text: // Copyright (c) 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 BITCOIN_INTERFACES_NODE_H
  #define BITCOIN_INTERFACES_NODE_H
  
  #include <addrdb.h>     // For banmap_t
  #include <amount.h>     // For CAmount
  #include <net.h>        // For CConnman::NumConnections
  #include <netaddress.h> // For Network
  
  #include <functional>
  #include <memory>
  #include <stddef.h>
  #include <stdint.h>
  #include <string>
  #include <tuple>
  #include <vector>
  
  class CCoinControl;
  class CFeeRate;
  class CNodeStats;
  class Coin;
  class RPCTimerInterface;
  class UniValue;
  class proxyType;
  struct CNodeStateStats;
  
  namespace interfaces {
  class Handler;
  class Wallet;
  
  //! Top-level interface for a bitcoin node (bitcoind process).
  class Node
  {
  public:
      virtual ~Node() {}
  
      //! Set command line arguments.
      virtual bool parseParameters(int argc, const char* const argv[], std::string& error) = 0;
  
      //! Set a command line argument if it doesn't already have a value
      virtual bool softSetArg(const std::string& arg, const std::string& value) = 0;
  
      //! Set a command line boolean argument if it doesn't already have a value
      virtual bool softSetBoolArg(const std::string& arg, bool value) = 0;
  
      //! Load settings from configuration file.
      virtual bool readConfigFiles(std::string& error) = 0;
  
      //! Choose network parameters.
      virtual void selectParams(const std::string& network) = 0;
  
      //! Get network name.
      virtual std::string getNetwork() = 0;
  
      //! Init logging.
      virtual void initLogging() = 0;
  
      //! Init parameter interaction.
      virtual void initParameterInteraction() = 0;
  
      //! Get warnings.
      virtual std::string getWarnings(const std::string& type) = 0;
  
      // Get log flags.
      virtual uint32_t getLogCategories() = 0;
  
      //! Initialize app dependencies.
      virtual bool baseInitialize() = 0;
  
      //! Start node.
      virtual bool appInitMain() = 0;
  
      //! Stop node.
      virtual void appShutdown() = 0;
  
      //! Start shutdown.
      virtual void startShutdown() = 0;
  
      //! Return whether shutdown was requested.
      virtual bool shutdownRequested() = 0;
  
      //! Setup arguments
      virtual void setupServerArgs() = 0;
  
      //! Map port.
      virtual void mapPort(bool use_upnp) = 0;
  
      //! Get proxy.
      virtual bool getProxy(Network net, proxyType& proxy_info) = 0;
  
      //! Get number of connections.
      virtual size_t getNodeCount(CConnman::NumConnections flags) = 0;
  
      //! Get stats for connected nodes.
      using NodesStats = std::vector<std::tuple<CNodeStats, bool, CNodeStateStats>>;
      virtual bool getNodesStats(NodesStats& stats) = 0;
  
      //! Get ban map entries.
      virtual bool getBanned(banmap_t& banmap) = 0;
  
      //! Ban node.
      virtual bool ban(const CNetAddr& net_addr, BanReason reason, int64_t ban_time_offset) = 0;
  
      //! Unban node.
      virtual bool unban(const CSubNet& ip) = 0;
  
      //! Disconnect node.
      virtual bool disconnect(NodeId id) = 0;
  
      //! Get total bytes recv.
      virtual int64_t getTotalBytesRecv() = 0;
  
      //! Get total bytes sent.
      virtual int64_t getTotalBytesSent() = 0;
  
      //! Get mempool size.
      virtual size_t getMempoolSize() = 0;
  
      //! Get mempool dynamic usage.
      virtual size_t getMempoolDynamicUsage() = 0;
  
      //! Get header tip height and time.
      virtual bool getHeaderTip(int& height, int64_t& block_time) = 0;
  
      //! Get num blocks.
      virtual int getNumBlocks() = 0;
  
      //! Get last block time.
      virtual int64_t getLastBlockTime() = 0;
  
      //! Get verification progress.
      virtual double getVerificationProgress() = 0;
  
      //! Is initial block download.
      virtual bool isInitialBlockDownload() = 0;
  
      //! Get reindex.
      virtual bool getReindex() = 0;
  
      //! Get importing.
      virtual bool getImporting() = 0;
  
      //! Set network active.
      virtual void setNetworkActive(bool active) = 0;
  
      //! Get network active.
      virtual bool getNetworkActive() = 0;
  
      //! Get max tx fee.
      virtual CAmount getMaxTxFee() = 0;
  
      //! Estimate smart fee.
      virtual CFeeRate estimateSmartFee(int num_blocks, bool conservative, int* returned_target = nullptr) = 0;
  
      //! Get dust relay fee.
      virtual CFeeRate getDustRelayFee() = 0;
  
      //! Execute rpc command.
      virtual UniValue executeRpc(const std::string& command, const UniValue& params, const std::string& uri) = 0;
  
      //! List rpc commands.
      virtual std::vector<std::string> listRpcCommands() = 0;
  
      //! Set RPC timer interface if unset.
      virtual void rpcSetTimerInterfaceIfUnset(RPCTimerInterface* iface) = 0;
  
      //! Unset RPC timer interface.
      virtual void rpcUnsetTimerInterface(RPCTimerInterface* iface) = 0;
  
      //! Get unspent outputs associated with a transaction.
      virtual bool getUnspentOutput(const COutPoint& output, Coin& coin) = 0;
  
      //! Return interfaces for accessing wallets (if any).
      virtual std::vector<std::unique_ptr<Wallet>> getWallets() = 0;
  
      //! Register handler for init messages.
      using InitMessageFn = std::function<void(const std::string& message)>;
      virtual std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) = 0;
  
      //! Register handler for message box messages.
      using MessageBoxFn =
          std::function<bool(const std::string& message, const std::string& caption, unsigned int style)>;
      virtual std::unique_ptr<Handler> handleMessageBox(MessageBoxFn fn) = 0;
  
      //! Register handler for question messages.
      using QuestionFn = std::function<bool(const std::string& message,
          const std::string& non_interactive_message,
          const std::string& caption,
          unsigned int style)>;
      virtual std::unique_ptr<Handler> handleQuestion(QuestionFn fn) = 0;
  
      //! Register handler for progress messages.
      using ShowProgressFn = std::function<void(const std::string& title, int progress, bool resume_possible)>;
      virtual std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) = 0;
  
      //! Register handler for load wallet messages.
      using LoadWalletFn = std::function<void(std::unique_ptr<Wallet> wallet)>;
      virtual std::unique_ptr<Handler> handleLoadWallet(LoadWalletFn fn) = 0;
  
      //! Register handler for number of connections changed messages.
      using NotifyNumConnectionsChangedFn = std::function<void(int new_num_connections)>;
      virtual std::unique_ptr<Handler> handleNotifyNumConnectionsChanged(NotifyNumConnectionsChangedFn fn) = 0;
  
      //! Register handler for network active messages.
      using NotifyNetworkActiveChangedFn = std::function<void(bool network_active)>;
      virtual std::unique_ptr<Handler> handleNotifyNetworkActiveChanged(NotifyNetworkActiveChangedFn fn) = 0;
  
      //! Register handler for notify alert messages.
      using NotifyAlertChangedFn = std::function<void()>;
      virtual std::unique_ptr<Handler> handleNotifyAlertChanged(NotifyAlertChangedFn fn) = 0;
  
      //! Register handler for ban list messages.
      using BannedListChangedFn = std::function<void()>;
      virtual std::unique_ptr<Handler> handleBannedListChanged(BannedListChangedFn fn) = 0;
  
      //! Register handler for block tip messages.
      using NotifyBlockTipFn =
          std::function<void(bool initial_download, int height, int64_t block_time, double verification_progress)>;
      virtual std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) = 0;
  
      //! Register handler for header tip messages.
      using NotifyHeaderTipFn =
          std::function<void(bool initial_download, int height, int64_t block_time, double verification_progress)>;
      virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;
  
      // Dash
      //! Register handler for additional data sync progress messages.
      using NotifyAdditionalDataSyncProgressChangedFn = std::function<void(double nSyncProgress)>;
      virtual std::unique_ptr<Handler> handleNotifyAdditionalDataSyncProgressChanged(NotifyAdditionalDataSyncProgressChangedFn fn) = 0;
      //
  };
  
  //! Return implementation of Node interface.
  std::unique_ptr<Node> MakeNode();
  
  } // namespace interfaces
  
  #endif // BITCOIN_INTERFACES_NODE_H
  