandLineRawTx()");
 876     }
 877     return ret;
 878 }