text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2018 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 MEGACOIN_SCRIPT_BITCOINCONSENSUS_H
  #define MEGACOIN_SCRIPT_BITCOINCONSENSUS_H
  
  #include <stdint.h>
  
  #if defined(BUILD_BITCOIN_INTERNAL) && defined(HAVE_CONFIG_H)
  #include <config/bitcoin-config.h>
    #if defined(_WIN32)
      #if defined(DLL_EXPORT)
        #if defined(HAVE_FUNC_ATTRIBUTE_DLLEXPORT)
          #define EXPORT_SYMBOL __declspec(dllexport)
        #else
          #define EXPORT_SYMBOL
        #endif
      #endif
    #elif defined(HAVE_FUNC_ATTRIBUTE_VISIBILITY)
      #define EXPORT_SYMBOL __attribute__ ((visibility ("default")))
    #endif
  #elif defined(MSC_VER) && !defined(STATIC_LIBBITCOINCONSENSUS)
    #define EXPORT_SYMBOL __declspec(dllimport)
  #endif
  
  #ifndef EXPORT_SYMBOL
    #define EXPORT_SYMBOL
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define BITCOINCONSENSUS_API_VER 1
  
  typedef enum bitcoinconsensus_error_t
  {
      bitcoinconsensus_ERR_OK = 0,
      bitcoinconsensus_ERR_TX_INDEX,
      bitcoinconsensus_ERR_TX_SIZE_MISMATCH,
      bitcoinconsensus_ERR_TX_DESERIALIZE,
      bitcoinconsensus_ERR_AMOUNT_REQUIRED,
      bitcoinconsensus_ERR_INVALID_FLAGS,
  } bitcoinconsensus_error;
  
  /** Script verification flags */
  enum
  {
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_NONE                = 0,
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_P2SH                = (1U << 0), // evaluate P2SH (BIP16) subscripts
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_DERSIG              = (1U << 2), // enforce strict DER (BIP66) compliance
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_NULLDUMMY           = (1U << 4), // enforce NULLDUMMY (BIP147)
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKLOCKTIMEVERIFY = (1U << 9), // enable CHECKLOCKTIMEVERIFY (BIP65)
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKSEQUENCEVERIFY = (1U << 10), // enable CHECKSEQUENCEVERIFY (BIP112)
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS             = (1U << 11), // enable WITNESS (BIP141)
      bitcoinconsensus_SCRIPT_FLAGS_VERIFY_ALL                 = bitcoinconsensus_SCRIPT_FLAGS_VERIFY_P2SH | bitcoinconsensus_SCRIPT_FLAGS_VERIFY_DERSIG |
                                                                 bitcoinconsensus_SCRIPT_FLAGS_VERIFY_NULLDUMMY | bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKLOCKTIMEVERIFY |
                                                                 bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKSEQUENCEVERIFY | bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS
  };
  
  /// Returns 1 if the input nIn of the serialized transaction pointed to by
  /// txTo correctly spends the scriptPubKey pointed to by scriptPubKey under
  /// the additional constraints specified by flags.
  /// If not nullptr, err will contain an error/success code for the operation
  EXPORT_SYMBOL int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,
                                                   const unsigned char *txTo        , unsigned int txToLen,
                                                   unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err);
  
  EXPORT_SYMBOL int bitcoinconsensus_verify_script_with_amount(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, int64_t amount,
                                      const unsigned char *txTo        , unsigned int txToLen,
                                      unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err);
  
  EXPORT_SYMBOL unsigned int bitcoinconsensus_version();
  
  #ifdef __cplusplus
  } // extern "C"
  #endif
  
  #undef EXPORT_SYMBOL
  
  #endif // MEGACOIN_SCRIPT_BITCOINCONSENSUS_H
  