dash/src/interface/node.h

// 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_INTERFACE_NODE_H
#define BITCOIN_INTERFACE_NODE_H

#include <addrdb.h>     // For banmap_t
#include <init.h>       // For HelpMessageMode
#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 CDeterministicMNList;
class CNodeStats;
class proxyType;
struct CNodeStateStats;

namespace interface {

class Handler;
class Wallet;

//! Top-level interface for a bitcoin node (bitcoind process).
class Node
{
public:
    virtual ~Node() {}

    //! Set command line arguments.
    virtual void parseParameters(int argc, const char* const argv[]) = 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 void readConfigFile(const std::string& conf_path) = 0;

    //! Choose network parameters.
    virtual void selectParams(const std::string& network) = 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;

    //! 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;

    //! Get help message string.
    virtual std::string helpMessage(HelpMessageMode mode) = 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;

    //! 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 last block hash.
    virtual std::string getLastBlockHash() = 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;

    //! 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, const std::string& block_hash, 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, const std::string& block_hash, double verification_progress)>;
    virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;

    //! Register handler for masternode list update messages.
    using NotifyMasternodeListChangedFn =
        std::function<void(const CDeterministicMNList& newList)>;
    virtual std::unique_ptr<Handler> handleNotifyMasternodeListChanged(NotifyMasternodeListChangedFn fn) = 0;

    //! Register handler for additional data sync progress update 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 interface

#endif // BITCOIN_INTERFACE_NODE_H