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101 lines
2.8 KiB
101 lines
2.8 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file NatspecHandler.cpp
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* @author Lefteris Karapetsas <lefteris@ethdev.com>
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* @date 2015
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*/
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#include "NatspecHandler.h"
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#include <string>
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#include <boost/filesystem.hpp>
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#include <libdevcore/Common.h>
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#include <libdevcore/CommonData.h>
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#include <libdevcore/Exceptions.h>
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#include <libdevcore/Log.h>
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#include <libdevcore/SHA3.h>
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#include <libethereum/Defaults.h>
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using namespace dev;
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using namespace dev::eth;
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using namespace std;
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NatspecHandler::NatspecHandler()
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{
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string path = Defaults::dbPath();
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boost::filesystem::create_directories(path);
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ldb::Options o;
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o.create_if_missing = true;
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ldb::DB::Open(o, path + "/natspec", &m_db);
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}
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NatspecHandler::~NatspecHandler()
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{
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delete m_db;
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}
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void NatspecHandler::add(dev::h256 const& _contractHash, string const& _doc)
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{
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m_db->Put(m_writeOptions, _contractHash.ref(), _doc);
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cdebug << "Registering NatSpec: " << _contractHash << _doc;
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}
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string NatspecHandler::retrieve(dev::h256 const& _contractHash) const
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{
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string ret;
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m_db->Get(m_readOptions, _contractHash.ref(), &ret);
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cdebug << "Looking up NatSpec: " << _contractHash << ret;
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return ret;
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}
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string NatspecHandler::getUserNotice(string const& json, dev::bytes const& _transactionData)
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{
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Json::Value natspec;
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Json::Value userNotice;
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m_reader.parse(json, natspec);
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FixedHash<4> transactionFunctionHash((bytesConstRef(&_transactionData).cropped(0, 4).toBytes()));
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Json::Value methods = natspec["methods"];
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for (Json::ValueIterator it = methods.begin(); it != methods.end(); ++it)
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{
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Json::Value keyValue = it.key();
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if (!keyValue.isString())
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BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("Illegal Natspec JSON detected"));
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string functionSig = keyValue.asString();
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FixedHash<4> functionHash(dev::sha3(functionSig));
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if (functionHash == transactionFunctionHash)
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{
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Json::Value val = (*it)["notice"];
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if (!val.isString())
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BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("Illegal Natspec JSON detected"));
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return val.asString();
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}
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}
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// not found
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return string();
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}
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string NatspecHandler::getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionData)
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{
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return getUserNotice(retrieve(_contractHash), _transactionData);
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}
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