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