CCoinsViewDB Class Reference

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

#include <txdb.h>

Inheritance diagram for CCoinsViewDB:

Collaboration diagram for CCoinsViewDB:

Public Member Functions
	CCoinsViewDB (DBParams db_params, CoinsViewOptions options)
bool	GetCoin (const COutPoint &outpoint, Coin &coin) const override
	Retrieve the Coin (unspent transaction output) for a given outpoint.
bool	HaveCoin (const COutPoint &outpoint) const override
	Just check whether a given outpoint is unspent.
BlockHash	GetBestBlock () const override
	Retrieve the block hash whose state this CCoinsView currently represents.
std::vector< BlockHash >	GetHeadBlocks () const override
	Retrieve the range of blocks that may have been only partially written.
bool	BatchWrite (CCoinsMap &mapCoins, const BlockHash &hashBlock, bool erase=true) override
	Do a bulk modification (multiple Coin changes + BestBlock change).
CCoinsViewCursor *	Cursor () const override
	Get a cursor to iterate over the whole state.
bool	Upgrade ()
	Attempt to update from an older database format.
size_t	EstimateSize () const override
	Estimate database size (0 if not implemented)
void	ResizeCache (size_t new_cache_size) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Dynamically alter the underlying leveldb cache size.
std::optional< fs::path >	StoragePath ()
Public Member Functions inherited from CCoinsView
virtual	~CCoinsView ()
	As we use CCoinsViews polymorphically, have a virtual destructor.

Protected Attributes
DBParams	m_db_params
CoinsViewOptions	m_options
std::unique_ptr< CDBWrapper >	m_db

Detailed Description

CCoinsView backed by the coin database (chainstate/)

Definition at line 65 of file txdb.h.

Constructor & Destructor Documentation

CCoinsViewDB()

CCoinsViewDB::CCoinsViewDB ( DBParams  db_params, CoinsViewOptions  options  )

explicit

Definition at line 78 of file txdb.cpp.

Member Function Documentation

BatchWrite()

bool CCoinsViewDB::BatchWrite ( CCoinsMap &  mapCoins, const BlockHash &  hashBlock, bool  erase = true  )

overridevirtual

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

The passed mapCoins can be modified.

Reimplemented from CCoinsView.

Definition at line 119 of file txdb.cpp.

Here is the call graph for this function:

Cursor()

CCoinsViewCursor * CCoinsViewDB::Cursor ( ) const

overridevirtual

Get a cursor to iterate over the whole state.

It seems that there are no "const iterators" for LevelDB. Since we only need read operations on it, use a const-cast to get around that restriction.

Reimplemented from CCoinsView.

Definition at line 208 of file txdb.cpp.

Here is the call graph for this function:

EstimateSize()

size_t CCoinsViewDB::EstimateSize ( ) const

overridevirtual

Estimate database size (0 if not implemented)

Reimplemented from CCoinsView.

Definition at line 184 of file txdb.cpp.

Here is the call graph for this function:

GetBestBlock()

BlockHash CCoinsViewDB::GetBestBlock ( ) const

overridevirtual

Retrieve the block hash whose state this CCoinsView currently represents.

Reimplemented from CCoinsView.

Definition at line 103 of file txdb.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

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 95 of file txdb.cpp.

GetHeadBlocks()

std::vector< BlockHash > 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 111 of file txdb.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

HaveCoin()

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

overridevirtual

Just check whether a given outpoint is unspent.

Reimplemented from CCoinsView.

Definition at line 99 of file txdb.cpp.

ResizeCache()

void CCoinsViewDB::ResizeCache

(

size_t

new_cache_size

)

Dynamically alter the underlying leveldb cache size.

Definition at line 82 of file txdb.cpp.

Here is the call graph for this function:

StoragePath()

std::optional< fs::path > CCoinsViewDB::StoragePath ( )

inline

Returns

filesystem path to on-disk storage or std::nullopt if in memory.

Definition at line 92 of file txdb.h.

Upgrade()

bool CCoinsViewDB::Upgrade

(

)

Attempt to update from an older database format.

Upgrade the database from older formats.

Returns whether an error occurred.

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

Definition at line 416 of file txdb.cpp.

Here is the call graph for this function:

Member Data Documentation

m_db

std::unique_ptr<CDBWrapper> CCoinsViewDB::m_db

protected

Definition at line 69 of file txdb.h.

m_db_params

DBParams CCoinsViewDB::m_db_params

protected

Definition at line 67 of file txdb.h.

m_options

CoinsViewOptions CCoinsViewDB::m_options

protected

Definition at line 68 of file txdb.h.

---

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

• src/txdb.h
• src/txdb.cpp