text: // Copyright (c) 2017-2019 The Zortcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef ZORTCOIn_WALLET_WALLETUTIL_H
  #define ZORTCOIn_WALLET_WALLETUTIL_H
  
  #include <fs.h>
  #include <script/descriptor.h>
  
  #include <vector>
  
  /** (client) version numbers for particular wallet features */
  enum WalletFeature
  {
      FEATURE_BASE = 10500, // the earliest version new wallets supports (only useful for getwalletinfo's clientversion output)
  
      FEATURE_WALLETCRYPT = 40000, // wallet encryption
      FEATURE_COMPRPUBKEY = 60000, // compressed public keys
  
      FEATURE_HD = 130000, // Hierarchical key derivation after BIP32 (HD Wallet)
  
      FEATURE_HD_SPLIT = 139900, // Wallet with HD chain split (change outputs will use m/0'/1'/k)
  
      FEATURE_NO_DEFAULT_KEY = 159900, // Wallet without a default key written
  
      FEATURE_PRE_SPLIT_KEYPOOL = 169900, // Upgraded to HD SPLIT and can have a pre-split keypool
  
      FEATURE_LATEST = FEATURE_PRE_SPLIT_KEYPOOL
  };
  
  bool IsFeatureSupported(int wallet_version, int feature_version);
  WalletFeature GetClosestWalletFeature(int version);
  
  enum WalletFlags : uint64_t {
      // wallet flags in the upper section (> 1 << 31) will lead to not opening the wallet if flag is unknown
      // unknown wallet flags in the lower section <= (1 << 31) will be tolerated
  
      // will categorize coins as clean (not reused) and dirty (reused), and handle
      // them with privacy considerations in mind
      WALLET_FLAG_AVOID_REUSE = (1ULL << 0),
  
      // Indicates that the metadata has already been upgraded to contain key origins
      WALLET_FLAG_KEY_ORIGIN_METADATA = (1ULL << 1),
  
      // will enforce the rule that the wallet can't contain any private keys (only watch-only/pubkeys)
      WALLET_FLAG_DISABLE_PRIVATE_KEYS = (1ULL << 32),
  
      //! Flag set when a wallet contains no HD seed and no private keys, scripts,
      //! addresses, and other watch only things, and is therefore "blank."
      //!
      //! The only function this flag serves is to distinguish a blank wallet from
      //! a newly created wallet when the wallet database is loaded, to avoid
      //! initialization that should only happen on first run.
      //!
      //! This flag is also a mandatory flag to prevent previous versions of
      //! zortcoin from opening the wallet, thinking it was newly created, and
      //! then improperly reinitializing it.
      WALLET_FLAG_BLANK_WALLET = (1ULL << 33),
  
      //! Indicate that this wallet supports DescriptorScriptPubKeyMan
      WALLET_FLAG_DESCRIPTORS = (1ULL << 34),
  };
  
  //! Get the path of the wallet directory.
  fs::path GetWalletDir();
  
  //! Get wallets in wallet directory.
  std::vector<fs::path> ListWalletDir();
  
  /** Descriptor with some wallet metadata */
  class WalletDescriptor
  {
  public:
      std::shared_ptr<Descriptor> descriptor;
      uint64_t creation_time = 0;
      int32_t range_start = 0; // First item in range; start of range, inclusive, i.e. [range_start, range_end). This never changes.
      int32_t range_end = 0; // Item after the last; end of range, exclusive, i.e. [range_start, range_end). This will increment with each TopUp()
      int32_t next_index = 0; // Position of the next item to generate
      DescriptorCache cache;
  
      void DeserializeDescriptor(const std::string& str)
      {
          std::string error;
          FlatSigningProvider keys;
          descriptor = Parse(str, keys, error, true);
          if (!descriptor) {
              throw std::ios_base::failure("Invalid descriptor: " + error);
          }
      }
  
      SERIALIZE_METHODS(WalletDescriptor, obj)
      {
          std::string descriptor_str;
          SER_WRITE(obj, descriptor_str = obj.descriptor->ToString());
          READWRITE(descriptor_str, obj.creation_time, obj.next_index, obj.range_start, obj.range_end);
          SER_READ(obj, obj.DeserializeDescriptor(descriptor_str));
      }
  
      WalletDescriptor() {}
      WalletDescriptor(std::shared_ptr<Descriptor> descriptor, uint64_t creation_time, int32_t range_start, int32_t range_end, int32_t next_index) : descriptor(descriptor), creation_time(creation_time), range_start(range_start), range_end(range_end), next_index(next_index) {}
  };
  
  #endif // ZORTCOIn_WALLET_WALLETUTIL_H
  