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37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2021 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_SCRIPT_SIGCACHE_H
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#define BITCOIN_SCRIPT_SIGCACHE_H
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#include <script/interpreter.h>
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#include <span.h>
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#include <util/hasher.h>
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#include <optional>
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#include <vector>
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// DoS prevention: limit cache size to 32MiB (over 1000000 entries on 64-bit
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// systems). Due to how we count cache size, actual memory usage is slightly
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// more (~32.25 MiB)
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static constexpr size_t DEFAULT_MAX_SIG_CACHE_BYTES{32 << 20};
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class CPubKey;
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class CachingTransactionSignatureChecker : public TransactionSignatureChecker
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{
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private:
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bool store;
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public:
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CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, bool storeIn, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amountIn, txdataIn, MissingDataBehavior::ASSERT_FAIL), store(storeIn) {}
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bool VerifyECDSASignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const override;
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bool VerifySchnorrSignature(Span<const unsigned char> sig, const XOnlyPubKey& pubkey, const uint256& sighash) const override;
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};
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[[nodiscard]] bool InitSignatureCache(size_t max_size_bytes);
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#endif // BITCOIN_SCRIPT_SIGCACHE_H
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