script.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Distributed under the MIT/X11 software license, see the accompanying
   3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   4
   5 class CTransaction;
   6
   7 enum
   8 {
   9     SIGHASH_ALL = 1,
  10     SIGHASH_NONE = 2,
  11     SIGHASH_SINGLE = 3,
  12     SIGHASH_ANYONECANPAY = 0x80,
  13 };
  14
  15
  16
  17 enum opcodetype
  18 {
  19     // push value
  20     OP_0=0,
  21     OP_FALSE=OP_0,
  22     OP_PUSHDATA1=76,
  23     OP_PUSHDATA2,
  24     OP_PUSHDATA4,
  25     OP_1NEGATE,
  26     OP_RESERVED,
  27     OP_1,
  28     OP_TRUE=OP_1,
  29     OP_2,
  30     OP_3,
  31     OP_4,
  32     OP_5,
  33     OP_6,
  34     OP_7,
  35     OP_8,
  36     OP_9,
  37     OP_10,
  38     OP_11,
  39     OP_12,
  40     OP_13,
  41     OP_14,
  42     OP_15,
  43     OP_16,
  44
  45     // control
  46     OP_NOP,
  47     OP_VER,
  48     OP_IF,
  49     OP_NOTIF,
  50     OP_VERIF,
  51     OP_VERNOTIF,
  52     OP_ELSE,
  53     OP_ENDIF,
  54     OP_VERIFY,
  55     OP_RETURN,
  56
  57     // stack ops
  58     OP_TOALTSTACK,
  59     OP_FROMALTSTACK,
  60     OP_2DROP,
  61     OP_2DUP,
  62     OP_3DUP,
  63     OP_2OVER,
  64     OP_2ROT,
  65     OP_2SWAP,
  66     OP_IFDUP,
  67     OP_DEPTH,
  68     OP_DROP,
  69     OP_DUP,
  70     OP_NIP,
  71     OP_OVER,
  72     OP_PICK,
  73     OP_ROLL,
  74     OP_ROT,
  75     OP_SWAP,
  76     OP_TUCK,
  77
  78     // splice ops
  79     OP_CAT,
  80     OP_SUBSTR,
  81     OP_LEFT,
  82     OP_RIGHT,
  83     OP_SIZE,
  84
  85     // bit logic
  86     OP_INVERT,
  87     OP_AND,
  88     OP_OR,
  89     OP_XOR,
  90     OP_EQUAL,
  91     OP_EQUALVERIFY,
  92     OP_RESERVED1,
  93     OP_RESERVED2,
  94
  95     // numeric
  96     OP_1ADD,
  97     OP_1SUB,
  98     OP_2MUL,
  99     OP_2DIV,
 100     OP_NEGATE,
 101     OP_ABS,
 102     OP_NOT,
 103     OP_0NOTEQUAL,
 104
 105     OP_ADD,
 106     OP_SUB,
 107     OP_MUL,
 108     OP_DIV,
 109     OP_MOD,
 110     OP_LSHIFT,
 111     OP_RSHIFT,
 112
 113     OP_BOOLAND,
 114     OP_BOOLOR,
 115     OP_NUMEQUAL,
 116     OP_NUMEQUALVERIFY,
 117     OP_NUMNOTEQUAL,
 118     OP_LESSTHAN,
 119     OP_GREATERTHAN,
 120     OP_LESSTHANOREQUAL,
 121     OP_GREATERTHANOREQUAL,
 122     OP_MIN,
 123     OP_MAX,
 124
 125     OP_WITHIN,
 126
 127     // crypto
 128     OP_RIPEMD160,
 129     OP_SHA1,
 130     OP_SHA256,
 131     OP_HASH160,
 132     OP_HASH256,
 133     OP_CODESEPARATOR,
 134     OP_CHECKSIG,
 135     OP_CHECKSIGVERIFY,
 136     OP_CHECKMULTISIG,
 137     OP_CHECKMULTISIGVERIFY,
 138
 139     // expansion
 140     OP_NOP1,
 141     OP_NOP2,
 142     OP_NOP3,
 143     OP_NOP4,
 144     OP_NOP5,
 145     OP_NOP6,
 146     OP_NOP7,
 147     OP_NOP8,
 148     OP_NOP9,
 149     OP_NOP10,
 150
 151
 152
 153     // template matching params
 154     OP_PUBKEYHASH = 0xfd,
 155     OP_PUBKEY = 0xfe,
 156
 157     OP_INVALIDOPCODE = 0xff,
 158 };
 159
 160
 161
 162
 163
 164
 165
 166
 167 inline const char* GetOpName(opcodetype opcode)
 168 {
 169     switch (opcode)
 170     {
 171     // push value
 172     case OP_0                      : return "0";
 173     case OP_PUSHDATA1              : return "OP_PUSHDATA1";
 174     case OP_PUSHDATA2              : return "OP_PUSHDATA2";
 175     case OP_PUSHDATA4              : return "OP_PUSHDATA4";
 176     case OP_1NEGATE                : return "-1";
 177     case OP_RESERVED               : return "OP_RESERVED";
 178     case OP_1                      : return "1";
 179     case OP_2                      : return "2";
 180     case OP_3                      : return "3";
 181     case OP_4                      : return "4";
 182     case OP_5                      : return "5";
 183     case OP_6                      : return "6";
 184     case OP_7                      : return "7";
 185     case OP_8                      : return "8";
 186     case OP_9                      : return "9";
 187     case OP_10                     : return "10";
 188     case OP_11                     : return "11";
 189     case OP_12                     : return "12";
 190     case OP_13                     : return "13";
 191     case OP_14                     : return "14";
 192     case OP_15                     : return "15";
 193     case OP_16                     : return "16";
 194
 195     // control
 196     case OP_NOP                    : return "OP_NOP";
 197     case OP_VER                    : return "OP_VER";
 198     case OP_IF                     : return "OP_IF";
 199     case OP_NOTIF                  : return "OP_NOTIF";
 200     case OP_VERIF                  : return "OP_VERIF";
 201     case OP_VERNOTIF               : return "OP_VERNOTIF";
 202     case OP_ELSE                   : return "OP_ELSE";
 203     case OP_ENDIF                  : return "OP_ENDIF";
 204     case OP_VERIFY                 : return "OP_VERIFY";
 205     case OP_RETURN                 : return "OP_RETURN";
 206
 207     // stack ops
 208     case OP_TOALTSTACK             : return "OP_TOALTSTACK";
 209     case OP_FROMALTSTACK           : return "OP_FROMALTSTACK";
 210     case OP_2DROP                  : return "OP_2DROP";
 211     case OP_2DUP                   : return "OP_2DUP";
 212     case OP_3DUP                   : return "OP_3DUP";
 213     case OP_2OVER                  : return "OP_2OVER";
 214     case OP_2ROT                   : return "OP_2ROT";
 215     case OP_2SWAP                  : return "OP_2SWAP";
 216     case OP_IFDUP                  : return "OP_IFDUP";
 217     case OP_DEPTH                  : return "OP_DEPTH";
 218     case OP_DROP                   : return "OP_DROP";
 219     case OP_DUP                    : return "OP_DUP";
 220     case OP_NIP                    : return "OP_NIP";
 221     case OP_OVER                   : return "OP_OVER";
 222     case OP_PICK                   : return "OP_PICK";
 223     case OP_ROLL                   : return "OP_ROLL";
 224     case OP_ROT                    : return "OP_ROT";
 225     case OP_SWAP                   : return "OP_SWAP";
 226     case OP_TUCK                   : return "OP_TUCK";
 227
 228     // splice ops
 229     case OP_CAT                    : return "OP_CAT";
 230     case OP_SUBSTR                 : return "OP_SUBSTR";
 231     case OP_LEFT                   : return "OP_LEFT";
 232     case OP_RIGHT                  : return "OP_RIGHT";
 233     case OP_SIZE                   : return "OP_SIZE";
 234
 235     // bit logic
 236     case OP_INVERT                 : return "OP_INVERT";
 237     case OP_AND                    : return "OP_AND";
 238     case OP_OR                     : return "OP_OR";
 239     case OP_XOR                    : return "OP_XOR";
 240     case OP_EQUAL                  : return "OP_EQUAL";
 241     case OP_EQUALVERIFY            : return "OP_EQUALVERIFY";
 242     case OP_RESERVED1              : return "OP_RESERVED1";
 243     case OP_RESERVED2              : return "OP_RESERVED2";
 244
 245     // numeric
 246     case OP_1ADD                   : return "OP_1ADD";
 247     case OP_1SUB                   : return "OP_1SUB";
 248     case OP_2MUL                   : return "OP_2MUL";
 249     case OP_2DIV                   : return "OP_2DIV";
 250     case OP_NEGATE                 : return "OP_NEGATE";
 251     case OP_ABS                    : return "OP_ABS";
 252     case OP_NOT                    : return "OP_NOT";
 253     case OP_0NOTEQUAL              : return "OP_0NOTEQUAL";
 254     case OP_ADD                    : return "OP_ADD";
 255     case OP_SUB                    : return "OP_SUB";
 256     case OP_MUL                    : return "OP_MUL";
 257     case OP_DIV                    : return "OP_DIV";
 258     case OP_MOD                    : return "OP_MOD";
 259     case OP_LSHIFT                 : return "OP_LSHIFT";
 260     case OP_RSHIFT                 : return "OP_RSHIFT";
 261     case OP_BOOLAND                : return "OP_BOOLAND";
 262     case OP_BOOLOR                 : return "OP_BOOLOR";
 263     case OP_NUMEQUAL               : return "OP_NUMEQUAL";
 264     case OP_NUMEQUALVERIFY         : return "OP_NUMEQUALVERIFY";
 265     case OP_NUMNOTEQUAL            : return "OP_NUMNOTEQUAL";
 266     case OP_LESSTHAN               : return "OP_LESSTHAN";
 267     case OP_GREATERTHAN            : return "OP_GREATERTHAN";
 268     case OP_LESSTHANOREQUAL        : return "OP_LESSTHANOREQUAL";
 269     case OP_GREATERTHANOREQUAL     : return "OP_GREATERTHANOREQUAL";
 270     case OP_MIN                    : return "OP_MIN";
 271     case OP_MAX                    : return "OP_MAX";
 272     case OP_WITHIN                 : return "OP_WITHIN";
 273
 274     // crypto
 275     case OP_RIPEMD160              : return "OP_RIPEMD160";
 276     case OP_SHA1                   : return "OP_SHA1";
 277     case OP_SHA256                 : return "OP_SHA256";
 278     case OP_HASH160                : return "OP_HASH160";
 279     case OP_HASH256                : return "OP_HASH256";
 280     case OP_CODESEPARATOR          : return "OP_CODESEPARATOR";
 281     case OP_CHECKSIG               : return "OP_CHECKSIG";
 282     case OP_CHECKSIGVERIFY         : return "OP_CHECKSIGVERIFY";
 283     case OP_CHECKMULTISIG          : return "OP_CHECKMULTISIG";
 284     case OP_CHECKMULTISIGVERIFY    : return "OP_CHECKMULTISIGVERIFY";
 285
 286     // expanson
 287     case OP_NOP1                   : return "OP_NOP1";
 288     case OP_NOP2                   : return "OP_NOP2";
 289     case OP_NOP3                   : return "OP_NOP3";
 290     case OP_NOP4                   : return "OP_NOP4";
 291     case OP_NOP5                   : return "OP_NOP5";
 292     case OP_NOP6                   : return "OP_NOP6";
 293     case OP_NOP7                   : return "OP_NOP7";
 294     case OP_NOP8                   : return "OP_NOP8";
 295     case OP_NOP9                   : return "OP_NOP9";
 296     case OP_NOP10                  : return "OP_NOP10";
 297
 298
 299
 300     // template matching params
 301     case OP_PUBKEYHASH             : return "OP_PUBKEYHASH";
 302     case OP_PUBKEY                 : return "OP_PUBKEY";
 303
 304     case OP_INVALIDOPCODE          : return "OP_INVALIDOPCODE";
 305     default:
 306         return "OP_UNKNOWN";
 307     }
 308 };
 309
 310
 311
 312
 313 inline string ValueString(const vector<unsigned char>& vch)
 314 {
 315     if (vch.size() <= 4)
 316         return strprintf("%d", CBigNum(vch).getint());
 317     else
 318         return HexStr(vch);
 319 }
 320
 321 inline string StackString(const vector<vector<unsigned char> >& vStack)
 322 {
 323     string str;
 324     foreach(const vector<unsigned char>& vch, vStack)
 325     {
 326         if (!str.empty())
 327             str += " ";
 328         str += ValueString(vch);
 329     }
 330     return str;
 331 }
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341 class CScript : public vector<unsigned char>
 342 {
 343 protected:
 344     CScript& push_int64(int64 n)
 345     {
 346         if (n == -1 || (n >= 1 && n <= 16))
 347         {
 348             push_back(n + (OP_1 - 1));
 349         }
 350         else
 351         {
 352             CBigNum bn(n);
 353             *this << bn.getvch();
 354         }
 355         return *this;
 356     }
 357
 358     CScript& push_uint64(uint64 n)
 359     {
 360         if (n >= 1 && n <= 16)
 361         {
 362             push_back(n + (OP_1 - 1));
 363         }
 364         else
 365         {
 366             CBigNum bn(n);
 367             *this << bn.getvch();
 368         }
 369         return *this;
 370     }
 371
 372 public:
 373     CScript() { }
 374     CScript(const CScript& b) : vector<unsigned char>(b.begin(), b.end()) { }
 375     CScript(const_iterator pbegin, const_iterator pend) : vector<unsigned char>(pbegin, pend) { }
 376 #ifndef _MSC_VER
 377     CScript(const unsigned char* pbegin, const unsigned char* pend) : vector<unsigned char>(pbegin, pend) { }
 378 #endif
 379
 380     CScript& operator+=(const CScript& b)
 381     {
 382         insert(end(), b.begin(), b.end());
 383         return *this;
 384     }
 385
 386     friend CScript operator+(const CScript& a, const CScript& b)
 387     {
 388         CScript ret = a;
 389         ret += b;
 390         return ret;
 391     }
 392
 393
 394     explicit CScript(char b)           { operator<<(b); }
 395     explicit CScript(short b)          { operator<<(b); }
 396     explicit CScript(int b)            { operator<<(b); }
 397     explicit CScript(long b)           { operator<<(b); }
 398     explicit CScript(int64 b)          { operator<<(b); }
 399     explicit CScript(unsigned char b)  { operator<<(b); }
 400     explicit CScript(unsigned int b)   { operator<<(b); }
 401     explicit CScript(unsigned short b) { operator<<(b); }
 402     explicit CScript(unsigned long b)  { operator<<(b); }
 403     explicit CScript(uint64 b)         { operator<<(b); }
 404
 405     explicit CScript(opcodetype b)     { operator<<(b); }
 406     explicit CScript(const uint256& b) { operator<<(b); }
 407     explicit CScript(const CBigNum& b) { operator<<(b); }
 408     explicit CScript(const vector<unsigned char>& b) { operator<<(b); }
 409
 410
 411     CScript& operator<<(char b)           { return push_int64(b); }
 412     CScript& operator<<(short b)          { return push_int64(b); }
 413     CScript& operator<<(int b)            { return push_int64(b); }
 414     CScript& operator<<(long b)           { return push_int64(b); }
 415     CScript& operator<<(int64 b)          { return push_int64(b); }
 416     CScript& operator<<(unsigned char b)  { return push_uint64(b); }
 417     CScript& operator<<(unsigned int b)   { return push_uint64(b); }
 418     CScript& operator<<(unsigned short b) { return push_uint64(b); }
 419     CScript& operator<<(unsigned long b)  { return push_uint64(b); }
 420     CScript& operator<<(uint64 b)         { return push_uint64(b); }
 421
 422     CScript& operator<<(opcodetype opcode)
 423     {
 424         if (opcode < 0 || opcode > 0xff)
 425             throw runtime_error("CScript::operator<<() : invalid opcode");
 426         insert(end(), (unsigned char)opcode);
 427         return *this;
 428     }
 429
 430     CScript& operator<<(const uint160& b)
 431     {
 432         insert(end(), sizeof(b));
 433         insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
 434         return *this;
 435     }
 436
 437     CScript& operator<<(const uint256& b)
 438     {
 439         insert(end(), sizeof(b));
 440         insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
 441         return *this;
 442     }
 443
 444     CScript& operator<<(const CBigNum& b)
 445     {
 446         *this << b.getvch();
 447         return *this;
 448     }
 449
 450     CScript& operator<<(const vector<unsigned char>& b)
 451     {
 452         if (b.size() < OP_PUSHDATA1)
 453         {
 454             insert(end(), (unsigned char)b.size());
 455         }
 456         else if (b.size() <= 0xff)
 457         {
 458             insert(end(), OP_PUSHDATA1);
 459             insert(end(), (unsigned char)b.size());
 460         }
 461         else if (b.size() <= 0xffff)
 462         {
 463             insert(end(), OP_PUSHDATA2);
 464             unsigned short nSize = b.size();
 465             insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
 466         }
 467         else
 468         {
 469             insert(end(), OP_PUSHDATA4);
 470             unsigned int nSize = b.size();
 471             insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
 472         }
 473         insert(end(), b.begin(), b.end());
 474         return *this;
 475     }
 476
 477     CScript& operator<<(const CScript& b)
 478     {
 479         // I'm not sure if this should push the script or concatenate scripts.
 480         // If there's ever a use for pushing a script onto a script, delete this member fn
 481         assert(("warning: pushing a CScript onto a CScript with << is probably not intended, use + to concatenate", false));
 482         return *this;
 483     }
 484
 485
 486     bool GetOp(iterator& pc, opcodetype& opcodeRet, vector<unsigned char>& vchRet)
 487     {
 488          // Wrapper so it can be called with either iterator or const_iterator
 489          const_iterator pc2 = pc;
 490          bool fRet = GetOp2(pc2, opcodeRet, &vchRet);
 491          pc = begin() + (pc2 - begin());
 492          return fRet;
 493     }
 494
 495     bool GetOp(iterator& pc, opcodetype& opcodeRet)
 496     {
 497          const_iterator pc2 = pc;
 498          bool fRet = GetOp2(pc2, opcodeRet, NULL);
 499          pc = begin() + (pc2 - begin());
 500          return fRet;
 501     }
 502
 503     bool GetOp(const_iterator& pc, opcodetype& opcodeRet, vector<unsigned char>& vchRet) const
 504     {
 505         return GetOp2(pc, opcodeRet, &vchRet);
 506     }
 507
 508     bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const
 509     {
 510         return GetOp2(pc, opcodeRet, NULL);
 511     }
 512
 513     bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, vector<unsigned char>* pvchRet) const
 514     {
 515         opcodeRet = OP_INVALIDOPCODE;
 516         if (pvchRet)
 517             pvchRet->clear();
 518         if (pc >= end())
 519             return false;
 520
 521         // Read instruction
 522         if (end() - pc < 1)
 523             return false;
 524         unsigned int opcode = *pc++;
 525
 526         // Immediate operand
 527         if (opcode <= OP_PUSHDATA4)
 528         {
 529             unsigned int nSize;
 530             if (opcode < OP_PUSHDATA1)
 531             {
 532                 nSize = opcode;
 533             }
 534             else if (opcode == OP_PUSHDATA1)
 535             {
 536                 if (end() - pc < 1)
 537                     return false;
 538                 nSize = *pc++;
 539             }
 540             else if (opcode == OP_PUSHDATA2)
 541             {
 542                 if (end() - pc < 2)
 543                     return false;
 544                 nSize = 0;
 545                 memcpy(&nSize, &pc[0], 2);
 546                 pc += 2;
 547             }
 548             else if (opcode == OP_PUSHDATA4)
 549             {
 550                 if (end() - pc < 4)
 551                     return false;
 552                 memcpy(&nSize, &pc[0], 4);
 553                 pc += 4;
 554             }
 555             if (end() - pc < nSize)
 556                 return false;
 557             if (pvchRet)
 558                 pvchRet->assign(pc, pc + nSize);
 559             pc += nSize;
 560         }
 561
 562         opcodeRet = (opcodetype)opcode;
 563         return true;
 564     }
 565
 566
 567     void FindAndDelete(const CScript& b)
 568     {
 569         if (b.empty())
 570             return;
 571         iterator pc = begin();
 572         opcodetype opcode;
 573         do
 574         {
 575             while (end() - pc >= b.size() && memcmp(&pc[0], &b[0], b.size()) == 0)
 576                 erase(pc, pc + b.size());
 577         }
 578         while (GetOp(pc, opcode));
 579     }
 580
 581
 582     int GetSigOpCount() const
 583     {
 584         int n = 0;
 585         const_iterator pc = begin();
 586         while (pc < end())
 587         {
 588             opcodetype opcode;
 589             if (!GetOp(pc, opcode))
 590                 break;
 591             if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
 592                 n++;
 593             else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
 594                 n += 20;
 595         }
 596         return n;
 597     }
 598
 599
 600     bool IsPushOnly() const
 601     {
 602         if (size() > 200)
 603             return false;
 604         const_iterator pc = begin();
 605         while (pc < end())
 606         {
 607             opcodetype opcode;
 608             if (!GetOp(pc, opcode))
 609                 return false;
 610             if (opcode > OP_16)
 611                 return false;
 612         }
 613         return true;
 614     }
 615
 616
 617     uint160 GetBitcoinAddressHash160() const
 618     {
 619         opcodetype opcode;
 620         vector<unsigned char> vch;
 621         CScript::const_iterator pc = begin();
 622         if (!GetOp(pc, opcode, vch) || opcode != OP_DUP) return 0;
 623         if (!GetOp(pc, opcode, vch) || opcode != OP_HASH160) return 0;
 624         if (!GetOp(pc, opcode, vch) || vch.size() != sizeof(uint160)) return 0;
 625         uint160 hash160 = uint160(vch);
 626         if (!GetOp(pc, opcode, vch) || opcode != OP_EQUALVERIFY) return 0;
 627         if (!GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG) return 0;
 628         if (pc != end()) return 0;
 629         return hash160;
 630     }
 631
 632     string GetBitcoinAddress() const
 633     {
 634         uint160 hash160 = GetBitcoinAddressHash160();
 635         if (hash160 == 0)
 636             return "";
 637         return Hash160ToAddress(hash160);
 638     }
 639
 640     void SetBitcoinAddress(const uint160& hash160)
 641     {
 642         this->clear();
 643         *this << OP_DUP << OP_HASH160 << hash160 << OP_EQUALVERIFY << OP_CHECKSIG;
 644     }
 645
 646     void SetBitcoinAddress(const vector<unsigned char>& vchPubKey)
 647     {
 648         SetBitcoinAddress(Hash160(vchPubKey));
 649     }
 650
 651     bool SetBitcoinAddress(const string& strAddress)
 652     {
 653         this->clear();
 654         uint160 hash160;
 655         if (!AddressToHash160(strAddress, hash160))
 656             return false;
 657         SetBitcoinAddress(hash160);
 658         return true;
 659     }
 660
 661
 662     void PrintHex() const
 663     {
 664         printf("CScript(%s)\n", HexStr(begin(), end(), true).c_str());
 665     }
 666
 667     string ToString() const
 668     {
 669         string str;
 670         opcodetype opcode;
 671         vector<unsigned char> vch;
 672         const_iterator pc = begin();
 673         while (pc < end())
 674         {
 675             if (!str.empty())
 676                 str += " ";
 677             if (!GetOp(pc, opcode, vch))
 678             {
 679                 str += "[error]";
 680                 return str;
 681             }
 682             if (0 <= opcode && opcode <= OP_PUSHDATA4)
 683                 str += ValueString(vch);
 684             else
 685                 str += GetOpName(opcode);
 686         }
 687         return str;
 688     }
 689
 690     void print() const
 691     {
 692         printf("%s\n", ToString().c_str());
 693     }
 694 };
 695
 696
 697
 698
 699
 700
 701
 702
 703 uint256 SignatureHash(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
 704 bool IsStandard(const CScript& scriptPubKey);
 705 bool IsMine(const CScript& scriptPubKey);
 706 bool ExtractPubKey(const CScript& scriptPubKey, bool fMineOnly, vector<unsigned char>& vchPubKeyRet);
 707 bool ExtractHash160(const CScript& scriptPubKey, uint160& hash160Ret);
 708 bool SignSignature(const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL, CScript scriptPrereq=CScript());
 709 bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int nHashType=0);