SealEngine.cpp

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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/>.
*/
#include "SealEngine.h"
#include "Transaction.h"
#include <libevm/ExtVMFace.h>
using namespace std;
using namespace dev;
using namespace eth;

SealEngineRegistrar* SealEngineRegistrar::s_this = nullptr;

void NoProof::init()
{
        ETH_REGISTER_SEAL_ENGINE(NoProof);
}

void SealEngineFace::verify(Strictness _s, BlockHeader const& _bi, BlockHeader const& _parent, bytesConstRef _block) const
{
        _bi.verify(_s, _parent, _block);
}

void SealEngineFace::populateFromParent(BlockHeader& _bi, BlockHeader const& _parent) const
{
        _bi.populateFromParent(_parent);
}

void SealEngineFace::verifyTransaction(ImportRequirements::value _ir, TransactionBase const& _t, BlockHeader const&) const
{
        if (_ir & ImportRequirements::TransactionSignatures)
                _t.checkLowS();
}

SealEngineFace* SealEngineRegistrar::create(ChainOperationParams const& _params)
{
        SealEngineFace* ret = create(_params.sealEngineName);
        assert(ret && "Seal engine not found.");
        if (ret)
                ret->setChainParams(_params);
        return ret;
}

EVMSchedule const& SealEngineBase::evmSchedule(EnvInfo const& _envInfo) const
{
        if (u256(0) == chainParams().u256Param("EIP158ForkBlock") && 
                u256(0) == chainParams().u256Param("EIP150ForkBlock") &&
                u256(0) == chainParams().u256Param("homsteadForkBlock")){
                        return getFascSchedule();
        }

        if (_envInfo.number() >= chainParams().u256Param("metropolisForkBlock"))
                return MetropolisSchedule;
        if (_envInfo.number() >= chainParams().u256Param("EIP158ForkBlock"))
                return EIP158Schedule;
        else if (_envInfo.number() >= chainParams().u256Param("EIP150ForkBlock"))
                return EIP150Schedule;
        else if (_envInfo.number() >= chainParams().u256Param("homsteadForkBlock"))
                return HomesteadSchedule;
        else
                return FrontierSchedule;
}