CoinsViewEmpty Class Reference

Noop coins view. More...

#include <coins.h>

Inheritance diagram for CoinsViewEmpty:

Collaboration diagram for CoinsViewEmpty:

Public Member Functions
	CoinsViewEmpty (const CoinsViewEmpty &)=delete
CoinsViewEmpty &	operator= (const CoinsViewEmpty &)=delete
std::optional< Coin >	GetCoin (const COutPoint &) const override
	Retrieve the Coin (unspent transaction output) for a given outpoint. More...
std::optional< Coin >	PeekCoin (const COutPoint &outpoint) const override
	Retrieve the Coin (unspent transaction output) for a given outpoint, without caching results. 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...
void	BatchWrite (CoinsViewCacheCursor &cursor, const uint256 &) 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. Implementations may return nullptr. More...
size_t	EstimateSize () const override
	Estimate database size. More...
Public Member Functions inherited from CCoinsView
virtual	~CCoinsView ()=default
	As we use CCoinsViews polymorphically, have a virtual destructor. More...
virtual std::optional< Coin >	GetCoin (const COutPoint &outpoint) const =0
	Retrieve the Coin (unspent transaction output) for a given outpoint. More...
virtual std::optional< Coin >	PeekCoin (const COutPoint &outpoint) const =0
	Retrieve the Coin (unspent transaction output) for a given outpoint, without caching results. More...
virtual bool	HaveCoin (const COutPoint &outpoint) const =0
	Just check whether a given outpoint is unspent. More...
virtual uint256	GetBestBlock () const =0
	Retrieve the block hash whose state this CCoinsView currently represents. More...
virtual std::vector< uint256 >	GetHeadBlocks () const =0
	Retrieve the range of blocks that may have been only partially written. More...
virtual void	BatchWrite (CoinsViewCacheCursor &cursor, const uint256 &block_hash)=0
	Do a bulk modification (multiple Coin changes + BestBlock change). More...
virtual std::unique_ptr< CCoinsViewCursor >	Cursor () const =0
	Get a cursor to iterate over the whole state. Implementations may return nullptr. More...
virtual size_t	EstimateSize () const =0
	Estimate database size. More...

Static Public Member Functions
static CoinsViewEmpty &	Get ()

Protected Member Functions
	CoinsViewEmpty ()=default

Detailed Description

Noop coins view.

Definition at line 346 of file coins.h.

Constructor & Destructor Documentation

CoinsViewEmpty() [1/2]

CoinsViewEmpty::CoinsViewEmpty ( )

protecteddefault

CoinsViewEmpty() [2/2]

CoinsViewEmpty::CoinsViewEmpty ( const CoinsViewEmpty &  )

delete

Member Function Documentation

BatchWrite()

void CoinsViewEmpty::BatchWrite ( CoinsViewCacheCursor &  cursor, const uint256 &  block_hash  )

inlineoverridevirtual

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

The passed cursor is used to iterate through the coins.

Implements CCoinsView.

Definition at line 362 of file coins.h.

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Cursor()

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

inlineoverridevirtual

Get a cursor to iterate over the whole state. Implementations may return nullptr.

Implements CCoinsView.

Definition at line 366 of file coins.h.

EstimateSize()

size_t CoinsViewEmpty::EstimateSize ( ) const

inlineoverridevirtual

Estimate database size.

Implements CCoinsView.

Definition at line 367 of file coins.h.

Get()

CoinsViewEmpty & CoinsViewEmpty::Get ( )

static

Definition at line 17 of file coins.cpp.

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GetBestBlock()

uint256 CoinsViewEmpty::GetBestBlock ( ) const

inlineoverridevirtual

Retrieve the block hash whose state this CCoinsView currently represents.

Implements CCoinsView.

Definition at line 360 of file coins.h.

GetCoin()

std::optional< Coin > CoinsViewEmpty::GetCoin ( const COutPoint &  outpoint ) const

inlineoverridevirtual

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

May populate the cache. Use PeekCoin() to perform a non-caching lookup.

Implements CCoinsView.

Definition at line 357 of file coins.h.

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GetHeadBlocks()

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

inlineoverridevirtual

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.

Implements CCoinsView.

Definition at line 361 of file coins.h.

HaveCoin()

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

inlineoverridevirtual

Just check whether a given outpoint is unspent.

May populate the cache. Use PeekCoin() to perform a non-caching lookup.

Implements CCoinsView.

Definition at line 359 of file coins.h.

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operator=()

CoinsViewEmpty & CoinsViewEmpty::operator= ( const CoinsViewEmpty &  )

delete

PeekCoin()

std::optional< Coin > CoinsViewEmpty::PeekCoin ( const COutPoint &  outpoint ) const

inlineoverridevirtual

Retrieve the Coin (unspent transaction output) for a given outpoint, without caching results.

Does not populate the cache. Use GetCoin() to cache the result.

Implements CCoinsView.

Definition at line 358 of file coins.h.

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

• src/coins.h
• src/coins.cpp