Bitcoin ABC  0.26.3
P2P Digital Currency
Public Member Functions | Public Attributes | Static Public Attributes | Private Attributes | List of all members
CBlockIndex Class Reference

The block chain is a tree shaped structure starting with the genesis block at the root, with each block potentially having multiple candidates to be the next block. More...

#include <blockindex.h>

Inheritance diagram for CBlockIndex:
[legend]
Collaboration diagram for CBlockIndex:
[legend]

Public Member Functions

 CBlockIndex ()=default
 
 CBlockIndex (const CBlockHeader &block)
 
FlatFilePos GetBlockPos () const
 
FlatFilePos GetUndoPos () const
 
CBlockHeader GetBlockHeader () const
 
BlockHash GetBlockHash () const
 
int64_t GetChainTxCount () const
 Get the number of transaction in the chain so far. More...
 
uint64_t GetChainSize () const
 Get the size of all the blocks in the chain so far. More...
 
bool UpdateChainStats ()
 Update chain tx stats. More...
 
bool HaveTxsDownloaded () const
 Check whether this block's and all previous blocks' transactions have been downloaded (and stored to disk) at some point. More...
 
int64_t GetBlockTime () const
 
int64_t GetBlockTimeMax () const
 
int64_t GetHeaderReceivedTime () const
 
int64_t GetReceivedTimeDiff () const
 
int64_t GetMedianTimePast () const
 
std::string ToString () const
 
bool IsValid (enum BlockValidity nUpTo=BlockValidity::TRANSACTIONS) const
 Check whether this block index entry is valid up to the passed validity level. More...
 
bool IsAssumedValid () const
 
bool RaiseValidity (enum BlockValidity nUpTo)
 Raise the validity level of this block index entry. More...
 
void BuildSkip ()
 Build the skiplist pointer for this entry. More...
 
CBlockIndexGetAncestor (int height)
 Efficiently find an ancestor of this block. More...
 
const CBlockIndexGetAncestor (int height) const
 

Public Attributes

const BlockHashphashBlock {nullptr}
 pointer to the hash of the block, if any. More...
 
CBlockIndexpprev {nullptr}
 pointer to the index of the predecessor of this block More...
 
CBlockIndexpskip {nullptr}
 pointer to the index of some further predecessor of this block More...
 
int nHeight {0}
 height of the entry in the chain. The genesis block has height 0 More...
 
int nFile {0}
 Which # file this block is stored in (blk?????.dat) More...
 
unsigned int nDataPos {0}
 Byte offset within blk?????.dat where this block's data is stored. More...
 
unsigned int nUndoPos {0}
 Byte offset within rev?????.dat where this block's undo data is stored. More...
 
arith_uint256 nChainWork {}
 (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block More...
 
unsigned int nTx {0}
 Number of transactions in this block. More...
 
unsigned int nSize {0}
 Size of this block. More...
 
unsigned int nChainTx {0}
 (memory only) Number of transactions in the chain up to and including this block. More...
 
BlockStatus nStatus {}
 Verification status of this block. See enum BlockStatus. More...
 
int32_t nVersion {0}
 block header More...
 
uint256 hashMerkleRoot {}
 
uint32_t nTime {0}
 
uint32_t nBits {0}
 
uint32_t nNonce {0}
 
int32_t nSequenceId {0}
 (memory only) Sequential id assigned to distinguish order in which blocks are received. More...
 
uint64_t nTimeReceived {0}
 (memory only) block header metadata More...
 
unsigned int nTimeMax {0}
 (memory only) Maximum nTime in the chain up to and including this block. More...
 

Static Public Attributes

static constexpr int nMedianTimeSpan = 11
 

Private Attributes

uint64_t nChainSize {0}
 (memory only) Size of all blocks in the chain up to and including this block. More...
 

Detailed Description

The block chain is a tree shaped structure starting with the genesis block at the root, with each block potentially having multiple candidates to be the next block.

A blockindex may have multiple pprev pointing to it, but at most one of them can be part of the currently active branch.

Definition at line 23 of file blockindex.h.

Constructor & Destructor Documentation

◆ CBlockIndex() [1/2]

CBlockIndex::CBlockIndex ( )
explicitdefault

◆ CBlockIndex() [2/2]

CBlockIndex::CBlockIndex ( const CBlockHeader block)
inlineexplicit

Definition at line 106 of file blockindex.h.

Member Function Documentation

◆ BuildSkip()

void CBlockIndex::BuildSkip ( )

Build the skiplist pointer for this entry.

Definition at line 76 of file blockindex.cpp.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GetAncestor() [1/2]

CBlockIndex * CBlockIndex::GetAncestor ( int  height)

Efficiently find an ancestor of this block.

Definition at line 71 of file blockindex.cpp.

Here is the caller graph for this function:

◆ GetAncestor() [2/2]

const CBlockIndex * CBlockIndex::GetAncestor ( int  height) const

Definition at line 45 of file blockindex.cpp.

Here is the call graph for this function:

◆ GetBlockHash()

BlockHash CBlockIndex::GetBlockHash ( ) const
inline

Definition at line 142 of file blockindex.h.

◆ GetBlockHeader()

CBlockHeader CBlockIndex::GetBlockHeader ( ) const
inline

Definition at line 129 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GetBlockPos()

FlatFilePos CBlockIndex::GetBlockPos ( ) const
inline

Definition at line 111 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GetBlockTime()

int64_t CBlockIndex::GetBlockTime ( ) const
inline

Definition at line 169 of file blockindex.h.

Here is the caller graph for this function:

◆ GetBlockTimeMax()

int64_t CBlockIndex::GetBlockTimeMax ( ) const
inline

Definition at line 171 of file blockindex.h.

Here is the caller graph for this function:

◆ GetChainSize()

uint64_t CBlockIndex::GetChainSize ( ) const
inline

Get the size of all the blocks in the chain so far.

Definition at line 152 of file blockindex.h.

◆ GetChainTxCount()

int64_t CBlockIndex::GetChainTxCount ( ) const
inline

Get the number of transaction in the chain so far.

Definition at line 147 of file blockindex.h.

Here is the caller graph for this function:

◆ GetHeaderReceivedTime()

int64_t CBlockIndex::GetHeaderReceivedTime ( ) const
inline

Definition at line 173 of file blockindex.h.

Here is the caller graph for this function:

◆ GetMedianTimePast()

int64_t CBlockIndex::GetMedianTimePast ( ) const
inline

Definition at line 181 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GetReceivedTimeDiff()

int64_t CBlockIndex::GetReceivedTimeDiff ( ) const
inline

Definition at line 175 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GetUndoPos()

FlatFilePos CBlockIndex::GetUndoPos ( ) const
inline

Definition at line 120 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ HaveTxsDownloaded()

bool CBlockIndex::HaveTxsDownloaded ( ) const
inline

Check whether this block's and all previous blocks' transactions have been downloaded (and stored to disk) at some point.

Does not imply the transactions are consensus-valid (ConnectTip might fail) Does not imply the transactions are still stored on disk. (IsBlockPruned might return true)

Definition at line 167 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ IsAssumedValid()

bool CBlockIndex::IsAssumedValid ( ) const
inline
Returns
true if the block is assumed-valid; this means it is queued to be validated by a background chainstate.

Definition at line 210 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ IsValid()

bool CBlockIndex::IsValid ( enum BlockValidity  nUpTo = BlockValidity::TRANSACTIONS) const
inline

Check whether this block index entry is valid up to the passed validity level.

Definition at line 204 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ RaiseValidity()

bool CBlockIndex::RaiseValidity ( enum BlockValidity  nUpTo)
inline

Raise the validity level of this block index entry.

Returns true if the validity was changed.

Definition at line 214 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ ToString()

std::string CBlockIndex::ToString ( ) const
inline

Definition at line 196 of file blockindex.h.

Here is the call graph for this function:
Here is the caller graph for this function:

◆ UpdateChainStats()

bool CBlockIndex::UpdateChainStats ( )

Update chain tx stats.

Definition at line 27 of file blockindex.cpp.

Here is the caller graph for this function:

Member Data Documentation

◆ hashMerkleRoot

uint256 CBlockIndex::hashMerkleRoot {}

Definition at line 89 of file blockindex.h.

◆ nBits

uint32_t CBlockIndex::nBits {0}

Definition at line 91 of file blockindex.h.

◆ nChainSize

uint64_t CBlockIndex::nChainSize {0}
private

(memory only) Size of all blocks in the chain up to and including this block.

This value will be non-zero only if and only if transactions for this block and all its parents are available.

Definition at line 81 of file blockindex.h.

◆ nChainTx

unsigned int CBlockIndex::nChainTx {0}

(memory only) Number of transactions in the chain up to and including this block.

This value will be non-zero only if and only if transactions for this block and all its parents are available. Change to 64-bit type when necessary; won't happen before 2030

Note: this value is faked during use of a UTXO snapshot because we don't have the underlying block data available during snapshot load.

See also
AssumeutxoData
ActivateSnapshot

Definition at line 75 of file blockindex.h.

◆ nChainWork

arith_uint256 CBlockIndex::nChainWork {}

(memory only) Total amount of work (expected number of hashes) in the chain up to and including this block

Definition at line 49 of file blockindex.h.

◆ nDataPos

unsigned int CBlockIndex::nDataPos {0}

Byte offset within blk?????.dat where this block's data is stored.

Definition at line 42 of file blockindex.h.

◆ nFile

int CBlockIndex::nFile {0}

Which # file this block is stored in (blk?????.dat)

Definition at line 39 of file blockindex.h.

◆ nHeight

int CBlockIndex::nHeight {0}

height of the entry in the chain. The genesis block has height 0

Definition at line 36 of file blockindex.h.

◆ nMedianTimeSpan

constexpr int CBlockIndex::nMedianTimeSpan = 11
staticconstexpr

Definition at line 179 of file blockindex.h.

◆ nNonce

uint32_t CBlockIndex::nNonce {0}

Definition at line 92 of file blockindex.h.

◆ nSequenceId

int32_t CBlockIndex::nSequenceId {0}

(memory only) Sequential id assigned to distinguish order in which blocks are received.

Definition at line 96 of file blockindex.h.

◆ nSize

unsigned int CBlockIndex::nSize {0}

Size of this block.

Note: in a potential headers-first mode, this number cannot be relied upon

Definition at line 63 of file blockindex.h.

◆ nStatus

BlockStatus CBlockIndex::nStatus {}

Verification status of this block. See enum BlockStatus.

Definition at line 85 of file blockindex.h.

◆ nTime

uint32_t CBlockIndex::nTime {0}

Definition at line 90 of file blockindex.h.

◆ nTimeMax

unsigned int CBlockIndex::nTimeMax {0}

(memory only) Maximum nTime in the chain up to and including this block.

Definition at line 102 of file blockindex.h.

◆ nTimeReceived

uint64_t CBlockIndex::nTimeReceived {0}

(memory only) block header metadata

Definition at line 99 of file blockindex.h.

◆ nTx

unsigned int CBlockIndex::nTx {0}

Number of transactions in this block.

Note: in a potential headers-first mode, this number cannot be relied upon Note: this value is faked during UTXO snapshot load to ensure that LoadBlockIndex() will load index entries for blocks that we lack data for.

See also
ActivateSnapshot

Definition at line 58 of file blockindex.h.

◆ nUndoPos

unsigned int CBlockIndex::nUndoPos {0}

Byte offset within rev?????.dat where this block's undo data is stored.

Definition at line 45 of file blockindex.h.

◆ nVersion

int32_t CBlockIndex::nVersion {0}

block header

Definition at line 88 of file blockindex.h.

◆ phashBlock

const BlockHash* CBlockIndex::phashBlock {nullptr}

pointer to the hash of the block, if any.

Memory is owned by this CBlockIndex

Definition at line 27 of file blockindex.h.

◆ pprev

CBlockIndex* CBlockIndex::pprev {nullptr}

pointer to the index of the predecessor of this block

Definition at line 30 of file blockindex.h.

◆ pskip

CBlockIndex* CBlockIndex::pskip {nullptr}

pointer to the index of some further predecessor of this block

Definition at line 33 of file blockindex.h.


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