Bitcoin Core  25.99.0
P2P Digital Currency
Classes | Namespaces | Enumerations | Functions | Variables
validation.h File Reference
#include <arith_uint256.h>
#include <attributes.h>
#include <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 <shutdown.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/translation.h>
#include <versionbits.h>
#include <atomic>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <stdint.h>
#include <string>
#include <thread>
#include <utility>
#include <vector>
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Classes

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

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

void StartScriptCheckWorkerThreads (int threads_num)
 Run instances of script checking worker threads. More...
 
void StopScriptCheckWorkerThreads ()
 Stop all of the script checking worker threads. More...
 
CAmount 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) 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 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, const std::function< NodeClock::time_point()> &adjusted_time_callback, 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...
 
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)
 
template<typename DEP >
bool DeploymentEnabled (const ChainstateManager &chainman, DEP dep)
 
const AssumeutxoDataExpectedAssumeutxo (const int height, const CChainParams &params)
 Return the expected assumeutxo value for a given height, if one exists. More...
 
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 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 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 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< LockPointsCalculateLockPointsAtTip (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 435 of file validation.h.

◆ DisconnectResult

Enumerator
DISCONNECT_OK 
DISCONNECT_UNCLEAN 
DISCONNECT_FAILED 

Definition at line 383 of file validation.h.

◆ FlushStateMode

enum FlushStateMode
strong
See also
Chainstate::FlushStateToDisk
Enumerator
NONE 
IF_NEEDED 
PERIODIC 
ALWAYS 

Definition at line 393 of file validation.h.

◆ SnapshotCompletionResult

Enumerator
SUCCESS 
SKIPPED 
MISSING_CHAINPARAMS 
STATS_FAILED 
HASH_MISMATCH 
BASE_BLOCKHASH_MISMATCH 

Definition at line 821 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 85 of file validation.h.

◆ VerifyDBResult

enum VerifyDBResult
strong
Enumerator
SUCCESS 
CORRUPTED_BLOCK_DB 
INTERRUPTED 
SKIPPED_L3_CHECKS 
SKIPPED_MISSING_BLOCKS 

Definition at line 358 of file validation.h.

Function Documentation

◆ AbortNode()

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

Definition at line 1845 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 
)

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_chainstateReference to the active chainstate.
[in]txThe transaction to submit for mempool acceptance.
[in]accept_timeThe timestamp for adding the transaction to the mempool. It is also used to determine when the entry expires.
[in]bypass_limitsWhen true, don't enforce mempool fee and capacity limits.
[in]test_acceptWhen 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 1487 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 3584 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 3465 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]tipChain tip to check tx sequence locks against. For example, the tip of the current active chain.
[in]lock_pointsLockPoints 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 240 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 1175 of file validation.h.

◆ DeploymentActiveAt()

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

Definition at line 1181 of file validation.h.

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◆ DeploymentEnabled()

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

Definition at line 1187 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]heightGet the assumeutxo value for this height.
Returns
empty if no assumeutxo configuration exists for the given height.

Definition at line 4985 of file validation.cpp.

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◆ GetBlockSubsidy()

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

Definition at line 1550 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).

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

Definition at line 4935 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 3578 of file validation.cpp.

◆ InitScriptExecutionCache()

bool InitScriptExecutionCache ( size_t  max_size_bytes)

Initializes the script-execution cache.

Definition at line 1720 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 5626 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 5632 of file validation.cpp.

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◆ 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 details on package validation rules.

Parameters
[in]test_acceptWhen 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 1518 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 4072 of file validation.cpp.

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◆ StartScriptCheckWorkerThreads()

void StartScriptCheckWorkerThreads ( int  threads_num)

Run instances of script checking worker threads.

Definition at line 1961 of file validation.cpp.

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◆ StopScriptCheckWorkerThreads()

void StopScriptCheckWorkerThreads ( )

Stop all of the script checking worker threads.

Definition at line 1966 of file validation.cpp.

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◆ TestBlockValidity()

bool TestBlockValidity ( BlockValidationState state,
const CChainParams chainparams,
Chainstate chainstate,
const CBlock block,
CBlockIndex pindexPrev,
const std::function< NodeClock::time_point()> &  adjusted_time_callback,
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 4038 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]tipChain tip for which tx sequence locks are calculated. For example, the tip of the current active chain.
[in]coins_viewAny 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]txThe 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 288 of file validation.h.

◆ CHECKLEVEL_DOC

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

Documentation for argument 'checklevel'.

Definition at line 92 of file validation.cpp.

◆ DEFAULT_CHECKBLOCKS

const signed int DEFAULT_CHECKBLOCKS = 6
static

Definition at line 72 of file validation.h.

◆ DEFAULT_CHECKLEVEL

constexpr int DEFAULT_CHECKLEVEL {3}
staticconstexpr

Definition at line 73 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 67 of file validation.h.

◆ DEFAULT_STOPATHEIGHT

const int DEFAULT_STOPATHEIGHT = 0
static

Default for -stopatheight.

Definition at line 69 of file validation.h.

◆ g_best_block

uint256 g_best_block
extern

Used to notify getblocktemplate RPC of new tips.

Definition at line 109 of file validation.cpp.

◆ g_best_block_cv

std::condition_variable g_best_block_cv
extern

Definition at line 108 of file validation.cpp.

◆ g_best_block_mutex

GlobalMutex g_best_block_mutex
extern

Definition at line 107 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 65 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 71 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 82 of file validation.h.