chain.h File Reference

#include <arith_uint256.h>
#include <blockindex.h>
#include <blockstatus.h>
#include <blockvalidity.h>
#include <consensus/params.h>
#include <crypto/common.h>
#include <flatfile.h>
#include <primitives/block.h>
#include <sync.h>
#include <tinyformat.h>
#include <uint256.h>
#include <unordered_map>
#include <vector>

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Classes
struct	BlockHasher
	Maintain a map of CBlockIndex for all known headers. More...
class	CDiskBlockIndex
	Used to marshal pointers into hashes for db storage. More...
class	CChain
	An in-memory indexed chain of blocks. More...

Functions
arith_uint256	GetBlockProof (const CBlockIndex &block)
int64_t	GetBlockProofEquivalentTime (const CBlockIndex &to, const CBlockIndex &from, const CBlockIndex &tip, const Consensus::Params &)
	Return the time it would take to redo the work difference between from and to, assuming the current hashrate corresponds to the difficulty at tip, in seconds. More...
const CBlockIndex *	LastCommonAncestor (const CBlockIndex *pa, const CBlockIndex *pb)
	Find the forking point between two chain tips. More...
bool	AreOnTheSameFork (const CBlockIndex *pa, const CBlockIndex *pb)
	Check if two block index are on the same fork. More...

Variables
static constexpr int64_t	MAX_FUTURE_BLOCK_TIME = 2 * 60 * 60
	Maximum amount of time that a block timestamp is allowed to exceed the current network-adjusted time before the block will be accepted. More...
static constexpr int64_t	TIMESTAMP_WINDOW = MAX_FUTURE_BLOCK_TIME
	Timestamp window used as a grace period by code that compares external timestamps (such as timestamps passed to RPCs, or wallet key creation times) to block timestamps. More...
static constexpr int64_t	MAX_BLOCK_TIME_GAP = 90 * 60
	Maximum gap between node time and block time used for the "Catching up..." mode in GUI. More...
RecursiveMutex	cs_main
	Global state. More...

Function Documentation

AreOnTheSameFork()

bool AreOnTheSameFork	(	const CBlockIndex *	pa,
		const CBlockIndex *	pb
	)

Check if two block index are on the same fork.

Definition at line 142 of file chain.cpp.

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GetBlockProof()

arith_uint256 GetBlockProof

(

const CBlockIndex &

block

)

Definition at line 80 of file chain.cpp.

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GetBlockProofEquivalentTime()

int64_t GetBlockProofEquivalentTime	(	const CBlockIndex &	to,
		const CBlockIndex &	from,
		const CBlockIndex &	tip,
		const Consensus::Params &
	)

Return the time it would take to redo the work difference between from and to, assuming the current hashrate corresponds to the difficulty at tip, in seconds.

Definition at line 95 of file chain.cpp.

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LastCommonAncestor()

const CBlockIndex* LastCommonAncestor	(	const CBlockIndex *	pa,
		const CBlockIndex *	pb
	)

Find the forking point between two chain tips.

Find the forking point between two chain tips.

Both pa and pb must be non null.

Definition at line 118 of file chain.cpp.

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Variable Documentation

cs_main

RecursiveMutex cs_main

Global state.

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 103 of file validation.cpp.

MAX_BLOCK_TIME_GAP

constexpr int64_t MAX_BLOCK_TIME_GAP = 90 * 60

staticconstexpr

Maximum gap between node time and block time used for the "Catching up..." mode in GUI.

Ref: https://github.com/bitcoin/bitcoin/pull/1026

Definition at line 44 of file chain.h.

MAX_FUTURE_BLOCK_TIME

constexpr int64_t MAX_FUTURE_BLOCK_TIME = 2 * 60 * 60

staticconstexpr

Maximum amount of time that a block timestamp is allowed to exceed the current network-adjusted time before the block will be accepted.

Definition at line 28 of file chain.h.

TIMESTAMP_WINDOW

constexpr int64_t TIMESTAMP_WINDOW = MAX_FUTURE_BLOCK_TIME

staticconstexpr

Timestamp window used as a grace period by code that compares external timestamps (such as timestamps passed to RPCs, or wallet key creation times) to block timestamps.

This should be set at least as high as MAX_FUTURE_BLOCK_TIME.

Definition at line 36 of file chain.h.