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404 lines
11 KiB
C++
404 lines
11 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2011 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file license.txt or http://www.opensource.org/licenses/mit-license.php.
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#ifndef H_BITCOIN_SCRIPT
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#define H_BITCOIN_SCRIPT
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#include "base58.h"
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#include "keystore.h"
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#include <string>
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#include <vector>
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#include <boost/foreach.hpp>
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class CTransaction;
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inline std::string ValueString(const std::vector<unsigned char>& vch)
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{
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if (vch.size() <= 4)
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return strprintf("%d", CBigNum(vch).getint());
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else
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return HexStr(vch);
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}
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inline std::string StackString(const std::vector<std::vector<unsigned char> >& vStack)
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{
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std::string str;
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BOOST_FOREACH(const std::vector<unsigned char>& vch, vStack)
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{
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if (!str.empty())
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str += " ";
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str += ValueString(vch);
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}
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return str;
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}
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class CScript : public std::vector<unsigned char>
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{
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protected:
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CScript& push_int64(int64 n)
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{
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if (n == -1 || (n >= 1 && n <= 16))
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{
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push_back(n + (OP_1 - 1));
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}
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else
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{
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CBigNum bn(n);
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*this << bn.getvch();
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}
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return *this;
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}
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CScript& push_uint64(uint64 n)
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{
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if (n >= 1 && n <= 16)
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{
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push_back(n + (OP_1 - 1));
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}
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else
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{
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CBigNum bn(n);
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*this << bn.getvch();
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}
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return *this;
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}
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public:
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CScript() { }
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CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { }
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CScript(const_iterator pbegin, const_iterator pend) : std::vector<unsigned char>(pbegin, pend) { }
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#ifndef _MSC_VER
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CScript(const unsigned char* pbegin, const unsigned char* pend) : std::vector<unsigned char>(pbegin, pend) { }
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#endif
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CScript& operator+=(const CScript& b)
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{
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insert(end(), b.begin(), b.end());
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return *this;
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}
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friend CScript operator+(const CScript& a, const CScript& b)
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{
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CScript ret = a;
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ret += b;
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return ret;
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}
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explicit CScript(char b) { operator<<(b); }
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explicit CScript(short b) { operator<<(b); }
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explicit CScript(int b) { operator<<(b); }
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explicit CScript(long b) { operator<<(b); }
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explicit CScript(int64 b) { operator<<(b); }
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explicit CScript(unsigned char b) { operator<<(b); }
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explicit CScript(unsigned int b) { operator<<(b); }
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explicit CScript(unsigned short b) { operator<<(b); }
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explicit CScript(unsigned long b) { operator<<(b); }
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explicit CScript(uint64 b) { operator<<(b); }
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explicit CScript(opcodetype b) { operator<<(b); }
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explicit CScript(const uint256& b) { operator<<(b); }
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explicit CScript(const CBigNum& b) { operator<<(b); }
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explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); }
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CScript& operator<<(char b) { return push_int64(b); }
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CScript& operator<<(short b) { return push_int64(b); }
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CScript& operator<<(int b) { return push_int64(b); }
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CScript& operator<<(long b) { return push_int64(b); }
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CScript& operator<<(int64 b) { return push_int64(b); }
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CScript& operator<<(unsigned char b) { return push_uint64(b); }
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CScript& operator<<(unsigned int b) { return push_uint64(b); }
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CScript& operator<<(unsigned short b) { return push_uint64(b); }
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CScript& operator<<(unsigned long b) { return push_uint64(b); }
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CScript& operator<<(uint64 b) { return push_uint64(b); }
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CScript& operator<<(opcodetype opcode)
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{
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if (opcode < 0 || opcode > 0xff)
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throw std::runtime_error("CScript::operator<<() : invalid opcode");
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insert(end(), (unsigned char)opcode);
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return *this;
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}
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CScript& operator<<(const uint160& b)
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{
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insert(end(), sizeof(b));
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insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
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return *this;
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}
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CScript& operator<<(const uint256& b)
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{
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insert(end(), sizeof(b));
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insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
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return *this;
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}
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CScript& operator<<(const CBigNum& b)
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{
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*this << b.getvch();
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return *this;
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}
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CScript& operator<<(const std::vector<unsigned char>& b)
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{
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if (b.size() < OP_PUSHDATA1)
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{
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insert(end(), (unsigned char)b.size());
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}
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else if (b.size() <= 0xff)
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{
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insert(end(), OP_PUSHDATA1);
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insert(end(), (unsigned char)b.size());
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}
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else if (b.size() <= 0xffff)
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{
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insert(end(), OP_PUSHDATA2);
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unsigned short nSize = b.size();
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insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
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}
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else
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{
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insert(end(), OP_PUSHDATA4);
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unsigned int nSize = b.size();
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insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
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}
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insert(end(), b.begin(), b.end());
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return *this;
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}
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CScript& operator<<(const CScript& b)
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{
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// I'm not sure if this should push the script or concatenate scripts.
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// If there's ever a use for pushing a script onto a script, delete this member fn
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assert(!"warning: pushing a CScript onto a CScript with << is probably not intended, use + to concatenate");
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return *this;
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}
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bool GetOp(iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet)
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{
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// Wrapper so it can be called with either iterator or const_iterator
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const_iterator pc2 = pc;
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bool fRet = GetOp2(pc2, opcodeRet, &vchRet);
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pc = begin() + (pc2 - begin());
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return fRet;
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}
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bool GetOp(iterator& pc, opcodetype& opcodeRet)
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{
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const_iterator pc2 = pc;
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bool fRet = GetOp2(pc2, opcodeRet, NULL);
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pc = begin() + (pc2 - begin());
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return fRet;
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}
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bool GetOp(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet) const
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{
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return GetOp2(pc, opcodeRet, &vchRet);
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}
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bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const
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{
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return GetOp2(pc, opcodeRet, NULL);
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}
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bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet) const
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{
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opcodeRet = OP_INVALIDOPCODE;
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if (pvchRet)
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pvchRet->clear();
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if (pc >= end())
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return false;
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// Read instruction
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if (end() - pc < 1)
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return false;
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unsigned int opcode = *pc++;
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// Immediate operand
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if (opcode <= OP_PUSHDATA4)
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{
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unsigned int nSize;
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if (opcode < OP_PUSHDATA1)
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{
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nSize = opcode;
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}
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else if (opcode == OP_PUSHDATA1)
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{
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if (end() - pc < 1)
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return false;
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nSize = *pc++;
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}
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else if (opcode == OP_PUSHDATA2)
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{
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if (end() - pc < 2)
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return false;
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nSize = 0;
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memcpy(&nSize, &pc[0], 2);
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pc += 2;
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}
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else if (opcode == OP_PUSHDATA4)
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{
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if (end() - pc < 4)
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return false;
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memcpy(&nSize, &pc[0], 4);
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pc += 4;
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}
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if (end() - pc < nSize)
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return false;
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if (pvchRet)
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pvchRet->assign(pc, pc + nSize);
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pc += nSize;
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}
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opcodeRet = (opcodetype)opcode;
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return true;
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}
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void FindAndDelete(const CScript& b)
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{
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if (b.empty())
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return;
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iterator pc = begin();
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opcodetype opcode;
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do
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{
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while (end() - pc >= b.size() && memcmp(&pc[0], &b[0], b.size()) == 0)
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erase(pc, pc + b.size());
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}
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while (GetOp(pc, opcode));
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}
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int GetSigOpCount() const
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{
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int n = 0;
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const_iterator pc = begin();
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while (pc < end())
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{
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opcodetype opcode;
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if (!GetOp(pc, opcode))
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break;
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if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
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n++;
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else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
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n += 20;
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}
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return n;
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}
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bool IsPushOnly() const
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{
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if (size() > 200)
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return false;
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const_iterator pc = begin();
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while (pc < end())
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{
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opcodetype opcode;
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if (!GetOp(pc, opcode))
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return false;
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if (opcode > OP_16)
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return false;
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}
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return true;
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}
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NewcoinAddress GetBitcoinAddress() const
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{
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opcodetype opcode;
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std::vector<unsigned char> vch;
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CScript::const_iterator pc = begin();
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if (!GetOp(pc, opcode, vch) || opcode != OP_DUP) return 0;
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if (!GetOp(pc, opcode, vch) || opcode != OP_HASH160) return 0;
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if (!GetOp(pc, opcode, vch) || vch.size() != sizeof(uint160)) return 0;
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uint160 hash160 = uint160(vch);
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if (!GetOp(pc, opcode, vch) || opcode != OP_EQUALVERIFY) return 0;
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if (!GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG) return 0;
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if (pc != end()) return 0;
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return NewcoinAddress(hash160);
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}
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void SetBitcoinAddress(const NewcoinAddress& address)
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{
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this->clear();
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*this << OP_DUP << OP_HASH160 << address.GetHash160()) << OP_EQUALVERIFY << OP_CHECKSIG;
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}
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void SetBitcoinAddress(const std::vector<unsigned char>& vchPubKey)
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{
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SetBitcoinAddress(NewcoinAddress(vchPubKey));
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}
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void PrintHex() const
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{
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printf("CScript(%s)\n", HexStr(begin(), end(), true).c_str());
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}
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std::string ToString() const
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{
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std::string str;
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opcodetype opcode;
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std::vector<unsigned char> vch;
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const_iterator pc = begin();
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while (pc < end())
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{
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if (!str.empty())
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str += " ";
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if (!GetOp(pc, opcode, vch))
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{
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str += "[error]";
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return str;
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}
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if (0 <= opcode && opcode <= OP_PUSHDATA4)
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str += ValueString(vch);
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else
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str += GetOpName(opcode);
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}
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return str;
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}
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void print() const
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{
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printf("%s\n", ToString().c_str());
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}
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};
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bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
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bool IsStandard(const CScript& scriptPubKey);
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bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
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bool ExtractAddress(const CScript& scriptPubKey, const CKeyStore* pkeystore, NewcoinAddress& addressRet);
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bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL, CScript scriptPrereq=CScript());
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bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int nHashType=0);
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#endif
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