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