Data structure to cache SHA256 midstates for the ECDSA sighash calculations (bare, P2SH, P2WPKH, P2WSH). More...

#include <interpreter.h>

Public Member Functions
bool	Load (int32_t hash_type, const CScript &script_code, HashWriter &writer) const noexcept
	Load into writer the SHA256 midstate if found in this cache. More...

void	Store (int32_t hash_type, const CScript &script_code, const HashWriter &writer) noexcept
	Store into this cache object the provided SHA256 midstate. More...

Private Member Functions
int	CacheIndex (int32_t hash_type) const noexcept
	Given a hash_type, find which of the 6 cache entries is to be used. More...

Private Attributes
std::optional< std::pair< CScript, HashWriter > >	m_cache_entries [6]
	For each sighash mode (ALL, SINGLE, NONE, ALL\|ANYONE, SINGLE\|ANYONE, NONE\|ANYONE), optionally store a scriptCode which the hash is for, plus a midstate for the SHA256 computation just before adding the hash_type itself. More...

Detailed Description

Data structure to cache SHA256 midstates for the ECDSA sighash calculations (bare, P2SH, P2WPKH, P2WSH).

Definition at line 244 of file interpreter.h.

Member Function Documentation

◆ CacheIndex()

int SigHashCache::CacheIndex ( int32_t hash_type ) const

privatenoexcept

Given a hash_type, find which of the 6 cache entries is to be used.

Definition at line 1567 of file interpreter.cpp.

◆ Load()

bool SigHashCache::Load	(	int32_t	hash_type,
		const CScript &	script_code,
		HashWriter &	writer
	)		const

noexcept

Load into writer the SHA256 midstate if found in this cache.

Definition at line 1576 of file interpreter.cpp.

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◆ Store()

void SigHashCache::Store	(	int32_t	hash_type,
		const CScript &	script_code,
		const HashWriter &	writer
	)

noexcept

Store into this cache object the provided SHA256 midstate.

Definition at line 1588 of file interpreter.cpp.

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Member Data Documentation

◆ m_cache_entries

std::optional<std::pair<CScript, HashWriter> > SigHashCache::m_cache_entries[6]

private

For each sighash mode (ALL, SINGLE, NONE, ALL|ANYONE, SINGLE|ANYONE, NONE|ANYONE), optionally store a scriptCode which the hash is for, plus a midstate for the SHA256 computation just before adding the hash_type itself.

Definition at line 249 of file interpreter.h.

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

src/script/interpreter.h
src/script/interpreter.cpp

Public Member Functions

Private Member Functions