Chainstate stores and provides an API to update our local knowledge of the current best chain. More...

#include <validation.h>

Collaboration diagram for Chainstate:

Public Member Functions
	Chainstate (CTxMemPool *mempool, node::BlockManager &blockman, ChainstateManager &chainman, std::optional< BlockHash > from_snapshot_blockhash=std::nullopt)

void	InitCoinsDB (size_t cache_size_bytes, bool in_memory, bool should_wipe, std::string leveldb_name="chainstate")
	Initialize the CoinsViews UTXO set database management data structures.

void InitCoinsCache(size_t cache_size_bytes) EXCLUSIVE_LOCKS_REQUIRED(bool	CanFlushToDisk () const EXCLUSIVE_LOCKS_REQUIRED(
	Initialize the in-memory coins cache (to be done after the health of the on-disk database is verified).

bool	reliesOnAssumedValid ()
	Return true if this chainstate relies on blocks that are assumed-valid.

CCoinsViewCache &	CoinsTip () EXCLUSIVE_LOCKS_REQUIRED(

CCoinsViewDB &	CoinsDB () EXCLUSIVE_LOCKS_REQUIRED(

CTxMemPool *	GetMempool ()

CCoinsViewErrorCatcher &	CoinsErrorCatcher () EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	ResetCoinsViews ()
	Destructs all objects related to accessing the UTXO set.

bool	HasCoinsViews () const
	Does this chainstate have a UTXO set attached?

bool ResizeCoinsCaches(size_t coinstip_size, size_t coinsdb_size) EXCLUSIVE_LOCKS_REQUIRED(void	LoadExternalBlockFile (FILE fileIn, FlatFilePos dbp=nullptr, std::multimap< BlockHash, FlatFilePos > blocks_with_unknown_parent=nullptr, avalanche::Processor const avalanche=nullptr) EXCLUSIVE_LOCKS_REQUIRED(!m_chainstate_mutex
	Resize the CoinsViews caches dynamically and flush state to disk.

bool	FlushStateToDisk (BlockValidationState &state, FlushStateMode mode, int nManualPruneHeight=0)
	Update the on-disk chain state.

void	ForceFlushStateToDisk ()
	Unconditionally flush all changes to disk.

void	PruneAndFlush ()
	Prune blockfiles from the disk if necessary and then flush chainstate changes if we pruned.

bool	ActivateBestChain (BlockValidationState &state, std::shared_ptr< const CBlock > pblock=nullptr, avalanche::Processor *const avalanche=nullptr, bool skip_checkblockindex=false) EXCLUSIVE_LOCKS_REQUIRED(!m_chainstate_mutex
	Find the best known block, and make it the tip of the block chain.

bool !cs_avalancheFinalizedBlockIndex	LOCKS_EXCLUDED (cs_main)

bool	AcceptBlock (const std::shared_ptr< const CBlock > &pblock, BlockValidationState &state, bool fRequested, const FlatFilePos dbp, bool fNewBlock, bool min_pow_checked) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Store a block on disk.

bool	DisconnectTip (BlockValidationState &state, DisconnectedBlockTransactions *disconnectpool) EXCLUSIVE_LOCKS_REQUIRED(cs_main
	Disconnect m_chain's tip.

bool	PreciousBlock (BlockValidationState &state, CBlockIndex pindex, avalanche::Processor const avalanche=nullptr) EXCLUSIVE_LOCKS_REQUIRED(!m_chainstate_mutex
	Mark a block as precious and reorganize.

bool !cs_avalancheFinalizedBlockIndex	LOCKS_EXCLUDED (cs_main)

bool	InvalidateBlock (BlockValidationState &state, CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(!m_chainstate_mutex
	Mark a block as invalid.

bool	ParkBlock (BlockValidationState &state, CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(!m_chainstate_mutex
	Park a block.

bool	AvalancheFinalizeBlock (CBlockIndex *pindex, avalanche::Processor &avalanche) EXCLUSIVE_LOCKS_REQUIRED(!cs_avalancheFinalizedBlockIndex)
	Mark a block as finalized by avalanche.

void	ClearAvalancheFinalizedBlock () EXCLUSIVE_LOCKS_REQUIRED(!cs_avalancheFinalizedBlockIndex)
	Clear avalanche finalization.

bool	IsBlockAvalancheFinalized (const CBlockIndex *pindex) const EXCLUSIVE_LOCKS_REQUIRED(!cs_avalancheFinalizedBlockIndex)
	Checks if a block is finalized by avalanche voting.

void	ResetBlockFailureFlags (CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Remove invalidity status from a block and its descendants.

template<typename F >
bool	UpdateFlagsForBlock (CBlockIndex pindexBase, CBlockIndex pindex, F f) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

template<typename F , typename C , typename AC >
void	UpdateFlags (CBlockIndex pindex, CBlockIndex &pindexReset, F f, C fChild, AC fAncestorWasChanged) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	UnparkBlockAndChildren (CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Remove parked status from a block and its descendants.

void	UnparkBlock (CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Remove parked status from a block.

bool	ReplayBlocks ()
	Replay blocks that aren't fully applied to the database.

bool	LoadGenesisBlock ()
	Ensures we have a genesis block in the block tree, possibly writing one to disk.

void	PruneBlockIndexCandidates ()
	Delete all entries in setBlockIndexCandidates that are worse than the current tip.

void	UnloadBlockIndex () EXCLUSIVE_LOCKS_REQUIRED(cs_main)

bool	IsInitialBlockDownload () const
	Check whether we are doing an initial block download (synchronizing from disk or network)

const CBlockIndex *	FindForkInGlobalIndex (const CBlockLocator &locator) const EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Find the last common block of this chain and a locator.

void	CheckBlockIndex ()
	Make various assertions about the state of the block index.

void	LoadMempool (const fs::path &load_path, fsbridge::FopenFn mockable_fopen_function=fsbridge::fopen)
	Load the persisted mempool from disk.

bool	LoadChainTip () EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Update the chain tip based on database information, i.e.

CoinsCacheSizeState GetCoinsCacheSizeState() EXCLUSIVE_LOCKS_REQUIRED(CoinsCacheSizeState GetCoinsCacheSizeState(size_t max_coins_cache_size_bytes, size_t max_mempool_size_bytes) EXCLUSIVE_LOCKS_REQUIRED(std::string ToString() EXCLUSIVE_LOCKS_REQUIRED(RecursiveMutex *	MempoolMutex () const LOCK_RETURNED(m_mempool -> cs)
	Dictates whether we need to flush the cache to disk or not.

Public Attributes
node::BlockManager &	m_blockman
	Reference to a BlockManager instance which itself is shared across all Chainstate instances.

ChainstateManager &	m_chainman
	The chainstate manager that owns this chainstate.

CChain	m_chain
	The current chain of blockheaders we consult and build on.

const std::optional< BlockHash >	m_from_snapshot_blockhash {}
	The blockhash which is the base of the snapshot this chainstate was created from.

std::set< CBlockIndex *, CBlockIndexWorkComparator >	setBlockIndexCandidates
	The set of all CBlockIndex entries with either BLOCK_VALID_TRANSACTIONS (for itself and all ancestors) or BLOCK_ASSUMED_VALID (if using background chainstates) and as good as our current tip or better.

size_t	m_coinsdb_cache_size_bytes {0}
	The cache size of the on-disk coins view.

size_t	m_coinstip_cache_size_bytes {0}
	The cache size of the in-memory coins view.

bool ResizeCoinsCaches(size_t coinstip_size, size_t coinsdb_size) EXCLUSIVE_LOCKS_REQUIRED(void	!cs_avalancheFinalizedBlockIndex

DisconnectResult DisconnectBlock(const CBlock &block, const CBlockIndex *pindex, CCoinsViewCache &view) EXCLUSIVE_LOCKS_REQUIRED(boo	ConnectBlock )(const CBlock &block, BlockValidationState &state, CBlockIndex pindex, CCoinsViewCache &view, BlockValidationOptions options, Amount blockFees=nullptr, bool fJustCheck=false) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Apply the effects of this block (with given index) on the UTXO set represented by coins.

bool m_mempool	cs

bool	!cs_avalancheFinalizedBlockIndex

Protected Member Functions
bool m_disabled	GUARDED_BY (::cs_main)
	This toggle exists for use when doing background validation for UTXO snapshots.

const CBlockIndex *m_avalancheFinalizedBlockIndex	GUARDED_BY (cs_avalancheFinalizedBlockIndex)
	The best block via avalanche voting.

Protected Attributes
Mutex	m_chainstate_mutex
	The ChainState Mutex.

std::atomic< int32_t >	nBlockSequenceId {1}
	Every received block is assigned a unique and increasing identifier, so we know which one to give priority in case of a fork.

int32_t	nBlockReverseSequenceId = -1
	Decreasing counter (used by subsequent preciousblock calls).

arith_uint256	nLastPreciousChainwork = 0
	chainwork for the last block that preciousblock has been applied to.

std::atomic< bool >	m_cached_finished_ibd {false}
	Whether this chainstate is undergoing initial block download.

CTxMemPool *	m_mempool
	Optional mempool that is kept in sync with the chain.

std::unique_ptr< CoinsViews >	m_coins_views
	Manages the UTXO set, which is a reflection of the contents of `m_chain`.

Mutex	cs_avalancheFinalizedBlockIndex

CRollingBloomFilter	m_filterParkingPoliciesApplied
	Filter to prevent parking a block due to block policies more than once.

CBlockIndex const *	m_best_fork_tip = nullptr

CBlockIndex const *	m_best_fork_base = nullptr

Private Member Functions
bool	ActivateBestChainStep (BlockValidationState &state, CBlockIndex pindexMostWork, const std::shared_ptr< const CBlock > &pblock, bool &fInvalidFound, const avalanche::Processor const avalanche=nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main
	Try to make some progress towards making pindexMostWork the active block.

bool	ConnectTip (BlockValidationState &state, BlockPolicyValidationState &blockPolicyState, CBlockIndex pindexNew, const std::shared_ptr< const CBlock > &pblock, DisconnectedBlockTransactions &disconnectpool, const avalanche::Processor const avalanche=nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main
	Connect a new block to m_chain.

void	InvalidBlockFound (CBlockIndex *pindex, const BlockValidationState &state) EXCLUSIVE_LOCKS_REQUIRED(cs_main

CBlockIndex *	FindMostWorkChain (std::vector< const CBlockIndex * > &blocksToReconcile, bool fAutoUnpark) EXCLUSIVE_LOCKS_REQUIRED(cs_main
	Return the tip of the chain with the most work in it, that isn't known to be invalid (it's however far from certain to be valid).

void	ReceivedBlockTransactions (const CBlock &block, CBlockIndex *pindexNew, const FlatFilePos &pos) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Mark a block as having its data received and checked (up to BLOCK_VALID_TRANSACTIONS).

bool	RollforwardBlock (const CBlockIndex *pindex, CCoinsViewCache &inputs) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Apply the effects of a block on the utxo cache, ignoring that it may already have been applied.

void	UnparkBlockImpl (CBlockIndex *pindex, bool fClearChildren) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

bool	UnwindBlock (BlockValidationState &state, CBlockIndex *pindex, bool invalidate) EXCLUSIVE_LOCKS_REQUIRED(m_chainstate_mutex

void	CheckForkWarningConditions () EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	CheckForkWarningConditionsOnNewFork (CBlockIndex *pindexNewForkTip) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	InvalidChainFound (CBlockIndex *pindexNew) EXCLUSIVE_LOCKS_REQUIRED(cs_main

const CBlockIndex *	FindBlockToFinalize (CBlockIndex *pindexNew) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

Private Attributes
bool m_mempool	!cs_avalancheFinalizedBlockIndex

void	!cs_avalancheFinalizedBlockIndex

CBlockIndex	!cs_avalancheFinalizedBlockIndex

void UpdateTip(const CBlockIndex *pindexNew) EXCLUSIVE_LOCKS_REQUIRED(std::chrono::microsecond	m_last_write ) {0}
	Check warning conditions and do some notifications on new chain tip set.

std::chrono::microseconds	m_last_flush {0}

util::Result< void > InvalidateCoinsDBOnDisk() EXCLUSIVE_LOCKS_REQUIRED(friend	ChainstateManager
	In case of an invalid snapshot, rename the coins leveldb directory so that it can be examined for issue diagnosis.

Detailed Description

Chainstate stores and provides an API to update our local knowledge of the current best chain.

Eventually, the API here is targeted at being exposed externally as a consumable libconsensus library, so any functions added must only call other class member functions, pure functions in other parts of the consensus library, callbacks via the validation interface, or read/write-to-disk functions (eventually this will also be via callbacks).

Anything that is contingent on the current tip of the chain is stored here, whereas block information and metadata independent of the current tip is kept in BlockManager.

Definition at line 699 of file validation.h.

Constructor & Destructor Documentation

◆ Chainstate()

Chainstate::Chainstate	(	CTxMemPool *	mempool,
		node::BlockManager &	blockman,
		ChainstateManager &	chainman,
		std::optional< BlockHash >	from_snapshot_blockhash = `std::nullopt`
	)

explicit

Definition at line 1518 of file validation.cpp.

Member Function Documentation

◆ AcceptBlock()

bool Chainstate::AcceptBlock	(	const std::shared_ptr< const CBlock > &	pblock,
		BlockValidationState &	state,
		bool	fRequested,
		const FlatFilePos *	dbp,
		bool *	fNewBlock,
		bool	min_pow_checked
	)

Store a block on disk.

Parameters

[in,out]	pblock	The block we want to accept.
[in]	fRequested	A boolean to indicate if this block was requested from our peers.
[in]	dbp	If non-null, the disk position of the block.
[in,out]	fNewBlock	True if block was first received via this call.
[in]	min_pow_checked	True if proof-of-work anti-DoS checks have been done by caller for headers chain

Returns: True if the block is accepted as a valid block and written to disk.

Definition at line 4707 of file validation.cpp.

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◆ ActivateBestChain()

bool Chainstate::ActivateBestChain	(	BlockValidationState &	state,
		std::shared_ptr< const CBlock >	pblock = `nullptr`,
		avalanche::Processor *const	avalanche = `nullptr`,
		bool	skip_checkblockindex = `false`
	)

Find the best known block, and make it the tip of the block chain.

The result is either failure or an activated best chain. pblock is either nullptr or a pointer to a block that is already loaded (to avoid loading it again from disk).

ActivateBestChain is split into steps (see ActivateBestChainStep) so that we avoid holding cs_main for an extended period of time; the length of this call may be quite long during reindexing or a substantial reorg.

May not be called with cs_main held. May not be called in a validationinterface callback.

Note that if this is called while a snapshot chainstate is active, and if it is called on a background chainstate whose tip has reached the base block of the snapshot, its execution will take MINUTES while it hashes the background UTXO set to verify the assumeutxo value the snapshot was activated with. cs_main will be held during this time.

Parameters

[in] skip_checkblockindex (optional) If true, skip calling CheckBlockIndex even if -checkblockindex is true. If false (default behavior), respect the -checkblockindex arg. This is used in tests when we need to skip the checks only temporarily, and resume normal behavior later.

Returns: true unless a system error occurred

Definition at line 3452 of file validation.cpp.

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◆ ActivateBestChainStep()

bool Chainstate::ActivateBestChainStep	(	BlockValidationState &	state,
		CBlockIndex *	pindexMostWork,
		const std::shared_ptr< const CBlock > &	pblock,
		bool &	fInvalidFound,
		const avalanche::Processor *const	avalanche = `nullptr`
	)

private

Try to make some progress towards making pindexMostWork the active block.

pblock is either nullptr or a pointer to a CBlock corresponding to pindexMostWork.

Returns: true unless a system error occurred

Definition at line 3277 of file validation.cpp.

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◆ AvalancheFinalizeBlock()

bool Chainstate::AvalancheFinalizeBlock	(	CBlockIndex *	pindex,
		avalanche::Processor &	avalanche
	)

Mark a block as finalized by avalanche.

Definition at line 4034 of file validation.cpp.

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◆ CanFlushToDisk()

void InitCoinsCache(size_t cache_size_bytes) EXCLUSIVE_LOCKS_REQUIRED(bool Chainstate::CanFlushToDisk ( ) const

inline

Initialize the in-memory coins cache (to be done after the health of the on-disk database is verified).

Returns: whether or not the CoinsViews object has been fully initialized and we can safely flush this object to disk.

Definition at line 801 of file validation.h.

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◆ CheckBlockIndex()

void Chainstate::CheckBlockIndex ( )

Make various assertions about the state of the block index.

By default this only executes fully when using the Regtest chain; see: m_options.check_block_index.

Definition at line 5865 of file validation.cpp.

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◆ CheckForkWarningConditions()

void Chainstate::CheckForkWarningConditions ( )

private

Definition at line 1580 of file validation.cpp.

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◆ CheckForkWarningConditionsOnNewFork()

void Chainstate::CheckForkWarningConditionsOnNewFork ( CBlockIndex * pindexNewForkTip )

private

Definition at line 1631 of file validation.cpp.

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◆ ClearAvalancheFinalizedBlock()

void Chainstate::ClearAvalancheFinalizedBlock ( )

Clear avalanche finalization.

Definition at line 4064 of file validation.cpp.

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◆ CoinsDB()

CCoinsViewDB & Chainstate::CoinsDB ( )

inline

Returns: A reference to the on-disk UTXO set database.

Definition at line 841 of file validation.h.

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◆ CoinsErrorCatcher()

CCoinsViewErrorCatcher & Chainstate::CoinsErrorCatcher ( )

inline

Returns: A reference to a wrapped view of the in-memory UTXO set that handles disk read errors gracefully.

Definition at line 851 of file validation.h.

◆ CoinsTip()

CCoinsViewCache & Chainstate::CoinsTip ( )

inline

Returns: A reference to the in-memory cache of the UTXO set.

Definition at line 834 of file validation.h.

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◆ ConnectTip()

bool Chainstate::ConnectTip	(	BlockValidationState &	state,
		BlockPolicyValidationState &	blockPolicyState,
		CBlockIndex *	pindexNew,
		const std::shared_ptr< const CBlock > &	pblock,
		DisconnectedBlockTransactions &	disconnectpool,
		const avalanche::Processor *const	avalanche = `nullptr`
	)

private

Connect a new block to m_chain.

pblock is either nullptr or a pointer to a CBlock corresponding to pindexNew, to bypass loading it again from disk.

The block is valid by consensus rules so now we check if the block passes all block policy checks. If not, then park the block and bail.

We check block parking policies before flushing changes to the UTXO set. This allows us to avoid rewinding everything immediately after.

Only check block parking policies the first time the block is connected. Avalanche voting can override the parking decision made by these policies.

Definition at line 2888 of file validation.cpp.

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◆ DisconnectTip()

bool Chainstate::DisconnectTip	(	BlockValidationState &	state,
		DisconnectedBlockTransactions *	disconnectpool
	)

Disconnect m_chain's tip.

After calling, the mempool will be in an inconsistent state, with transactions from disconnected blocks being added to disconnectpool. You should make the mempool consistent again by calling updateMempoolForReorg. with cs_main held.

If disconnectpool is nullptr, then no disconnected transactions are added to disconnectpool (note that the caller is responsible for mempool consistency in any case).

Definition at line 2792 of file validation.cpp.

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◆ FindBlockToFinalize()

const CBlockIndex * Chainstate::FindBlockToFinalize ( CBlockIndex * pindexNew )

private

◆ FindForkInGlobalIndex()

const CBlockIndex * Chainstate::FindForkInGlobalIndex ( const CBlockLocator & locator ) const

Find the last common block of this chain and a locator.

Definition at line 125 of file validation.cpp.

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◆ FindMostWorkChain()

CBlockIndex * Chainstate::FindMostWorkChain	(	std::vector< const CBlockIndex * > &	blocksToReconcile,
		bool	fAutoUnpark
	)

private

Return the tip of the chain with the most work in it, that isn't known to be invalid (it's however far from certain to be valid).

Definition at line 3093 of file validation.cpp.

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◆ FlushStateToDisk()

bool Chainstate::FlushStateToDisk	(	BlockValidationState &	state,
		FlushStateMode	mode,
		int	nManualPruneHeight = `0`
	)

Update the on-disk chain state.

The caches and indexes are flushed depending on the mode we're called with if they're too large, if it's been a while since the last write, or always and in all cases if we're in prune mode and are deleting files.

If FlushStateMode::NONE is used, then FlushStateToDisk(...) won't do anything besides checking if we need to prune.

Returns: true unless a system error occurred

Definition at line 2533 of file validation.cpp.

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◆ ForceFlushStateToDisk()

void Chainstate::ForceFlushStateToDisk ( )

Unconditionally flush all changes to disk.

Definition at line 2714 of file validation.cpp.

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◆ GetMempool()

CTxMemPool * Chainstate::GetMempool ( )

inline

Returns: A pointer to the mempool.

Definition at line 847 of file validation.h.

◆ GUARDED_BY() [1/2]

bool m_disabled Chainstate::GUARDED_BY ( ::cs_main )

inlineprotected

This toggle exists for use when doing background validation for UTXO snapshots.

In the expected case, it is set once the background validation chain reaches the same height as the base of the snapshot and its UTXO set is found to hash to the expected assumeutxo value. It signals that we should no longer connect blocks to the background chainstate. When set on the background validation chainstate, it signifies that we have fully validated the snapshot chainstate.

In the unlikely case that the snapshot chainstate is found to be invalid, this is set to true on the snapshot chainstate.

Definition at line 746 of file validation.h.

◆ GUARDED_BY() [2/2]

const CBlockIndex *m_avalancheFinalizedBlockIndex Chainstate::GUARDED_BY ( cs_avalancheFinalizedBlockIndex )

protected

The best block via avalanche voting.

This block cannot be reorged in any way except by explicit user action.

◆ HasCoinsViews()

bool Chainstate::HasCoinsViews ( ) const

inline

Does this chainstate have a UTXO set attached?

Definition at line 861 of file validation.h.

◆ InitCoinsDB()

void Chainstate::InitCoinsDB	(	size_t	cache_size_bytes,
		bool	in_memory,
		bool	should_wipe,
		std::string	leveldb_name = `"chainstate"`
	)

Initialize the CoinsViews UTXO set database management data structures.

The in-memory cache is initialized separately.

All parameters forwarded to CoinsViews.

Definition at line 1524 of file validation.cpp.

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◆ InvalidateBlock()

bool Chainstate::InvalidateBlock	(	BlockValidationState &	state,
		CBlockIndex *	pindex
	)

Mark a block as invalid.

Definition at line 3921 of file validation.cpp.

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◆ InvalidBlockFound()

void Chainstate::InvalidBlockFound	(	CBlockIndex *	pindex,
		const BlockValidationState &	state
	)

private

Definition at line 1694 of file validation.cpp.

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◆ InvalidChainFound()

void Chainstate::InvalidChainFound ( CBlockIndex * pindexNew )

private

Definition at line 1660 of file validation.cpp.

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◆ IsBlockAvalancheFinalized()

bool Chainstate::IsBlockAvalancheFinalized ( const CBlockIndex * pindex ) const

Checks if a block is finalized by avalanche voting.

Definition at line 4069 of file validation.cpp.

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◆ IsInitialBlockDownload()

bool Chainstate::IsInitialBlockDownload ( ) const

Check whether we are doing an initial block download (synchronizing from disk or network)

Definition at line 1552 of file validation.cpp.

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◆ LoadChainTip()

bool Chainstate::LoadChainTip ( )

Update the chain tip based on database information, i.e.

CoinsTip()'s best block.

Definition at line 5000 of file validation.cpp.

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◆ LoadExternalBlockFile()

void Chainstate::LoadExternalBlockFile	(	FILE *	fileIn,
		FlatFilePos *	dbp = `nullptr`,
		std::multimap< BlockHash, FlatFilePos > *	blocks_with_unknown_parent = `nullptr`,
		avalanche::Processor *const	avalanche = `nullptr`
	)

Resize the CoinsViews caches dynamically and flush state to disk.

Returns: true unless an error occurred during the flush. Import blocks from an external file

During reindexing, this function is called for each block file (datadir/blocks/blk?????.dat). It reads all blocks contained in the given file and attempts to process them (add them to the block index). The blocks may be out of order within each file and across files. Often this function reads a block but finds that its parent hasn't been read yet, so the block can't be processed yet. The function will add an entry to the blocks_with_unknown_parent map (which is passed as an argument), so that when the block's parent is later read and processed, this function can re-read the child block from disk and process it.

Because a block's parent may be in a later file, not just later in the same file, the blocks_with_unknown_parent map must be passed in and out with each call. It's a multimap, rather than just a map, because multiple blocks may have the same parent (when chain splits or stale blocks exist). It maps from parent-hash to child-disk-position.

This function can also be used to read blocks from user-specified block files using the -loadblock= option. There's no unknown-parent tracking, so the last two arguments are omitted.

Parameters

[in]	fileIn	FILE handle to file containing blocks to read
[in]	dbp	(optional) Disk block position (only for reindex)
[in,out]	blocks_with_unknown_parent	(optional) Map of disk positions for blocks with unknown parent, key is parent block hash (only used for reindex)

Definition at line 5644 of file validation.cpp.

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◆ LoadGenesisBlock()

bool Chainstate::LoadGenesisBlock ( )

Ensures we have a genesis block in the block tree, possibly writing one to disk.

Definition at line 5613 of file validation.cpp.

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◆ LoadMempool()

void Chainstate::LoadMempool	(	const fs::path &	load_path,
		fsbridge::FopenFn	mockable_fopen_function = `fsbridge::fopen`
	)

Load the persisted mempool from disk.

Definition at line 4991 of file validation.cpp.

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◆ LOCKS_EXCLUDED() [1/2]

bool !cs_avalancheFinalizedBlockIndex Chainstate::LOCKS_EXCLUDED ( cs_main )

◆ LOCKS_EXCLUDED() [2/2]

bool !cs_avalancheFinalizedBlockIndex Chainstate::LOCKS_EXCLUDED ( cs_main )

◆ MempoolMutex()

CoinsCacheSizeState GetCoinsCacheSizeState() EXCLUSIVE_LOCKS_REQUIRED(CoinsCacheSizeState GetCoinsCacheSizeState(size_t max_coins_cache_size_bytes, size_t max_mempool_size_bytes) EXCLUSIVE_LOCKS_REQUIRED(std::string ToString() EXCLUSIVE_LOCKS_REQUIRED(RecursiveMutex * Chainstate::MempoolMutex ( ) const -> cs)

inline

Dictates whether we need to flush the cache to disk or not.

Returns: the state of the size of the coins cache. Indirection necessary to make lock annotations work with an optional mempool.

Definition at line 1102 of file validation.h.

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◆ ParkBlock()

bool Chainstate::ParkBlock	(	BlockValidationState &	state,
		CBlockIndex *	pindex
	)

Park a block.

Definition at line 3931 of file validation.cpp.

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◆ PreciousBlock()

bool Chainstate::PreciousBlock	(	BlockValidationState &	state,
		CBlockIndex *	pindex,
		avalanche::Processor *const	avalanche = `nullptr`
	)

Mark a block as precious and reorganize.

May not be called in a validationinterface callback.

Definition at line 3643 of file validation.cpp.

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◆ PruneAndFlush()

void Chainstate::PruneAndFlush ( )

Prune blockfiles from the disk if necessary and then flush chainstate changes if we pruned.

Definition at line 2722 of file validation.cpp.

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◆ PruneBlockIndexCandidates()

void Chainstate::PruneBlockIndexCandidates ( )

Delete all entries in setBlockIndexCandidates that are worse than the current tip.

Definition at line 3256 of file validation.cpp.

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◆ ReceivedBlockTransactions()

void Chainstate::ReceivedBlockTransactions	(	const CBlock &	block,
		CBlockIndex *	pindexNew,
		const FlatFilePos &	pos
	)

private

Mark a block as having its data received and checked (up to BLOCK_VALID_TRANSACTIONS).

Definition at line 4080 of file validation.cpp.

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◆ reliesOnAssumedValid()

bool Chainstate::reliesOnAssumedValid ( )

inline

Return true if this chainstate relies on blocks that are assumed-valid.

In practice this means it was created based on a UTXO snapshot.

Definition at line 820 of file validation.h.

◆ ReplayBlocks()

bool Chainstate::ReplayBlocks ( )

Replay blocks that aren't fully applied to the database.

Definition at line 5265 of file validation.cpp.

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◆ ResetBlockFailureFlags()

void Chainstate::ResetBlockFailureFlags ( CBlockIndex * pindex )

Remove invalidity status from a block and its descendants.

Definition at line 3993 of file validation.cpp.

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◆ ResetCoinsViews()

void Chainstate::ResetCoinsViews ( )

inline

Destructs all objects related to accessing the UTXO set.

Definition at line 858 of file validation.h.

◆ RollforwardBlock()

bool Chainstate::RollforwardBlock	(	const CBlockIndex *	pindex,
		CCoinsViewCache &	inputs
	)

private

Apply the effects of a block on the utxo cache, ignoring that it may already have been applied.

Definition at line 5237 of file validation.cpp.

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◆ UnloadBlockIndex()

void Chainstate::UnloadBlockIndex ( )

Definition at line 5366 of file validation.cpp.

◆ UnparkBlock()

void Chainstate::UnparkBlock ( CBlockIndex * pindex )

Remove parked status from a block.

Definition at line 4030 of file validation.cpp.

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◆ UnparkBlockAndChildren()

void Chainstate::UnparkBlockAndChildren ( CBlockIndex * pindex )

Remove parked status from a block and its descendants.

Definition at line 4026 of file validation.cpp.

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◆ UnparkBlockImpl()

void Chainstate::UnparkBlockImpl	(	CBlockIndex *	pindex,
		bool	fClearChildren
	)

private

Definition at line 4009 of file validation.cpp.

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◆ UnwindBlock()

bool Chainstate::UnwindBlock	(	BlockValidationState &	state,
		CBlockIndex *	pindex,
		bool	invalidate
	)

private

Definition at line 3692 of file validation.cpp.

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◆ UpdateFlags()

template<typename F , typename C , typename AC >

void Chainstate::UpdateFlags	(	CBlockIndex *	pindex,
		CBlockIndex *&	pindexReset,
		F	f,
		C	fChild,
		AC	fAncestorWasChanged
	)

Definition at line 3964 of file validation.cpp.

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◆ UpdateFlagsForBlock()

template<typename F >

bool Chainstate::UpdateFlagsForBlock	(	CBlockIndex *	pindexBase,
		CBlockIndex *	pindex,
		F	f
	)

Definition at line 3941 of file validation.cpp.

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Member Data Documentation

◆ !cs_avalancheFinalizedBlockIndex [1/5]

void Chainstate::!cs_avalancheFinalizedBlockIndex

Definition at line 910 of file validation.h.

◆ !cs_avalancheFinalizedBlockIndex [2/5]

bool Chainstate::!cs_avalancheFinalizedBlockIndex

Definition at line 1003 of file validation.h.

◆ !cs_avalancheFinalizedBlockIndex [3/5]

bool m_mempool Chainstate::!cs_avalancheFinalizedBlockIndex

private

Definition at line 1112 of file validation.h.

◆ !cs_avalancheFinalizedBlockIndex [4/5]

void Chainstate::!cs_avalancheFinalizedBlockIndex

private

Definition at line 1123 of file validation.h.

◆ !cs_avalancheFinalizedBlockIndex [5/5]

CBlockIndex Chainstate::!cs_avalancheFinalizedBlockIndex

private

Definition at line 1127 of file validation.h.

◆ ChainstateManager

util::Result<void> InvalidateCoinsDBOnDisk () EXCLUSIVE_LOCKS_REQUIRED( friend Chainstate::ChainstateManager

private

In case of an invalid snapshot, rename the coins leveldb directory so that it can be examined for issue diagnosis.

Definition at line 1168 of file validation.h.

◆ ConnectBlock

bool Chainstate::ConnectBlock

Apply the effects of this block (with given index) on the UTXO set represented by coins.

Validity checks that depend on the UTXO set are also done; ConnectBlock() can fail if those validity checks fail (among other reasons).

Definition at line 977 of file validation.h.

◆ cs

bool m_mempool Chainstate::cs

Definition at line 986 of file validation.h.

◆ cs_avalancheFinalizedBlockIndex

Mutex Chainstate::cs_avalancheFinalizedBlockIndex

mutableprotected

Definition at line 748 of file validation.h.

◆ m_best_fork_base

CBlockIndex const* Chainstate::m_best_fork_base = nullptr

protected

Definition at line 767 of file validation.h.

◆ m_best_fork_tip

CBlockIndex const* Chainstate::m_best_fork_tip = nullptr

protected

Definition at line 766 of file validation.h.

◆ m_blockman

node::BlockManager& Chainstate::m_blockman

Reference to a BlockManager instance which itself is shared across all Chainstate instances.

Definition at line 772 of file validation.h.

◆ m_cached_finished_ibd

std::atomic<bool> Chainstate::m_cached_finished_ibd {false}

mutableprotected

Whether this chainstate is undergoing initial block download.

Mutable because we need to be able to mark IsInitialBlockDownload() const, which latches this for caching purposes.

Definition at line 724 of file validation.h.

◆ m_chain

CChain Chainstate::m_chain

The current chain of blockheaders we consult and build on.

See also: CChain, CBlockIndex.

Definition at line 808 of file validation.h.

◆ m_chainman

ChainstateManager& Chainstate::m_chainman

The chainstate manager that owns this chainstate.

The reference is necessary so that this instance can check whether it is the active chainstate within deeply nested method calls.

Definition at line 777 of file validation.h.

◆ m_chainstate_mutex

Mutex Chainstate::m_chainstate_mutex

protected

The ChainState Mutex.

A lock that must be held when modifying this ChainState.

Definition at line 705 of file validation.h.

◆ m_coins_views

std::unique_ptr<CoinsViews> Chainstate::m_coins_views

protected

Manages the UTXO set, which is a reflection of the contents of m_chain.

Definition at line 732 of file validation.h.

◆ m_coinsdb_cache_size_bytes

size_t Chainstate::m_coinsdb_cache_size_bytes {0}

The cache size of the on-disk coins view.

Definition at line 864 of file validation.h.

◆ m_coinstip_cache_size_bytes

size_t Chainstate::m_coinstip_cache_size_bytes {0}

The cache size of the in-memory coins view.

Definition at line 867 of file validation.h.

◆ m_filterParkingPoliciesApplied

CRollingBloomFilter Chainstate::m_filterParkingPoliciesApplied

protected

Initial value:

=

CRollingBloomFilter{1000, 0.000001}

CRollingBloomFilter

RollingBloomFilter is a probabilistic "keep track of most recently inserted" set.

Definition bloom.h:115

Filter to prevent parking a block due to block policies more than once.

After first application of block policies, Avalanche voting will determine the final acceptance state. Rare false positives will be reconciled by the network and should not have any negative impact.

Definition at line 763 of file validation.h.

◆ m_from_snapshot_blockhash

const std::optional<BlockHash> Chainstate::m_from_snapshot_blockhash {}

The blockhash which is the base of the snapshot this chainstate was created from.

std::nullopt if this chainstate was not created from a snapshot.

Definition at line 816 of file validation.h.

◆ m_last_flush

std::chrono::microseconds Chainstate::m_last_flush {0}

private

Definition at line 1159 of file validation.h.

◆ m_last_write

void UpdateTip (const CBlockIndex *pindexNew) EXCLUSIVE_LOCKS_REQUIRED( std::chrono::microsecond Chainstate::m_last_write) {0}

private

Check warning conditions and do some notifications on new chain tip set.

Definition at line 1158 of file validation.h.

◆ m_mempool

CTxMemPool* Chainstate::m_mempool

protected

Optional mempool that is kept in sync with the chain.

Only the active chainstate has a mempool.

Definition at line 728 of file validation.h.

◆ nBlockReverseSequenceId

int32_t Chainstate::nBlockReverseSequenceId = -1

protected

Decreasing counter (used by subsequent preciousblock calls).

Definition at line 714 of file validation.h.

◆ nBlockSequenceId

std::atomic<int32_t> Chainstate::nBlockSequenceId {1}

protected

Every received block is assigned a unique and increasing identifier, so we know which one to give priority in case of a fork.

Blocks loaded from disk are assigned id 0, so start the counter at 1.

Definition at line 712 of file validation.h.

◆ nLastPreciousChainwork

arith_uint256 Chainstate::nLastPreciousChainwork = 0

protected

chainwork for the last block that preciousblock has been applied to.

Definition at line 716 of file validation.h.

◆ setBlockIndexCandidates

std::set<CBlockIndex *, CBlockIndexWorkComparator> Chainstate::setBlockIndexCandidates

The set of all CBlockIndex entries with either BLOCK_VALID_TRANSACTIONS (for itself and all ancestors) or BLOCK_ASSUMED_VALID (if using background chainstates) and as good as our current tip or better.

Entries may be failed, though, and pruning nodes may be missing the data for the block.

Definition at line 831 of file validation.h.

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

src/validation.h
src/validation.cpp

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Chainstate()

Member Function Documentation

◆ AcceptBlock()

◆ ActivateBestChain()

◆ ActivateBestChainStep()

◆ AvalancheFinalizeBlock()

◆ CanFlushToDisk()

◆ CheckBlockIndex()

◆ CheckForkWarningConditions()

◆ CheckForkWarningConditionsOnNewFork()

◆ ClearAvalancheFinalizedBlock()

◆ CoinsDB()

◆ CoinsErrorCatcher()

◆ CoinsTip()

◆ ConnectTip()

◆ DisconnectTip()

◆ FindBlockToFinalize()

◆ FindForkInGlobalIndex()

◆ FindMostWorkChain()

◆ FlushStateToDisk()

◆ ForceFlushStateToDisk()

◆ GetMempool()

◆ GUARDED_BY() [1/2]

◆ GUARDED_BY() [2/2]

◆ HasCoinsViews()

◆ InitCoinsDB()

◆ InvalidateBlock()

◆ InvalidBlockFound()

◆ InvalidChainFound()

◆ IsBlockAvalancheFinalized()

◆ IsInitialBlockDownload()

◆ LoadChainTip()

◆ LoadExternalBlockFile()

◆ LoadGenesisBlock()

◆ LoadMempool()

◆ LOCKS_EXCLUDED() [1/2]

◆ LOCKS_EXCLUDED() [2/2]

◆ MempoolMutex()

◆ ParkBlock()

◆ PreciousBlock()

◆ PruneAndFlush()

◆ PruneBlockIndexCandidates()

◆ ReceivedBlockTransactions()

◆ reliesOnAssumedValid()

◆ ReplayBlocks()

◆ ResetBlockFailureFlags()

◆ ResetCoinsViews()

◆ RollforwardBlock()

◆ UnloadBlockIndex()

◆ UnparkBlock()

◆ UnparkBlockAndChildren()

◆ UnparkBlockImpl()

◆ UnwindBlock()

◆ UpdateFlags()

◆ UpdateFlagsForBlock()

Member Data Documentation

◆ !cs_avalancheFinalizedBlockIndex [1/5]

◆ !cs_avalancheFinalizedBlockIndex [2/5]

◆ !cs_avalancheFinalizedBlockIndex [3/5]

◆ !cs_avalancheFinalizedBlockIndex [4/5]

◆ !cs_avalancheFinalizedBlockIndex [5/5]

◆ ChainstateManager

◆ ConnectBlock

◆ cs

◆ cs_avalancheFinalizedBlockIndex

◆ m_best_fork_base

◆ m_best_fork_tip

◆ m_blockman

◆ m_cached_finished_ibd

◆ m_chain

◆ m_chainman

◆ m_chainstate_mutex