git / moonbite-core / src/txdb.h · raw

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