CCoinsViewDB Class Reference

#include <txdb.h>

Inheritance diagram for CCoinsViewDB:

Public Member Functions
	CCoinsViewDB (size_t nCacheSize, bool fMemory=false, bool fWipe=false)
bool	GetCoin (const COutPoint &outpoint, Coin &coin) const override
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
bool	BatchWrite (CCoinsMap &mapCoins, const uint256 &hashBlock) override
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...
Public Member Functions inherited from CCoinsView
virtual	~CCoinsView ()
	As we use CCoinsViews polymorphically, have a virtual destructor. More...

Protected Attributes
CDBWrapper	db

Detailed Description

CCoinsView backed by the coin database (chainstate/)

Constructor & Destructor Documentation

CCoinsViewDB()

CCoinsViewDB::CCoinsViewDB ( size_t  nCacheSize, bool  fMemory = false, bool  fWipe = false  )

explicit

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.

Cursor()

CCoinsViewCursor * CCoinsViewDB::Cursor ( ) const

overridevirtual

Get a cursor to iterate over the whole state.

Reimplemented from CCoinsView.

EstimateSize()

size_t CCoinsViewDB::EstimateSize ( ) const

overridevirtual

Estimate database size (0 if not implemented)

Reimplemented from CCoinsView.

GetBestBlock()

uint256 CCoinsViewDB::GetBestBlock ( ) const

overridevirtual

Retrieve the block hash whose state this CCoinsView currently represents.

Reimplemented from CCoinsView.

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.

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.

HaveCoin()

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

overridevirtual

Just check whether a given outpoint is unspent.

Reimplemented from CCoinsView.

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.

Member Data Documentation

db

CDBWrapper CCoinsViewDB::db

protected

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

• src/txdb.h
• src/txdb.cpp