scriptcache.h

// Copyright (c) 2017 - The Bitcoin Developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_SCRIPT_SCRIPTCACHE_H
#define BITCOIN_SCRIPT_SCRIPTCACHE_H

#include <uint256.h>

#include <cstdint>

class CTransaction;

// DoS prevention: limit cache size to 32MB (over 1000000 entries on 64-bit
// systems). Due to how we count cache size, actual memory usage is slightly
// more (~32.25 MB)
static const unsigned int DEFAULT_MAX_SCRIPT_CACHE_SIZE = 32;
// Maximum sig cache size allowed
static const int64_t MAX_MAX_SCRIPT_CACHE_SIZE = 16384;

/** Initializes the script-execution cache */
void InitScriptExecutionCache();

/** Compute the cache key for a given transaction and flags. */
uint256 GetScriptCacheKey(const CTransaction &tx, uint32_t flags);

/** Check if a given key is in the cache. */
bool IsKeyInScriptCache(uint256 key, bool erase);

/** Add an entry in the cache. */
void AddKeyInScriptCache(uint256 key);

#endif // BITCOIN_SCRIPT_SCRIPTCACHE_H