Bitcoin Core  24.99.0
P2P Digital Currency
sigcache.h
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1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2021 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 
6 #ifndef BITCOIN_SCRIPT_SIGCACHE_H
7 #define BITCOIN_SCRIPT_SIGCACHE_H
8 
9 #include <script/interpreter.h>
10 #include <span.h>
11 #include <util/hasher.h>
12 
13 #include <optional>
14 #include <vector>
15 
16 // DoS prevention: limit cache size to 32MiB (over 1000000 entries on 64-bit
17 // systems). Due to how we count cache size, actual memory usage is slightly
18 // more (~32.25 MiB)
19 static constexpr size_t DEFAULT_MAX_SIG_CACHE_BYTES{32 << 20};
20 
21 class CPubKey;
22 
24 {
25 private:
26  bool store;
27 
28 public:
29  CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, bool storeIn, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amountIn, txdataIn, MissingDataBehavior::ASSERT_FAIL), store(storeIn) {}
30 
31  bool VerifyECDSASignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const override;
32  bool VerifySchnorrSignature(Span<const unsigned char> sig, const XOnlyPubKey& pubkey, const uint256& sighash) const override;
33 };
34 
35 [[nodiscard]] bool InitSignatureCache(size_t max_size_bytes);
36 
37 #endif // BITCOIN_SCRIPT_SIGCACHE_H
int64_t CAmount
Amount in satoshis (Can be negative)
Definition: amount.h:12
An encapsulated public key.
Definition: pubkey.h:34
The basic transaction that is broadcasted on the network and contained in blocks.
Definition: transaction.h:288
bool VerifySchnorrSignature(Span< const unsigned char > sig, const XOnlyPubKey &pubkey, const uint256 &sighash) const override
Definition: sigcache.cpp:120
CachingTransactionSignatureChecker(const CTransaction *txToIn, unsigned int nInIn, const CAmount &amountIn, bool storeIn, PrecomputedTransactionData &txdataIn)
Definition: sigcache.h:29
bool VerifyECDSASignature(const std::vector< unsigned char > &vchSig, const CPubKey &vchPubKey, const uint256 &sighash) const override
Definition: sigcache.cpp:107
256-bit opaque blob.
Definition: uint256.h:119
MissingDataBehavior
Enum to specify what *TransactionSignatureChecker's behavior should be when dealing with missing tran...
Definition: interpreter.h:273
@ ASSERT_FAIL
Abort execution through assertion failure (for consensus code)
static constexpr size_t DEFAULT_MAX_SIG_CACHE_BYTES
Definition: sigcache.h:19
bool InitSignatureCache(size_t max_size_bytes)
Definition: sigcache.cpp:96