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118 lines
4.4 KiB
118 lines
4.4 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_TXDB_H
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#define BITCOIN_TXDB_H
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#include <coins.h>
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#include <dbwrapper.h>
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#include <chain.h>
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#include <mw/node/CoinsView.h>
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#include <primitives/block.h>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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class CBlockIndex;
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class CCoinsViewDBCursor;
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class uint256;
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//! -dbcache default (MiB)
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static const int64_t nDefaultDbCache = 450;
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//! -dbbatchsize default (bytes)
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static const int64_t nDefaultDbBatchSize = 16 << 20;
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//! max. -dbcache (MiB)
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static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
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//! min. -dbcache (MiB)
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static const int64_t nMinDbCache = 4;
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//! Max memory allocated to block tree DB specific cache, if no -txindex (MiB)
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static const int64_t nMaxBlockDBCache = 2;
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//! Max memory allocated to block tree DB specific cache, if -txindex (MiB)
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// Unlike for the UTXO database, for the txindex scenario the leveldb cache make
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// a meaningful difference: https://github.com/bitcoin/bitcoin/pull/8273#issuecomment-229601991
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static const int64_t nMaxTxIndexCache = 1024;
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//! Max memory allocated to all block filter index caches combined in MiB.
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static const int64_t max_filter_index_cache = 1024;
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//! Max memory allocated to coin DB specific cache (MiB)
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static const int64_t nMaxCoinsDBCache = 8;
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// Actually declared in validation.cpp; can't include because of circular dependency.
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extern RecursiveMutex cs_main;
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/** CCoinsView backed by the coin database (chainstate/) */
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class CCoinsViewDB final : public CCoinsView
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{
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protected:
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std::unique_ptr<CDBWrapper> m_db;
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mw::ICoinsView::Ptr mweb_view;
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fs::path m_ldb_path;
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bool m_is_memory;
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public:
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/**
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* @param[in] ldb_path Location in the filesystem where leveldb data will be stored.
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*/
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explicit CCoinsViewDB(fs::path ldb_path, size_t nCacheSize, bool fMemory, bool fWipe);
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bool GetCoin(const COutPoint &outpoint, Coin &coin) const override;
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bool HaveCoin(const OutputIndex& index) const override;
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uint256 GetBestBlock() const override;
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std::vector<uint256> GetHeadBlocks() const override;
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bool BatchWrite(CCoinsMap& mapCoins, const uint256& hashBlock, const mw::CoinsViewCache::Ptr& derivedView) override;
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CCoinsViewCursor *Cursor() const override;
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CDBWrapper* GetDB() noexcept { return m_db.get(); }
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void SetMWEBView(const mw::ICoinsView::Ptr& view) { mweb_view = view; }
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mw::ICoinsView::Ptr GetMWEBView() const final { return mweb_view; }
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bool GetMWEBCoin(const mw::Hash& output_id, Output& coin) const final;
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//! Attempt to update from an older database format. Returns whether an error occurred.
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bool Upgrade();
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size_t EstimateSize() const override;
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//! Dynamically alter the underlying leveldb cache size.
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void ResizeCache(size_t new_cache_size) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
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};
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/** Specialization of CCoinsViewCursor to iterate over a CCoinsViewDB */
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class CCoinsViewDBCursor: public CCoinsViewCursor
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{
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public:
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~CCoinsViewDBCursor() {}
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bool GetKey(COutPoint &key) const override;
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bool GetValue(Coin &coin) const override;
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unsigned int GetValueSize() const override;
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bool Valid() const override;
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void Next() override;
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private:
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CCoinsViewDBCursor(CDBIterator* pcursorIn, const uint256 &hashBlockIn):
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CCoinsViewCursor(hashBlockIn), pcursor(pcursorIn) {}
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std::unique_ptr<CDBIterator> pcursor;
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std::pair<char, COutPoint> keyTmp;
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friend class CCoinsViewDB;
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};
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/** Access to the block database (blocks/index/) */
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class CBlockTreeDB : public CDBWrapper
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{
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public:
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explicit CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
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bool WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo);
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bool ReadBlockFileInfo(int nFile, CBlockFileInfo &info);
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bool ReadLastBlockFile(int &nFile);
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bool WriteReindexing(bool fReindexing);
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void ReadReindexing(bool &fReindexing);
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bool WriteFlag(const std::string &name, bool fValue);
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bool ReadFlag(const std::string &name, bool &fValue);
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bool LoadBlockIndexGuts(const Consensus::Params& consensusParams, std::function<CBlockIndex*(const uint256&)> insertBlockIndex);
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};
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#endif // BITCOIN_TXDB_H
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