#include <arith_uint256.h>
#include <attributes.h>
#include <chain.h>
#include <checkqueue.h>
#include <kernel/chain.h>
#include <consensus/amount.h>
#include <deploymentstatus.h>
#include <kernel/chainparams.h>
#include <kernel/chainstatemanager_opts.h>
#include <kernel/cs_main.h>
#include <node/blockstorage.h>
#include <policy/feerate.h>
#include <policy/packages.h>
#include <policy/policy.h>
#include <script/script_error.h>
#include <sync.h>
#include <txdb.h>
#include <txmempool.h>
#include <uint256.h>
#include <util/check.h>
#include <util/fs.h>
#include <util/hasher.h>
#include <util/result.h>
#include <util/translation.h>
#include <versionbits.h>
#include <atomic>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <stdint.h>
#include <string>
#include <thread>
#include <type_traits>
#include <utility>
#include <vector>

Include dependency graph for validation.h:

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

Classes
struct	MempoolAcceptResult
	Validation result for a transaction evaluated by MemPoolAccept (single or package). More...

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

class	CScriptCheck
	Closure representing one script verification Note that this stores references to the spending transaction. 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
	Transaction validation functions.

	util

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	DisconnectResult { DISCONNECT_OK , DISCONNECT_UNCLEAN , DISCONNECT_FAILED }

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

bool	FatalError (kernel::Notifications &notifications, BlockValidationState &state, const bilingual_str &message)

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) 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, const std::optional< CFeeRate > &client_maxfeerate) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Validate (and maybe submit) a package to the mempool. More...

bool	CheckSequenceLocksAtTip (CBlockIndex *tip, const LockPoints &lock_points)
	Check if transaction will be BIP68 final in the next block to be created on top of tip. More...

bool	InitScriptExecutionCache (size_t max_size_bytes)
	Initializes the script-execution cache. More...

bool	CheckBlock (const CBlock &block, BlockValidationState &state, const Consensus::Params &consensusParams, bool fCheckPOW=true, bool fCheckMerkleRoot=true)
	Functions for validating blocks and updating the block tree. More...

bool	TestBlockValidity (BlockValidationState &state, const CChainParams &chainparams, Chainstate &chainstate, const CBlock &block, CBlockIndex *pindexPrev, bool fCheckPOW=true, bool fCheckMerkleRoot=true) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Check a block is completely valid from start to finish (only works on top of our current best block) 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...

bool	IsBlockMutated (const CBlock &block, bool check_witness_root)
	Check if a block has been mutated (with respect to its merkle root and witness commitments). More...

arith_uint256	CalculateClaimedHeadersWork (const std::vector< CBlockHeader > &headers)
	Return the sum of the claimed 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)

template<typename DEP >
bool	DeploymentEnabled (const ChainstateManager &chainman, DEP dep)

bool	IsBIP30Repeat (const CBlockIndex &block_index)
	Identifies blocks that overwrote an existing coinbase output in the UTXO set (see BIP30) More...

bool	IsBIP30Unspendable (const CBlockIndex &block_index)
	Identifies blocks which coinbase output was subsequently overwritten in the UTXO set (see BIP30) More...

Variables
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 constexpr int	DEFAULT_CHECKLEVEL {3}

static const uint64_t	MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024

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 CheckFinalTxAtTip(const CBlockIndex &active_chain_tip, const CTransaction &tx) EXCLUSIVE_LOCKS_REQUIRED(std::optional< LockPoints >	CalculateLockPointsAtTip (CBlockIndex *tip, const CCoinsView &coins_view, const CTransaction &tx)
	Check if transaction will be final in the next block to be created. More...

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 467 of file validation.h.

◆ DisconnectResult

enum DisconnectResult

Enumerator
DISCONNECT_OK
DISCONNECT_UNCLEAN
DISCONNECT_FAILED

Definition at line 415 of file validation.h.

◆ FlushStateMode

enum FlushStateMode

strong

See also: Chainstate::FlushStateToDisk

Enumerator
NONE
IF_NEEDED
PERIODIC
ALWAYS

Definition at line 425 of file validation.h.

◆ SnapshotCompletionResult

enum SnapshotCompletionResult

strong

Enumerator
SUCCESS
SKIPPED
MISSING_CHAINPARAMS
STATS_FAILED
HASH_MISMATCH
BASE_BLOCKHASH_MISMATCH

Definition at line 801 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 80 of file validation.h.

◆ VerifyDBResult

enum VerifyDBResult

strong

Enumerator
SUCCESS
CORRUPTED_BLOCK_DB
INTERRUPTED
SKIPPED_L3_CHECKS
SKIPPED_MISSING_BLOCKS

Definition at line 390 of file validation.h.

Function Documentation

◆ AcceptToMemoryPool()

MempoolAcceptResult AcceptToMemoryPool	(	Chainstate &	active_chainstate,
		const CTransactionRef &	tx,
		int64_t	accept_time,
		bool	bypass_limits,
		bool	test_accept
	)

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

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

Definition at line 1689 of file validation.cpp.

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◆ CalculateClaimedHeadersWork()

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

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

No verification of PoW is done.

Definition at line 3982 of file validation.cpp.

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◆ CheckBlock()

bool CheckBlock	(	const CBlock &	block,
		BlockValidationState &	state,
		const Consensus::Params &	consensusParams,
		bool	fCheckPOW = `true`,
		bool	fCheckMerkleRoot = `true`
	)

Functions for validating blocks and updating the block tree.

Context-independent validity checks

Definition at line 3841 of file validation.cpp.

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◆ CheckSequenceLocksAtTip()

bool CheckSequenceLocksAtTip	(	CBlockIndex *	tip,
		const LockPoints &	lock_points
	)

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]	lock_points	LockPoints containing the height and time at which this transaction is final. Simulates calling SequenceLocks() with data from the tip passed in. The LockPoints should not be considered valid if CheckSequenceLocksAtTip returns false.

Definition at line 245 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 1282 of file validation.h.

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◆ DeploymentActiveAt()

template<typename DEP >

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

Definition at line 1288 of file validation.h.

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◆ DeploymentEnabled()

template<typename DEP >

bool DeploymentEnabled	(	const ChainstateManager &	chainman,
		DEP	dep
	)

Definition at line 1294 of file validation.h.

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◆ FatalError()

bool FatalError	(	kernel::Notifications &	notifications,
		BlockValidationState &	state,
		const bilingual_str &	message
	)

Definition at line 2056 of file validation.cpp.

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◆ GetBlockSubsidy()

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

Definition at line 1752 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 5372 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 3945 of file validation.cpp.

◆ InitScriptExecutionCache()

bool InitScriptExecutionCache ( size_t max_size_bytes )

Initializes the script-execution cache.

Definition at line 1931 of file validation.cpp.

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◆ IsBIP30Repeat()

bool IsBIP30Repeat ( const CBlockIndex & block_index )

Identifies blocks that overwrote an existing coinbase output in the UTXO set (see BIP30)

Definition at line 6083 of file validation.cpp.

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◆ IsBIP30Unspendable()

bool IsBIP30Unspendable ( const CBlockIndex & block_index )

Identifies blocks which coinbase output was subsequently overwritten in the UTXO set (see BIP30)

Definition at line 6089 of file validation.cpp.

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◆ IsBlockMutated()

bool IsBlockMutated	(	const CBlock &	block,
		bool	check_witness_root
	)

Check if a block has been mutated (with respect to its merkle root and witness commitments).

Definition at line 3951 of file validation.cpp.

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◆ ProcessNewPackage()

PackageMempoolAcceptResult ProcessNewPackage	(	Chainstate &	active_chainstate,
		CTxMemPool &	pool,
		const Package &	txns,
		bool	test_accept,
		const std::optional< CFeeRate > &	client_maxfeerate
	)

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

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

Parameters

[in]	test_accept	When true, run validation checks but don't submit to mempool.
[in]	client_maxfeerate	If exceeded by an individual transaction, rest of (sub)package evaluation is aborted. Only for sanity checks against local submission of transactions.

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 1720 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 4472 of file validation.cpp.

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◆ TestBlockValidity()

bool TestBlockValidity	(	BlockValidationState &	state,
		const CChainParams &	chainparams,
		Chainstate &	chainstate,
		const CBlock &	block,
		CBlockIndex *	pindexPrev,
		bool	fCheckPOW = `true`,
		bool	fCheckMerkleRoot = `true`
	)

Check a block is completely valid from start to finish (only works on top of our current best block)

Definition at line 4433 of file validation.cpp.

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Variable Documentation

◆ CalculateLockPointsAtTip

bool CheckFinalTxAtTip (const CBlockIndex& active_chain_tip, const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED( std::optional<LockPoints> CalculateLockPointsAtTip(CBlockIndex *tip, const CCoinsView &coins_view, const CTransaction &tx)	(	CBlockIndex *	tip,
		const CCoinsView &	coins_view,
		const CTransaction &	tx
	)

Check if transaction will be final in the next block to be created.

Calculate LockPoints required to check if transaction will be BIP68 final in the next block to be created on top of tip.

Parameters

[in]	tip	Chain tip for which tx sequence locks are calculated. 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.
[in]	tx	The transaction being evaluated.

Returns: The resulting height and time calculated and the hash of the block needed for calculation, or std::nullopt if there is an error.

Definition at line 313 of file validation.h.

◆ CHECKLEVEL_DOC

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

extern

Documentation for argument 'checklevel'.

Definition at line 97 of file validation.cpp.

◆ DEFAULT_CHECKBLOCKS

const signed int DEFAULT_CHECKBLOCKS = 6

static

Definition at line 67 of file validation.h.

◆ DEFAULT_CHECKLEVEL

constexpr int DEFAULT_CHECKLEVEL {3}

staticconstexpr

Definition at line 68 of file validation.h.

◆ g_best_block

uint256 g_best_block

extern

Used to notify getblocktemplate RPC of new tips.

Definition at line 114 of file validation.cpp.

◆ g_best_block_cv

std::condition_variable g_best_block_cv

extern

Definition at line 113 of file validation.cpp.

◆ g_best_block_mutex

GlobalMutex g_best_block_mutex

extern

Definition at line 112 of file validation.cpp.

◆ 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 66 of file validation.h.

◆ MIN_DISK_SPACE_FOR_BLOCK_FILES

const uint64_t MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024

static

Definition at line 77 of file validation.h.

Classes

Namespaces

Enumerations

Functions

Variables

Enumeration Type Documentation

◆ CoinsCacheSizeState

◆ DisconnectResult

◆ FlushStateMode

◆ SnapshotCompletionResult

◆ SynchronizationState

◆ VerifyDBResult

Function Documentation

◆ AcceptToMemoryPool()

◆ CalculateClaimedHeadersWork()

◆ CheckBlock()

◆ CheckSequenceLocksAtTip()

◆ DeploymentActiveAfter()

◆ DeploymentActiveAt()

◆ DeploymentEnabled()

◆ FatalError()

◆ GetBlockSubsidy()

◆ GuessVerificationProgress()

◆ HasValidProofOfWork()

◆ InitScriptExecutionCache()

◆ IsBIP30Repeat()

◆ IsBIP30Unspendable()

◆ IsBlockMutated()

◆ ProcessNewPackage()

◆ PruneBlockFilesManual()

◆ TestBlockValidity()

Variable Documentation

◆ CalculateLockPointsAtTip

◆ CHECKLEVEL_DOC

◆ DEFAULT_CHECKBLOCKS

◆ DEFAULT_CHECKLEVEL

◆ g_best_block

◆ g_best_block_cv

◆ g_best_block_mutex

◆ MIN_BLOCKS_TO_KEEP

◆ MIN_DISK_SPACE_FOR_BLOCK_FILES