jtimon
10 years ago
committed by
Pieter Wuille
19 changed files with 957 additions and 934 deletions
@ -0,0 +1,295 @@
@@ -0,0 +1,295 @@
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "script.h" |
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#include <boost/foreach.hpp> |
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using namespace std; |
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const char* GetOpName(opcodetype opcode) |
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{ |
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switch (opcode) |
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{ |
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// push value
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case OP_0 : return "0"; |
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case OP_PUSHDATA1 : return "OP_PUSHDATA1"; |
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case OP_PUSHDATA2 : return "OP_PUSHDATA2"; |
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case OP_PUSHDATA4 : return "OP_PUSHDATA4"; |
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case OP_1NEGATE : return "-1"; |
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case OP_RESERVED : return "OP_RESERVED"; |
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case OP_1 : return "1"; |
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case OP_2 : return "2"; |
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case OP_3 : return "3"; |
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case OP_4 : return "4"; |
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case OP_5 : return "5"; |
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case OP_6 : return "6"; |
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case OP_7 : return "7"; |
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case OP_8 : return "8"; |
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case OP_9 : return "9"; |
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case OP_10 : return "10"; |
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case OP_11 : return "11"; |
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case OP_12 : return "12"; |
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case OP_13 : return "13"; |
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case OP_14 : return "14"; |
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case OP_15 : return "15"; |
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case OP_16 : return "16"; |
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// control
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case OP_NOP : return "OP_NOP"; |
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case OP_VER : return "OP_VER"; |
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case OP_IF : return "OP_IF"; |
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case OP_NOTIF : return "OP_NOTIF"; |
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case OP_VERIF : return "OP_VERIF"; |
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case OP_VERNOTIF : return "OP_VERNOTIF"; |
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case OP_ELSE : return "OP_ELSE"; |
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case OP_ENDIF : return "OP_ENDIF"; |
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case OP_VERIFY : return "OP_VERIFY"; |
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case OP_RETURN : return "OP_RETURN"; |
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// stack ops
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case OP_TOALTSTACK : return "OP_TOALTSTACK"; |
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case OP_FROMALTSTACK : return "OP_FROMALTSTACK"; |
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case OP_2DROP : return "OP_2DROP"; |
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case OP_2DUP : return "OP_2DUP"; |
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case OP_3DUP : return "OP_3DUP"; |
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case OP_2OVER : return "OP_2OVER"; |
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case OP_2ROT : return "OP_2ROT"; |
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case OP_2SWAP : return "OP_2SWAP"; |
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case OP_IFDUP : return "OP_IFDUP"; |
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case OP_DEPTH : return "OP_DEPTH"; |
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case OP_DROP : return "OP_DROP"; |
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case OP_DUP : return "OP_DUP"; |
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case OP_NIP : return "OP_NIP"; |
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case OP_OVER : return "OP_OVER"; |
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case OP_PICK : return "OP_PICK"; |
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case OP_ROLL : return "OP_ROLL"; |
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case OP_ROT : return "OP_ROT"; |
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case OP_SWAP : return "OP_SWAP"; |
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case OP_TUCK : return "OP_TUCK"; |
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// splice ops
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case OP_CAT : return "OP_CAT"; |
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case OP_SUBSTR : return "OP_SUBSTR"; |
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case OP_LEFT : return "OP_LEFT"; |
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case OP_RIGHT : return "OP_RIGHT"; |
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case OP_SIZE : return "OP_SIZE"; |
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// bit logic
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case OP_INVERT : return "OP_INVERT"; |
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case OP_AND : return "OP_AND"; |
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case OP_OR : return "OP_OR"; |
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case OP_XOR : return "OP_XOR"; |
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case OP_EQUAL : return "OP_EQUAL"; |
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case OP_EQUALVERIFY : return "OP_EQUALVERIFY"; |
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case OP_RESERVED1 : return "OP_RESERVED1"; |
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case OP_RESERVED2 : return "OP_RESERVED2"; |
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// numeric
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case OP_1ADD : return "OP_1ADD"; |
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case OP_1SUB : return "OP_1SUB"; |
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case OP_2MUL : return "OP_2MUL"; |
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case OP_2DIV : return "OP_2DIV"; |
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case OP_NEGATE : return "OP_NEGATE"; |
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case OP_ABS : return "OP_ABS"; |
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case OP_NOT : return "OP_NOT"; |
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case OP_0NOTEQUAL : return "OP_0NOTEQUAL"; |
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case OP_ADD : return "OP_ADD"; |
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case OP_SUB : return "OP_SUB"; |
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case OP_MUL : return "OP_MUL"; |
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case OP_DIV : return "OP_DIV"; |
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case OP_MOD : return "OP_MOD"; |
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case OP_LSHIFT : return "OP_LSHIFT"; |
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case OP_RSHIFT : return "OP_RSHIFT"; |
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case OP_BOOLAND : return "OP_BOOLAND"; |
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case OP_BOOLOR : return "OP_BOOLOR"; |
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case OP_NUMEQUAL : return "OP_NUMEQUAL"; |
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case OP_NUMEQUALVERIFY : return "OP_NUMEQUALVERIFY"; |
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case OP_NUMNOTEQUAL : return "OP_NUMNOTEQUAL"; |
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case OP_LESSTHAN : return "OP_LESSTHAN"; |
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case OP_GREATERTHAN : return "OP_GREATERTHAN"; |
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case OP_LESSTHANOREQUAL : return "OP_LESSTHANOREQUAL"; |
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case OP_GREATERTHANOREQUAL : return "OP_GREATERTHANOREQUAL"; |
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case OP_MIN : return "OP_MIN"; |
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case OP_MAX : return "OP_MAX"; |
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case OP_WITHIN : return "OP_WITHIN"; |
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// crypto
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case OP_RIPEMD160 : return "OP_RIPEMD160"; |
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case OP_SHA1 : return "OP_SHA1"; |
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case OP_SHA256 : return "OP_SHA256"; |
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case OP_HASH160 : return "OP_HASH160"; |
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case OP_HASH256 : return "OP_HASH256"; |
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case OP_CODESEPARATOR : return "OP_CODESEPARATOR"; |
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case OP_CHECKSIG : return "OP_CHECKSIG"; |
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case OP_CHECKSIGVERIFY : return "OP_CHECKSIGVERIFY"; |
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case OP_CHECKMULTISIG : return "OP_CHECKMULTISIG"; |
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case OP_CHECKMULTISIGVERIFY : return "OP_CHECKMULTISIGVERIFY"; |
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// expanson
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case OP_NOP1 : return "OP_NOP1"; |
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case OP_NOP2 : return "OP_NOP2"; |
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case OP_NOP3 : return "OP_NOP3"; |
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case OP_NOP4 : return "OP_NOP4"; |
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case OP_NOP5 : return "OP_NOP5"; |
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case OP_NOP6 : return "OP_NOP6"; |
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case OP_NOP7 : return "OP_NOP7"; |
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case OP_NOP8 : return "OP_NOP8"; |
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case OP_NOP9 : return "OP_NOP9"; |
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case OP_NOP10 : return "OP_NOP10"; |
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case OP_INVALIDOPCODE : return "OP_INVALIDOPCODE"; |
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// Note:
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// The template matching params OP_SMALLDATA/etc are defined in opcodetype enum
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// as kind of implementation hack, they are *NOT* real opcodes. If found in real
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// Script, just let the default: case deal with them.
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default: |
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return "OP_UNKNOWN"; |
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} |
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} |
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unsigned int CScript::GetSigOpCount(bool fAccurate) const |
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{ |
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unsigned int n = 0; |
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const_iterator pc = begin(); |
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opcodetype lastOpcode = OP_INVALIDOPCODE; |
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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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{ |
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if (fAccurate && lastOpcode >= OP_1 && lastOpcode <= OP_16) |
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n += DecodeOP_N(lastOpcode); |
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else |
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n += 20; |
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} |
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lastOpcode = opcode; |
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} |
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return n; |
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} |
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unsigned int CScript::GetSigOpCount(const CScript& scriptSig) const |
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{ |
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if (!IsPayToScriptHash()) |
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return GetSigOpCount(true); |
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// This is a pay-to-script-hash scriptPubKey;
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// get the last item that the scriptSig
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// pushes onto the stack:
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const_iterator pc = scriptSig.begin(); |
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vector<unsigned char> data; |
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while (pc < scriptSig.end()) |
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{ |
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opcodetype opcode; |
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if (!scriptSig.GetOp(pc, opcode, data)) |
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return 0; |
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if (opcode > OP_16) |
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return 0; |
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} |
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/// ... and return its opcount:
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CScript subscript(data.begin(), data.end()); |
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return subscript.GetSigOpCount(true); |
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} |
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bool CScript::IsPayToScriptHash() const |
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{ |
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// Extra-fast test for pay-to-script-hash CScripts:
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return (this->size() == 23 && |
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this->at(0) == OP_HASH160 && |
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this->at(1) == 0x14 && |
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this->at(22) == OP_EQUAL); |
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} |
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bool CScript::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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// Note that IsPushOnly() *does* consider OP_RESERVED to be a
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// push-type opcode, however execution of OP_RESERVED fails, so
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// it's not relevant to P2SH as the scriptSig would fail prior to
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// the P2SH special validation code being executed.
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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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bool CScript::HasCanonicalPushes() 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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std::vector<unsigned char> data; |
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if (!GetOp(pc, opcode, data)) |
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return false; |
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if (opcode > OP_16) |
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continue; |
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if (opcode < OP_PUSHDATA1 && opcode > OP_0 && (data.size() == 1 && data[0] <= 16)) |
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// Could have used an OP_n code, rather than a 1-byte push.
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return false; |
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if (opcode == OP_PUSHDATA1 && data.size() < OP_PUSHDATA1) |
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// Could have used a normal n-byte push, rather than OP_PUSHDATA1.
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return false; |
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if (opcode == OP_PUSHDATA2 && data.size() <= 0xFF) |
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// Could have used an OP_PUSHDATA1.
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return false; |
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if (opcode == OP_PUSHDATA4 && data.size() <= 0xFFFF) |
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// Could have used an OP_PUSHDATA2.
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return false; |
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} |
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return true; |
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} |
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class CScriptVisitor : public boost::static_visitor<bool> |
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{ |
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private: |
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CScript *script; |
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public: |
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CScriptVisitor(CScript *scriptin) { script = scriptin; } |
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bool operator()(const CNoDestination &dest) const { |
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script->clear(); |
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return false; |
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} |
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bool operator()(const CKeyID &keyID) const { |
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script->clear(); |
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*script << OP_DUP << OP_HASH160 << keyID << OP_EQUALVERIFY << OP_CHECKSIG; |
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return true; |
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} |
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bool operator()(const CScriptID &scriptID) const { |
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script->clear(); |
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*script << OP_HASH160 << scriptID << OP_EQUAL; |
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return true; |
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} |
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}; |
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void CScript::SetDestination(const CTxDestination& dest) |
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{ |
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boost::apply_visitor(CScriptVisitor(this), dest); |
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} |
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void CScript::SetMultisig(int nRequired, const std::vector<CPubKey>& keys) |
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{ |
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this->clear(); |
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*this << EncodeOP_N(nRequired); |
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BOOST_FOREACH(const CPubKey& key, keys) |
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*this << key; |
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*this << EncodeOP_N(keys.size()) << OP_CHECKMULTISIG; |
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} |
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@ -0,0 +1,645 @@
@@ -0,0 +1,645 @@
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING 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 "key.h" |
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#include "tinyformat.h" |
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#include "utilstrencodings.h" |
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#include <stdexcept> |
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#include <boost/variant.hpp> |
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static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
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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_SMALLDATA = 0xf9, |
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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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class scriptnum_error : public std::runtime_error |
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{ |
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public: |
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explicit scriptnum_error(const std::string& str) : std::runtime_error(str) {} |
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}; |
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class CScriptNum |
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{ |
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// Numeric opcodes (OP_1ADD, etc) are restricted to operating on 4-byte integers.
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// The semantics are subtle, though: operands must be in the range [-2^31 +1...2^31 -1],
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// but results may overflow (and are valid as long as they are not used in a subsequent
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// numeric operation). CScriptNum enforces those semantics by storing results as
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// an int64 and allowing out-of-range values to be returned as a vector of bytes but
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// throwing an exception if arithmetic is done or the result is interpreted as an integer.
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public: |
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explicit CScriptNum(const int64_t& n) |
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{ |
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m_value = n; |
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} |
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explicit CScriptNum(const std::vector<unsigned char>& vch) |
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{ |
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if (vch.size() > nMaxNumSize) |
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throw scriptnum_error("CScriptNum(const std::vector<unsigned char>&) : overflow"); |
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m_value = set_vch(vch); |
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} |
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inline bool operator==(const int64_t& rhs) const { return m_value == rhs; } |
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inline bool operator!=(const int64_t& rhs) const { return m_value != rhs; } |
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inline bool operator<=(const int64_t& rhs) const { return m_value <= rhs; } |
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inline bool operator< (const int64_t& rhs) const { return m_value < rhs; } |
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inline bool operator>=(const int64_t& rhs) const { return m_value >= rhs; } |
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inline bool operator> (const int64_t& rhs) const { return m_value > rhs; } |
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inline bool operator==(const CScriptNum& rhs) const { return operator==(rhs.m_value); } |
||||
inline bool operator!=(const CScriptNum& rhs) const { return operator!=(rhs.m_value); } |
||||
inline bool operator<=(const CScriptNum& rhs) const { return operator<=(rhs.m_value); } |
||||
inline bool operator< (const CScriptNum& rhs) const { return operator< (rhs.m_value); } |
||||
inline bool operator>=(const CScriptNum& rhs) const { return operator>=(rhs.m_value); } |
||||
inline bool operator> (const CScriptNum& rhs) const { return operator> (rhs.m_value); } |
||||
|
||||
inline CScriptNum operator+( const int64_t& rhs) const { return CScriptNum(m_value + rhs);} |
||||
inline CScriptNum operator-( const int64_t& rhs) const { return CScriptNum(m_value - rhs);} |
||||
inline CScriptNum operator+( const CScriptNum& rhs) const { return operator+(rhs.m_value); } |
||||
inline CScriptNum operator-( const CScriptNum& rhs) const { return operator-(rhs.m_value); } |
||||
|
||||
inline CScriptNum& operator+=( const CScriptNum& rhs) { return operator+=(rhs.m_value); } |
||||
inline CScriptNum& operator-=( const CScriptNum& rhs) { return operator-=(rhs.m_value); } |
||||
|
||||
inline CScriptNum operator-() const |
||||
{ |
||||
assert(m_value != std::numeric_limits<int64_t>::min()); |
||||
return CScriptNum(-m_value); |
||||
} |
||||
|
||||
inline CScriptNum& operator=( const int64_t& rhs) |
||||
{ |
||||
m_value = rhs; |
||||
return *this; |
||||
} |
||||
|
||||
inline CScriptNum& operator+=( const int64_t& rhs) |
||||
{ |
||||
assert(rhs == 0 || (rhs > 0 && m_value <= std::numeric_limits<int64_t>::max() - rhs) || |
||||
(rhs < 0 && m_value >= std::numeric_limits<int64_t>::min() - rhs)); |
||||
m_value += rhs; |
||||
return *this; |
||||
} |
||||
|
||||
inline CScriptNum& operator-=( const int64_t& rhs) |
||||
{ |
||||
assert(rhs == 0 || (rhs > 0 && m_value >= std::numeric_limits<int64_t>::min() + rhs) || |
||||
(rhs < 0 && m_value <= std::numeric_limits<int64_t>::max() + rhs)); |
||||
m_value -= rhs; |
||||
return *this; |
||||
} |
||||
|
||||
int getint() const |
||||
{ |
||||
if (m_value > std::numeric_limits<int>::max()) |
||||
return std::numeric_limits<int>::max(); |
||||
else if (m_value < std::numeric_limits<int>::min()) |
||||
return std::numeric_limits<int>::min(); |
||||
return m_value; |
||||
} |
||||
|
||||
std::vector<unsigned char> getvch() const |
||||
{ |
||||
return serialize(m_value); |
||||
} |
||||
|
||||
static std::vector<unsigned char> serialize(const int64_t& value) |
||||
{ |
||||
if(value == 0) |
||||
return std::vector<unsigned char>(); |
||||
|
||||
std::vector<unsigned char> result; |
||||
const bool neg = value < 0; |
||||
uint64_t absvalue = neg ? -value : value; |
||||
|
||||
while(absvalue) |
||||
{ |
||||
result.push_back(absvalue & 0xff); |
||||
absvalue >>= 8; |
||||
} |
||||
|
||||
// - If the most significant byte is >= 0x80 and the value is positive, push a
|
||||
// new zero-byte to make the significant byte < 0x80 again.
|
||||
|
||||
// - If the most significant byte is >= 0x80 and the value is negative, push a
|
||||
// new 0x80 byte that will be popped off when converting to an integral.
|
||||
|
||||
// - If the most significant byte is < 0x80 and the value is negative, add
|
||||
// 0x80 to it, since it will be subtracted and interpreted as a negative when
|
||||
// converting to an integral.
|
||||
|
||||
if (result.back() & 0x80) |
||||
result.push_back(neg ? 0x80 : 0); |
||||
else if (neg) |
||||
result.back() |= 0x80; |
||||
|
||||
return result; |
||||
} |
||||
|
||||
static const size_t nMaxNumSize = 4; |
||||
|
||||
private: |
||||
static int64_t set_vch(const std::vector<unsigned char>& vch) |
||||
{ |
||||
if (vch.empty()) |
||||
return 0; |
||||
|
||||
int64_t result = 0; |
||||
for (size_t i = 0; i != vch.size(); ++i) |
||||
result |= static_cast<int64_t>(vch[i]) << 8*i; |
||||
|
||||
// If the input vector's most significant byte is 0x80, remove it from
|
||||
// the result's msb and return a negative.
|
||||
if (vch.back() & 0x80) |
||||
return -(result & ~(0x80ULL << (8 * (vch.size() - 1)))); |
||||
|
||||
return result; |
||||
} |
||||
|
||||
int64_t m_value; |
||||
}; |
||||
|
||||
inline std::string ValueString(const std::vector<unsigned char>& vch) |
||||
{ |
||||
if (vch.size() <= 4) |
||||
return strprintf("%d", CScriptNum(vch).getint()); |
||||
else |
||||
return HexStr(vch); |
||||
} |
||||
|
||||
class CNoDestination { |
||||
public: |
||||
friend bool operator==(const CNoDestination &a, const CNoDestination &b) { return true; } |
||||
friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; } |
||||
}; |
||||
|
||||
/** A txout script template with a specific destination. It is either:
|
||||
* * CNoDestination: no destination set |
||||
* * CKeyID: TX_PUBKEYHASH destination |
||||
* * CScriptID: TX_SCRIPTHASH destination |
||||
* A CTxDestination is the internal data type encoded in a CBitcoinAddress |
||||
*/ |
||||
typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination; |
||||
|
||||
/** Serialized script, used inside transaction inputs and outputs */ |
||||
class CScript : public std::vector<unsigned char> |
||||
{ |
||||
protected: |
||||
CScript& push_int64(int64_t n) |
||||
{ |
||||
if (n == -1 || (n >= 1 && n <= 16)) |
||||
{ |
||||
push_back(n + (OP_1 - 1)); |
||||
} |
||||
else |
||||
{ |
||||
*this << CScriptNum::serialize(n); |
||||
} |
||||
return *this; |
||||
} |
||||
public: |
||||
CScript() { } |
||||
CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { } |
||||
CScript(const_iterator pbegin, const_iterator pend) : std::vector<unsigned char>(pbegin, pend) { } |
||||
#ifndef _MSC_VER |
||||
CScript(const unsigned char* pbegin, const unsigned char* pend) : std::vector<unsigned char>(pbegin, pend) { } |
||||
#endif |
||||
|
||||
CScript& operator+=(const CScript& b) |
||||
{ |
||||
insert(end(), b.begin(), b.end()); |
||||
return *this; |
||||
} |
||||
|
||||
friend CScript operator+(const CScript& a, const CScript& b) |
||||
{ |
||||
CScript ret = a; |
||||
ret += b; |
||||
return ret; |
||||
} |
||||
|
||||
CScript(int64_t b) { operator<<(b); } |
||||
|
||||
explicit CScript(opcodetype b) { operator<<(b); } |
||||
explicit CScript(const uint256& b) { operator<<(b); } |
||||
explicit CScript(const CScriptNum& b) { operator<<(b); } |
||||
explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); } |
||||
|
||||
|
||||
CScript& operator<<(int64_t b) { return push_int64(b); } |
||||
|
||||
CScript& operator<<(opcodetype opcode) |
||||
{ |
||||
if (opcode < 0 || opcode > 0xff) |
||||
throw std::runtime_error("CScript::operator<<() : invalid opcode"); |
||||
insert(end(), (unsigned char)opcode); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const uint160& b) |
||||
{ |
||||
insert(end(), sizeof(b)); |
||||
insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b)); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const uint256& b) |
||||
{ |
||||
insert(end(), sizeof(b)); |
||||
insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b)); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const CPubKey& key) |
||||
{ |
||||
assert(key.size() < OP_PUSHDATA1); |
||||
insert(end(), (unsigned char)key.size()); |
||||
insert(end(), key.begin(), key.end()); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const CScriptNum& b) |
||||
{ |
||||
*this << b.getvch(); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const std::vector<unsigned char>& b) |
||||
{ |
||||
if (b.size() < OP_PUSHDATA1) |
||||
{ |
||||
insert(end(), (unsigned char)b.size()); |
||||
} |
||||
else if (b.size() <= 0xff) |
||||
{ |
||||
insert(end(), OP_PUSHDATA1); |
||||
insert(end(), (unsigned char)b.size()); |
||||
} |
||||
else if (b.size() <= 0xffff) |
||||
{ |
||||
insert(end(), OP_PUSHDATA2); |
||||
unsigned short nSize = b.size(); |
||||
insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize)); |
||||
} |
||||
else |
||||
{ |
||||
insert(end(), OP_PUSHDATA4); |
||||
unsigned int nSize = b.size(); |
||||
insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize)); |
||||
} |
||||
insert(end(), b.begin(), b.end()); |
||||
return *this; |
||||
} |
||||
|
||||
CScript& operator<<(const CScript& b) |
||||
{ |
||||
// I'm not sure if this should push the script or concatenate scripts.
|
||||
// If there's ever a use for pushing a script onto a script, delete this member fn
|
||||
assert(!"Warning: Pushing a CScript onto a CScript with << is probably not intended, use + to concatenate!"); |
||||
return *this; |
||||
} |
||||
|
||||
|
||||
bool GetOp(iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet) |
||||
{ |
||||
// Wrapper so it can be called with either iterator or const_iterator
|
||||
const_iterator pc2 = pc; |
||||
bool fRet = GetOp2(pc2, opcodeRet, &vchRet); |
||||
pc = begin() + (pc2 - begin()); |
||||
return fRet; |
||||
} |
||||
|
||||
bool GetOp(iterator& pc, opcodetype& opcodeRet) |
||||
{ |
||||
const_iterator pc2 = pc; |
||||
bool fRet = GetOp2(pc2, opcodeRet, NULL); |
||||
pc = begin() + (pc2 - begin()); |
||||
return fRet; |
||||
} |
||||
|
||||
bool GetOp(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet) const |
||||
{ |
||||
return GetOp2(pc, opcodeRet, &vchRet); |
||||
} |
||||
|
||||
bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const |
||||
{ |
||||
return GetOp2(pc, opcodeRet, NULL); |
||||
} |
||||
|
||||
bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet) const |
||||
{ |
||||
opcodeRet = OP_INVALIDOPCODE; |
||||
if (pvchRet) |
||||
pvchRet->clear(); |
||||
if (pc >= end()) |
||||
return false; |
||||
|
||||
// Read instruction
|
||||
if (end() - pc < 1) |
||||
return false; |
||||
unsigned int opcode = *pc++; |
||||
|
||||
// Immediate operand
|
||||
if (opcode <= OP_PUSHDATA4) |
||||
{ |
||||
unsigned int nSize = 0; |
||||
if (opcode < OP_PUSHDATA1) |
||||
{ |
||||
nSize = opcode; |
||||
} |
||||
else if (opcode == OP_PUSHDATA1) |
||||
{ |
||||
if (end() - pc < 1) |
||||
return false; |
||||
nSize = *pc++; |
||||
} |
||||
else if (opcode == OP_PUSHDATA2) |
||||
{ |
||||
if (end() - pc < 2) |
||||
return false; |
||||
nSize = 0; |
||||
memcpy(&nSize, &pc[0], 2); |
||||
pc += 2; |
||||
} |
||||
else if (opcode == OP_PUSHDATA4) |
||||
{ |
||||
if (end() - pc < 4) |
||||
return false; |
||||
memcpy(&nSize, &pc[0], 4); |
||||
pc += 4; |
||||
} |
||||
if (end() - pc < 0 || (unsigned int)(end() - pc) < nSize) |
||||
return false; |
||||
if (pvchRet) |
||||
pvchRet->assign(pc, pc + nSize); |
||||
pc += nSize; |
||||
} |
||||
|
||||
opcodeRet = (opcodetype)opcode; |
||||
return true; |
||||
} |
||||
|
||||
// Encode/decode small integers:
|
||||
static int DecodeOP_N(opcodetype opcode) |
||||
{ |
||||
if (opcode == OP_0) |
||||
return 0; |
||||
assert(opcode >= OP_1 && opcode <= OP_16); |
||||
return (int)opcode - (int)(OP_1 - 1); |
||||
} |
||||
static opcodetype EncodeOP_N(int n) |
||||
{ |
||||
assert(n >= 0 && n <= 16); |
||||
if (n == 0) |
||||
return OP_0; |
||||
return (opcodetype)(OP_1+n-1); |
||||
} |
||||
|
||||
int FindAndDelete(const CScript& b) |
||||
{ |
||||
int nFound = 0; |
||||
if (b.empty()) |
||||
return nFound; |
||||
iterator pc = begin(); |
||||
opcodetype opcode; |
||||
do |
||||
{ |
||||
while (end() - pc >= (long)b.size() && memcmp(&pc[0], &b[0], b.size()) == 0) |
||||
{ |
||||
erase(pc, pc + b.size()); |
||||
++nFound; |
||||
} |
||||
} |
||||
while (GetOp(pc, opcode)); |
||||
return nFound; |
||||
} |
||||
int Find(opcodetype op) const |
||||
{ |
||||
int nFound = 0; |
||||
opcodetype opcode; |
||||
for (const_iterator pc = begin(); pc != end() && GetOp(pc, opcode);) |
||||
if (opcode == op) |
||||
++nFound; |
||||
return nFound; |
||||
} |
||||
|
||||
// Pre-version-0.6, Bitcoin always counted CHECKMULTISIGs
|
||||
// as 20 sigops. With pay-to-script-hash, that changed:
|
||||
// CHECKMULTISIGs serialized in scriptSigs are
|
||||
// counted more accurately, assuming they are of the form
|
||||
// ... OP_N CHECKMULTISIG ...
|
||||
unsigned int GetSigOpCount(bool fAccurate) const; |
||||
|
||||
// Accurately count sigOps, including sigOps in
|
||||
// pay-to-script-hash transactions:
|
||||
unsigned int GetSigOpCount(const CScript& scriptSig) const; |
||||
|
||||
bool IsPayToScriptHash() const; |
||||
|
||||
// Called by IsStandardTx and P2SH VerifyScript (which makes it consensus-critical).
|
||||
bool IsPushOnly() const; |
||||
|
||||
// Called by IsStandardTx.
|
||||
bool HasCanonicalPushes() const; |
||||
|
||||
// Returns whether the script is guaranteed to fail at execution,
|
||||
// regardless of the initial stack. This allows outputs to be pruned
|
||||
// instantly when entering the UTXO set.
|
||||
bool IsUnspendable() const |
||||
{ |
||||
return (size() > 0 && *begin() == OP_RETURN); |
||||
} |
||||
|
||||
void SetDestination(const CTxDestination& address); |
||||
void SetMultisig(int nRequired, const std::vector<CPubKey>& keys); |
||||
|
||||
std::string ToString() const |
||||
{ |
||||
std::string str; |
||||
opcodetype opcode; |
||||
std::vector<unsigned char> vch; |
||||
const_iterator pc = begin(); |
||||
while (pc < end()) |
||||
{ |
||||
if (!str.empty()) |
||||
str += " "; |
||||
if (!GetOp(pc, opcode, vch)) |
||||
{ |
||||
str += "[error]"; |
||||
return str; |
||||
} |
||||
if (0 <= opcode && opcode <= OP_PUSHDATA4) |
||||
str += ValueString(vch); |
||||
else |
||||
str += GetOpName(opcode); |
||||
} |
||||
return str; |
||||
} |
||||
|
||||
CScriptID GetID() const |
||||
{ |
||||
return CScriptID(Hash160(*this)); |
||||
} |
||||
|
||||
void clear() |
||||
{ |
||||
// The default std::vector::clear() does not release memory.
|
||||
std::vector<unsigned char>().swap(*this); |
||||
} |
||||
}; |
||||
|
||||
#endif |
||||
Loading…
Reference in new issue