#include <validation.h>
#include <arith_uint256.h>
#include <chain.h>
#include <chainparams.h>
#include <checkqueue.h>
#include <consensus/consensus.h>
#include <consensus/merkle.h>
#include <consensus/tx_check.h>
#include <consensus/tx_verify.h>
#include <consensus/validation.h>
#include <cuckoocache.h>
#include <flatfile.h>
#include <hash.h>
#include <index/txindex.h>
#include <logging.h>
#include <logging/timer.h>
#include <node/ui_interface.h>
#include <optional.h>
#include <policy/fees.h>
#include <policy/policy.h>
#include <policy/settings.h>
#include <pow.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <random.h>
#include <reverse_iterator.h>
#include <script/script.h>
#include <script/sigcache.h>
#include <shutdown.h>
#include <signet.h>
#include <timedata.h>
#include <tinyformat.h>
#include <txdb.h>
#include <txmempool.h>
#include <uint256.h>
#include <undo.h>
#include <util/check.h>
#include <util/moneystr.h>
#include <util/rbf.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <util/translation.h>
#include <validationinterface.h>
#include <warnings.h>
#include <string>
#include <boost/algorithm/string/replace.hpp>

Include dependency graph for validation.cpp:

Classes
class	WarningBitsConditionChecker
	Threshold condition checker that triggers when unknown versionbits are seen on the network. More...

struct	PerBlockConnectTrace

class	ConnectTrace
	Used to track blocks whose transactions were applied to the UTXO state as a part of a single ActivateBestChainStep call. More...

Macros
#define	MICRO 0.000001

#define	MILLI 0.001

Functions
CChainState &	ChainstateActive ()
	Please prefer the identical ChainstateManager::ActiveChainstate. More...

CChain &	ChainActive ()
	Please prefer the identical ChainstateManager::ActiveChain. More...

std::atomic_bool	fImporting (false)

std::atomic_bool	fReindex (false)

CBlockIndex *	LookupBlockIndex (const uint256 &hash)

CBlockIndex *	FindForkInGlobalIndex (const CChain &chain, const CBlockLocator &locator)
	Find the last common block between the parameter chain and a locator. More...

bool	CheckInputScripts (const CTransaction &tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData &txdata, std::vector< CScriptCheck > *pvChecks) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Check whether all of this transaction's input scripts succeed. More...

static FILE *	OpenUndoFile (const FlatFilePos &pos, bool fReadOnly)
	Open an undo file (rev?????.dat) More...

static FlatFileSeq	BlockFileSeq ()

static FlatFileSeq	UndoFileSeq ()

bool	CheckFinalTx (const CTransaction &tx, int flags)
	Transaction validation functions. More...

bool	TestLockPointValidity (const LockPoints *lp)
	Test whether the LockPoints height and time are still valid on the current chain. More...

bool	CheckSequenceLocks (const CTxMemPool &pool, const CTransaction &tx, int flags, LockPoints *lp, bool useExistingLockPoints)

static unsigned int	GetBlockScriptFlags (const CBlockIndex *pindex, const Consensus::Params &chainparams)

static void	LimitMempoolSize (CTxMemPool &pool, size_t limit, std::chrono::seconds age) EXCLUSIVE_LOCKS_REQUIRED(pool.cs

	if (expired!=0)

pool	TrimToSize (limit,&vNoSpendsRemaining)

static void	UpdateMempoolForReorg (CTxMemPool &mempool, DisconnectedBlockTransactions &disconnectpool, bool fAddToMempool) EXCLUSIVE_LOCKS_REQUIRED(cs_main

	AssertLockHeld (mempool.cs)

	while (it!=disconnectpool.queuedTx.get< insertion_order >().rend())

disconnectpool queuedTx	clear ()

mempool	UpdateTransactionsFromBlock (vHashUpdate)

	LimitMempoolSize (mempool, gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE)*1000000, std::chrono::hours{gArgs.GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY)})

static bool	CheckInputsFromMempoolAndCache (const CTransaction &tx, TxValidationState &state, const CCoinsViewCache &view, const CTxMemPool &pool, unsigned int flags, PrecomputedTransactionData &txdata) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static bool	AcceptToMemoryPoolWithTime (const CChainParams &chainparams, CTxMemPool &pool, TxValidationState &state, const CTransactionRef &tx, int64_t nAcceptTime, std::list< CTransactionRef > plTxnReplaced, bool bypass_limits, bool test_accept, CAmount fee_out=nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	(try to) add transaction to memory pool with a specified acceptance time More...

bool	AcceptToMemoryPool (CTxMemPool &pool, TxValidationState &state, const CTransactionRef &tx, std::list< CTransactionRef > plTxnReplaced, bool bypass_limits, bool test_accept, CAmount fee_out)
	(try to) add transaction to memory pool plTxnReplaced will be appended to with all transactions replaced from mempool More...

CTransactionRef	GetTransaction (const CBlockIndex const block_index, const CTxMemPool const mempool, const uint256 &hash, const Consensus::Params &consensusParams, uint256 &hashBlock)
	Return transaction from the block at block_index. More...

static bool	WriteBlockToDisk (const CBlock &block, FlatFilePos &pos, const CMessageHeader::MessageStartChars &messageStart)

bool	ReadBlockFromDisk (CBlock &block, const FlatFilePos &pos, const Consensus::Params &consensusParams)
	Functions for disk access for blocks. More...

bool	ReadBlockFromDisk (CBlock &block, const CBlockIndex *pindex, const Consensus::Params &consensusParams)

bool	ReadRawBlockFromDisk (std::vector< uint8_t > &block, const FlatFilePos &pos, const CMessageHeader::MessageStartChars &message_start)

bool	ReadRawBlockFromDisk (std::vector< uint8_t > &block, const CBlockIndex *pindex, const CMessageHeader::MessageStartChars &message_start)

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

static void	AlertNotify (const std::string &strMessage)

static void	CheckForkWarningConditions () EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static void	CheckForkWarningConditionsOnNewFork (CBlockIndex *pindexNewForkTip) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static void	InvalidChainFound (CBlockIndex *pindexNew) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

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

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

int	GetSpendHeight (const CCoinsViewCache &inputs)
	Return the spend height, which is one more than the inputs.GetBestBlock(). More...

void	InitScriptExecutionCache ()
	Initializes the script-execution cache. More...

static bool	UndoWriteToDisk (const CBlockUndo &blockundo, FlatFilePos &pos, const uint256 &hashBlock, const CMessageHeader::MessageStartChars &messageStart)

bool	UndoReadFromDisk (CBlockUndo &blockundo, const CBlockIndex *pindex)

static bool	AbortNode (const std::string &strMessage, bilingual_str user_message=bilingual_str())
	Abort with a message. More...

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

int	ApplyTxInUndo (Coin &&undo, CCoinsViewCache &view, const COutPoint &out)
	Restore the UTXO in a Coin at a given COutPoint. More...

static void	FlushUndoFile (int block_file, bool finalize=false)

static void	FlushBlockFile (bool fFinalize=false, bool finalize_undo=false)

static bool	FindUndoPos (BlockValidationState &state, int nFile, FlatFilePos &pos, unsigned int nAddSize)

static bool	WriteUndoDataForBlock (const CBlockUndo &blockundo, BlockValidationState &state, CBlockIndex *pindex, const CChainParams &chainparams)

void	ThreadScriptCheck (int worker_num)
	Run an instance of the script checking thread. More...

VersionBitsCache versionbitscache	GUARDED_BY (cs_main)

int32_t	ComputeBlockVersion (const CBlockIndex *pindexPrev, const Consensus::Params &params)
	Determine what nVersion a new block should use. More...

static bool	IsScriptWitnessEnabled (const Consensus::Params &params)

static void	DoWarning (const bilingual_str &warning)

static void	AppendWarning (bilingual_str &res, const bilingual_str &warn)
	Private helper function that concatenates warning messages. More...

static void	UpdateTip (CTxMemPool &mempool, const CBlockIndex *pindexNew, const CChainParams &chainParams) EXCLUSIVE_LOCKS_REQUIRED(
	Check warning conditions and do some notifications on new chain tip set. More...

static SynchronizationState	GetSynchronizationState (bool init)

static bool	NotifyHeaderTip () LOCKS_EXCLUDED(cs_main)

static void	LimitValidationInterfaceQueue () LOCKS_EXCLUDED(cs_main)

bool	ActivateBestChain (BlockValidationState &state, const CChainParams &chainparams, std::shared_ptr< const CBlock > pblock)
	Find the best known block, and make it the tip of the block chain. More...

bool	PreciousBlock (BlockValidationState &state, const CChainParams &params, CBlockIndex *pindex)
	Mark a block as precious and reorganize. More...

bool	InvalidateBlock (BlockValidationState &state, const CChainParams &chainparams, CBlockIndex *pindex)
	Mark a block as invalid. More...

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

static bool	FindBlockPos (FlatFilePos &pos, unsigned int nAddSize, unsigned int nHeight, uint64_t nTime, bool fKnown=false)

static bool	CheckBlockHeader (const CBlockHeader &block, BlockValidationState &state, const Consensus::Params &consensusParams, bool fCheckPOW=true)

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

bool	IsWitnessEnabled (const CBlockIndex *pindexPrev, const Consensus::Params &params)
	Check whether witness commitments are required for a block, and whether to enforce NULLDUMMY (BIP 147) rules. More...

void	UpdateUncommittedBlockStructures (CBlock &block, const CBlockIndex *pindexPrev, const Consensus::Params &consensusParams)
	Update uncommitted block structures (currently: only the witness reserved value). More...

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

static CBlockIndex *	GetLastCheckpoint (const CCheckpointData &data) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Returns last CBlockIndex* that is a checkpoint. More...

static bool	ContextualCheckBlockHeader (const CBlockHeader &block, BlockValidationState &state, const CChainParams &params, const CBlockIndex *pindexPrev, int64_t nAdjustedTime) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
	Context-dependent validity checks. More...

static bool	ContextualCheckBlock (const CBlock &block, BlockValidationState &state, const Consensus::Params &consensusParams, const CBlockIndex *pindexPrev)
	NOTE: This function is not currently invoked by ConnectBlock(), so we should consider upgrade issues if we change which consensus rules are enforced in this function (eg by adding a new consensus rule). More...

static FlatFilePos	SaveBlockToDisk (const CBlock &block, int nHeight, const CChainParams &chainparams, const FlatFilePos *dbp)
	Store block on disk. More...

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

uint64_t	CalculateCurrentUsage ()
	BLOCK PRUNING CODE. More...

void	UnlinkPrunedFiles (const std::set< int > &setFilesToPrune)
	Actually unlink the specified files. More...

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

FILE *	OpenBlockFile (const FlatFilePos &pos, bool fReadOnly)
	Open a block file (blk?????.dat) More...

fs::path	GetBlockPosFilename (const FlatFilePos &pos)
	Translation to a filesystem path. More...

static bool	LoadBlockIndexDB (ChainstateManager &chainman, const CChainParams &chainparams) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	UnloadBlockIndex (CTxMemPool *mempool, ChainstateManager &chainman)
	Unload database information. More...

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

void	LoadExternalBlockFile (const CChainParams &chainparams, FILE fileIn, FlatFilePos dbp)
	Import blocks from an external file. More...

CBlockFileInfo *	GetBlockFileInfo (size_t n)
	Get block file info entry for one block file. More...

ThresholdState	VersionBitsTipState (const Consensus::Params &params, Consensus::DeploymentPos pos)
	Get the BIP9 state for a given deployment at the current tip. More...

BIP9Stats	VersionBitsTipStatistics (const Consensus::Params &params, Consensus::DeploymentPos pos)
	Get the numerical statistics for the BIP9 state for a given deployment at the current tip. More...

int	VersionBitsTipStateSinceHeight (const Consensus::Params &params, Consensus::DeploymentPos pos)
	Get the block height at which the BIP9 deployment switched into the state for the block building on the current tip. More...

bool	LoadMempool (CTxMemPool &pool)
	Load the mempool from disk. More...

bool	DumpMempool (const CTxMemPool &pool)
	Dump the mempool to disk. More...

double	GuessVerificationProgress (const ChainTxData &data, const CBlockIndex *pindex)
	Guess how far we are in the verification process at the given block index require cs_main if pindex has not been validated yet (because nChainTx might be unset) More...

Variables
static const unsigned int	EXTRA_DESCENDANT_TX_SIZE_LIMIT = 10000
	An extra transaction can be added to a package, as long as it only has one ancestor and is no larger than this. More...

static const unsigned int	MAX_DISCONNECTED_TX_POOL_SIZE = 20000
	Maximum kilobytes for transactions to store for processing during reorg. More...

static const unsigned int	BLOCKFILE_CHUNK_SIZE = 0x1000000
	The pre-allocation chunk size for blk?????.dat files (since 0.8) More...

static const unsigned int	UNDOFILE_CHUNK_SIZE = 0x100000
	The pre-allocation chunk size for rev?????.dat files (since 0.8) More...

static constexpr std::chrono::hours	DATABASE_WRITE_INTERVAL {1}
	Time to wait between writing blocks/block index to disk. More...

static constexpr std::chrono::hours	DATABASE_FLUSH_INTERVAL {24}
	Time to wait between flushing chainstate to disk. More...

static constexpr std::chrono::hours	MAX_FEE_ESTIMATION_TIP_AGE {3}
	Maximum age of our tip for us to be considered current for fee estimation. More...

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

ChainstateManager	g_chainman

RecursiveMutex	cs_main
	Mutex to guard access to validation specific variables, such as reading or changing the chainstate. More...

CBlockIndex *	pindexBestHeader = nullptr
	Best header we've seen so far (used for getheaders queries' starting points). More...

Mutex	g_best_block_mutex

std::condition_variable	g_best_block_cv

uint256	g_best_block

bool	g_parallel_script_checks {false}
	Whether there are dedicated script-checking threads running. More...

bool	fHavePruned = false
	Pruning-related variables and constants. More...

bool	fPruneMode = false
	True if we're running in -prune mode. More...

bool	fRequireStandard = true

bool	fCheckBlockIndex = false

bool	fCheckpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED

uint64_t	nPruneTarget = 0
	Number of MiB of block files that we're trying to stay below. More...

int64_t	nMaxTipAge = DEFAULT_MAX_TIP_AGE
	If the tip is older than this (in seconds), the node is considered to be in initial block download. More...

uint256	hashAssumeValid
	Block hash whose ancestors we will assume to have valid scripts without checking them. More...

arith_uint256	nMinimumChainWork
	Minimum work we will assume exists on some valid chain. More...

CFeeRate	minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE)
	A fee rate smaller than this is considered zero fee (for relaying, mining and transaction creation) More...

CBlockPolicyEstimator	feeEstimator

std::unique_ptr< CBlockTreeDB >	pblocktree
	Global variable that points to the active block tree (protected by cs_main) More...

std::vector< COutPoint >	vNoSpendsRemaining

static for(const COutPoint &removed:vNoSpendsRemaining) bool	IsCurrentForFeeEstimation () EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static void mempool	cs

std::vector< uint256 >	vHashUpdate

auto	it = disconnectpool.queuedTx.get<insertion_order>().rbegin()

static CBlockIndex *	pindexBestForkTip = nullptr

static CBlockIndex *	pindexBestForkBase = nullptr

static CuckooCache::cache < uint256, SignatureCacheHasher >	g_scriptExecutionCache

static CSHA256	g_scriptExecutionCacheHasher

static CCheckQueue< CScriptCheck >	scriptcheckqueue (128)

static int64_t	nTimeCheck = 0

static int64_t	nTimeForks = 0

static int64_t	nTimeVerify = 0

static int64_t	nTimeConnect = 0

static int64_t	nTimeIndex = 0

static int64_t	nTimeCallbacks = 0

static int64_t	nTimeTotal = 0

static int64_t	nBlocksTotal = 0

static int64_t	nTimeReadFromDisk = 0

static int64_t	nTimeConnectTotal = 0

static int64_t	nTimeFlush = 0

static int64_t	nTimeChainState = 0

static int64_t	nTimePostConnect = 0

static const uint64_t	MEMPOOL_DUMP_VERSION = 1

Macro Definition Documentation

#define MICRO 0.000001

Definition at line 56 of file validation.cpp.

#define MILLI 0.001

Definition at line 57 of file validation.cpp.

Function Documentation

static bool AbortNode	(	const std::string &	strMessage,
		bilingual_str	user_message = `bilingual_str()`
	)

static

Abort with a message.

Definition at line 1660 of file validation.cpp.

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

static

Definition at line 1672 of file validation.cpp.

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bool AcceptToMemoryPool	(	CTxMemPool &	pool,
		TxValidationState &	state,
		const CTransactionRef &	tx,
		std::list< CTransactionRef > *	plTxnReplaced,
		bool	bypass_limits,
		bool	test_accept = `false`,
		CAmount *	fee_out = `nullptr`
	)

(try to) add transaction to memory pool plTxnReplaced will be appended to with all transactions replaced from mempool

Parameters

[out] fee_out optional argument to return tx fee to the caller

Definition at line 1084 of file validation.cpp.

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static bool AcceptToMemoryPoolWithTime	(	const CChainParams &	chainparams,
		CTxMemPool &	pool,
		TxValidationState &	state,
		const CTransactionRef &	tx,
		int64_t	nAcceptTime,
		std::list< CTransactionRef > *	plTxnReplaced,
		bool	bypass_limits,
		bool	test_accept,
		CAmount *	fee_out = `nullptr`
	)

static

(try to) add transaction to memory pool with a specified acceptance time

Definition at line 1062 of file validation.cpp.

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bool ActivateBestChain	(	BlockValidationState &	state,
		const CChainParams &	chainparams,
		std::shared_ptr< const CBlock >	pblock = `std::shared_ptr< const CBlock >()`
	)

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

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

Definition at line 2968 of file validation.cpp.

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static void AlertNotify ( const std::string & strMessage )

static

Definition at line 1317 of file validation.cpp.

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static void AppendWarning	(	bilingual_str &	res,
		const bilingual_str &	warn
	)

static

Private helper function that concatenates warning messages.

Definition at line 2440 of file validation.cpp.

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int ApplyTxInUndo	(	Coin &&	undo,
		CCoinsViewCache &	view,
		const COutPoint &	out
	)

Restore the UTXO in a Coin at a given COutPoint.

Parameters

undo	The Coin to be restored.
view	The coins view to which to apply the changes.
out	The out point that corresponds to the tx input.

Returns: A DisconnectResult as an int

Definition at line 1685 of file validation.cpp.

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AssertLockHeld ( mempool. cs )

static FlatFileSeq BlockFileSeq ( )

static

Definition at line 4057 of file validation.cpp.

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uint64_t CalculateCurrentUsage ( )

BLOCK PRUNING CODE.

Calculate the amount of disk space the block & undo files currently use.

Definition at line 3908 of file validation.cpp.

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CChain& ChainActive ( )

Please prefer the identical ChainstateManager::ActiveChain.

Definition at line 113 of file validation.cpp.

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mempool removeForReorg & ChainstateActive ( )

Please prefer the identical ChainstateManager::ActiveChainstate.

Definition at line 106 of file validation.cpp.

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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 3350 of file validation.cpp.

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static bool CheckBlockHeader	(	const CBlockHeader &	block,
		BlockValidationState &	state,
		const Consensus::Params &	consensusParams,
		bool	fCheckPOW = `true`
	)

static

Definition at line 3341 of file validation.cpp.

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bool CheckFinalTx	(	const CTransaction &	tx,
		int	flags = `-1`
	)

Transaction validation functions.

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

Calls IsFinalTx() with current block height and appropriate block time.

See consensus/consensus.h for flag definitions.

Definition at line 206 of file validation.cpp.

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static void CheckForkWarningConditions ( )

static

Definition at line 1337 of file validation.cpp.

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static void CheckForkWarningConditionsOnNewFork ( CBlockIndex * pindexNewForkTip )

static

Definition at line 1378 of file validation.cpp.

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bool CheckInputScripts	(	const CTransaction &	tx,
		TxValidationState &	state,
		const CCoinsViewCache &	inputs,
		unsigned int	flags,
		bool	cacheSigStore,
		bool	cacheFullScriptStore,
		PrecomputedTransactionData &	txdata,
		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.

Setting cacheSigStore/cacheFullScriptStore 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.

Note that we may set state.reason to NOT_STANDARD for extra soft-fork flags in flags, block-checking callers should probably reset it to CONSENSUS in such cases.

Non-static (and re-declared) in src/test/txvalidationcache_tests.cpp

Definition at line 1516 of file validation.cpp.

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static bool CheckInputsFromMempoolAndCache	(	const CTransaction &	tx,
		TxValidationState &	state,
		const CCoinsViewCache &	view,
		const CTxMemPool &	pool,
		unsigned int	flags,
		PrecomputedTransactionData &	txdata
	)

static

Definition at line 412 of file validation.cpp.

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bool CheckSequenceLocks	(	const CTxMemPool &	pool,
		const CTransaction &	tx,
		int	flags,
		LockPoints *	lp,
		bool	useExistingLockPoints
	)

Definition at line 256 of file validation.cpp.

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disconnectpool queuedTx clear ( )

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int32_t ComputeBlockVersion	(	const CBlockIndex *	pindexPrev,
		const Consensus::Params &	params
	)

Determine what nVersion a new block should use.

Definition at line 1830 of file validation.cpp.

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static bool ContextualCheckBlock	(	const CBlock &	block,
		BlockValidationState &	state,
		const Consensus::Params &	consensusParams,
		const CBlockIndex *	pindexPrev
	)

static

NOTE: This function is not currently invoked by ConnectBlock(), so we should consider upgrade issues if we change which consensus rules are enforced in this function (eg by adding a new consensus rule).

See comment in ConnectBlock(). Note that -reindex-chainstate skips the validation that happens here!

Definition at line 3543 of file validation.cpp.

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static bool ContextualCheckBlockHeader	(	const CBlockHeader &	block,
		BlockValidationState &	state,
		const CChainParams &	params,
		const CBlockIndex *	pindexPrev,
		int64_t	nAdjustedTime
	)

static

Context-dependent validity checks.

By "context", we mean only the previous block headers, but not the UTXO set; UTXO-related validity checks are done in ConnectBlock(). NOTE: This function is not currently invoked by ConnectBlock(), so we should consider upgrade issues if we change which consensus rules are enforced in this function (eg by adding a new consensus rule). See comment in ConnectBlock(). Note that -reindex-chainstate skips the validation that happens here!

Definition at line 3496 of file validation.cpp.

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static void DoWarning ( const bilingual_str & warning )

static

Definition at line 2429 of file validation.cpp.

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bool DumpMempool ( const CTxMemPool & pool )

Dump the mempool to disk.

Definition at line 5141 of file validation.cpp.

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std::atomic_bool fImporting ( false )

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static bool FindBlockPos	(	FlatFilePos &	pos,
		unsigned int	nAddSize,
		unsigned int	nHeight,
		uint64_t	nTime,
		bool	fKnown = `false`
	)

static

Definition at line 3265 of file validation.cpp.

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CBlockIndex* FindForkInGlobalIndex	(	const CChain &	chain,
		const CBlockLocator &	locator
	)

Find the last common block between the parameter chain and a locator.

Definition at line 180 of file validation.cpp.

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static bool FindUndoPos	(	BlockValidationState &	state,
		int	nFile,
		FlatFilePos &	pos,
		unsigned int	nAddSize
	)

static

Definition at line 3319 of file validation.cpp.

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static void FlushBlockFile	(	bool	fFinalize = `false`,
		bool	finalize_undo = `false`
	)

static

Definition at line 1780 of file validation.cpp.

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static void FlushUndoFile	(	int	block_file,
		bool	finalize = `false`
	)

static

Definition at line 1772 of file validation.cpp.

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std::atomic_bool fReindex ( false )

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

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

Definition at line 3442 of file validation.cpp.

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CBlockFileInfo* GetBlockFileInfo ( size_t n )

Get block file info entry for one block file.

Definition at line 5021 of file validation.cpp.

fs::path GetBlockPosFilename ( const FlatFilePos & pos )

Translation to a filesystem path.

Definition at line 4076 of file validation.cpp.

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static unsigned int GetBlockScriptFlags	(	const CBlockIndex *	pindex,
		const Consensus::Params &	chainparams
	)

static

Definition at line 1881 of file validation.cpp.

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

Definition at line 1236 of file validation.cpp.

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static CBlockIndex* GetLastCheckpoint ( const CCheckpointData & data )

static

Returns last CBlockIndex* that is a checkpoint.

Definition at line 3472 of file validation.cpp.

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int GetSpendHeight ( const CCoinsViewCache & inputs )

Return the spend height, which is one more than the inputs.GetBestBlock().

While checking, GetBestBlock() refers to the parent block. (protected by cs_main) This is also true for mempool checks.

Definition at line 1470 of file validation.cpp.

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static SynchronizationState GetSynchronizationState ( bool init )

static

Definition at line 2833 of file validation.cpp.

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CTransactionRef GetTransaction	(	const CBlockIndex *const	block_index,
		const CTxMemPool *const	mempool,
		const uint256 &	hash,
		const Consensus::Params &	consensusParams,
		uint256 &	hashBlock
	)

Return transaction from the block at block_index.

If block_index is not provided, fall back to mempool. If mempool is not provided or the tx couldn't be found in mempool, fall back to g_txindex.

Parameters

[in]	block_index	The block to read from disk, or nullptr
[in]	mempool	If block_index is not provided, look in the mempool, if provided
[in]	hash	The txid
[in]	consensusParams	The params
[out]	hashBlock	The hash of block_index, if the tx was found via block_index

Returns: The tx if found, otherwise nullptr

Definition at line 1092 of file validation.cpp.

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VersionBitsCache versionbitscache GUARDED_BY ( cs_main )

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

Guess how far we are in the verification process at the given block index require cs_main if pindex has not been validated yet (because nChainTx might be unset)

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

Definition at line 5202 of file validation.cpp.

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if ( expired! = 0 )

Definition at line 335 of file validation.cpp.

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void InitScriptExecutionCache ( )

Initializes the script-execution cache.

Definition at line 1481 of file validation.cpp.

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bool InvalidateBlock	(	BlockValidationState &	state,
		const CChainParams &	chainparams,
		CBlockIndex *	pindex
	)

Mark a block as invalid.

Definition at line 3140 of file validation.cpp.

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static void InvalidChainFound ( CBlockIndex * pindexNew )

static

Definition at line 1412 of file validation.cpp.

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static bool IsScriptWitnessEnabled ( const Consensus::Params & params )

static

Definition at line 1876 of file validation.cpp.

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bool IsWitnessEnabled	(	const CBlockIndex *	pindexPrev,
		const Consensus::Params &	params
	)

Check whether witness commitments are required for a block, and whether to enforce NULLDUMMY (BIP 147) rules.

Note that transaction witness validation rules are always enforced when P2SH is enforced.

Definition at line 3424 of file validation.cpp.

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static void LimitMempoolSize	(	CTxMemPool &	pool,
		size_t	limit,
		std::chrono::seconds	age
	)

static

LimitMempoolSize	(	mempool	,
		gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE)*	1000000,
		std::chrono::hours{gArgs.GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY)}
	)

static void LimitValidationInterfaceQueue ( )

static

Definition at line 2862 of file validation.cpp.

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static bool LoadBlockIndexDB	(	ChainstateManager &	chainman,
		const CChainParams &	chainparams
	)

static

Definition at line 4167 of file validation.cpp.

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void LoadExternalBlockFile	(	const CChainParams &	chainparams,
		FILE *	fileIn,
		FlatFilePos *	dbp
	)

Import blocks from an external file.

Definition at line 4672 of file validation.cpp.

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bool LoadGenesisBlock ( const CChainParams & chainparams )

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

Definition at line 4667 of file validation.cpp.

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bool LoadMempool ( CTxMemPool & pool )

Load the mempool from disk.

Definition at line 5048 of file validation.cpp.

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CBlockIndex* LookupBlockIndex ( const uint256 & hash )

Definition at line 173 of file validation.cpp.

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static bool NotifyHeaderTip ( )

static

Definition at line 2840 of file validation.cpp.

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FILE* OpenBlockFile	(	const FlatFilePos &	pos,
		bool	fReadOnly
	)

Open a block file (blk?????.dat)

Definition at line 4067 of file validation.cpp.

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static FILE * OpenUndoFile	(	const FlatFilePos &	pos,
		bool	fReadOnly = `false`
	)

static

Open an undo file (rev?????.dat)

Definition at line 4072 of file validation.cpp.

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bool PreciousBlock	(	BlockValidationState &	state,
		const CChainParams &	params,
		CBlockIndex *	pindex
	)

Mark a block as precious and reorganize.

May not be called in a validationinterface callback.

Definition at line 3000 of file validation.cpp.

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void PruneBlockFilesManual ( int nManualPruneHeight )

Prune block files up to a given height.

Definition at line 3988 of file validation.cpp.

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bool ReadBlockFromDisk	(	CBlock &	block,
		const FlatFilePos &	pos,
		const Consensus::Params &	consensusParams
	)

Functions for disk access for blocks.

Definition at line 1145 of file validation.cpp.

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bool ReadBlockFromDisk	(	CBlock &	block,
		const CBlockIndex *	pindex,
		const Consensus::Params &	consensusParams
	)

Definition at line 1174 of file validation.cpp.

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bool ReadRawBlockFromDisk	(	std::vector< uint8_t > &	block,
		const FlatFilePos &	pos,
		const CMessageHeader::MessageStartChars &	message_start
	)

Definition at line 1190 of file validation.cpp.

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bool ReadRawBlockFromDisk	(	std::vector< uint8_t > &	block,
		const CBlockIndex *	pindex,
		const CMessageHeader::MessageStartChars &	message_start
	)

Definition at line 1225 of file validation.cpp.

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void ResetBlockFailureFlags ( CBlockIndex * pindex )

Remove invalidity status from a block and its descendants.

Definition at line 3178 of file validation.cpp.

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static FlatFilePos SaveBlockToDisk	(	const CBlock &	block,
		int	nHeight,
		const CChainParams &	chainparams,
		const FlatFilePos *	dbp
	)

static

Store block on disk.

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

Definition at line 3742 of file validation.cpp.

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bool TestBlockValidity	(	BlockValidationState &	state,
		const CChainParams &	chainparams,
		const CBlock &	block,
		CBlockIndex *	pindexPrev,
		bool	fCheckPOW,
		bool	fCheckMerkleRoot
	)

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

Definition at line 3878 of file validation.cpp.

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bool TestLockPointValidity ( const LockPoints * lp )

Test whether the LockPoints height and time are still valid on the current chain.

Definition at line 238 of file validation.cpp.

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void ThreadScriptCheck ( int worker_num )

Run an instance of the script checking thread.

Definition at line 1823 of file validation.cpp.

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pool TrimToSize	(	limit	,
		&	vNoSpendsRemaining
	)

static FlatFileSeq UndoFileSeq ( )

static

Definition at line 4062 of file validation.cpp.

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bool UndoReadFromDisk	(	CBlockUndo &	blockundo,
		const CBlockIndex *	pindex
	)

Definition at line 1628 of file validation.cpp.

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static bool UndoWriteToDisk	(	const CBlockUndo &	blockundo,
		FlatFilePos &	pos,
		const uint256 &	hashBlock,
		const CMessageHeader::MessageStartChars &	messageStart
	)

static

Definition at line 1601 of file validation.cpp.

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void UnlinkPrunedFiles ( const std::set< int > & setFilesToPrune )

Actually unlink the specified files.

Definition at line 3954 of file validation.cpp.

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void UnloadBlockIndex	(	CTxMemPool *	mempool,
		ChainstateManager &	chainman
	)

Unload database information.

Definition at line 4601 of file validation.cpp.

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

Definition at line 1443 of file validation.cpp.

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void UpdateCoins	(	const CTransaction &	tx,
		CCoinsViewCache &	inputs,
		int	nHeight
	)

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

Definition at line 1458 of file validation.cpp.

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static void UpdateMempoolForReorg	(	CTxMemPool &	mempool,
		DisconnectedBlockTransactions &	disconnectpool,
		bool	fAddToMempool
	)

static

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static void UpdateTip	(	CTxMemPool &	mempool,
		const CBlockIndex *	pindexNew,
		const CChainParams &	chainParams
	)

static

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

Definition at line 2447 of file validation.cpp.

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mempool UpdateTransactionsFromBlock ( vHashUpdate )

void UpdateUncommittedBlockStructures	(	CBlock &	block,
		const CBlockIndex *	pindexPrev,
		const Consensus::Params &	consensusParams
	)

Update uncommitted block structures (currently: only the witness reserved value).

This is safe for submitted blocks.

Definition at line 3430 of file validation.cpp.

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ThresholdState VersionBitsTipState	(	const Consensus::Params &	params,
		Consensus::DeploymentPos	pos
	)

Get the BIP9 state for a given deployment at the current tip.

Definition at line 5028 of file validation.cpp.

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int VersionBitsTipStateSinceHeight	(	const Consensus::Params &	params,
		Consensus::DeploymentPos	pos
	)

Get the block height at which the BIP9 deployment switched into the state for the block building on the current tip.

Definition at line 5040 of file validation.cpp.

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BIP9Stats VersionBitsTipStatistics	(	const Consensus::Params &	params,
		Consensus::DeploymentPos	pos
	)

Get the numerical statistics for the BIP9 state for a given deployment at the current tip.

Definition at line 5034 of file validation.cpp.

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while ( it! = disconnectpool.queuedTx.get<insertion_order>().rend() )

Definition at line 382 of file validation.cpp.

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static bool WriteBlockToDisk	(	const CBlock &	block,
		FlatFilePos &	pos,
		const CMessageHeader::MessageStartChars &	messageStart
	)

static

Definition at line 1124 of file validation.cpp.

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static bool WriteUndoDataForBlock	(	const CBlockUndo &	blockundo,
		BlockValidationState &	state,
		CBlockIndex *	pindex,
		const CChainParams &	chainparams
	)

static

Definition at line 1794 of file validation.cpp.

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Variable Documentation

const unsigned int BLOCKFILE_CHUNK_SIZE = 0x1000000

static

The pre-allocation chunk size for blk?????.dat files (since 0.8)

Definition at line 68 of file validation.cpp.

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

Initial value:

{
    "level 0 reads the blocks from disk",
    "level 1 verifies block validity",
    "level 2 verifies undo data",
    "level 3 checks disconnection of tip blocks",
    "level 4 tries to reconnect the blocks",
    "each level includes the checks of the previous levels",
}

Documentation for argument 'checklevel'.

Definition at line 77 of file validation.cpp.

void mempool cs

Initial value:

{

AssertLockHeld(cs_main)

cs_main

RecursiveMutex cs_main

Mutex to guard access to validation specific variables, such as reading or changing the chainstate...

Definition: validation.cpp:129

AssertLockHeld

AssertLockHeld(mempool.cs)

Definition at line 371 of file validation.cpp.

RecursiveMutex cs_main

Mutex to guard access to validation specific variables, such as reading or changing the chainstate.

This may also need to be locked when updating the transaction pool, e.g. on AcceptToMemoryPool. See CTxMemPool::cs comment for details.

The transaction pool has a separate lock to allow reading from it and the chainstate at the same time.

Definition at line 129 of file validation.cpp.

constexpr std::chrono::hours DATABASE_FLUSH_INTERVAL {24}

static

Time to wait between flushing chainstate to disk.

Definition at line 74 of file validation.cpp.

constexpr std::chrono::hours DATABASE_WRITE_INTERVAL {1}

static

Time to wait between writing blocks/block index to disk.

Definition at line 72 of file validation.cpp.

const unsigned int EXTRA_DESCENDANT_TX_SIZE_LIMIT = 10000

static

An extra transaction can be added to a package, as long as it only has one ancestor and is no larger than this.

Not really any reason to make this configurable as it doesn't materially change DoS parameters.

Definition at line 64 of file validation.cpp.

bool fCheckBlockIndex = false

Definition at line 141 of file validation.cpp.

bool fCheckpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED

Definition at line 142 of file validation.cpp.

CBlockPolicyEstimator feeEstimator

Definition at line 151 of file validation.cpp.

bool fHavePruned = false

Pruning-related variables and constants.

True if any block files have ever been pruned.

Definition at line 138 of file validation.cpp.

bool fPruneMode = false

True if we're running in -prune mode.

Definition at line 139 of file validation.cpp.

bool fRequireStandard = true

Definition at line 140 of file validation.cpp.

uint256 g_best_block

Definition at line 134 of file validation.cpp.

std::condition_variable g_best_block_cv

Definition at line 133 of file validation.cpp.

Mutex g_best_block_mutex

Definition at line 132 of file validation.cpp.

ChainstateManager g_chainman

Definition at line 104 of file validation.cpp.

bool g_parallel_script_checks {false}

Whether there are dedicated script-checking threads running.

False indicates all script checking is done on the main threadMessageHandler thread.

Definition at line 135 of file validation.cpp.

CuckooCache::cache<uint256, SignatureCacheHasher> g_scriptExecutionCache

static

Definition at line 1478 of file validation.cpp.

CSHA256 g_scriptExecutionCacheHasher

static

Definition at line 1479 of file validation.cpp.

uint256 hashAssumeValid

Block hash whose ancestors we will assume to have valid scripts without checking them.

Definition at line 146 of file validation.cpp.

for (const COutPoint& removed : vNoSpendsRemaining) bool IsCurrentForFeeEstimation() EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static

Definition at line 345 of file validation.cpp.

auto it = disconnectpool.queuedTx.get<insertion_order>().rbegin()

Definition at line 381 of file validation.cpp.

const unsigned int MAX_DISCONNECTED_TX_POOL_SIZE = 20000

static

Maximum kilobytes for transactions to store for processing during reorg.

Definition at line 66 of file validation.cpp.

constexpr std::chrono::hours MAX_FEE_ESTIMATION_TIP_AGE {3}

static

Maximum age of our tip for us to be considered current for fee estimation.

Definition at line 76 of file validation.cpp.

const uint64_t MEMPOOL_DUMP_VERSION = 1

static

Definition at line 5046 of file validation.cpp.

CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE)

A fee rate smaller than this is considered zero fee (for relaying, mining and transaction creation)

Definition at line 149 of file validation.cpp.

int64_t nBlocksTotal = 0

static

Definition at line 1941 of file validation.cpp.

int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE

If the tip is older than this (in seconds), the node is considered to be in initial block download.

Definition at line 144 of file validation.cpp.

arith_uint256 nMinimumChainWork

Minimum work we will assume exists on some valid chain.

Definition at line 147 of file validation.cpp.

uint64_t nPruneTarget = 0

Number of MiB of block files that we're trying to stay below.

Definition at line 143 of file validation.cpp.

int64_t nTimeCallbacks = 0

static

Definition at line 1939 of file validation.cpp.

int64_t nTimeChainState = 0

static

Definition at line 2559 of file validation.cpp.

int64_t nTimeCheck = 0

static

Definition at line 1934 of file validation.cpp.

int64_t nTimeConnect = 0

static

Definition at line 1937 of file validation.cpp.

int64_t nTimeConnectTotal = 0

static

Definition at line 2557 of file validation.cpp.

int64_t nTimeFlush = 0

static

Definition at line 2558 of file validation.cpp.

int64_t nTimeForks = 0

static

Definition at line 1935 of file validation.cpp.

int64_t nTimeIndex = 0

static

Definition at line 1938 of file validation.cpp.

int64_t nTimePostConnect = 0

static

Definition at line 2560 of file validation.cpp.

int64_t nTimeReadFromDisk = 0

static

Definition at line 2556 of file validation.cpp.

int64_t nTimeTotal = 0

static

Definition at line 1940 of file validation.cpp.

int64_t nTimeVerify = 0

static

Definition at line 1936 of file validation.cpp.

std::unique_ptr<CBlockTreeDB> pblocktree

Global variable that points to the active block tree (protected by cs_main)

Definition at line 199 of file validation.cpp.

CBlockIndex * pindexBestForkBase = nullptr

static

Definition at line 1315 of file validation.cpp.

CBlockIndex* pindexBestForkTip = nullptr

static

Definition at line 1315 of file validation.cpp.

CBlockIndex* pindexBestHeader = nullptr

Best header we've seen so far (used for getheaders queries' starting points).

Definition at line 131 of file validation.cpp.

CCheckQueue<CScriptCheck> scriptcheckqueue(128)

static

const unsigned int UNDOFILE_CHUNK_SIZE = 0x100000

static

The pre-allocation chunk size for rev?????.dat files (since 0.8)

Definition at line 70 of file validation.cpp.

std::vector<uint256> vHashUpdate

Definition at line 374 of file validation.cpp.

std::vector<COutPoint> vNoSpendsRemaining

Definition at line 339 of file validation.cpp.

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