#include <arith_uint256.h>
#include <attributes.h>
#include <blockfileinfo.h>
#include <blockindexcomparators.h>
#include <chain.h>
#include <chainparams.h>
#include <common/bloom.h>
#include <config.h>
#include <consensus/amount.h>
#include <consensus/consensus.h>
#include <deploymentstatus.h>
#include <disconnectresult.h>
#include <flatfile.h>
#include <fs.h>
#include <kernel/chainstatemanager_opts.h>
#include <kernel/cs_main.h>
#include <node/blockstorage.h>
#include <policy/packages.h>
#include <script/script_error.h>
#include <script/script_metrics.h>
#include <shutdown.h>
#include <sync.h>
#include <txdb.h>
#include <txmempool.h>
#include <uint256.h>
#include <util/check.h>
#include <util/translation.h>
#include <atomic>
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <thread>
#include <utility>
#include <vector>

Include dependency graph for validation.h:

This graph shows which files directly or indirectly include this file:

Classes
class	BlockValidationOptions

struct	MempoolAcceptResult
	Validation result for a single transaction mempool acceptance. More...

struct	PackageMempoolAcceptResult
	Validation result for package mempool acceptance. More...

class	CheckInputsLimiter
	Simple class for regulating resource usage during CheckInputScripts (and CScriptCheck), atomic so as to be compatible with parallel validation. More...

class	TxSigCheckLimiter

class	CScriptCheck
	Closure representing one script verification. More...

class	CVerifyDB
	RAII wrapper for VerifyDB: Verify consistency of the block and coin databases. More...

class	CoinsViews
	A convenience class for constructing the CCoinsView* hierarchy used to facilitate access to the UTXO set. More...

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

class	ChainstateManager
	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...

Namespaces
	node

	Consensus

Macros
#define	MIN_TRANSACTION_SIZE (::GetSerializeSize(CTransaction(), PROTOCOL_VERSION))

Enumerations
enum class	SynchronizationState { INIT_REINDEX , INIT_DOWNLOAD , POST_INIT }
	Current sync state passed to tip changed callbacks. More...

enum class	VerifyDBResult { SUCCESS , CORRUPTED_BLOCK_DB , INTERRUPTED , SKIPPED_L3_CHECKS , SKIPPED_MISSING_BLOCKS }

enum class	FlushStateMode { NONE , IF_NEEDED , PERIODIC , ALWAYS }

enum class	CoinsCacheSizeState { CRITICAL = 2 , LARGE = 1 , OK = 0 }

enum class	SnapshotCompletionResult { SUCCESS , SKIPPED , MISSING_CHAINPARAMS , STATS_FAILED , HASH_MISMATCH , BASE_BLOCKHASH_MISMATCH }

Functions
void	StartScriptCheckWorkerThreads (int threads_num)
	Run instances of script checking worker threads. More...

void	StopScriptCheckWorkerThreads ()
	Stop all of the script checking worker threads. More...

Amount	GetBlockSubsidy (int nHeight, const Consensus::Params &consensusParams)

bool	AbortNode (BlockValidationState &state, const std::string &strMessage, const bilingual_str &userMessage=bilingual_str{})

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

void	PruneBlockFilesManual (Chainstate &active_chainstate, int nManualPruneHeight)
	Prune block files up to a given height. More...

MempoolAcceptResult	AcceptToMemoryPool (Chainstate &active_chainstate, const CTransactionRef &tx, int64_t accept_time, bool bypass_limits, bool test_accept=false, unsigned int heightOverride=0) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Try to add a transaction to the mempool. More...

PackageMempoolAcceptResult	ProcessNewPackage (Chainstate &active_chainstate, CTxMemPool &pool, const Package &txns, bool test_accept) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Validate (and maybe submit) a package to the mempool. More...

bool	CheckInputScripts (const CTransaction &tx, TxValidationState &state, const CCoinsViewCache &view, const uint32_t flags, bool sigCacheStore, bool scriptCacheStore, const PrecomputedTransactionData &txdata, int &nSigChecksOut, TxSigCheckLimiter &txLimitSigChecks, CheckInputsLimiter pBlockLimitSigChecks, std::vector< CScriptCheck > pvChecks) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Check whether all of this transaction's input scripts succeed. More...

static bool	CheckInputScripts (const CTransaction &tx, TxValidationState &state, const CCoinsViewCache &view, const uint32_t flags, bool sigCacheStore, bool scriptCacheStore, const PrecomputedTransactionData &txdata, int &nSigChecksOut) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Handy shortcut to full fledged CheckInputScripts call. More...

void	SpendCoins (CCoinsViewCache &view, const CTransaction &tx, CTxUndo &txundo, int nHeight)
	Mark all the coins corresponding to a given transaction inputs as spent. More...

void	UpdateCoins (CCoinsViewCache &view, const CTransaction &tx, CTxUndo &txundo, int nHeight)
	Apply the effects of this transaction on the UTXO set represented by view. More...

bool	CheckSequenceLocksAtTip (CBlockIndex tip, const CCoinsView &coins_view, const CTransaction &tx, LockPoints lp=nullptr, bool useExistingLockPoints=false)
	Check if transaction will be BIP68 final in the next block to be created on top of tip. More...

bool	CheckBlock (const CBlock &block, BlockValidationState &state, const Consensus::Params &params, BlockValidationOptions validationOptions)
	Functions for validating blocks and updating the block tree. More...

bool	HasValidProofOfWork (const std::vector< CBlockHeader > &headers, const Consensus::Params &consensusParams)
	Check with the proof of work on each blockheader matches the value in nBits. More...

arith_uint256	CalculateHeadersWork (const std::vector< CBlockHeader > &headers)
	Return the sum of the work on a given set of headers. More...

template<typename DEP >
bool	DeploymentActiveAfter (const CBlockIndex *pindexPrev, const ChainstateManager &chainman, DEP dep)
	Deployment* info via ChainstateManager. More...

template<typename DEP >
bool	DeploymentActiveAt (const CBlockIndex &index, const ChainstateManager &chainman, DEP dep)

const AssumeutxoData *	ExpectedAssumeutxo (const int height, const CChainParams &params)
	Return the expected assumeutxo value for a given height, if one exists. More...

Variables
static const int	MAX_SCRIPTCHECK_THREADS = 15
	Maximum number of dedicated script-checking threads allowed. More...

static const int	DEFAULT_SCRIPTCHECK_THREADS = 0
	-par default (number of script-checking threads, 0 = auto) More...

static const bool	DEFAULT_PEERBLOOMFILTERS = true

static const int	DEFAULT_STOPATHEIGHT = 0
	Default for -stopatheight. More...

static const unsigned int	MIN_BLOCKS_TO_KEEP = 288
	Block files containing a block-height within MIN_BLOCKS_TO_KEEP of ActiveChain().Tip() will not be pruned. More...

static const signed int	DEFAULT_CHECKBLOCKS = 6

static const unsigned int	DEFAULT_CHECKLEVEL = 3

static const uint64_t	MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024
	Require that user allocate at least 550 MiB for block & undo files (blk???.dat and rev???.dat) At 1MB per block, 288 blocks = 288MB. More...

GlobalMutex	g_best_block_mutex

std::condition_variable	g_best_block_cv

uint256	g_best_block
	Used to notify getblocktemplate RPC of new tips. More...

const std::vector< std::string >	CHECKLEVEL_DOC
	Documentation for argument 'checklevel'. More...

bool ContextualCheckTransactionForCurrentBlock(const CBlockIndex *active_chain_tip, const Consensus::Params &params, const CTransaction &tx, TxValidationState &state) EXCLUSIVE_LOCKS_REQUIRED(boo	TestBlockValidity )(BlockValidationState &state, const CChainParams &params, Chainstate &chainstate, const CBlock &block, CBlockIndex *pindexPrev, const std::function< NodeClock::time_point()> &adjusted_time_callback, BlockValidationOptions validationOptions) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	This is a variant of ContextualCheckTransaction which computes the contextual check for a transaction based on the chain tip. More...

Macro Definition Documentation

◆ MIN_TRANSACTION_SIZE

#define MIN_TRANSACTION_SIZE (::GetSerializeSize(CTransaction(), PROTOCOL_VERSION))

Definition at line 78 of file validation.h.

Enumeration Type Documentation

◆ CoinsCacheSizeState

enum CoinsCacheSizeState

strong

Enumerator
CRITICAL	The coins cache is in immediate need of a flush.
LARGE	The cache is at >= 90% capacity.
OK

Definition at line 606 of file validation.h.

◆ FlushStateMode

enum FlushStateMode

strong

See also: Chainstate::FlushStateToDisk

Enumerator
NONE
IF_NEEDED
PERIODIC
ALWAYS

Definition at line 566 of file validation.h.

◆ SnapshotCompletionResult

enum SnapshotCompletionResult

strong

Enumerator
SUCCESS
SKIPPED
MISSING_CHAINPARAMS
STATS_FAILED
HASH_MISMATCH
BASE_BLOCKHASH_MISMATCH

Definition at line 1094 of file validation.h.

◆ SynchronizationState

enum SynchronizationState

strong

Current sync state passed to tip changed callbacks.

Enumerator
INIT_REINDEX
INIT_DOWNLOAD
POST_INIT

Definition at line 113 of file validation.h.

◆ VerifyDBResult

enum VerifyDBResult

strong

Enumerator
SUCCESS
CORRUPTED_BLOCK_DB
INTERRUPTED
SKIPPED_L3_CHECKS
SKIPPED_MISSING_BLOCKS

Definition at line 541 of file validation.h.

Function Documentation

◆ AbortNode()

bool AbortNode	(	BlockValidationState &	state,
		const std::string &	strMessage,
		const bilingual_str &	userMessage = `bilingual_str{}`
	)

Definition at line 1476 of file validation.cpp.

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◆ AcceptToMemoryPool()

MempoolAcceptResult AcceptToMemoryPool	(	Chainstate &	active_chainstate,
		const CTransactionRef &	tx,
		int64_t	accept_time,
		bool	bypass_limits,
		bool	test_accept = `false`,
		unsigned int	heightOverride = `0`
	)

Try to add a transaction to the mempool.

This is an internal function and is exposed only for testing. Client code should use ChainstateManager::ProcessTransaction()

Parameters

[in]	active_chainstate	Reference to the active chainstate.
[in]	tx	The transaction to submit for mempool acceptance.
[in]	accept_time	The timestamp for adding the transaction to the mempool. It is also used to determine when the entry expires.
[in]	bypass_limits	When true, don't enforce mempool fee and capacity limits.
[in]	test_accept	When true, run validation checks but don't submit to mempool.
[in]	heightOverride	Override the block height of the transaction. Used only upon reorg.

Returns: a MempoolAcceptResult indicating whether the transaction was accepted/rejected with reason.

Definition at line 1029 of file validation.cpp.

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◆ CalculateHeadersWork()

arith_uint256 CalculateHeadersWork ( const std::vector< CBlockHeader > & headers )

Return the sum of the work on a given set of headers.

Definition at line 3865 of file validation.cpp.

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◆ CheckBlock()

bool CheckBlock	(	const CBlock &	block,
		BlockValidationState &	state,
		const Consensus::Params &	params,
		BlockValidationOptions	validationOptions
	)

Functions for validating blocks and updating the block tree.

Context-independent validity checks.

Returns true if the provided block is valid (has valid header, transactions are valid, block is a valid size, etc.)

Definition at line 3768 of file validation.cpp.

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◆ CheckInputScripts() [1/2]

static bool CheckInputScripts	(	const CTransaction &	tx,
		TxValidationState &	state,
		const CCoinsViewCache &	view,
		const uint32_t	flags,
		bool	sigCacheStore,
		bool	scriptCacheStore,
		const PrecomputedTransactionData &	txdata,
		int &	nSigChecksOut
	)

inlinestatic

Handy shortcut to full fledged CheckInputScripts call.

Definition at line 398 of file validation.h.

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◆ CheckInputScripts() [2/2]

bool CheckInputScripts	(	const CTransaction &	tx,
		TxValidationState &	state,
		const CCoinsViewCache &	view,
		const uint32_t	flags,
		bool	sigCacheStore,
		bool	scriptCacheStore,
		const PrecomputedTransactionData &	txdata,
		int &	nSigChecksOut,
		TxSigCheckLimiter &	txLimitSigChecks,
		CheckInputsLimiter *	pBlockLimitSigChecks,
		std::vector< CScriptCheck > *	pvChecks
	)

Check whether all of this transaction's input scripts succeed.

This involves ECDSA signature checks so can be computationally intensive. This function should only be called after the cheap sanity checks in CheckTxInputs passed.

If pvChecks is not nullptr, script checks are pushed onto it instead of being performed inline. Any script checks which are not necessary (eg due to script execution cache hits) are, obviously, not pushed onto pvChecks/run.

Upon success nSigChecksOut will be filled in with either:

correct total for all inputs, or,
0, in the case when checks were pushed onto pvChecks (i.e., a cache miss with pvChecks non-null), in which case the total can be found by executing pvChecks and adding the results.

Setting sigCacheStore/scriptCacheStore to false will remove elements from the corresponding cache which are matched. This is useful for checking blocks where we will likely never need the cache entry again.

pLimitSigChecks can be passed to limit the sigchecks count either in parallel or serial validation. With pvChecks null (serial validation), breaking the pLimitSigChecks limit will abort evaluation early and return false. With pvChecks not-null (parallel validation): the cached nSigChecks may itself break the limit in which case false is returned, OR, each entry in the returned pvChecks must be executed exactly once in order to probe the limit accurately.

Definition at line 1371 of file validation.cpp.

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◆ CheckSequenceLocksAtTip()

bool CheckSequenceLocksAtTip	(	CBlockIndex *	tip,
		const CCoinsView &	coins_view,
		const CTransaction &	tx,
		LockPoints *	lp = `nullptr`,
		bool	useExistingLockPoints = `false`
	)

Check if transaction will be BIP68 final in the next block to be created on top of tip.

Parameters

[in]	tip	Chain tip to check tx sequence locks against. For example, the tip of the current active chain.
[in]	coins_view	Any CCoinsView that provides access to the relevant coins for checking sequence locks. For example, it can be a CCoinsViewCache that isn't connected to anything but contains all the relevant coins, or a CCoinsViewMemPool that is connected to the mempool and chainstate UTXO set. In the latter case, the caller is responsible for holding the appropriate locks to ensure that calls to GetCoin() return correct coins. Simulates calling SequenceLocks() with data from the tip passed in. Optionally stores in LockPoints the resulting height and time calculated and the hash of the block needed for calculation or skips the calculation and uses the LockPoints passed in for evaluation. The LockPoints should not be considered valid if CheckSequenceLocksAtTip returns false.

Definition at line 140 of file validation.cpp.

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◆ DeploymentActiveAfter()

template<typename DEP >

bool DeploymentActiveAfter	(	const CBlockIndex *	pindexPrev,
		const ChainstateManager &	chainman,
		DEP	dep
	)

Deployment* info via ChainstateManager.

Definition at line 1483 of file validation.h.

◆ DeploymentActiveAt()

template<typename DEP >

bool DeploymentActiveAt	(	const CBlockIndex &	index,
		const ChainstateManager &	chainman,
		DEP	dep
	)

Definition at line 1489 of file validation.h.

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◆ ExpectedAssumeutxo()

const AssumeutxoData* ExpectedAssumeutxo	(	const int	height,
		const CChainParams &	params
	)

Return the expected assumeutxo value for a given height, if one exists.

Parameters

[in] height Get the assumeutxo value for this height.

Returns: empty if no assumeutxo configuration exists for the given height.

Definition at line 5776 of file validation.cpp.

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◆ GetBlockSubsidy()

Amount GetBlockSubsidy	(	int	nHeight,
		const Consensus::Params &	consensusParams
	)

Definition at line 1103 of file validation.cpp.

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◆ GuessVerificationProgress()

double GuessVerificationProgress	(	const ChainTxData &	data,
		const CBlockIndex *	pindex
	)

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

Definition at line 5724 of file validation.cpp.

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◆ HasValidProofOfWork()

bool HasValidProofOfWork	(	const std::vector< CBlockHeader > &	headers,
		const Consensus::Params &	consensusParams
	)

Check with the proof of work on each blockheader matches the value in nBits.

Definition at line 3856 of file validation.cpp.

◆ ProcessNewPackage()

PackageMempoolAcceptResult ProcessNewPackage	(	Chainstate &	active_chainstate,
		CTxMemPool &	pool,
		const Package &	txns,
		bool	test_accept
	)

Validate (and maybe submit) a package to the mempool.

See doc/policy/packages.md for full detailson package validation rules.

Parameters

[in] test_accept When true, run validation checks but don't submit to mempool.

Returns: a PackageMempoolAcceptResult which includes a MempoolAcceptResult for each transaction. If a transaction fails, validation will exit early and some results may be missing. It is also possible for the package to be partially submitted.

Definition at line 1063 of file validation.cpp.

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◆ PruneBlockFilesManual()

void PruneBlockFilesManual	(	Chainstate &	active_chainstate,
		int	nManualPruneHeight
	)

Prune block files up to a given height.

Definition at line 4575 of file validation.cpp.

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◆ SpendCoins()

void SpendCoins	(	CCoinsViewCache &	view,
		const CTransaction &	tx,
		CTxUndo &	txundo,
		int	nHeight
	)

Mark all the coins corresponding to a given transaction inputs as spent.

Definition at line 1329 of file validation.cpp.

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◆ StartScriptCheckWorkerThreads()

void StartScriptCheckWorkerThreads ( int threads_num )

Run instances of script checking worker threads.

Definition at line 1601 of file validation.cpp.

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◆ StopScriptCheckWorkerThreads()

void StopScriptCheckWorkerThreads ( )

Stop all of the script checking worker threads.

Definition at line 1605 of file validation.cpp.

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◆ UpdateCoins()

void UpdateCoins	(	CCoinsViewCache &	view,
		const CTransaction &	tx,
		CTxUndo &	txundo,
		int	nHeight
	)

Apply the effects of this transaction on the UTXO set represented by view.

Definition at line 1344 of file validation.cpp.

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Variable Documentation

◆ CHECKLEVEL_DOC

const std::vector<std::string> CHECKLEVEL_DOC

extern

Documentation for argument 'checklevel'.

Definition at line 100 of file validation.cpp.

◆ DEFAULT_CHECKBLOCKS

const signed int DEFAULT_CHECKBLOCKS = 6

static

Definition at line 95 of file validation.h.

◆ DEFAULT_CHECKLEVEL

const unsigned int DEFAULT_CHECKLEVEL = 3

static

Definition at line 96 of file validation.h.

◆ DEFAULT_PEERBLOOMFILTERS

const bool DEFAULT_PEERBLOOMFILTERS = true

static

Definition at line 86 of file validation.h.

◆ DEFAULT_SCRIPTCHECK_THREADS

const int DEFAULT_SCRIPTCHECK_THREADS = 0

static

-par default (number of script-checking threads, 0 = auto)

Definition at line 84 of file validation.h.

◆ DEFAULT_STOPATHEIGHT

const int DEFAULT_STOPATHEIGHT = 0

static

Default for -stopatheight.

Definition at line 89 of file validation.h.

◆ g_best_block

uint256 g_best_block

extern

Used to notify getblocktemplate RPC of new tips.

Definition at line 111 of file validation.cpp.

◆ g_best_block_cv

std::condition_variable g_best_block_cv

extern

Definition at line 110 of file validation.cpp.

◆ g_best_block_mutex

GlobalMutex g_best_block_mutex

extern

Definition at line 109 of file validation.cpp.

◆ MAX_SCRIPTCHECK_THREADS

const int MAX_SCRIPTCHECK_THREADS = 15

static

Maximum number of dedicated script-checking threads allowed.

Definition at line 82 of file validation.h.

◆ MIN_BLOCKS_TO_KEEP

const unsigned int MIN_BLOCKS_TO_KEEP = 288

static

Block files containing a block-height within MIN_BLOCKS_TO_KEEP of ActiveChain().Tip() will not be pruned.

Definition at line 94 of file validation.h.

◆ MIN_DISK_SPACE_FOR_BLOCK_FILES

const uint64_t MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024

static

Require that user allocate at least 550 MiB for block & undo files (blk???.dat and rev???.dat) At 1MB per block, 288 blocks = 288MB.

Add 15% for Undo data = 331MB Add 20% for Orphan block rate = 397MB We want the low water mark after pruning to be at least 397 MB and since we prune in full block file chunks, we need the high water mark which triggers the prune to be one 128MB block file + added 15% undo data = 147MB greater for a total of 545MB Setting the target to >= 550 MiB will make it likely we can respect the target.

Definition at line 110 of file validation.h.

◆ TestBlockValidity

bool ContextualCheckTransactionForCurrentBlock ( const CBlockIndex active_chain_tip, const Consensus::Params &params, const CTransaction &tx, TxValidationState &state) EXCLUSIVE_LOCKS_REQUIRED( boo TestBlockValidity) (BlockValidationState &state, const CChainParams &params, Chainstate &chainstate, const CBlock &block, CBlockIndex pindexPrev, const std::function< NodeClock::time_point()> &adjusted_time_callback, BlockValidationOptions validationOptions) EXCLUSIVE_LOCKS_REQUIRED(cs_main)	(	BlockValidationState &	state,
		const CChainParams &	params,
		Chainstate &	chainstate,
		const CBlock &	block,
		CBlockIndex *	pindexPrev,
		const std::function< NodeClock::time_point()> &	adjusted_time_callback,
		BlockValidationOptions	validationOptions
	)

This is a variant of ContextualCheckTransaction which computes the contextual check for a transaction based on the chain tip.

See consensus/consensus.h for flag definitions. Check a block is completely valid from start to finish (only works on top of our current best block)

Definition at line 526 of file validation.h.

Classes

Namespaces

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ MIN_TRANSACTION_SIZE

Enumeration Type Documentation

◆ CoinsCacheSizeState

◆ FlushStateMode

◆ SnapshotCompletionResult

◆ SynchronizationState

◆ VerifyDBResult

Function Documentation

◆ AbortNode()

◆ AcceptToMemoryPool()

◆ CalculateHeadersWork()

◆ CheckBlock()

◆ CheckInputScripts() [1/2]

◆ CheckInputScripts() [2/2]

◆ CheckSequenceLocksAtTip()

◆ DeploymentActiveAfter()

◆ DeploymentActiveAt()

◆ ExpectedAssumeutxo()

◆ GetBlockSubsidy()

◆ GuessVerificationProgress()

◆ HasValidProofOfWork()

◆ ProcessNewPackage()

◆ PruneBlockFilesManual()

◆ SpendCoins()

◆ StartScriptCheckWorkerThreads()

◆ StopScriptCheckWorkerThreads()

◆ UpdateCoins()

Variable Documentation

◆ CHECKLEVEL_DOC

◆ DEFAULT_CHECKBLOCKS

◆ DEFAULT_CHECKLEVEL

◆ DEFAULT_PEERBLOOMFILTERS

◆ DEFAULT_SCRIPTCHECK_THREADS

◆ DEFAULT_STOPATHEIGHT

◆ g_best_block

◆ g_best_block_cv

◆ g_best_block_mutex

◆ MAX_SCRIPTCHECK_THREADS

◆ MIN_BLOCKS_TO_KEEP

◆ MIN_DISK_SPACE_FOR_BLOCK_FILES

◆ TestBlockValidity