TxIndex::DB Class Reference

Access to the txindex database (indexes/txindex/) More...

Inheritance diagram for TxIndex::DB:

Collaboration diagram for TxIndex::DB:

Public Member Functions
	DB (size_t n_cache_size, bool f_memory=false, bool f_wipe=false)
bool	ReadTxPos (const uint256 &txid, CDiskTxPos &pos) const
	Read the disk location of the transaction data with the given hash. More...
bool	WriteTxs (const std::vector< std::pair< uint256, CDiskTxPos >> &v_pos)
	Write a batch of transaction positions to the DB. More...
bool	MigrateData (CBlockTreeDB &block_tree_db, const CBlockLocator &best_locator)
	Migrate txindex data from the block tree DB, where it may be for older nodes that have not been upgraded yet to the new database. More...
Public Member Functions inherited from BaseIndex::DB
	DB (const fs::path &path, size_t n_cache_size, bool f_memory=false, bool f_wipe=false, bool f_obfuscate=false)
bool	ReadBestBlock (CBlockLocator &locator) const
	Read block locator of the chain that the txindex is in sync with. More...
void	WriteBestBlock (CDBBatch &batch, const CBlockLocator &locator)
	Write block locator of the chain that the txindex is in sync with. More...
Public Member Functions inherited from CDBWrapper
	CDBWrapper (const fs::path &path, size_t nCacheSize, bool fMemory=false, bool fWipe=false, bool obfuscate=false)
	~CDBWrapper ()
	CDBWrapper (const CDBWrapper &)=delete
CDBWrapper &	operator= (const CDBWrapper &)=delete
template<typename K , typename V >
bool	Read (const K &key, V &value) const
template<typename K , typename V >
bool	Write (const K &key, const V &value, bool fSync=false)
template<typename K >
bool	Exists (const K &key) const
template<typename K >
bool	Erase (const K &key, bool fSync=false)
bool	WriteBatch (CDBBatch &batch, bool fSync=false)
size_t	DynamicMemoryUsage () const
bool	Flush ()
bool	Sync ()
CDBIterator *	NewIterator ()
bool	IsEmpty ()
	Return true if the database managed by this class contains no entries. More...
template<typename K >
size_t	EstimateSize (const K &key_begin, const K &key_end) const
template<typename K >
void	CompactRange (const K &key_begin, const K &key_end) const
	Compact a certain range of keys in the database. More...

Detailed Description

Access to the txindex database (indexes/txindex/)

The database stores a block locator of the chain the database is synced to so that the TxIndex can efficiently determine the point it last stopped at. A locator is used instead of a simple hash of the chain tip because blocks and block index entries may not be flushed to disk until after this database is updated.

Definition at line 52 of file txindex.cpp.

Constructor & Destructor Documentation

DB()

TxIndex::DB::DB ( size_t  n_cache_size, bool  f_memory = false, bool  f_wipe = false  )

explicit

Definition at line 69 of file txindex.cpp.

Member Function Documentation

MigrateData()

bool TxIndex::DB::MigrateData	(	CBlockTreeDB &	block_tree_db,
		const CBlockLocator &	best_locator
	)

Migrate txindex data from the block tree DB, where it may be for older nodes that have not been upgraded yet to the new database.

Definition at line 105 of file txindex.cpp.

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ReadTxPos()

bool TxIndex::DB::ReadTxPos	(	const uint256 &	txid,
		CDiskTxPos &	pos
	)		const

Read the disk location of the transaction data with the given hash.

Returns false if the transaction hash is not indexed.

Definition at line 73 of file txindex.cpp.

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WriteTxs()

bool TxIndex::DB::WriteTxs

(

const std::vector< std::pair< uint256, CDiskTxPos >> &

v_pos

)

Write a batch of transaction positions to the DB.

Definition at line 78 of file txindex.cpp.

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The documentation for this class was generated from the following file:

• src/index/txindex.cpp