TxOrphanage Class Reference

A class to track orphan transactions (failed on TX_MISSING_INPUTS) Since we cannot distinguish orphans from bad transactions with non-existent inputs, we heavily limit the number of orphans we keep and the duration we keep them for. More...

#include <txorphanage.h>

Collaboration diagram for TxOrphanage:

Classes
struct	IteratorComparator
struct	OrphanTx

Public Member Functions
bool	AddTx (const CTransactionRef &tx, NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Add a new orphan transaction. More...
int	EraseTx (const uint256 &txid) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Erase an orphan by txid. More...
void	EraseForPeer (NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Erase all orphans announced by a peer (eg, after that peer disconnects) More...
void	AddChildrenToWorkSet (const CTransaction &tx, std::set< uint256 > &orphan_work_set) const EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Add any orphans that list a particular tx as a parent into a peer's work set (ie orphans that may have found their final missing parent, and so should be reconsidered for the mempool) More...
size_t	Size () LOCKS_EXCLUDED(
	Return how many entries exist in the orphange. More...

Public Attributes
bool HaveTx(const GenTxid &gtxid) const LOCKS_EXCLUDED(std::pair< CTransactionRef, NodeId >	GetTx (const uint256 &txid) const EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Check if we already have an orphan transaction (by txid or wtxid) More...
void EraseForBlock(const CBlock &block) LOCKS_EXCLUDED(unsigned int	LimitOrphans (unsigned int max_orphans) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
	Erase all orphans included in or invalidated by a new block. More...

Protected Types
using	OrphanMap = decltype(m_orphans)

Protected Member Functions
std::map< uint256, OrphanTx > m_orphans	GUARDED_BY (g_cs_orphans)
	Map from txid to orphan transaction record. More...
std::map< COutPoint, std::set< OrphanMap::iterator, IteratorComparator > > m_outpoint_to_orphan_it	GUARDED_BY (g_cs_orphans)
	Index from the parents' COutPoint into the m_orphans. More...
std::vector< OrphanMap::iterator > m_orphan_list	GUARDED_BY (g_cs_orphans)
	Orphan transactions in vector for quick random eviction. More...
std::map< uint256, OrphanMap::iterator > m_wtxid_to_orphan_it	GUARDED_BY (g_cs_orphans)
	Index from wtxid into the m_orphans to lookup orphan transactions using their witness ids. More...

Detailed Description

A class to track orphan transactions (failed on TX_MISSING_INPUTS) Since we cannot distinguish orphans from bad transactions with non-existent inputs, we heavily limit the number of orphans we keep and the duration we keep them for.

Definition at line 21 of file txorphanage.h.

Member Typedef Documentation

OrphanMap

using TxOrphanage::OrphanMap = decltype(m_orphans)

protected

Definition at line 69 of file txorphanage.h.

Member Function Documentation

AddChildrenToWorkSet()

void TxOrphanage::AddChildrenToWorkSet	(	const CTransaction &	tx,
		std::set< uint256 > &	orphan_work_set
	)		const

Add any orphans that list a particular tx as a parent into a peer's work set (ie orphans that may have found their final missing parent, and so should be reconsidered for the mempool)

Definition at line 141 of file txorphanage.cpp.

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AddTx()

bool TxOrphanage::AddTx	(	const CTransactionRef &	tx,
		NodeId	peer
	)

Add a new orphan transaction.

Definition at line 20 of file txorphanage.cpp.

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EraseForPeer()

void TxOrphanage::EraseForPeer

(

NodeId

peer

)

Erase all orphans announced by a peer (eg, after that peer disconnects)

Definition at line 88 of file txorphanage.cpp.

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EraseTx()

int TxOrphanage::EraseTx

(

const uint256 &

txid

)

Erase an orphan by txid.

Definition at line 56 of file txorphanage.cpp.

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GUARDED_BY() [1/4]

std::map<uint256, OrphanTx> m_orphans TxOrphanage::GUARDED_BY ( g_cs_orphans  )

protected

Map from txid to orphan transaction record.

Limited by -maxorphantx/DEFAULT_MAX_ORPHAN_TRANSACTIONS

GUARDED_BY() [2/4]

std::map<COutPoint, std::set<OrphanMap::iterator, IteratorComparator> > m_outpoint_to_orphan_it TxOrphanage::GUARDED_BY ( g_cs_orphans  )

protected

Index from the parents' COutPoint into the m_orphans.

Used to remove orphan transactions from the m_orphans

GUARDED_BY() [3/4]

std::vector<OrphanMap::iterator> m_orphan_list TxOrphanage::GUARDED_BY ( g_cs_orphans  )

protected

Orphan transactions in vector for quick random eviction.

GUARDED_BY() [4/4]

std::map<uint256, OrphanMap::iterator> m_wtxid_to_orphan_it TxOrphanage::GUARDED_BY ( g_cs_orphans  )

protected

Index from wtxid into the m_orphans to lookup orphan transactions using their witness ids.

Size()

size_t TxOrphanage::Size ( )

inline

Return how many entries exist in the orphange.

Definition at line 51 of file txorphanage.h.

Member Data Documentation

GetTx

std::pair< CTransactionRef, NodeId > TxOrphanage::GetTx

Check if we already have an orphan transaction (by txid or wtxid)

Get an orphan transaction and its originating peer (Transaction ref will be nullptr if not found)

Definition at line 32 of file txorphanage.h.

LimitOrphans

unsigned int TxOrphanage::LimitOrphans

Erase all orphans included in or invalidated by a new block.

Limit the orphanage to the given maximum

Definition at line 44 of file txorphanage.h.

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

• src/txorphanage.h
• src/txorphanage.cpp