CCoinsView backed by the coin database (chainstate/) More...

#include <txdb.h>

Inheritance diagram for CCoinsViewDB:

Collaboration diagram for CCoinsViewDB:

Public Member Functions
	CCoinsViewDB (fs::path ldb_path, size_t nCacheSize, bool fMemory, bool fWipe)

bool	GetCoin (const COutPoint &outpoint, Coin &coin) const override
	Retrieve the Coin (unspent transaction output) for a given outpoint. More...

bool	HaveCoin (const COutPoint &outpoint) const override
	Just check whether a given outpoint is unspent. More...

uint256	GetBestBlock () const override
	Retrieve the block hash whose state this CCoinsView currently represents. More...

std::vector< uint256 >	GetHeadBlocks () const override
	Retrieve the range of blocks that may have been only partially written. More...

bool	BatchWrite (CCoinsMap &mapCoins, const uint256 &hashBlock) override
	Do a bulk modification (multiple Coin changes + BestBlock change). More...

std::unique_ptr< CCoinsViewCursor >	Cursor () const override
	Get a cursor to iterate over the whole state. More...

bool	Upgrade ()
	Attempt to update from an older database format. Returns whether an error occurred. More...

size_t	EstimateSize () const override
	Estimate database size (0 if not implemented) More...

void	ResizeCache (size_t new_cache_size) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Dynamically alter the underlying leveldb cache size. More...

Public Member Functions inherited from CCoinsView
virtual	~CCoinsView ()
	As we use CCoinsViews polymorphically, have a virtual destructor. More...

Protected Attributes
std::unique_ptr< CDBWrapper >	m_db

fs::path	m_ldb_path

bool	m_is_memory

Detailed Description

CCoinsView backed by the coin database (chainstate/)

Definition at line 49 of file txdb.h.

Constructor & Destructor Documentation

◆ CCoinsViewDB()

CCoinsViewDB::CCoinsViewDB	(	fs::path	ldb_path,
		size_t	nCacheSize,
		bool	fMemory,
		bool	fWipe
	)

explicit

Parameters

[in] ldb_path Location in the filesystem where leveldb data will be stored.

Definition at line 65 of file txdb.cpp.

Member Function Documentation

◆ BatchWrite()

bool CCoinsViewDB::BatchWrite	(	CCoinsMap &	mapCoins,
		const uint256 &	hashBlock
	)

overridevirtual

Do a bulk modification (multiple Coin changes + BestBlock change).

The passed mapCoins can be modified.

Reimplemented from CCoinsView.

Definition at line 106 of file txdb.cpp.

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◆ Cursor()

std::unique_ptr< CCoinsViewCursor > CCoinsViewDB::Cursor ( ) const

overridevirtual

Get a cursor to iterate over the whole state.

Reimplemented from CCoinsView.

Definition at line 218 of file txdb.cpp.

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◆ EstimateSize()

size_t CCoinsViewDB::EstimateSize ( ) const

overridevirtual

Estimate database size (0 if not implemented)

Reimplemented from CCoinsView.

Definition at line 167 of file txdb.cpp.

◆ GetBestBlock()

uint256 CCoinsViewDB::GetBestBlock ( ) const

overridevirtual

Retrieve the block hash whose state this CCoinsView currently represents.

Reimplemented from CCoinsView.

Definition at line 91 of file txdb.cpp.

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◆ GetCoin()

bool CCoinsViewDB::GetCoin	(	const COutPoint &	outpoint,
		Coin &	coin
	)		const

overridevirtual

Retrieve the Coin (unspent transaction output) for a given outpoint.

Returns true only when an unspent coin was found, which is returned in coin. When false is returned, coin's value is unspecified.

Reimplemented from CCoinsView.

Definition at line 83 of file txdb.cpp.

◆ GetHeadBlocks()

std::vector< uint256 > CCoinsViewDB::GetHeadBlocks ( ) const

overridevirtual

Retrieve the range of blocks that may have been only partially written.

If the database is in a consistent state, the result is the empty vector. Otherwise, a two-element vector is returned consisting of the new and the old block hash, in that order.

Reimplemented from CCoinsView.

Definition at line 98 of file txdb.cpp.

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◆ HaveCoin()

bool CCoinsViewDB::HaveCoin ( const COutPoint & outpoint ) const

overridevirtual

Just check whether a given outpoint is unspent.

Reimplemented from CCoinsView.

Definition at line 87 of file txdb.cpp.

◆ ResizeCache()

void CCoinsViewDB::ResizeCache ( size_t new_cache_size )

Dynamically alter the underlying leveldb cache size.

Definition at line 70 of file txdb.cpp.

◆ Upgrade()

bool CCoinsViewDB::Upgrade ( )

Attempt to update from an older database format. Returns whether an error occurred.

Upgrade the database from older formats.

Currently implemented: from the per-tx utxo model (0.8..0.14.x) to per-txout.

Definition at line 399 of file txdb.cpp.

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Member Data Documentation

◆ m_db

std::unique_ptr<CDBWrapper> CCoinsViewDB::m_db

protected

Definition at line 52 of file txdb.h.

◆ m_is_memory

bool CCoinsViewDB::m_is_memory

protected

Definition at line 54 of file txdb.h.

◆ m_ldb_path

fs::path CCoinsViewDB::m_ldb_path

protected

Definition at line 53 of file txdb.h.

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

src/txdb.h
src/txdb.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ CCoinsViewDB()

Member Function Documentation

◆ BatchWrite()

◆ Cursor()

◆ EstimateSize()

◆ GetBestBlock()

◆ GetCoin()

◆ GetHeadBlocks()

◆ HaveCoin()

◆ ResizeCache()

◆ Upgrade()

Member Data Documentation

◆ m_db

◆ m_is_memory

◆ m_ldb_path