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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file NatspecHandler.cpp
* @author Lefteris Karapetsas <lefteris@ethdev.com>
* @date 2015
*/
#include "NatspecHandler.h"
#include <string>
#include <boost/filesystem.hpp>
#include <libdevcore/Common.h>
#include <libdevcore/CommonData.h>
#include <libdevcore/Exceptions.h>
#include <libdevcore/Log.h>
#include <libdevcrypto/SHA3.h>
#include <libethereum/Defaults.h>
using namespace dev;
using namespace dev::eth;
using namespace std;
NatspecHandler::NatspecHandler()
{
string path = Defaults::dbPath();
boost::filesystem::create_directories(path);
ldb::Options o;
o.create_if_missing = true;
ldb::DB::Open(o, path + "/natspec", &m_db);
}
NatspecHandler::~NatspecHandler()
{
delete m_db;
}
void NatspecHandler::add(dev::h256 const& _contractHash, string const& _doc)
{
bytes k = _contractHash.asBytes();
string v = _doc;
m_db->Put(m_writeOptions, ldb::Slice((char const*)k.data(), k.size()), ldb::Slice((char const*)v.data(), v.size()));
}
string NatspecHandler::retrieve(dev::h256 const& _contractHash) const
{
bytes k = _contractHash.asBytes();
string ret;
m_db->Get(m_readOptions, ldb::Slice((char const*)k.data(), k.size()), &ret);
return ret;
}
string NatspecHandler::getUserNotice(string const& json, dev::bytes const& _transactionData)
{
Json::Value natspec;
Json::Value userNotice;
string retStr;
m_reader.parse(json, natspec);
bytes transactionFunctionPart(_transactionData.begin(), _transactionData.begin() + 4);
FixedHash<4> transactionFunctionHash(transactionFunctionPart);
Json::Value methods = natspec["methods"];
10 years ago
for (Json::ValueIterator it = methods.begin(); it != methods.end(); ++it)
{
Json::Value keyValue = it.key();
if (!keyValue.isString())
BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("Illegal Natspec JSON detected"));
string functionSig = keyValue.asString();
FixedHash<4> functionHash(dev::sha3(functionSig));
if (functionHash == transactionFunctionHash)
{
Json::Value val = (*it)["notice"];
if (!val.isString())
BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("Illegal Natspec JSON detected"));
return val.asString();
}
}
// not found
return string();
}
string NatspecHandler::getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionData)
{
return getUserNotice(retrieve(_contractHash), _transactionData);
}