118 lines
5.4 KiB
C++
118 lines
5.4 KiB
C++
/*
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* This file is part of the Flowee project
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// Copyright (c) 2009-2015 The Bitcoin Core developers
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* Copyright (C) 2017 Tom Zander <tom@flowee.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "core_io.h"
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#include <primitives/transaction.h>
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#include <primitives/script.h>
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#include "script/standard.h"
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#include "serialize.h"
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#include "streaming/streams.h"
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#include <univalue.h>
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#include "util.h"
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#include "utilmoneystr.h"
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#include "utilstrencodings.h"
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#include <BitcoinVersion.h>
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#include <boost/assign/list_of.hpp>
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#include <boost/foreach.hpp>
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const std::map<unsigned char, std::string> mapSigHashTypes =
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boost::assign::map_list_of
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(static_cast<unsigned char>(SIGHASH_ALL), std::string("ALL"))
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(static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_ANYONECANPAY), std::string("ALL|ANYONECANPAY"))
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(static_cast<unsigned char>(SIGHASH_NONE), std::string("NONE"))
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(static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_ANYONECANPAY), std::string("NONE|ANYONECANPAY"))
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(static_cast<unsigned char>(SIGHASH_SINGLE), std::string("SINGLE"))
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(static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY), std::string("SINGLE|ANYONECANPAY"))
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(static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_UTXOS), std::string("ALL|UTXOS"))
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(static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_UTXOS), std::string("NONE|UTXOS"))
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(static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_UTXOS), std::string("SINGLE|UTXOS"))
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;
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/**
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* Create the assembly string representation of a CScript object.
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* @param[in] script CScript object to convert into the asm string representation.
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* @param[in] fAttemptSighashDecode Whether to attempt to decode sighash types on data within the script that matches the format
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* of a signature. Only pass true for scripts you believe could contain signatures. For example,
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* pass false, or omit the this argument (defaults to false), for scriptPubKeys.
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*/
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std::string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDecode)
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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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CScript::const_iterator pc = script.begin();
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while (pc < script.end()) {
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if (!str.empty()) {
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str += " ";
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}
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if (!script.GetOp(pc, opcode, vch)) {
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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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if (vch.size() <= static_cast<std::vector<unsigned char>::size_type>(4)) {
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str += strprintf("%d", CScriptNum(vch, false).getint());
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} else {
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// the IsUnspendable check makes sure not to try to decode OP_RETURN data that may match the format of a signature
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if (fAttemptSighashDecode && !script.IsUnspendable()) {
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std::string strSigHashDecode;
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// goal: only attempt to decode a defined sighash type from data that looks like a signature within a scriptSig.
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// this won't decode correctly formatted public keys in Pubkey or Multisig scripts due to
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// the restrictions on the pubkey formats (see IsCompressedOrUncompressedPubKey) being incongruous with the
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// checks in CheckSignatureEncoding.
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uint32_t flags = SCRIPT_VERIFY_STRICTENC;
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if (vch.back() & SIGHASH_FORKID) {
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// If the transaction is using SIGHASH_FORKID, we need
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// to set the apropriate flag.
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// TODO: Remove after the Hard Fork.
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flags |= SCRIPT_ENABLE_SIGHASH_FORKID;
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}
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if (vch.back() & SIGHASH_UTXOS)
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flags |= SCRIPT_ENABLE_SIGHASH_UTXOS;
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Script::State state(flags);
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if (Script::checkTransactionSignatureEncoding(vch, state)) {
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const uint8_t chSigHashType = vch.back() & 0xBF;
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if (mapSigHashTypes.count(chSigHashType)) {
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const bool forkIdSet = (vch.back() & SIGHASH_FORKID) == SIGHASH_FORKID;
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strSigHashDecode = "[" + mapSigHashTypes.find(chSigHashType)->second
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+ (forkIdSet ? "|FORKID]" : "]");
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vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
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}
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}
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str += HexStr(vch) + strSigHashDecode;
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} else {
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str += HexStr(vch);
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}
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}
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} else {
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str += GetOpName(opcode);
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}
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}
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return str;
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}
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std::string EncodeHexTx(const CTransaction& tx)
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{
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CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
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ssTx << tx;
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return HexStr(ssTx.begin(), ssTx.end());
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}
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