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>

Inheritance diagram for TxOrphanage:

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Classes
struct	IteratorComparator

struct	OrphanTx

struct	OrphanTxBase
	Allows providing orphan information externally. More...

Public Member Functions
bool	AddTx (const CTransactionRef &tx, NodeId peer)
	Add a new orphan transaction. More...

bool	HaveTx (const Wtxid &wtxid) const
	Check if we already have an orphan transaction (by wtxid only) More...

CTransactionRef	GetTxToReconsider (NodeId peer)
	Extract a transaction from a peer's work set Returns nullptr if there are no transactions to work on. More...

int	EraseTx (const Wtxid &wtxid)
	Erase an orphan by wtxid. More...

void	EraseForPeer (NodeId peer)
	Erase all orphans announced by a peer (eg, after that peer disconnects) More...

void	EraseForBlock (const CBlock &block)
	Erase all orphans included in or invalidated by a new block. More...

void	LimitOrphans (unsigned int max_orphans, FastRandomContext &rng)
	Limit the orphanage to the given maximum. More...

void	AddChildrenToWorkSet (const CTransaction &tx)
	Add any orphans that list a particular tx as a parent into the from peer's work set. More...

bool	HaveTxToReconsider (NodeId peer)
	Does this peer have any work to do? More...

std::vector< CTransactionRef >	GetChildrenFromSamePeer (const CTransactionRef &parent, NodeId nodeid) const
	Get all children that spend from this tx and were received from nodeid. More...

std::vector< std::pair< CTransactionRef, NodeId > >	GetChildrenFromDifferentPeer (const CTransactionRef &parent, NodeId nodeid) const
	Get all children that spend from this tx but were not received from nodeid. More...

size_t	Size () const
	Return how many entries exist in the orphange. More...

std::vector< OrphanTxBase >	GetOrphanTransactions () const

Protected Types
using	OrphanMap = decltype(m_orphans)

Protected Attributes
std::map< Wtxid, OrphanTx >	m_orphans
	Map from wtxid to orphan transaction record. More...

std::map< NodeId, std::set< Wtxid > >	m_peer_work_set
	Which peer provided the orphans that need to be reconsidered. More...

std::map< COutPoint, std::set< OrphanMap::iterator, IteratorComparator > >	m_outpoint_to_orphan_it
	Index from the parents' COutPoint into the m_orphans. More...

std::vector< OrphanMap::iterator >	m_orphan_list
	Orphan transactions in vector for quick random eviction. More...

NodeSeconds	m_next_sweep {0s}
	Timestamp for the next scheduled sweep of expired orphans. 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.

Not thread-safe. Requires external synchronization.

Definition at line 28 of file txorphanage.h.

Member Typedef Documentation

◆ OrphanMap

using TxOrphanage::OrphanMap = decltype(m_orphans)

protected

Definition at line 96 of file txorphanage.h.

Member Function Documentation

◆ AddChildrenToWorkSet()

void TxOrphanage::AddChildrenToWorkSet ( const CTransaction & tx )

Add any orphans that list a particular tx as a parent into the from peer's work set.

Definition at line 132 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 15 of file txorphanage.cpp.

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◆ EraseForBlock()

void TxOrphanage::EraseForBlock ( const CBlock & block )

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

Definition at line 183 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 83 of file txorphanage.cpp.

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◆ EraseTx()

int TxOrphanage::EraseTx ( const Wtxid & wtxid )

Erase an orphan by wtxid.

Definition at line 48 of file txorphanage.cpp.

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◆ GetChildrenFromDifferentPeer()

std::vector< std::pair< CTransactionRef, NodeId > > TxOrphanage::GetChildrenFromDifferentPeer	(	const CTransactionRef &	parent,
		NodeId	nodeid
	)		const

Get all children that spend from this tx but were not received from nodeid.

Also return which peer provided each tx.

Definition at line 251 of file txorphanage.cpp.

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◆ GetChildrenFromSamePeer()

std::vector< CTransactionRef > TxOrphanage::GetChildrenFromSamePeer	(	const CTransactionRef &	parent,
		NodeId	nodeid
	)		const

Get all children that spend from this tx and were received from nodeid.

Sorted from most recent to least recent.

Definition at line 211 of file txorphanage.cpp.

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◆ GetOrphanTransactions()

std::vector< TxOrphanage::OrphanTxBase > TxOrphanage::GetOrphanTransactions ( ) const

Definition at line 281 of file txorphanage.cpp.

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◆ GetTxToReconsider()

CTransactionRef TxOrphanage::GetTxToReconsider ( NodeId peer )

Extract a transaction from a peer's work set Returns nullptr if there are no transactions to work on.

Otherwise returns the transaction reference, and removes it from the work set.

Definition at line 155 of file txorphanage.cpp.

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◆ HaveTx()

bool TxOrphanage::HaveTx ( const Wtxid & wtxid ) const

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

Definition at line 150 of file txorphanage.cpp.

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◆ HaveTxToReconsider()

bool TxOrphanage::HaveTxToReconsider ( NodeId peer )

Does this peer have any work to do?

Definition at line 173 of file txorphanage.cpp.

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◆ LimitOrphans()

void TxOrphanage::LimitOrphans	(	unsigned int	max_orphans,
		FastRandomContext &	rng
	)

Limit the orphanage to the given maximum.

Definition at line 100 of file txorphanage.cpp.

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◆ Size()

size_t TxOrphanage::Size ( ) const

inline

Return how many entries exist in the orphange.

Definition at line 70 of file txorphanage.h.

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Member Data Documentation

◆ m_next_sweep

NodeSeconds TxOrphanage::m_next_sweep {0s}

protected

Timestamp for the next scheduled sweep of expired orphans.

Definition at line 115 of file txorphanage.h.

◆ m_orphan_list

std::vector<OrphanMap::iterator> TxOrphanage::m_orphan_list

protected

Orphan transactions in vector for quick random eviction.

Definition at line 112 of file txorphanage.h.

◆ m_orphans

std::map<Wtxid, OrphanTx> TxOrphanage::m_orphans

protected

Map from wtxid to orphan transaction record.

Limited by -maxorphantx/DEFAULT_MAX_ORPHAN_TRANSACTIONS

Definition at line 91 of file txorphanage.h.

◆ m_outpoint_to_orphan_it

std::map<COutPoint, std::set<OrphanMap::iterator, IteratorComparator> > TxOrphanage::m_outpoint_to_orphan_it

protected

Index from the parents' COutPoint into the m_orphans.

Used to remove orphan transactions from the m_orphans

Definition at line 109 of file txorphanage.h.

◆ m_peer_work_set

std::map<NodeId, std::set<Wtxid> > TxOrphanage::m_peer_work_set

protected

Which peer provided the orphans that need to be reconsidered.

Definition at line 94 of file txorphanage.h.

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

src/txorphanage.h
src/txorphanage.cpp

Classes

Public Member Functions

Protected Types

Protected Attributes

Detailed Description

Member Typedef Documentation

◆ OrphanMap

Member Function Documentation

◆ AddChildrenToWorkSet()

◆ AddTx()

◆ EraseForBlock()

◆ EraseForPeer()

◆ EraseTx()

◆ GetChildrenFromDifferentPeer()

◆ GetChildrenFromSamePeer()

◆ GetOrphanTransactions()

◆ GetTxToReconsider()

◆ HaveTx()

◆ HaveTxToReconsider()

◆ LimitOrphans()

◆ Size()

Member Data Documentation

◆ m_next_sweep

◆ m_orphan_list

◆ m_orphans

◆ m_outpoint_to_orphan_it

◆ m_peer_work_set