CCoinsViewMemPool Class Reference

CCoinsView that brings transactions from a memorypool into view. More...

#include <txmempool.h>

Inheritance diagram for CCoinsViewMemPool:

Collaboration diagram for CCoinsViewMemPool:

Public Member Functions
	CCoinsViewMemPool (CCoinsView *baseIn, const CTxMemPool &mempoolIn)
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...
Public Member Functions inherited from CCoinsViewBacked
	CCoinsViewBacked (CCoinsView *viewIn)
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	SetBackend (CCoinsView &viewIn)
bool	BatchWrite (CCoinsMap &mapCoins, const uint256 &hashBlock) override
	Do a bulk modification (multiple Coin changes + BestBlock change). More...
CCoinsViewCursor *	Cursor () const override
	Get a cursor to iterate over the whole state. 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
const CTxMemPool &	mempool
Protected Attributes inherited from CCoinsViewBacked
CCoinsView *	base

Detailed Description

CCoinsView that brings transactions from a memorypool into view.

It does not check for spendings by memory pool transactions. Instead, it provides access to all Coins which are either unspent in the base CCoinsView, or are outputs from any mempool transaction! This allows transaction replacement to work as expected, as you want to have all inputs "available" to check signatures, and any cycles in the dependency graph are checked directly in AcceptToMemoryPool. It also allows you to sign a double-spend directly in signrawtransaction, as long as the conflicting transaction is not yet confirmed.

Definition at line 743 of file txmempool.h.

Constructor & Destructor Documentation

CCoinsViewMemPool::CCoinsViewMemPool	(	CCoinsView *	baseIn,
		const CTxMemPool &	mempoolIn
	)

Definition at line 898 of file txmempool.cpp.

Member Function Documentation

bool CCoinsViewMemPool::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 CCoinsViewBacked.

Definition at line 900 of file txmempool.cpp.

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

overridevirtual

Just check whether a given outpoint is unspent.

Reimplemented from CCoinsViewBacked.

Definition at line 916 of file txmempool.cpp.

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Member Data Documentation

const CTxMemPool& CCoinsViewMemPool::mempool

protected

Definition at line 746 of file txmempool.h.

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

• src/txmempool.h
• src/txmempool.cpp