text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2015 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef CLARITY_SCRIPT_SIGCACHE_H
  #define CLARITY_SCRIPT_SIGCACHE_H
  
  #include "script/interpreter.h"
  
  #include <vector>
  
  // DoS prevention: limit cache size to less than 40MB (over 500000
  // entries on 64-bit systems).
  static const unsigned int DEFAULT_MAX_SIG_CACHE_SIZE = 40;
  
  class CPubKey;
  
  class CachingTransactionSignatureChecker : public TransactionSignatureChecker
  {
  private:
      bool store;
  
  public:
      CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
  
      bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
  };
  
  #endif // CLARITY_SCRIPT_SIGCACHE_H
  