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575 lines
15 KiB
575 lines
15 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Copyright (c) 2009-2012 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 <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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class CKeyStore; |
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/** Signature hash types/flags */ |
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enum |
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{ |
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SIGHASH_ALL = 1, |
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SIGHASH_NONE = 2, |
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SIGHASH_SINGLE = 3, |
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SIGHASH_ANYONECANPAY = 0x80, |
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}; |
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enum txnouttype |
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{ |
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TX_NONSTANDARD, |
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// 'standard' transaction types: |
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TX_PUBKEY, |
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TX_PUBKEYHASH, |
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TX_SCRIPTHASH, |
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TX_MULTISIG, |
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}; |
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const char* GetTxnOutputType(txnouttype t); |
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/** Script opcodes */ |
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enum opcodetype |
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{ |
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// push value |
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OP_0 = 0x00, |
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OP_FALSE = OP_0, |
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OP_PUSHDATA1 = 0x4c, |
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OP_PUSHDATA2 = 0x4d, |
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OP_PUSHDATA4 = 0x4e, |
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OP_1NEGATE = 0x4f, |
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OP_RESERVED = 0x50, |
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OP_1 = 0x51, |
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OP_TRUE=OP_1, |
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OP_2 = 0x52, |
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OP_3 = 0x53, |
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OP_4 = 0x54, |
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OP_5 = 0x55, |
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OP_6 = 0x56, |
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OP_7 = 0x57, |
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OP_8 = 0x58, |
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OP_9 = 0x59, |
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OP_10 = 0x5a, |
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OP_11 = 0x5b, |
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OP_12 = 0x5c, |
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OP_13 = 0x5d, |
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OP_14 = 0x5e, |
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OP_15 = 0x5f, |
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OP_16 = 0x60, |
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// control |
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OP_NOP = 0x61, |
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OP_VER = 0x62, |
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OP_IF = 0x63, |
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OP_NOTIF = 0x64, |
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OP_VERIF = 0x65, |
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OP_VERNOTIF = 0x66, |
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OP_ELSE = 0x67, |
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OP_ENDIF = 0x68, |
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OP_VERIFY = 0x69, |
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OP_RETURN = 0x6a, |
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// stack ops |
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OP_TOALTSTACK = 0x6b, |
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OP_FROMALTSTACK = 0x6c, |
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OP_2DROP = 0x6d, |
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OP_2DUP = 0x6e, |
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OP_3DUP = 0x6f, |
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OP_2OVER = 0x70, |
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OP_2ROT = 0x71, |
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OP_2SWAP = 0x72, |
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OP_IFDUP = 0x73, |
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OP_DEPTH = 0x74, |
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OP_DROP = 0x75, |
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OP_DUP = 0x76, |
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OP_NIP = 0x77, |
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OP_OVER = 0x78, |
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OP_PICK = 0x79, |
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OP_ROLL = 0x7a, |
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OP_ROT = 0x7b, |
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OP_SWAP = 0x7c, |
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OP_TUCK = 0x7d, |
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// splice ops |
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OP_CAT = 0x7e, |
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OP_SUBSTR = 0x7f, |
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OP_LEFT = 0x80, |
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OP_RIGHT = 0x81, |
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OP_SIZE = 0x82, |
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// bit logic |
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OP_INVERT = 0x83, |
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OP_AND = 0x84, |
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OP_OR = 0x85, |
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OP_XOR = 0x86, |
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OP_EQUAL = 0x87, |
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OP_EQUALVERIFY = 0x88, |
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OP_RESERVED1 = 0x89, |
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OP_RESERVED2 = 0x8a, |
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// numeric |
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OP_1ADD = 0x8b, |
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OP_1SUB = 0x8c, |
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OP_2MUL = 0x8d, |
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OP_2DIV = 0x8e, |
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OP_NEGATE = 0x8f, |
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OP_ABS = 0x90, |
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OP_NOT = 0x91, |
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OP_0NOTEQUAL = 0x92, |
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OP_ADD = 0x93, |
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OP_SUB = 0x94, |
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OP_MUL = 0x95, |
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OP_DIV = 0x96, |
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OP_MOD = 0x97, |
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OP_LSHIFT = 0x98, |
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OP_RSHIFT = 0x99, |
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OP_BOOLAND = 0x9a, |
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OP_BOOLOR = 0x9b, |
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OP_NUMEQUAL = 0x9c, |
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OP_NUMEQUALVERIFY = 0x9d, |
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OP_NUMNOTEQUAL = 0x9e, |
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OP_LESSTHAN = 0x9f, |
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OP_GREATERTHAN = 0xa0, |
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OP_LESSTHANOREQUAL = 0xa1, |
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OP_GREATERTHANOREQUAL = 0xa2, |
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OP_MIN = 0xa3, |
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OP_MAX = 0xa4, |
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OP_WITHIN = 0xa5, |
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// crypto |
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OP_RIPEMD160 = 0xa6, |
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OP_SHA1 = 0xa7, |
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OP_SHA256 = 0xa8, |
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OP_HASH160 = 0xa9, |
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OP_HASH256 = 0xaa, |
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OP_CODESEPARATOR = 0xab, |
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OP_CHECKSIG = 0xac, |
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OP_CHECKSIGVERIFY = 0xad, |
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OP_CHECKMULTISIG = 0xae, |
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OP_CHECKMULTISIGVERIFY = 0xaf, |
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// expansion |
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OP_NOP1 = 0xb0, |
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OP_NOP2 = 0xb1, |
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OP_NOP3 = 0xb2, |
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OP_NOP4 = 0xb3, |
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OP_NOP5 = 0xb4, |
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OP_NOP6 = 0xb5, |
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OP_NOP7 = 0xb6, |
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OP_NOP8 = 0xb7, |
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OP_NOP9 = 0xb8, |
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OP_NOP10 = 0xb9, |
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// template matching params |
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OP_SMALLINTEGER = 0xfa, |
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OP_PUBKEYS = 0xfb, |
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OP_PUBKEYHASH = 0xfd, |
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OP_PUBKEY = 0xfe, |
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OP_INVALIDOPCODE = 0xff, |
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}; |
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const char* GetOpName(opcodetype opcode); |
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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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/** Serialized script, used inside transaction inputs and outputs */ |
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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) is not portable. Use 'signed char' or 'unsigned char'. |
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explicit CScript(signed 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) is not portable. Use 'signed char' or 'unsigned char'. |
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CScript& operator<<(signed 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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// Encode/decode small integers: |
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static int DecodeOP_N(opcodetype opcode) |
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{ |
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if (opcode == OP_0) |
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return 0; |
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assert(opcode >= OP_1 && opcode <= OP_16); |
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return (int)opcode - (int)(OP_1 - 1); |
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} |
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static opcodetype EncodeOP_N(int n) |
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{ |
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assert(n >= 0 && n <= 16); |
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if (n == 0) |
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return OP_0; |
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return (opcodetype)(OP_1+n-1); |
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} |
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int FindAndDelete(const CScript& b) |
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{ |
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int nFound = 0; |
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if (b.empty()) |
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return nFound; |
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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 >= (long)b.size() && memcmp(&pc[0], &b[0], b.size()) == 0) |
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{ |
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erase(pc, pc + b.size()); |
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++nFound; |
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} |
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} |
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while (GetOp(pc, opcode)); |
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return nFound; |
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} |
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int Find(opcodetype op) const |
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{ |
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int nFound = 0; |
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opcodetype opcode; |
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for (const_iterator pc = begin(); pc != end() && GetOp(pc, opcode);) |
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if (opcode == op) |
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++nFound; |
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return nFound; |
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} |
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// Pre-version-0.6, Bitcoin always counted CHECKMULTISIGs |
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// as 20 sigops. With pay-to-script-hash, that changed: |
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// CHECKMULTISIGs serialized in scriptSigs are |
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// counted more accurately, assuming they are of the form |
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// ... OP_N CHECKMULTISIG ... |
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unsigned int GetSigOpCount(bool fAccurate) const; |
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// Accurately count sigOps, including sigOps in |
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// pay-to-script-hash transactions: |
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unsigned int GetSigOpCount(const CScript& scriptSig) const; |
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bool IsPayToScriptHash() const; |
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// Called by CTransaction::IsStandard |
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bool IsPushOnly() const |
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{ |
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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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void SetBitcoinAddress(const CBitcoinAddress& address); |
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void SetBitcoinAddress(const std::vector<unsigned char>& vchPubKey) |
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{ |
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SetBitcoinAddress(CBitcoinAddress(vchPubKey)); |
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} |
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void SetMultisig(int nRequired, const std::vector<CKey>& keys); |
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void SetPayToScriptHash(const CScript& subscript); |
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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 Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet); |
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int ScriptSigArgsExpected(txnouttype t, const std::vector<std::vector<unsigned char> >& vSolutions); |
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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, CBitcoinAddress& addressRet); |
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bool ExtractAddresses(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CBitcoinAddress>& addressRet, int& nRequiredRet); |
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bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL); |
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bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType); |
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#endif
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