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82 lines
2.1 KiB
82 lines
2.1 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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Foobar 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file BlockChain.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include "Common.h"
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namespace eth
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{
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class MappedBlock
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{
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public:
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MappedBlock() {}
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MappedBlock(u256 _hash) {} // TODO: map memory from disk.
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~MappedBlock() {} // TODO: unmap memory from disk
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bytesConstRef data() const { return bytesConstRef(); }
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private:
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// TODO: memory mapping.
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};
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/**
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* @brief Implements the blockchain database. All data this gives is disk-backed.
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*/
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class BlockChain
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{
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public:
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BlockChain();
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~BlockChain();
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/// (Potentiall) renders invalid existing bytesConstRef returned by lastBlock.
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/// To be called from main loop every 100ms or so.
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void process();
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/// Import block into disk-backed DB
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void import(bytes const& _block);
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/// Get the last block of the longest chain.
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bytesConstRef lastBlock() const; // TODO: switch to return MappedBlock or add the lock into vector_ref
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/// Get the number of the last block of the longest chain.
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u256 lastBlockNumber() const;
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bytesConstRef block(u256 _hash) const;
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private:
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/// Get fully populated from disk DB.
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mutable std::map<u256, std::pair<u256, u256>> m_numberAndParent;
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mutable std::multimap<u256, u256> m_children;
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/// Gets populated on demand. Inactive nodes are pruned after a while.
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mutable std::map<u256, std::shared_ptr<MappedBlock>> m_cache;
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/// Hash of the last (valid) block on the longest chain.
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u256 m_lastBlockHash;
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u256 m_genesisHash;
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bytes m_genesisBlock;
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};
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}
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