source/src/script.h

0001 // Copyright (c) 2009-2010 Satoshi Nakamoto
0002 // Copyright (c) 2011 The Bitcoin developers
0003 // Distributed under the MIT/X11 software license, see the accompanying
0004 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
0005 #ifndef H_BITCOIN_SCRIPT
0006 #define H_BITCOIN_SCRIPT
0007
0008 #include "base58.h"
0009 #include "keystore.h"
0010
0011 #include <string>
0012 #include <vector>
0013
0014 #include <boost/foreach.hpp>
0015
0016 class CTransaction;
0017
0018 enum
0019 {
0020     SIGHASH_ALL = 1,
0021     SIGHASH_NONE = 2,
0022     SIGHASH_SINGLE = 3,
0023     SIGHASH_ANYONECANPAY = 0x80,
0024 };
0025
0026
0027
0028 enum opcodetype
0029 {
0030     // push value
0031     OP_0=0,
0032     OP_FALSE=OP_0,
0033     OP_PUSHDATA1=76,
0034     OP_PUSHDATA2,
0035     OP_PUSHDATA4,
0036     OP_1NEGATE,
0037     OP_RESERVED,
0038     OP_1,
0039     OP_TRUE=OP_1,
0040     OP_2,
0041     OP_3,
0042     OP_4,
0043     OP_5,
0044     OP_6,
0045     OP_7,
0046     OP_8,
0047     OP_9,
0048     OP_10,
0049     OP_11,
0050     OP_12,
0051     OP_13,
0052     OP_14,
0053     OP_15,
0054     OP_16,
0055
0056     // control
0057     OP_NOP,
0058     OP_VER,
0059     OP_IF,
0060     OP_NOTIF,
0061     OP_VERIF,
0062     OP_VERNOTIF,
0063     OP_ELSE,
0064     OP_ENDIF,
0065     OP_VERIFY,
0066     OP_RETURN,
0067
0068     // stack ops
0069     OP_TOALTSTACK,
0070     OP_FROMALTSTACK,
0071     OP_2DROP,
0072     OP_2DUP,
0073     OP_3DUP,
0074     OP_2OVER,
0075     OP_2ROT,
0076     OP_2SWAP,
0077     OP_IFDUP,
0078     OP_DEPTH,
0079     OP_DROP,
0080     OP_DUP,
0081     OP_NIP,
0082     OP_OVER,
0083     OP_PICK,
0084     OP_ROLL,
0085     OP_ROT,
0086     OP_SWAP,
0087     OP_TUCK,
0088
0089     // splice ops
0090     OP_CAT,
0091     OP_SUBSTR,
0092     OP_LEFT,
0093     OP_RIGHT,
0094     OP_SIZE,
0095
0096     // bit logic
0097     OP_INVERT,
0098     OP_AND,
0099     OP_OR,
0100     OP_XOR,
0101     OP_EQUAL,
0102     OP_EQUALVERIFY,
0103     OP_RESERVED1,
0104     OP_RESERVED2,
0105
0106     // numeric
0107     OP_1ADD,
0108     OP_1SUB,
0109     OP_2MUL,
0110     OP_2DIV,
0111     OP_NEGATE,
0112     OP_ABS,
0113     OP_NOT,
0114     OP_0NOTEQUAL,
0115
0116     OP_ADD,
0117     OP_SUB,
0118     OP_MUL,
0119     OP_DIV,
0120     OP_MOD,
0121     OP_LSHIFT,
0122     OP_RSHIFT,
0123
0124     OP_BOOLAND,
0125     OP_BOOLOR,
0126     OP_NUMEQUAL,
0127     OP_NUMEQUALVERIFY,
0128     OP_NUMNOTEQUAL,
0129     OP_LESSTHAN,
0130     OP_GREATERTHAN,
0131     OP_LESSTHANOREQUAL,
0132     OP_GREATERTHANOREQUAL,
0133     OP_MIN,
0134     OP_MAX,
0135
0136     OP_WITHIN,
0137
0138     // crypto
0139     OP_RIPEMD160,
0140     OP_SHA1,
0141     OP_SHA256,
0142     OP_HASH160,
0143     OP_HASH256,
0144     OP_CODESEPARATOR,
0145     OP_CHECKSIG,
0146     OP_CHECKSIGVERIFY,
0147     OP_CHECKMULTISIG,
0148     OP_CHECKMULTISIGVERIFY,
0149
0150     // expansion
0151     OP_NOP1,
0152     OP_NOP2,
0153     OP_NOP3,
0154     OP_NOP4,
0155     OP_NOP5,
0156     OP_NOP6,
0157     OP_NOP7,
0158     OP_NOP8,
0159     OP_NOP9,
0160     OP_NOP10,
0161
0162
0163
0164     // template matching params
0165     OP_PUBKEYHASH = 0xfd,
0166     OP_PUBKEY = 0xfe,
0167
0168     OP_INVALIDOPCODE = 0xff,
0169 };
0170
0171
0172
0173
0174
0175
0176
0177
0178 inline const char* GetOpName(opcodetype opcode)
0179 {
0180     switch (opcode)
0181     {
0182     // push value
0183     case OP_0                      : return "0";
0184     case OP_PUSHDATA1              : return "OP_PUSHDATA1";
0185     case OP_PUSHDATA2              : return "OP_PUSHDATA2";
0186     case OP_PUSHDATA4              : return "OP_PUSHDATA4";
0187     case OP_1NEGATE                : return "-1";
0188     case OP_RESERVED               : return "OP_RESERVED";
0189     case OP_1                      : return "1";
0190     case OP_2                      : return "2";
0191     case OP_3                      : return "3";
0192     case OP_4                      : return "4";
0193     case OP_5                      : return "5";
0194     case OP_6                      : return "6";
0195     case OP_7                      : return "7";
0196     case OP_8                      : return "8";
0197     case OP_9                      : return "9";
0198     case OP_10                     : return "10";
0199     case OP_11                     : return "11";
0200     case OP_12                     : return "12";
0201     case OP_13                     : return "13";
0202     case OP_14                     : return "14";
0203     case OP_15                     : return "15";
0204     case OP_16                     : return "16";
0205
0206     // control
0207     case OP_NOP                    : return "OP_NOP";
0208     case OP_VER                    : return "OP_VER";
0209     case OP_IF                     : return "OP_IF";
0210     case OP_NOTIF                  : return "OP_NOTIF";
0211     case OP_VERIF                  : return "OP_VERIF";
0212     case OP_VERNOTIF               : return "OP_VERNOTIF";
0213     case OP_ELSE                   : return "OP_ELSE";
0214     case OP_ENDIF                  : return "OP_ENDIF";
0215     case OP_VERIFY                 : return "OP_VERIFY";
0216     case OP_RETURN                 : return "OP_RETURN";
0217
0218     // stack ops
0219     case OP_TOALTSTACK             : return "OP_TOALTSTACK";
0220     case OP_FROMALTSTACK           : return "OP_FROMALTSTACK";
0221     case OP_2DROP                  : return "OP_2DROP";
0222     case OP_2DUP                   : return "OP_2DUP";
0223     case OP_3DUP                   : return "OP_3DUP";
0224     case OP_2OVER                  : return "OP_2OVER";
0225     case OP_2ROT                   : return "OP_2ROT";
0226     case OP_2SWAP                  : return "OP_2SWAP";
0227     case OP_IFDUP                  : return "OP_IFDUP";
0228     case OP_DEPTH                  : return "OP_DEPTH";
0229     case OP_DROP                   : return "OP_DROP";
0230     case OP_DUP                    : return "OP_DUP";
0231     case OP_NIP                    : return "OP_NIP";
0232     case OP_OVER                   : return "OP_OVER";
0233     case OP_PICK                   : return "OP_PICK";
0234     case OP_ROLL                   : return "OP_ROLL";
0235     case OP_ROT                    : return "OP_ROT";
0236     case OP_SWAP                   : return "OP_SWAP";
0237     case OP_TUCK                   : return "OP_TUCK";
0238
0239     // splice ops
0240     case OP_CAT                    : return "OP_CAT";
0241     case OP_SUBSTR                 : return "OP_SUBSTR";
0242     case OP_LEFT                   : return "OP_LEFT";
0243     case OP_RIGHT                  : return "OP_RIGHT";
0244     case OP_SIZE                   : return "OP_SIZE";
0245
0246     // bit logic
0247     case OP_INVERT                 : return "OP_INVERT";
0248     case OP_AND                    : return "OP_AND";
0249     case OP_OR                     : return "OP_OR";
0250     case OP_XOR                    : return "OP_XOR";
0251     case OP_EQUAL                  : return "OP_EQUAL";
0252     case OP_EQUALVERIFY            : return "OP_EQUALVERIFY";
0253     case OP_RESERVED1              : return "OP_RESERVED1";
0254     case OP_RESERVED2              : return "OP_RESERVED2";
0255
0256     // numeric
0257     case OP_1ADD                   : return "OP_1ADD";
0258     case OP_1SUB                   : return "OP_1SUB";
0259     case OP_2MUL                   : return "OP_2MUL";
0260     case OP_2DIV                   : return "OP_2DIV";
0261     case OP_NEGATE                 : return "OP_NEGATE";
0262     case OP_ABS                    : return "OP_ABS";
0263     case OP_NOT                    : return "OP_NOT";
0264     case OP_0NOTEQUAL              : return "OP_0NOTEQUAL";
0265     case OP_ADD                    : return "OP_ADD";
0266     case OP_SUB                    : return "OP_SUB";
0267     case OP_MUL                    : return "OP_MUL";
0268     case OP_DIV                    : return "OP_DIV";
0269     case OP_MOD                    : return "OP_MOD";
0270     case OP_LSHIFT                 : return "OP_LSHIFT";
0271     case OP_RSHIFT                 : return "OP_RSHIFT";
0272     case OP_BOOLAND                : return "OP_BOOLAND";
0273     case OP_BOOLOR                 : return "OP_BOOLOR";
0274     case OP_NUMEQUAL               : return "OP_NUMEQUAL";
0275     case OP_NUMEQUALVERIFY         : return "OP_NUMEQUALVERIFY";
0276     case OP_NUMNOTEQUAL            : return "OP_NUMNOTEQUAL";
0277     case OP_LESSTHAN               : return "OP_LESSTHAN";
0278     case OP_GREATERTHAN            : return "OP_GREATERTHAN";
0279     case OP_LESSTHANOREQUAL        : return "OP_LESSTHANOREQUAL";
0280     case OP_GREATERTHANOREQUAL     : return "OP_GREATERTHANOREQUAL";
0281     case OP_MIN                    : return "OP_MIN";
0282     case OP_MAX                    : return "OP_MAX";
0283     case OP_WITHIN                 : return "OP_WITHIN";
0284
0285     // crypto
0286     case OP_RIPEMD160              : return "OP_RIPEMD160";
0287     case OP_SHA1                   : return "OP_SHA1";
0288     case OP_SHA256                 : return "OP_SHA256";
0289     case OP_HASH160                : return "OP_HASH160";
0290     case OP_HASH256                : return "OP_HASH256";
0291     case OP_CODESEPARATOR          : return "OP_CODESEPARATOR";
0292     case OP_CHECKSIG               : return "OP_CHECKSIG";
0293     case OP_CHECKSIGVERIFY         : return "OP_CHECKSIGVERIFY";
0294     case OP_CHECKMULTISIG          : return "OP_CHECKMULTISIG";
0295     case OP_CHECKMULTISIGVERIFY    : return "OP_CHECKMULTISIGVERIFY";
0296
0297     // expanson
0298     case OP_NOP1                   : return "OP_NOP1";
0299     case OP_NOP2                   : return "OP_NOP2";
0300     case OP_NOP3                   : return "OP_NOP3";
0301     case OP_NOP4                   : return "OP_NOP4";
0302     case OP_NOP5                   : return "OP_NOP5";
0303     case OP_NOP6                   : return "OP_NOP6";
0304     case OP_NOP7                   : return "OP_NOP7";
0305     case OP_NOP8                   : return "OP_NOP8";
0306     case OP_NOP9                   : return "OP_NOP9";
0307     case OP_NOP10                  : return "OP_NOP10";
0308
0309
0310
0311     // template matching params
0312     case OP_PUBKEYHASH             : return "OP_PUBKEYHASH";
0313     case OP_PUBKEY                 : return "OP_PUBKEY";
0314
0315     case OP_INVALIDOPCODE          : return "OP_INVALIDOPCODE";
0316     default:
0317         return "OP_UNKNOWN";
0318     }
0319 };
0320
0321
0322
0323
0324 inline std::string ValueString(const std::vector<unsigned char>& vch)
0325 {
0326     if (vch.size() <= 4)
0327         return strprintf("%d", CBigNum(vch).getint());
0328     else
0329         return HexStr(vch);
0330 }
0331
0332 inline std::string StackString(const std::vector<std::vector<unsigned char> >& vStack)
0333 {
0334     std::string str;
0335     BOOST_FOREACH(const std::vector<unsigned char>& vch, vStack)
0336     {
0337         if (!str.empty())
0338             str += " ";
0339         str += ValueString(vch);
0340     }
0341     return str;
0342 }
0343
0344
0345
0346
0347
0348
0349
0350
0351
0352 class CScript : public std::vector<unsigned char>
0353 {
0354 protected:
0355     CScript& push_int64(int64 n)
0356     {
0357         if (n == -1 || (n >= 1 && n <= 16))
0358         {
0359             push_back(n + (OP_1 - 1));
0360         }
0361         else
0362         {
0363             CBigNum bn(n);
0364             *this << bn.getvch();
0365         }
0366         return *this;
0367     }
0368
0369     CScript& push_uint64(uint64 n)
0370     {
0371         if (n >= 1 && n <= 16)
0372         {
0373             push_back(n + (OP_1 - 1));
0374         }
0375         else
0376         {
0377             CBigNum bn(n);
0378             *this << bn.getvch();
0379         }
0380         return *this;
0381     }
0382
0383 public:
0384     CScript() { }
0385     CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { }
0386     CScript(const_iterator pbegin, const_iterator pend) : std::vector<unsigned char>(pbegin, pend) { }
0387     CScript(const unsigned char* pbegin, const unsigned char* pend) : std::vector<unsigned char>(pbegin, pend) { }
0388
0389     CScript& operator+=(const CScript& b)
0390     {
0391         insert(end(), b.begin(), b.end());
0392         return *this;
0393     }
0394
0395     friend CScript operator+(const CScript& a, const CScript& b)
0396     {
0397         CScript ret = a;
0398         ret += b;
0399         return ret;
0400     }
0401
0402
0403     explicit CScript(char b)           { operator<<(b); }
0404     explicit CScript(short b)          { operator<<(b); }
0405     explicit CScript(int b)            { operator<<(b); }
0406     explicit CScript(long b)           { operator<<(b); }
0407     explicit CScript(int64 b)          { operator<<(b); }
0408     explicit CScript(unsigned char b)  { operator<<(b); }
0409     explicit CScript(unsigned int b)   { operator<<(b); }
0410     explicit CScript(unsigned short b) { operator<<(b); }
0411     explicit CScript(unsigned long b)  { operator<<(b); }
0412     explicit CScript(uint64 b)         { operator<<(b); }
0413
0414     explicit CScript(opcodetype b)     { operator<<(b); }
0415     explicit CScript(const uint256& b) { operator<<(b); }
0416     explicit CScript(const CBigNum& b) { operator<<(b); }
0417     explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); }
0418
0419
0420     CScript& operator<<(char b)           { return push_int64(b); }
0421     CScript& operator<<(short b)          { return push_int64(b); }
0422     CScript& operator<<(int b)            { return push_int64(b); }
0423     CScript& operator<<(long b)           { return push_int64(b); }
0424     CScript& operator<<(int64 b)          { return push_int64(b); }
0425     CScript& operator<<(unsigned char b)  { return push_uint64(b); }
0426     CScript& operator<<(unsigned int b)   { return push_uint64(b); }
0427     CScript& operator<<(unsigned short b) { return push_uint64(b); }
0428     CScript& operator<<(unsigned long b)  { return push_uint64(b); }
0429     CScript& operator<<(uint64 b)         { return push_uint64(b); }
0430
0431     CScript& operator<<(opcodetype opcode)
0432     {
0433         if (opcode < 0 || opcode > 0xff)
0434             throw std::runtime_error("CScript::operator<<() : invalid opcode");
0435         insert(end(), (unsigned char)opcode);
0436         return *this;
0437     }
0438
0439     CScript& operator<<(const uint160& b)
0440     {
0441         insert(end(), sizeof(b));
0442         insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
0443         return *this;
0444     }
0445
0446     CScript& operator<<(const uint256& b)
0447     {
0448         insert(end(), sizeof(b));
0449         insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
0450         return *this;
0451     }
0452
0453     CScript& operator<<(const CBigNum& b)
0454     {
0455         *this << b.getvch();
0456         return *this;
0457     }
0458
0459     CScript& operator<<(const std::vector<unsigned char>& b)
0460     {
0461         if (b.size() < OP_PUSHDATA1)
0462         {
0463             insert(end(), (unsigned char)b.size());
0464         }
0465         else if (b.size() <= 0xff)
0466         {
0467             insert(end(), OP_PUSHDATA1);
0468             insert(end(), (unsigned char)b.size());
0469         }
0470         else if (b.size() <= 0xffff)
0471         {
0472             insert(end(), OP_PUSHDATA2);
0473             unsigned short nSize = b.size();
0474             insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
0475         }
0476         else
0477         {
0478             insert(end(), OP_PUSHDATA4);
0479             unsigned int nSize = b.size();
0480             insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
0481         }
0482         insert(end(), b.begin(), b.end());
0483         return *this;
0484     }
0485
0486     CScript& operator<<(const CScript& b)
0487     {
0488         // I'm not sure if this should push the script or concatenate scripts.
0489         // If there's ever a use for pushing a script onto a script, delete this member fn
0490         assert(!"warning: pushing a CScript onto a CScript with << is probably not intended, use + to concatenate");
0491         return *this;
0492     }
0493
0494
0495     bool GetOp(iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet)
0496     {
0497          // Wrapper so it can be called with either iterator or const_iterator
0498          const_iterator pc2 = pc;
0499          bool fRet = GetOp2(pc2, opcodeRet, &vchRet);
0500          pc = begin() + (pc2 - begin());
0501          return fRet;
0502     }
0503
0504     bool GetOp(iterator& pc, opcodetype& opcodeRet)
0505     {
0506          const_iterator pc2 = pc;
0507          bool fRet = GetOp2(pc2, opcodeRet, NULL);
0508          pc = begin() + (pc2 - begin());
0509          return fRet;
0510     }
0511
0512     bool GetOp(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet) const
0513     {
0514         return GetOp2(pc, opcodeRet, &vchRet);
0515     }
0516
0517     bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const
0518     {
0519         return GetOp2(pc, opcodeRet, NULL);
0520     }
0521
0522     bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet) const
0523     {
0524         opcodeRet = OP_INVALIDOPCODE;
0525         if (pvchRet)
0526             pvchRet->clear();
0527         if (pc >= end())
0528             return false;
0529
0530         // Read instruction
0531         if (end() - pc < 1)
0532             return false;
0533         unsigned int opcode = *pc++;
0534
0535         // Immediate operand
0536         if (opcode <= OP_PUSHDATA4)
0537         {
0538             unsigned int nSize;
0539             if (opcode < OP_PUSHDATA1)
0540             {
0541                 nSize = opcode;
0542             }
0543             else if (opcode == OP_PUSHDATA1)
0544             {
0545                 if (end() - pc < 1)
0546                     return false;
0547                 nSize = *pc++;
0548             }
0549             else if (opcode == OP_PUSHDATA2)
0550             {
0551                 if (end() - pc < 2)
0552                     return false;
0553                 nSize = 0;
0554                 memcpy(&nSize, &pc[0], 2);
0555                 pc += 2;
0556             }
0557             else if (opcode == OP_PUSHDATA4)
0558             {
0559                 if (end() - pc < 4)
0560                     return false;
0561                 memcpy(&nSize, &pc[0], 4);
0562                 pc += 4;
0563             }
0564             if (end() - pc < nSize)
0565                 return false;
0566             if (pvchRet)
0567                 pvchRet->assign(pc, pc + nSize);
0568             pc += nSize;
0569         }
0570
0571         opcodeRet = (opcodetype)opcode;
0572         return true;
0573     }
0574
0575
0576     void FindAndDelete(const CScript& b)
0577     {
0578         if (b.empty())
0579             return;
0580         iterator pc = begin();
0581         opcodetype opcode;
0582         do
0583         {
0584             while (end() - pc >= b.size() && memcmp(&pc[0], &b[0], b.size()) == 0)
0585                 erase(pc, pc + b.size());
0586         }
0587         while (GetOp(pc, opcode));
0588     }
0589
0590
0591     int GetSigOpCount() const
0592     {
0593         int n = 0;
0594         const_iterator pc = begin();
0595         while (pc < end())
0596         {
0597             opcodetype opcode;
0598             if (!GetOp(pc, opcode))
0599                 break;
0600             if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
0601                 n++;
0602             else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
0603                 n += 20;
0604         }
0605         return n;
0606     }
0607
0608
0609     bool IsPushOnly() const
0610     {
0611         if (size() > 200)
0612             return false;
0613         const_iterator pc = begin();
0614         while (pc < end())
0615         {
0616             opcodetype opcode;
0617             if (!GetOp(pc, opcode))
0618                 return false;
0619             if (opcode > OP_16)
0620                 return false;
0621         }
0622         return true;
0623     }
0624
0625
0626     CBitcoinAddress GetBitcoinAddress() const
0627     {
0628         opcodetype opcode;
0629         std::vector<unsigned char> vch;
0630         CScript::const_iterator pc = begin();
0631         if (!GetOp(pc, opcode, vch) || opcode != OP_DUP) return 0;
0632         if (!GetOp(pc, opcode, vch) || opcode != OP_HASH160) return 0;
0633         if (!GetOp(pc, opcode, vch) || vch.size() != sizeof(uint160)) return 0;
0634         uint160 hash160 = uint160(vch);
0635         if (!GetOp(pc, opcode, vch) || opcode != OP_EQUALVERIFY) return 0;
0636         if (!GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG) return 0;
0637         if (pc != end()) return 0;
0638         return CBitcoinAddress(hash160);
0639     }
0640
0641     void SetBitcoinAddress(const CBitcoinAddress& address)
0642     {
0643         this->clear();
0644         *this << OP_DUP << OP_HASH160 << address.GetHash160() << OP_EQUALVERIFY << OP_CHECKSIG;
0645     }
0646
0647     void SetBitcoinAddress(const std::vector<unsigned char>& vchPubKey)
0648     {
0649         SetBitcoinAddress(CBitcoinAddress(vchPubKey));
0650     }
0651
0652
0653     void PrintHex() const
0654     {
0655         printf("CScript(%s)\n", HexStr(begin(), end(), true).c_str());
0656     }
0657
0658     std::string ToString() const
0659     {
0660         std::string str;
0661         opcodetype opcode;
0662         std::vector<unsigned char> vch;
0663         const_iterator pc = begin();
0664         while (pc < end())
0665         {
0666             if (!str.empty())
0667                 str += " ";
0668             if (!GetOp(pc, opcode, vch))
0669             {
0670                 str += "[error]";
0671                 return str;
0672             }
0673             if (0 <= opcode && opcode <= OP_PUSHDATA4)
0674                 str += ValueString(vch);
0675             else
0676                 str += GetOpName(opcode);
0677         }
0678         return str;
0679     }
0680
0681     void print() const
0682     {
0683         printf("%s\n", ToString().c_str());
0684     }
0685 };
0686
0687
0688
0689
0690
0691
0692
0693 bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
0694
0695 bool IsStandard(const CScript& scriptPubKey);
0696 bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
0697 bool ExtractAddress(const CScript& scriptPubKey, const CKeyStore* pkeystore, CBitcoinAddress& addressRet);
0698 bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL, CScript scriptPrereq=CScript());
0699 bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int nHashType=0);
0700
0701 #endif