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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 BasicAuthority.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#include <libdevcore/CommonJS.h>
#include "Exceptions.h"
#include "BasicAuthority.h"
#include "BlockInfo.h"
using namespace std;
using namespace dev;
using namespace eth;
AddressHash BasicAuthority::s_authorities;
bool BasicAuthority::BlockHeaderRaw::verify() const
{
return s_authorities.count(toAddress(recover(m_sig, hashWithout())));
}
bool BasicAuthority::BlockHeaderRaw::preVerify() const
{
return SignatureStruct(m_sig).isValid();
}
void BasicAuthority::BlockHeaderRaw::populateFromHeader(RLP const& _header, Strictness _s)
{
m_sig = _header[BlockInfo::BasicFields].toHash<Signature>();
// check it hashes according to proof of work or that it's the genesis block.
if (_s == CheckEverything && m_parentHash && !verify())
{
InvalidBlockNonce ex;
ex << errinfo_hash256(hashWithout());
ex << errinfo_difficulty(m_difficulty);
ex << errinfo_target(boundary());
BOOST_THROW_EXCEPTION(ex);
}
else if (_s == QuickNonce && m_parentHash && !preVerify())
{
InvalidBlockNonce ex;
ex << errinfo_hash256(hashWithout());
ex << errinfo_difficulty(m_difficulty);
BOOST_THROW_EXCEPTION(ex);
}
}
void BasicAuthority::BlockHeaderRaw::verifyParent(BlockHeaderRaw const& _parent)
{
(void)_parent;
}
void BasicAuthority::BlockHeaderRaw::populateFromParent(BlockHeaderRaw const& _parent)
{
(void)_parent;
}
StringHashMap BasicAuthority::BlockHeaderRaw::jsInfo() const
{
return { { "sig", toJS(m_sig) } };
}
class BasicAuthoritySealEngine: public SealEngineBase<BasicAuthority>
{
public:
void setSecret(Secret const& _s) { m_secret = _s; }
void generateSeal(BlockInfo const& _bi)
{
BasicAuthority::BlockHeader h(_bi);
h.m_sig = sign(m_secret, _bi.hashWithout());
RLPStream ret;
h.streamRLP(ret);
m_onSealGenerated(ret.out());
}
void onSealGenerated(std::function<void(bytes const&)> const& _f) { m_onSealGenerated = _f; }
bool isWorking() const { return false; }
WorkingProgress workingProgress() const { return WorkingProgress(); }
private:
virtual bool onOptionChanging(std::string const& _name, bytes const& _value)
{
RLP rlp(_value);
if (_name == "authorities")
BasicAuthority::s_authorities = rlp.toUnorderedSet<Address>();
else if (_name == "authority")
m_secret = Secret(rlp.toHash<h256>());
else
return false;
return true;
}
Secret m_secret;
std::function<void(bytes const& s)> m_onSealGenerated;
};
SealEngineFace* BasicAuthority::createSealEngine()
{
return new BasicAuthoritySealEngine;
}