Provides an interface for creating and interacting with one or two chainstates: an IBD chainstate generated by downloading blocks, and an optional snapshot chainstate loaded from a UTXO snapshot. More...

#include <validation.h>

Inheritance diagram for ChainstateManager:

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Collaboration diagram for ChainstateManager:

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Public Types
using	Options = kernel::ChainstateManagerOpts

Public Member Functions
	ChainstateManager (const util::SignalInterrupt &interrupt, Options options, node::BlockManager::Options blockman_options)

const CChainParams &	GetParams () const

const Consensus::Params &	GetConsensus () const

bool	ShouldCheckBlockIndex () const

const arith_uint256 &	MinimumChainWork () const

const uint256 &	AssumedValidBlock () const

kernel::Notifications &	GetNotifications () const

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

RecursiveMutex &	GetMutex () const LOCK_RETURNED(
	Alias for cs_main. More...

int32_t nBlockSequenceId	GUARDED_BY (::cs_main)
	Every received block is assigned a unique and increasing identifier, so we know which one to give priority in case of a fork. More...

void	ResetBlockSequenceCounters () EXCLUSIVE_LOCKS_REQUIRED(

CBlockIndex *m_best_header	GUARDED_BY (::cs_main)
	Best header we've seen so far for which the block is not known to be invalid (used, among others, for getheaders queries' starting points). More...

util::Result< CBlockIndex * >	ActivateSnapshot (AutoFile &coins_file, const node::SnapshotMetadata &metadata, bool in_memory)
	Construct and activate a Chainstate on the basis of UTXO snapshot data. More...

CChain &	ActiveChain () const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())

int	ActiveHeight () const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())

CBlockIndex *	ActiveTip () const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())

bool	BackgroundSyncInProgress () const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())
	The state of a background sync (for net processing) More...

const CBlockIndex *	GetBackgroundSyncTip () const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())
	The tip of the background sync chain. More...

node::BlockMap &	BlockIndex () EXCLUSIVE_LOCKS_REQUIRED(

bool	IsSnapshotActive () const

std::optional< uint256 >	SnapshotBlockhash () const

bool	IsSnapshotValidated () const EXCLUSIVE_LOCKS_REQUIRED(
	Is there a snapshot in use and has it been fully validated? More...

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

double	GuessVerificationProgress (const CBlockIndex *pindex) const EXCLUSIVE_LOCKS_REQUIRED(GetMutex())
	Guess verification progress (as a fraction between 0.0=genesis and 1.0=current tip). More...

void	LoadExternalBlockFile (AutoFile &file_in, FlatFilePos dbp=nullptr, std::multimap< uint256, FlatFilePos > blocks_with_unknown_parent=nullptr)
	Import blocks from an external file. More...

bool	ProcessNewBlock (const std::shared_ptr< const CBlock > &block, bool force_processing, bool min_pow_checked, bool *new_block) LOCKS_EXCLUDED(cs_main)
	Process an incoming block. More...

bool	ProcessNewBlockHeaders (std::span< const CBlockHeader > headers, bool min_pow_checked, BlockValidationState &state, const CBlockIndex **ppindex=nullptr) LOCKS_EXCLUDED(cs_main)
	Process incoming block headers. More...

bool	AcceptBlock (const std::shared_ptr< const CBlock > &pblock, BlockValidationState &state, CBlockIndex *ppindex, bool fRequested, const FlatFilePos dbp, bool *fNewBlock, bool min_pow_checked) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Sufficiently validate a block for disk storage (and store on disk). More...

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). More...

MempoolAcceptResult	ProcessTransaction (const CTransactionRef &tx, bool test_accept=false) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Try to add a transaction to the memory pool. More...

bool	LoadBlockIndex () EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Load the block tree and coins database from disk, initializing state if we're running with -reindex. More...

void MaybeRebalanceCaches() EXCLUSIVE_LOCKS_REQUIRED(void	UpdateUncommittedBlockStructures (CBlock &block, const CBlockIndex *pindexPrev) const
	Check to see if caches are out of balance and if so, call ResizeCoinsCaches() as needed. More...

std::vector< unsigned char >	GenerateCoinbaseCommitment (CBlock &block, const CBlockIndex *pindexPrev) const
	Produce the necessary coinbase commitment for a block (modifies the hash, don't call for mined blocks). More...

void	ReportHeadersPresync (const arith_uint256 &work, int64_t height, int64_t timestamp)
	This is used by net_processing to report pre-synchronization progress of headers, as headers are not yet fed to validation during that time, but validation is (for now) responsible for logging and signalling through NotifyHeaderTip, so it needs this information. More...

	~ChainstateManager ()

Public Attributes
std::function< void()>	snapshot_download_completed = std::function<void()>()
	Function to restart active indexes; set dynamically to avoid a circular dependency on `base/index.cpp`. More...

const util::SignalInterrupt &	m_interrupt

const Options	m_options

node::BlockManager	m_blockman
	A single BlockManager instance is shared across each constructed chainstate to avoid duplicating block metadata. More...

ValidationCache	m_validation_cache

std::atomic< bool >	m_cached_finished_ibd {false}
	Whether initial block download has ended and IsInitialBlockDownload should return false from now on. More...

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

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

size_t	m_total_coinstip_cache {0}
	The total number of bytes available for us to use across all in-memory coins caches. More...

size_t	m_total_coinsdb_cache {0}
	The total number of bytes available for us to use across all leveldb coins databases. More...

Chainstate &InitializeChainstate(CTxMemPool mempool) EXCLUSIVE_LOCKS_REQUIRED(std::vector< Chainstate	GetAll )()
	Instantiate a new chainstate. More...

SnapshotCompletionResult MaybeCompleteSnapshotValidation() EXCLUSIVE_LOCKS_REQUIRED(const CBlockIndex *GetSnapshotBaseBlock() const EXCLUSIVE_LOCKS_REQUIRED(Chainstate	ActiveChainstate )() const
	Once the background validation chainstate has reached the height which is the base of the UTXO snapshot in use, compare its coins to ensure they match those expected by the snapshot. More...

VersionBitsCache	m_versionbitscache
	Track versionbit status. More...

bool DetectSnapshotChainstate() EXCLUSIVE_LOCKS_REQUIRED(void ResetChainstates() EXCLUSIVE_LOCKS_REQUIRED(bool DeleteSnapshotChainstate() EXCLUSIVE_LOCKS_REQUIRED(Chainstate &ActivateExistingSnapshot(uint256 base_blockhash) EXCLUSIVE_LOCKS_REQUIRED(bool ValidatedSnapshotCleanup() EXCLUSIVE_LOCKS_REQUIRED(Chainstate &GetChainstateForIndexing() EXCLUSIVE_LOCKS_REQUIRED(std::pair< int, int > GetPruneRange(const Chainstate &chainstate, int last_height_can_prune) EXCLUSIVE_LOCKS_REQUIRED(std::optional< int > GetSnapshotBaseHeight() const EXCLUSIVE_LOCKS_REQUIRED(void RecalculateBestHeader() EXCLUSIVE_LOCKS_REQUIRED(CCheckQueue< CScriptCheck > &	GetCheckQueue ()
	When starting up, search the datadir for a chainstate based on a UTXO snapshot that is in the process of being validated. More...

Private Member Functions
std::unique_ptr< Chainstate > m_ibd_chainstate	GUARDED_BY (::cs_main)
	The chainstate used under normal operation (i.e. More...

std::unique_ptr< Chainstate > m_snapshot_chainstate	GUARDED_BY (::cs_main)
	A chainstate initialized on the basis of a UTXO snapshot. More...

Chainstate *m_active_chainstate	GUARDED_BY (::cs_main)
	Points to either the ibd or snapshot chainstate; indicates our most-work chain. More...

CBlockIndex *m_best_invalid	GUARDED_BY (::cs_main)

CBlockIndex *m_last_notified_header	GUARDED_BY (GetMutex())
	The last header for which a headerTip notification was issued. More...

bool	NotifyHeaderTip () LOCKS_EXCLUDED(GetMutex())

util::Result< void >	PopulateAndValidateSnapshot (Chainstate &snapshot_chainstate, AutoFile &coins_file, const node::SnapshotMetadata &metadata)
	Internal helper for ActivateSnapshot(). More...

bool	AcceptBlockHeader (const CBlockHeader &block, BlockValidationState &state, CBlockIndex **ppindex, bool min_pow_checked) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	If a block header hasn't already been seen, call CheckBlockHeader on it, ensure that it doesn't descend from an invalid block, and then add it to m_block_index. More...

MockableSteadyClock::time_point m_last_presync_update	GUARDED_BY (GetMutex())
	Most recent headers presync progress update, for rate-limiting. More...

bool	IsUsable (const Chainstate *const cs) const EXCLUSIVE_LOCKS_REQUIRED(
	Return true if a chainstate is considered usable. More...

SteadyClock::duration	GUARDED_BY (::cs_main) time_check
	Timers and counters used for benchmarking validation in both background and active chainstates. More...

SteadyClock::duration	GUARDED_BY (::cs_main) time_forks

SteadyClock::duration	GUARDED_BY (::cs_main) time_connect

SteadyClock::duration	GUARDED_BY (::cs_main) time_verify

SteadyClock::duration	GUARDED_BY (::cs_main) time_undo

SteadyClock::duration	GUARDED_BY (::cs_main) time_index

SteadyClock::duration	GUARDED_BY (::cs_main) time_total

int64_t	GUARDED_BY (::cs_main) num_blocks_total

SteadyClock::duration	GUARDED_BY (::cs_main) time_connect_total

SteadyClock::duration	GUARDED_BY (::cs_main) time_flush

SteadyClock::duration	GUARDED_BY (::cs_main) time_chainstate

SteadyClock::duration	GUARDED_BY (::cs_main) time_post_connect

Private Attributes
friend	Chainstate

CCheckQueue< CScriptCheck >	m_script_check_queue
	A queue for script verifications that have to be performed by worker threads. More...

Detailed Description

Provides an interface for creating and interacting with one or two chainstates: an IBD chainstate generated by downloading blocks, and an optional snapshot chainstate loaded from a UTXO snapshot.

Managed chainstates can be maintained at different heights simultaneously.

This class provides abstractions that allow the retrieval of the current most-work chainstate ("Active") as well as chainstates which may be in background use to validate UTXO snapshots.

Definitions:

IBD chainstate: a chainstate whose current state has been "fully" validated by the initial block download process.

Snapshot chainstate: a chainstate populated by loading in an assumeutxo UTXO snapshot.

Active chainstate: the chainstate containing the current most-work chain. Consulted by most parts of the system (net_processing, wallet) as a reflection of the current chain and UTXO set. This may either be an IBD chainstate or a snapshot chainstate.

Background IBD chainstate: an IBD chainstate for which the IBD process is happening in the background while use of the active (snapshot) chainstate allows the rest of the system to function.

Definition at line 866 of file validation.h.

Member Typedef Documentation

◆ Options

using ChainstateManager::Options = kernel::ChainstateManagerOpts

Definition at line 967 of file validation.h.

Constructor & Destructor Documentation

◆ ChainstateManager()

ChainstateManager::ChainstateManager	(	const util::SignalInterrupt &	interrupt,
		Options	options,
		node::BlockManager::Options	blockman_options
	)

explicit

Definition at line 6275 of file validation.cpp.

◆ ~ChainstateManager()

ChainstateManager::~ChainstateManager ( )

Definition at line 6284 of file validation.cpp.

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Member Function Documentation

◆ AcceptBlock()

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

Sufficiently validate a block for disk storage (and store on disk).

Store block on disk.

Parameters

[in]	pblock	The block we want to process.
[in]	fRequested	Whether we requested this block from a peer.
[in]	dbp	The location on disk, if we are importing this block from prior storage.
[in]	min_pow_checked	True if proof-of-work anti-DoS checks have been done by caller for headers chain
[out]	state	The state of the block validation.
[out]	ppindex	Optional return parameter to get the CBlockIndex pointer for this block.
[out]	fNewBlock	Optional return parameter to indicate if the block is new to our storage.

Returns: False if the block or header is invalid, or if saving to disk fails (likely a fatal error); true otherwise.

If dbp is non-nullptr, the file is known to already reside on disk

Definition at line 4439 of file validation.cpp.

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◆ AcceptBlockHeader()

bool ChainstateManager::AcceptBlockHeader	(	const CBlockHeader &	block,
		BlockValidationState &	state,
		CBlockIndex **	ppindex,
		bool	min_pow_checked
	)

private

If a block header hasn't already been seen, call CheckBlockHeader on it, ensure that it doesn't descend from an invalid block, and then add it to m_block_index.

Caller must set min_pow_checked=true in order to add a new header to the block index (permanent memory storage), indicating that the header is known to be part of a sufficiently high-work chain (anti-dos check).

Definition at line 4328 of file validation.cpp.

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◆ ActivateSnapshot()

util::Result< CBlockIndex * > ChainstateManager::ActivateSnapshot	(	AutoFile &	coins_file,
		const node::SnapshotMetadata &	metadata,
		bool	in_memory
	)

Construct and activate a Chainstate on the basis of UTXO snapshot data.

Steps:

Initialize an unused Chainstate.
Load its CoinsViews contents from coins_file.
Verify that the hash of the resulting coinsdb matches the expected hash per assumeutxo chain parameters.
Wait for our headers chain to include the base block of the snapshot.
"Fast forward" the tip of the new chainstate to the base of the snapshot.
Move the new chainstate to m_snapshot_chainstate and make it our ChainstateActive().

Definition at line 5682 of file validation.cpp.

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◆ ActiveChain()

CChain & ChainstateManager::ActiveChain ( ) const

inline

Definition at line 1092 of file validation.h.

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◆ ActiveHeight()

int ChainstateManager::ActiveHeight ( ) const

inline

Definition at line 1093 of file validation.h.

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◆ ActiveTip()

CBlockIndex * ChainstateManager::ActiveTip ( ) const

inline

Definition at line 1094 of file validation.h.

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◆ AssumedValidBlock()

const uint256 & ChainstateManager::AssumedValidBlock ( ) const

inline

Definition at line 979 of file validation.h.

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◆ BackgroundSyncInProgress()

bool ChainstateManager::BackgroundSyncInProgress ( ) const

inline

The state of a background sync (for net processing)

Definition at line 1097 of file validation.h.

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◆ BlockIndex()

node::BlockMap & ChainstateManager::BlockIndex ( )

inline

Definition at line 1106 of file validation.h.

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◆ CheckBlockIndex()

void ChainstateManager::CheckBlockIndex ( ) const

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 5215 of file validation.cpp.

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◆ GenerateCoinbaseCommitment()

std::vector< unsigned char > ChainstateManager::GenerateCoinbaseCommitment	(	CBlock &	block,
		const CBlockIndex *	pindexPrev
	)		const

Produce the necessary coinbase commitment for a block (modifies the hash, don't call for mined blocks).

Definition at line 4135 of file validation.cpp.

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◆ GetBackgroundSyncTip()

const CBlockIndex * ChainstateManager::GetBackgroundSyncTip ( ) const

inline

The tip of the background sync chain.

Definition at line 1102 of file validation.h.

◆ GetConsensus()

const Consensus::Params & ChainstateManager::GetConsensus ( ) const

inline

Definition at line 976 of file validation.h.

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◆ GetMutex()

RecursiveMutex & ChainstateManager::GetMutex ( ) const

inline

Alias for cs_main.

Should be used in new code to make it easier to make cs_main a member of this class. Generally, methods of this class should be annotated to require this mutex. This will make calling code more verbose, but also help to:

Clarify that the method will acquire a mutex that heavily affects overall performance.
Force call sites to think how long they need to acquire the mutex to get consistent results.

Definition at line 1000 of file validation.h.

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◆ GetNotifications()

kernel::Notifications & ChainstateManager::GetNotifications ( ) const

inline

Definition at line 980 of file validation.h.

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◆ GetParams()

const CChainParams & ChainstateManager::GetParams ( ) const

inline

Definition at line 975 of file validation.h.

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◆ GUARDED_BY() [1/20]

std::unique_ptr< Chainstate > m_ibd_chainstate ChainstateManager::GUARDED_BY ( ::cs_main )

private

The chainstate used under normal operation (i.e.

"regular" IBD) or, if a snapshot is in use, for background validation.

Its contents (including on-disk data) will be deleted upon shutdown after background validation of the snapshot has completed. We do not free the chainstate contents immediately after it finishes validation to cautiously avoid a case where some other part of the system is still using this pointer (e.g. net_processing).

Once this pointer is set to a corresponding chainstate, it will not be reset until init.cpp:Shutdown().

It is important for the pointer to not be deleted until shutdown, because cs_main is not always held when the pointer is accessed, for example when calling ActivateBestChain, so there's no way you could prevent code from using the pointer while deleting it.

◆ GUARDED_BY() [2/20]

std::unique_ptr< Chainstate > m_snapshot_chainstate ChainstateManager::GUARDED_BY ( ::cs_main )

private

A chainstate initialized on the basis of a UTXO snapshot.

If this is non-null, it is always our active chainstate.

Once this pointer is set to a corresponding chainstate, it will not be reset until init.cpp:Shutdown().

It is important for the pointer to not be deleted until shutdown, because cs_main is not always held when the pointer is accessed, for example when calling ActivateBestChain, so there's no way you could prevent code from using the pointer while deleting it.

◆ GUARDED_BY() [3/20]

Chainstate *m_active_chainstate ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Points to either the ibd or snapshot chainstate; indicates our most-work chain.

Definition at line 901 of file validation.h.

◆ GUARDED_BY() [4/20]

CBlockIndex *m_best_invalid ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 903 of file validation.h.

◆ GUARDED_BY() [5/20]

int32_t nBlockSequenceId ChainstateManager::GUARDED_BY ( ::cs_main )

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.

◆ GUARDED_BY() [6/20]

CBlockIndex *m_best_header ChainstateManager::GUARDED_BY ( ::cs_main )

inline

Best header we've seen so far for which the block is not known to be invalid (used, among others, for getheaders queries' starting points).

In case of multiple best headers with the same work, it could point to any because CBlockIndexWorkComparator tiebreaker rules are not applied.

Definition at line 1044 of file validation.h.

◆ GUARDED_BY() [7/20]

int64_t ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 960 of file validation.h.

◆ GUARDED_BY() [8/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 963 of file validation.h.

◆ GUARDED_BY() [9/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Timers and counters used for benchmarking validation in both background and active chainstates.

Definition at line 953 of file validation.h.

◆ GUARDED_BY() [10/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 955 of file validation.h.

◆ GUARDED_BY() [11/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 961 of file validation.h.

◆ GUARDED_BY() [12/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 962 of file validation.h.

◆ GUARDED_BY() [13/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 954 of file validation.h.

◆ GUARDED_BY() [14/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 958 of file validation.h.

◆ GUARDED_BY() [15/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 964 of file validation.h.

◆ GUARDED_BY() [16/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 959 of file validation.h.

◆ GUARDED_BY() [17/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 957 of file validation.h.

◆ GUARDED_BY() [18/20]

SteadyClock::duration ChainstateManager::GUARDED_BY ( ::cs_main )

inlineprivate

Definition at line 956 of file validation.h.

◆ GUARDED_BY() [19/20]

CBlockIndex *m_last_notified_header ChainstateManager::GUARDED_BY ( GetMutex() )

inlineprivate

The last header for which a headerTip notification was issued.

Definition at line 906 of file validation.h.

◆ GUARDED_BY() [20/20]

MockableSteadyClock::time_point m_last_presync_update ChainstateManager::GUARDED_BY ( GetMutex() )

inlineprivate

Most recent headers presync progress update, for rate-limiting.

Definition at line 937 of file validation.h.

◆ GuessVerificationProgress()

double ChainstateManager::GuessVerificationProgress ( const CBlockIndex * pindex ) const

Guess verification progress (as a fraction between 0.0=genesis and 1.0=current tip).

Definition at line 5572 of file validation.cpp.

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◆ IsInitialBlockDownload()

bool ChainstateManager::IsInitialBlockDownload ( ) const

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

Definition at line 2018 of file validation.cpp.

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◆ IsSnapshotActive()

bool ChainstateManager::IsSnapshotActive ( ) const

Returns: true if a snapshot-based chainstate is in use. Also implies that a background validation chainstate is also in use.

Definition at line 6213 of file validation.cpp.

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◆ IsSnapshotValidated()

bool ChainstateManager::IsSnapshotValidated ( ) const

inline

Is there a snapshot in use and has it been fully validated?

Definition at line 1124 of file validation.h.

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◆ IsUsable()

bool ChainstateManager::IsUsable ( const Chainstate *const cs ) const

inlineprivate

Return true if a chainstate is considered usable.

This is false when a background validation chainstate has completed its validation of an assumed-valid chainstate, or when a snapshot chainstate has been found to be invalid.

Definition at line 944 of file validation.h.

◆ LoadBlockIndex()

bool ChainstateManager::LoadBlockIndex ( )

Load the block tree and coins database from disk, initializing state if we're running with -reindex.

Definition at line 4961 of file validation.cpp.

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◆ LoadExternalBlockFile()

void ChainstateManager::LoadExternalBlockFile	(	AutoFile &	file_in,
		FlatFilePos *	dbp = `nullptr`,
		std::multimap< uint256, FlatFilePos > *	blocks_with_unknown_parent = `nullptr`
	)

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]	file_in	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 5030 of file validation.cpp.

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◆ MinimumChainWork()

const arith_uint256 & ChainstateManager::MinimumChainWork ( ) const

inline

Definition at line 978 of file validation.h.

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◆ NotifyHeaderTip()

bool ChainstateManager::NotifyHeaderTip ( )

private

Definition at line 3419 of file validation.cpp.

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◆ PopulateAndValidateSnapshot()

util::Result< void > ChainstateManager::PopulateAndValidateSnapshot	(	Chainstate &	snapshot_chainstate,
		AutoFile &	coins_file,
		const node::SnapshotMetadata &	metadata
	)

private

Internal helper for ActivateSnapshot().

De-serialization of a snapshot that is created with the dumptxoutset RPC. To reduce space the serialization format of the snapshot avoids duplication of tx hashes. The code takes advantage of the guarantee by leveldb that keys are lexicographically sorted.

Definition at line 5858 of file validation.cpp.

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◆ ProcessNewBlock()

bool ChainstateManager::ProcessNewBlock	(	const std::shared_ptr< const CBlock > &	block,
		bool	force_processing,
		bool	min_pow_checked,
		bool *	new_block
	)

Process an incoming block.

This only returns after the best known valid block is made active. Note that it does not, however, guarantee that the specific block passed to it has been checked for validity!

If you want to possibly get feedback on whether block is valid, you must install a CValidationInterface (see validationinterface.h) - this will have its BlockChecked method called whenever any block completes validation.

Note that we guarantee that either the proof-of-work is valid on block, or (and possibly also) BlockChecked will have been called.

May not be called in a validationinterface callback.

Parameters

[in]	block	The block we want to process.
[in]	force_processing	Process this block even if unrequested; used for non-network block sources.
[in]	min_pow_checked	True if proof-of-work anti-DoS checks have been done by caller for headers chain (note: only affects headers acceptance; if block header is already present in block index then this parameter has no effect)
[out]	new_block	A boolean which is set to indicate if the block was first received via this call

Returns: If the block was processed, independently of block validity

Definition at line 4539 of file validation.cpp.

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◆ ProcessNewBlockHeaders()

bool ChainstateManager::ProcessNewBlockHeaders	(	std::span< const CBlockHeader >	headers,
		bool	min_pow_checked,
		BlockValidationState &	state,
		const CBlockIndex **	ppindex = `nullptr`
	)

Process incoming block headers.

May not be called in a validationinterface callback.

Parameters

[in]	headers	The block headers themselves
[in]	min_pow_checked	True if proof-of-work anti-DoS checks have been done by caller for headers chain
[out]	state	This may be set to an Error state if any error occurred processing them
[out]	ppindex	If set, the pointer will be set to point to the last new block index object for the given headers

Returns: false if AcceptBlockHeader fails on any of the headers, true otherwise (including if headers were already known)

Definition at line 4383 of file validation.cpp.

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◆ ProcessTransaction()

MempoolAcceptResult ChainstateManager::ProcessTransaction	(	const CTransactionRef &	tx,
		bool	test_accept = `false`
	)

Try to add a transaction to the memory pool.

Parameters

[in]	tx	The transaction to submit for mempool acceptance.
[in]	test_accept	When true, run validation checks but don't submit to mempool.

Definition at line 4589 of file validation.cpp.

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◆ ReceivedBlockTransactions()

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

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

Definition at line 3903 of file validation.cpp.

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◆ ReportHeadersPresync()

void ChainstateManager::ReportHeadersPresync	(	const arith_uint256 &	work,
		int64_t	height,
		int64_t	timestamp
	)

This is used by net_processing to report pre-synchronization progress of headers, as headers are not yet fed to validation during that time, but validation is (for now) responsible for logging and signalling through NotifyHeaderTip, so it needs this information.

Definition at line 4413 of file validation.cpp.

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◆ ResetBlockSequenceCounters()

void ChainstateManager::ResetBlockSequenceCounters ( )

inline

Definition at line 1032 of file validation.h.

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◆ ShouldCheckBlockIndex()

bool ChainstateManager::ShouldCheckBlockIndex ( ) const

Definition at line 5207 of file validation.cpp.

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◆ SnapshotBlockhash()

std::optional< uint256 > ChainstateManager::SnapshotBlockhash ( ) const

Definition at line 5609 of file validation.cpp.

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◆ UpdateUncommittedBlockStructures()

void ChainstateManager::UpdateUncommittedBlockStructures	(	CBlock &	block,
		const CBlockIndex *	pindexPrev
	)		const

Check to see if caches are out of balance and if so, call ResizeCoinsCaches() as needed.

Update uncommitted block structures (currently: only the witness reserved value). This is safe for submitted blocks.

Definition at line 4123 of file validation.cpp.

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Member Data Documentation

◆ ActiveChainstate

Chainstate & ChainstateManager::ActiveChainstate

Once the background validation chainstate has reached the height which is the base of the UTXO snapshot in use, compare its coins to ensure they match those expected by the snapshot.

If the coins match (expected), then mark the validation chainstate for deletion and continue using the snapshot chainstate as active. Otherwise, revert to using the ibd chainstate and shutdown. Returns nullptr if no snapshot has been loaded. The most-work chain.

Definition at line 1091 of file validation.h.

◆ Chainstate

friend ChainstateManager::Chainstate

private

Definition at line 934 of file validation.h.

◆ GetAll

std::vector< Chainstate * > ChainstateManager::GetAll

Instantiate a new chainstate.

Parameters

[in] mempool The mempool to pass to the chainstate Get all chainstates currently being used.

Definition at line 1061 of file validation.h.

◆ GetCheckQueue

bool DetectSnapshotChainstate() EXCLUSIVE_LOCKS_REQUIRED(void ResetChainstates() EXCLUSIVE_LOCKS_REQUIRED(bool DeleteSnapshotChainstate() EXCLUSIVE_LOCKS_REQUIRED(Chainstate &ActivateExistingSnapshot(uint256 base_blockhash) EXCLUSIVE_LOCKS_REQUIRED(bool ValidatedSnapshotCleanup() EXCLUSIVE_LOCKS_REQUIRED(Chainstate &GetChainstateForIndexing() EXCLUSIVE_LOCKS_REQUIRED(std::pair< int, int > GetPruneRange(const Chainstate &chainstate, int last_height_can_prune) EXCLUSIVE_LOCKS_REQUIRED(std::optional< int > GetSnapshotBaseHeight() const EXCLUSIVE_LOCKS_REQUIRED(void RecalculateBestHeader() EXCLUSIVE_LOCKS_REQUIRED(CCheckQueue< CScriptCheck > & ChainstateManager::GetCheckQueue()

inline

When starting up, search the datadir for a chainstate based on a UTXO snapshot that is in the process of being validated.

Remove the snapshot-based chainstate and all on-disk artifacts. Used when reindex{-chainstate} is called during snapshot use. Switch the active chainstate to one based on a UTXO snapshot that was loaded previously. If we have validated a snapshot chain during this runtime, copy its chainstate directory over to the main chainstate location, completing validation of the snapshot.

If the cleanup succeeds, the caller will need to ensure chainstates are reinitialized, since ResetChainstates() will be called before leveldb directories are moved or deleted.

See also: node/chainstate:LoadChainstate()

Returns: the chainstate that indexes should consult when ensuring that an index is synced with a chain where we can expect block index entries to have BLOCK_HAVE_DATA beneath the tip.

In other words, give us the chainstate for which we can reasonably expect that all blocks beneath the tip have been indexed. In practice this means when using an assumed-valid chainstate based upon a snapshot, return only the fully validated chain. Return the [start, end] (inclusive) of block heights we can prune.

start > end is possible, meaning no blocks can be pruned. Return the height of the base block of the snapshot in use, if one exists, else nullopt. If, due to invalidation / reconsideration of blocks, the previous best header is no longer valid / guaranteed to be the most-work header in our block-index not known to be invalid, recalculate it.

Definition at line 1307 of file validation.h.

◆ m_blockman

node::BlockManager ChainstateManager::m_blockman

A single BlockManager instance is shared across each constructed chainstate to avoid duplicating block metadata.

Definition at line 1006 of file validation.h.

◆ m_cached_finished_ibd

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

mutable

Whether initial block download has ended and IsInitialBlockDownload should return false from now on.

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

Definition at line 1017 of file validation.h.

◆ m_interrupt

const util::SignalInterrupt& ChainstateManager::m_interrupt

Definition at line 1002 of file validation.h.

◆ m_options

const Options ChainstateManager::m_options

Definition at line 1003 of file validation.h.

◆ m_script_check_queue

CCheckQueue<CScriptCheck> ChainstateManager::m_script_check_queue

private

A queue for script verifications that have to be performed by worker threads.

Definition at line 949 of file validation.h.

◆ m_total_coinsdb_cache

size_t ChainstateManager::m_total_coinsdb_cache {0}

The total number of bytes available for us to use across all leveldb coins databases.

This will be split somehow across chainstates.

Definition at line 1052 of file validation.h.

◆ m_total_coinstip_cache

size_t ChainstateManager::m_total_coinstip_cache {0}

The total number of bytes available for us to use across all in-memory coins caches.

This will be split somehow across chainstates.

Definition at line 1048 of file validation.h.

◆ m_validation_cache

ValidationCache ChainstateManager::m_validation_cache

Definition at line 1008 of file validation.h.

◆ m_versionbitscache

VersionBitsCache ChainstateManager::m_versionbitscache

mutable

Track versionbit status.

Definition at line 1115 of file validation.h.

◆ nBlockReverseSequenceId

int32_t ChainstateManager::nBlockReverseSequenceId = -1

Decreasing counter (used by subsequent preciousblock calls).

Definition at line 1026 of file validation.h.

◆ nLastPreciousChainwork

arith_uint256 ChainstateManager::nLastPreciousChainwork = 0

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

Definition at line 1028 of file validation.h.

◆ snapshot_download_completed

std::function<void()> ChainstateManager::snapshot_download_completed = std::function<void()>()

Function to restart active indexes; set dynamically to avoid a circular dependency on base/index.cpp.

Definition at line 973 of file validation.h.

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

src/validation.h
src/validation.cpp

Public Types

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ Options

Constructor & Destructor Documentation

◆ ChainstateManager()

◆ ~ChainstateManager()

Member Function Documentation

◆ AcceptBlock()

◆ AcceptBlockHeader()

◆ ActivateSnapshot()

◆ ActiveChain()

◆ ActiveHeight()

◆ ActiveTip()

◆ AssumedValidBlock()

◆ BackgroundSyncInProgress()

◆ BlockIndex()

◆ CheckBlockIndex()

◆ GenerateCoinbaseCommitment()

◆ GetBackgroundSyncTip()

◆ GetConsensus()

◆ GetMutex()

◆ GetNotifications()

◆ GetParams()

◆ GUARDED_BY() [1/20]

◆ GUARDED_BY() [2/20]

◆ GUARDED_BY() [3/20]

◆ GUARDED_BY() [4/20]

◆ GUARDED_BY() [5/20]

◆ GUARDED_BY() [6/20]

◆ GUARDED_BY() [7/20]

◆ GUARDED_BY() [8/20]

◆ GUARDED_BY() [9/20]

◆ GUARDED_BY() [10/20]

◆ GUARDED_BY() [11/20]

◆ GUARDED_BY() [12/20]

◆ GUARDED_BY() [13/20]

◆ GUARDED_BY() [14/20]

◆ GUARDED_BY() [15/20]

◆ GUARDED_BY() [16/20]

◆ GUARDED_BY() [17/20]

◆ GUARDED_BY() [18/20]

◆ GUARDED_BY() [19/20]

◆ GUARDED_BY() [20/20]

◆ GuessVerificationProgress()

◆ IsInitialBlockDownload()

◆ IsSnapshotActive()

◆ IsSnapshotValidated()

◆ IsUsable()

◆ LoadBlockIndex()

◆ LoadExternalBlockFile()

◆ MinimumChainWork()

◆ NotifyHeaderTip()

◆ PopulateAndValidateSnapshot()

◆ ProcessNewBlock()

◆ ProcessNewBlockHeaders()

◆ ProcessTransaction()

◆ ReceivedBlockTransactions()

◆ ReportHeadersPresync()

◆ ResetBlockSequenceCounters()

◆ ShouldCheckBlockIndex()

◆ SnapshotBlockhash()

◆ UpdateUncommittedBlockStructures()

Member Data Documentation

◆ ActiveChainstate

◆ Chainstate

◆ GetAll

◆ GetCheckQueue

◆ m_blockman

◆ m_cached_finished_ibd

◆ m_interrupt

◆ m_options

◆ m_script_check_queue

◆ m_total_coinsdb_cache

◆ m_total_coinstip_cache

◆ m_validation_cache