LCOV - code coverage report
Current view: top level - src/index - txindex.h (source / functions) Coverage Total Hit
Test: test_bitcoin_coverage.info Lines: 100.0 % 1 1
Test Date: 2024-11-04 04:45:35 Functions: 100.0 % 1 1
Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2017-2022 The Bitcoin Core developers
       2                 :             : // Distributed under the MIT software license, see the accompanying
       3                 :             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4                 :             : 
       5                 :             : #ifndef BITCOIN_INDEX_TXINDEX_H
       6                 :             : #define BITCOIN_INDEX_TXINDEX_H
       7                 :             : 
       8                 :             : #include <index/base.h>
       9                 :             : 
      10                 :             : static constexpr bool DEFAULT_TXINDEX{false};
      11                 :             : 
      12                 :             : /**
      13                 :             :  * TxIndex is used to look up transactions included in the blockchain by hash.
      14                 :             :  * The index is written to a LevelDB database and records the filesystem
      15                 :             :  * location of each transaction by transaction hash.
      16                 :             :  */
      17                 :             : class TxIndex final : public BaseIndex
      18                 :             : {
      19                 :             : protected:
      20                 :             :     class DB;
      21                 :             : 
      22                 :             : private:
      23                 :             :     const std::unique_ptr<DB> m_db;
      24                 :             : 
      25                 :          13 :     bool AllowPrune() const override { return false; }
      26                 :             : 
      27                 :             : protected:
      28                 :             :     bool CustomAppend(const interfaces::BlockInfo& block) override;
      29                 :             : 
      30                 :             :     BaseIndex::DB& GetDB() const override;
      31                 :             : 
      32                 :             : public:
      33                 :             :     /// Constructs the index, which becomes available to be queried.
      34                 :             :     explicit TxIndex(std::unique_ptr<interfaces::Chain> chain, size_t n_cache_size, bool f_memory = false, bool f_wipe = false);
      35                 :             : 
      36                 :             :     // Destructor is declared because this class contains a unique_ptr to an incomplete type.
      37                 :             :     virtual ~TxIndex() override;
      38                 :             : 
      39                 :             :     /// Look up a transaction by hash.
      40                 :             :     ///
      41                 :             :     /// @param[in]   tx_hash  The hash of the transaction to be returned.
      42                 :             :     /// @param[out]  block_hash  The hash of the block the transaction is found in.
      43                 :             :     /// @param[out]  tx  The transaction itself.
      44                 :             :     /// @return  true if transaction is found, false otherwise
      45                 :             :     bool FindTx(const uint256& tx_hash, uint256& block_hash, CTransactionRef& tx) const;
      46                 :             : };
      47                 :             : 
      48                 :             : /// The global transaction index, used in GetTransaction. May be null.
      49                 :             : extern std::unique_ptr<TxIndex> g_txindex;
      50                 :             : 
      51                 :             : #endif // BITCOIN_INDEX_TXINDEX_H
        

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