src/bitcoin-tx.cpp

   1 // Copyright (c) 2009-2016 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     CBitcoinAddress addr(strAddr);
 275     if (!addr.IsValid())
 276         throw std::runtime_error("invalid TX output address");
 277     // build standard output script via GetScriptForDestination()
 278     CScript scriptPubKey = GetScriptForDestination(addr.Get());
 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         // Call GetScriptForWitness() to build a P2WSH scriptPubKey
 314         scriptPubKey = GetScriptForWitness(scriptPubKey);
 315     }
 316     if (bScriptHash) {
 317         // Get the address for the redeem script, then call
 318         // GetScriptForDestination() to construct a P2SH scriptPubKey.
 319         CBitcoinAddress redeemScriptAddr(scriptPubKey);
 320         scriptPubKey = GetScriptForDestination(redeemScriptAddr.Get());
 321     }
 322
 323     // construct TxOut, append to transaction output list
 324     CTxOut txout(value, scriptPubKey);
 325     tx.vout.push_back(txout);
 326 }
 327
 328 static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& strInput)
 329 {
 330     // Separate into VALUE:REQUIRED:NUMKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]
 331     std::vector<std::string> vStrInputParts;
 332     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 333
 334     // Check that there are enough parameters
 335     if (vStrInputParts.size()<3)
 336         throw std::runtime_error("Not enough multisig parameters");
 337
 338     // Extract and validate VALUE
 339     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 340
 341     // Extract REQUIRED
 342     uint32_t required = stoul(vStrInputParts[1]);
 343
 344     // Extract NUMKEYS
 345     uint32_t numkeys = stoul(vStrInputParts[2]);
 346
 347     // Validate there are the correct number of pubkeys
 348     if (vStrInputParts.size() < numkeys + 3)
 349         throw std::runtime_error("incorrect number of multisig pubkeys");
 350
 351     if (required < 1 || required > 20 || numkeys < 1 || numkeys > 20 || numkeys < required)
 352         throw std::runtime_error("multisig parameter mismatch. Required " \
 353                             + std::to_string(required) + " of " + std::to_string(numkeys) + "signatures.");
 354
 355     // extract and validate PUBKEYs
 356     std::vector<CPubKey> pubkeys;
 357     for(int pos = 1; pos <= int(numkeys); pos++) {
 358         CPubKey pubkey(ParseHex(vStrInputParts[pos + 2]));
 359         if (!pubkey.IsFullyValid())
 360             throw std::runtime_error("invalid TX output pubkey");
 361         pubkeys.push_back(pubkey);
 362     }
 363
 364     // Extract FLAGS
 365     bool bSegWit = false;
 366     bool bScriptHash = false;
 367     if (vStrInputParts.size() == numkeys + 4) {
 368         std::string flags = vStrInputParts.back();
 369         bSegWit = (flags.find("W") != std::string::npos);
 370         bScriptHash = (flags.find("S") != std::string::npos);
 371     }
 372     else if (vStrInputParts.size() > numkeys + 4) {
 373         // Validate that there were no more parameters passed
 374         throw std::runtime_error("Too many parameters");
 375     }
 376
 377     CScript scriptPubKey = GetScriptForMultisig(required, pubkeys);
 378
 379     if (bSegWit) {
 380         // Call GetScriptForWitness() to build a P2WSH scriptPubKey
 381         scriptPubKey = GetScriptForWitness(scriptPubKey);
 382     }
 383     if (bScriptHash) {
 384         // Get the address for the redeem script, then call
 385         // GetScriptForDestination() to construct a P2SH scriptPubKey.
 386         CBitcoinAddress addr(scriptPubKey);
 387         scriptPubKey = GetScriptForDestination(addr.Get());
 388     }
 389
 390     // construct TxOut, append to transaction output list
 391     CTxOut txout(value, scriptPubKey);
 392     tx.vout.push_back(txout);
 393 }
 394
 395 static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strInput)
 396 {
 397     CAmount value = 0;
 398
 399     // separate [VALUE:]DATA in string
 400     size_t pos = strInput.find(':');
 401
 402     if (pos==0)
 403         throw std::runtime_error("TX output value not specified");
 404
 405     if (pos != std::string::npos) {
 406         // Extract and validate VALUE
 407         value = ExtractAndValidateValue(strInput.substr(0, pos));
 408     }
 409
 410     // extract and validate DATA
 411     std::string strData = strInput.substr(pos + 1, std::string::npos);
 412
 413     if (!IsHex(strData))
 414         throw std::runtime_error("invalid TX output data");
 415
 416     std::vector<unsigned char> data = ParseHex(strData);
 417
 418     CTxOut txout(value, CScript() << OP_RETURN << data);
 419     tx.vout.push_back(txout);
 420 }
 421
 422 static void MutateTxAddOutScript(CMutableTransaction& tx, const std::string& strInput)
 423 {
 424     // separate VALUE:SCRIPT[:FLAGS]
 425     std::vector<std::string> vStrInputParts;
 426     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 427     if (vStrInputParts.size() < 2)
 428         throw std::runtime_error("TX output missing separator");
 429
 430     // Extract and validate VALUE
 431     CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
 432
 433     // extract and validate script
 434     std::string strScript = vStrInputParts[1];
 435     CScript scriptPubKey = ParseScript(strScript);
 436
 437     // Extract FLAGS
 438     bool bSegWit = false;
 439     bool bScriptHash = false;
 440     if (vStrInputParts.size() == 3) {
 441         std::string flags = vStrInputParts.back();
 442         bSegWit = (flags.find("W") != std::string::npos);
 443         bScriptHash = (flags.find("S") != std::string::npos);
 444     }
 445
 446     if (bSegWit) {
 447       scriptPubKey = GetScriptForWitness(scriptPubKey);
 448     }
 449     if (bScriptHash) {
 450       CBitcoinAddress addr(scriptPubKey);
 451       scriptPubKey = GetScriptForDestination(addr.Get());
 452     }
 453
 454     // construct TxOut, append to transaction output list
 455     CTxOut txout(value, scriptPubKey);
 456     tx.vout.push_back(txout);
 457 }
 458
 459 static void MutateTxDelInput(CMutableTransaction& tx, const std::string& strInIdx)
 460 {
 461     // parse requested deletion index
 462     int inIdx = atoi(strInIdx);
 463     if (inIdx < 0 || inIdx >= (int)tx.vin.size()) {
 464         std::string strErr = "Invalid TX input index '" + strInIdx + "'";
 465         throw std::runtime_error(strErr.c_str());
 466     }
 467
 468     // delete input from transaction
 469     tx.vin.erase(tx.vin.begin() + inIdx);
 470 }
 471
 472 static void MutateTxDelOutput(CMutableTransaction& tx, const std::string& strOutIdx)
 473 {
 474     // parse requested deletion index
 475     int outIdx = atoi(strOutIdx);
 476     if (outIdx < 0 || outIdx >= (int)tx.vout.size()) {
 477         std::string strErr = "Invalid TX output index '" + strOutIdx + "'";
 478         throw std::runtime_error(strErr.c_str());
 479     }
 480
 481     // delete output from transaction
 482     tx.vout.erase(tx.vout.begin() + outIdx);
 483 }
 484
 485 static const unsigned int N_SIGHASH_OPTS = 6;
 486 static const struct {
 487     const char *flagStr;
 488     int flags;
 489 } sighashOptions[N_SIGHASH_OPTS] = {
 490     {"ALL", SIGHASH_ALL},
 491     {"NONE", SIGHASH_NONE},
 492     {"SINGLE", SIGHASH_SINGLE},
 493     {"ALL|ANYONECANPAY", SIGHASH_ALL|SIGHASH_ANYONECANPAY},
 494     {"NONE|ANYONECANPAY", SIGHASH_NONE|SIGHASH_ANYONECANPAY},
 495     {"SINGLE|ANYONECANPAY", SIGHASH_SINGLE|SIGHASH_ANYONECANPAY},
 496 };
 497
 498 static bool findSighashFlags(int& flags, const std::string& flagStr)
 499 {
 500     flags = 0;
 501
 502     for (unsigned int i = 0; i < N_SIGHASH_OPTS; i++) {
 503         if (flagStr == sighashOptions[i].flagStr) {
 504             flags = sighashOptions[i].flags;
 505             return true;
 506         }
 507     }
 508
 509     return false;
 510 }
 511
 512 static CAmount AmountFromValue(const UniValue& value)
 513 {
 514     if (!value.isNum() && !value.isStr())
 515         throw std::runtime_error("Amount is not a number or string");
 516     CAmount amount;
 517     if (!ParseFixedPoint(value.getValStr(), 8, &amount))
 518         throw std::runtime_error("Invalid amount");
 519     if (!MoneyRange(amount))
 520         throw std::runtime_error("Amount out of range");
 521     return amount;
 522 }
 523
 524 static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
 525 {
 526     int nHashType = SIGHASH_ALL;
 527
 528     if (flagStr.size() > 0)
 529         if (!findSighashFlags(nHashType, flagStr))
 530             throw std::runtime_error("unknown sighash flag/sign option");
 531
 532     std::vector<CTransaction> txVariants;
 533     txVariants.push_back(tx);
 534
 535     // mergedTx will end up with all the signatures; it
 536     // starts as a clone of the raw tx:
 537     CMutableTransaction mergedTx(txVariants[0]);
 538     bool fComplete = true;
 539     CCoinsView viewDummy;
 540     CCoinsViewCache view(&viewDummy);
 541
 542     if (!registers.count("privatekeys"))
 543         throw std::runtime_error("privatekeys register variable must be set.");
 544     CBasicKeyStore tempKeystore;
 545     UniValue keysObj = registers["privatekeys"];
 546
 547     for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
 548         if (!keysObj[kidx].isStr())
 549             throw std::runtime_error("privatekey not a std::string");
 550         CBitcoinSecret vchSecret;
 551         bool fGood = vchSecret.SetString(keysObj[kidx].getValStr());
 552         if (!fGood)
 553             throw std::runtime_error("privatekey not valid");
 554
 555         CKey key = vchSecret.GetKey();
 556         tempKeystore.AddKey(key);
 557     }
 558
 559     // Add previous txouts given in the RPC call:
 560     if (!registers.count("prevtxs"))
 561         throw std::runtime_error("prevtxs register variable must be set.");
 562     UniValue prevtxsObj = registers["prevtxs"];
 563     {
 564         for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) {
 565             UniValue prevOut = prevtxsObj[previdx];
 566             if (!prevOut.isObject())
 567                 throw std::runtime_error("expected prevtxs internal object");
 568
 569             std::map<std::string, UniValue::VType> types = {
 570                 {"txid", UniValue::VSTR},
 571                 {"vout", UniValue::VNUM},
 572                 {"scriptPubKey", UniValue::VSTR},
 573             };
 574             if (!prevOut.checkObject(types))
 575                 throw std::runtime_error("prevtxs internal object typecheck fail");
 576
 577             uint256 txid = ParseHashUV(prevOut["txid"], "txid");
 578
 579             int nOut = atoi(prevOut["vout"].getValStr());
 580             if (nOut < 0)
 581                 throw std::runtime_error("vout must be positive");
 582
 583             COutPoint out(txid, nOut);
 584             std::vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
 585             CScript scriptPubKey(pkData.begin(), pkData.end());
 586
 587             {
 588                 const Coin& coin = view.AccessCoin(out);
 589                 if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
 590                     std::string err("Previous output scriptPubKey mismatch:\n");
 591                     err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
 592                         ScriptToAsmStr(scriptPubKey);
 593                     throw std::runtime_error(err);
 594                 }
 595                 Coin newcoin;
 596                 newcoin.out.scriptPubKey = scriptPubKey;
 597                 newcoin.out.nValue = 0;
 598                 if (prevOut.exists("amount")) {
 599                     newcoin.out.nValue = AmountFromValue(prevOut["amount"]);
 600                 }
 601                 newcoin.nHeight = 1;
 602                 view.AddCoin(out, std::move(newcoin), true);
 603             }
 604
 605             // if redeemScript given and private keys given,
 606             // add redeemScript to the tempKeystore so it can be signed:
 607             if ((scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) &&
 608                 prevOut.exists("redeemScript")) {
 609                 UniValue v = prevOut["redeemScript"];
 610                 std::vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
 611                 CScript redeemScript(rsData.begin(), rsData.end());
 612                 tempKeystore.AddCScript(redeemScript);
 613             }
 614         }
 615     }
 616
 617     const CKeyStore& keystore = tempKeystore;
 618
 619     bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);
 620
 621     // Sign what we can:
 622     for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
 623         CTxIn& txin = mergedTx.vin[i];
 624         const Coin& coin = view.AccessCoin(txin.prevout);
 625         if (coin.IsSpent()) {
 626             fComplete = false;
 627             continue;
 628         }
 629         const CScript& prevPubKey = coin.out.scriptPubKey;
 630         const CAmount& amount = coin.out.nValue;
 631
 632         SignatureData sigdata;
 633         // Only sign SIGHASH_SINGLE if there's a corresponding output:
 634         if (!fHashSingle || (i < mergedTx.vout.size()))
 635             ProduceSignature(MutableTransactionSignatureCreator(&keystore, &mergedTx, i, amount, nHashType), prevPubKey, sigdata);
 636
 637         // ... and merge in other signatures:
 638         for (const CTransaction& txv : txVariants)
 639             sigdata = CombineSignatures(prevPubKey, MutableTransactionSignatureChecker(&mergedTx, i, amount), sigdata, DataFromTransaction(txv, i));
 640         UpdateTransaction(mergedTx, i, sigdata);
 641
 642         if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i, amount)))
 643             fComplete = false;
 644     }
 645
 646     if (fComplete) {
 647         // do nothing... for now
 648         // perhaps store this for later optional JSON output
 649     }
 650
 651     tx = mergedTx;
 652 }
 653
 654 class Secp256k1Init
 655 {
 656     ECCVerifyHandle globalVerifyHandle;
 657
 658 public:
 659     Secp256k1Init() {
 660         ECC_Start();
 661     }
 662     ~Secp256k1Init() {
 663         ECC_Stop();
 664     }
 665 };
 666
 667 static void MutateTx(CMutableTransaction& tx, const std::string& command,
 668                      const std::string& commandVal)
 669 {
 670     std::unique_ptr<Secp256k1Init> ecc;
 671
 672     if (command == "nversion")
 673         MutateTxVersion(tx, commandVal);
 674     else if (command == "locktime")
 675         MutateTxLocktime(tx, commandVal);
 676     else if (command == "replaceable") {
 677         MutateTxRBFOptIn(tx, commandVal);
 678     }
 679
 680     else if (command == "delin")
 681         MutateTxDelInput(tx, commandVal);
 682     else if (command == "in")
 683         MutateTxAddInput(tx, commandVal);
 684
 685     else if (command == "delout")
 686         MutateTxDelOutput(tx, commandVal);
 687     else if (command == "outaddr")
 688         MutateTxAddOutAddr(tx, commandVal);
 689     else if (command == "outpubkey") {
 690         if (!ecc) { ecc.reset(new Secp256k1Init()); }
 691         MutateTxAddOutPubKey(tx, commandVal);
 692     } else if (command == "outmultisig") {
 693         if (!ecc) { ecc.reset(new Secp256k1Init()); }
 694         MutateTxAddOutMultiSig(tx, commandVal);
 695     } else if (command == "outscript")
 696         MutateTxAddOutScript(tx, commandVal);
 697     else if (command == "outdata")
 698         MutateTxAddOutData(tx, commandVal);
 699
 700     else if (command == "sign") {
 701         if (!ecc) { ecc.reset(new Secp256k1Init()); }
 702         MutateTxSign(tx, commandVal);
 703     }
 704
 705     else if (command == "load")
 706         RegisterLoad(commandVal);
 707
 708     else if (command == "set")
 709         RegisterSet(commandVal);
 710
 711     else
 712         throw std::runtime_error("unknown command");
 713 }
 714
 715 static void OutputTxJSON(const CTransaction& tx)
 716 {
 717     UniValue entry(UniValue::VOBJ);
 718     TxToUniv(tx, uint256(), entry);
 719
 720     std::string jsonOutput = entry.write(4);
 721     fprintf(stdout, "%s\n", jsonOutput.c_str());
 722 }
 723
 724 static void OutputTxHash(const CTransaction& tx)
 725 {
 726     std::string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id)
 727
 728     fprintf(stdout, "%s\n", strHexHash.c_str());
 729 }
 730
 731 static void OutputTxHex(const CTransaction& tx)
 732 {
 733     std::string strHex = EncodeHexTx(tx);
 734
 735     fprintf(stdout, "%s\n", strHex.c_str());
 736 }
 737
 738 static void OutputTx(const CTransaction& tx)
 739 {
 740     if (gArgs.GetBoolArg("-json", false))
 741         OutputTxJSON(tx);
 742     else if (gArgs.GetBoolArg("-txid", false))
 743         OutputTxHash(tx);
 744     else
 745         OutputTxHex(tx);
 746 }
 747
 748 static std::string readStdin()
 749 {
 750     char buf[4096];
 751     std::string ret;
 752
 753     while (!feof(stdin)) {
 754         size_t bread = fread(buf, 1, sizeof(buf), stdin);
 755         ret.append(buf, bread);
 756         if (bread < sizeof(buf))
 757             break;
 758     }
 759
 760     if (ferror(stdin))
 761         throw std::runtime_error("error reading stdin");
 762
 763     boost::algorithm::trim_right(ret);
 764
 765     return ret;
 766 }
 767
 768 static int CommandLineRawTx(int argc, char* argv[])
 769 {
 770     std::string strPrint;
 771     int nRet = 0;
 772     try {
 773         // Skip switches; Permit common stdin convention "-"
 774         while (argc > 1 && IsSwitchChar(argv[1][0]) &&
 775                (argv[1][1] != 0)) {
 776             argc--;
 777             argv++;
 778         }
 779
 780         CMutableTransaction tx;
 781         int startArg;
 782
 783         if (!fCreateBlank) {
 784             // require at least one param
 785             if (argc < 2)
 786                 throw std::runtime_error("too few parameters");
 787
 788             // param: hex-encoded bitcoin transaction
 789             std::string strHexTx(argv[1]);
 790             if (strHexTx == "-")                 // "-" implies standard input
 791                 strHexTx = readStdin();
 792
 793             if (!DecodeHexTx(tx, strHexTx, true))
 794                 throw std::runtime_error("invalid transaction encoding");
 795
 796             startArg = 2;
 797         } else
 798             startArg = 1;
 799
 800         for (int i = startArg; i < argc; i++) {
 801             std::string arg = argv[i];
 802             std::string key, value;
 803             size_t eqpos = arg.find('=');
 804             if (eqpos == std::string::npos)
 805                 key = arg;
 806             else {
 807                 key = arg.substr(0, eqpos);
 808                 value = arg.substr(eqpos + 1);
 809             }
 810
 811             MutateTx(tx, key, value);
 812         }
 813
 814         OutputTx(tx);
 815     }
 816
 817     catch (const boost::thread_interrupted&) {
 818         throw;
 819     }
 820     catch (const std::exception& e) {
 821         strPrint = std::string("error: ") + e.what();
 822         nRet = EXIT_FAILURE;
 823     }
 824     catch (...) {
 825         PrintExceptionContinue(nullptr, "CommandLineRawTx()");
 826         throw;
 827     }
 828
 829     if (strPrint != "") {
 830         fprintf((nRet == 0 ? stdout : stderr), "%s\n", strPrint.c_str());
 831     }
 832     return nRet;
 833 }
 834
 835 int main(int argc, char* argv[])
 836 {
 837     SetupEnvironment();
 838
 839     try {
 840         int ret = AppInitRawTx(argc, argv);
 841         if (ret != CONTINUE_EXECUTION)
 842             return ret;
 843     }
 844     catch (const std::exception& e) {
 845         PrintExceptionContinue(&e, "AppInitRawTx()");
 846         return EXIT_FAILURE;
 847     } catch (...) {
 848         PrintExceptionContinue(nullptr, "AppInitRawTx()");
 849         return EXIT_FAILURE;
 850     }
 851
 852     int ret = EXIT_FAILURE;
 853     try {
 854         ret = CommandLineRawTx(argc, argv);
 855     }
 856     catch (const std::exception& e) {
 857         PrintExceptionContinue(&e, "CommandLineRawTx()");
 858     } catch (...) {
 859         PrintExceptionContinue(nullptr, "CommandLineRawTx()");
 860     }
 861     return ret;
 862 }