node.h

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// Copyright (c) 2018-2020 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 <amount.h>     // For CAmount
#include <external_signer.h>
#include <net.h>        // For NodeId
#include <net_types.h>  // For banmap_t
#include <netaddress.h> // For Network
#include <netbase.h>    // For ConnectionDirection
#include <support/allocators/secure.h> // For SecureString
#include <util/translation.h>

#include <functional>
#include <memory>
#include <stddef.h>
#include <stdint.h>
#include <string>
#include <tuple>
#include <vector>

class BanMan;
class CCoinControl;
class CFeeRate;
class CNodeStats;
class Coin;
class RPCTimerInterface;
class UniValue;
class proxyType;
enum class SynchronizationState;
struct CNodeStateStats;
struct NodeContext;
struct bilingual_str;

namespace interfaces {
class Handler;
class WalletClient;
struct BlockTip;

struct BlockAndHeaderTipInfo
{
    int block_height;
    int64_t block_time;
    int header_height;
    int64_t header_time;
    double verification_progress;
};

class Node
{
public:
    virtual ~Node() {}

    virtual void initLogging() = 0;

    virtual void initParameterInteraction() = 0;

    virtual bilingual_str getWarnings() = 0;

    // Get log flags.
    virtual uint32_t getLogCategories() = 0;

    virtual bool baseInitialize() = 0;

    virtual bool appInitMain(interfaces::BlockAndHeaderTipInfo* tip_info = nullptr) = 0;

    virtual void appShutdown() = 0;

    virtual void startShutdown() = 0;

    virtual bool shutdownRequested() = 0;

    virtual void mapPort(bool use_upnp, bool use_natpmp) = 0;

    virtual bool getProxy(Network net, proxyType& proxy_info) = 0;

    virtual size_t getNodeCount(ConnectionDirection flags) = 0;

    using NodesStats = std::vector<std::tuple<CNodeStats, bool, CNodeStateStats>>;
    virtual bool getNodesStats(NodesStats& stats) = 0;

    virtual bool getBanned(banmap_t& banmap) = 0;

    virtual bool ban(const CNetAddr& net_addr, int64_t ban_time_offset) = 0;

    virtual bool unban(const CSubNet& ip) = 0;

    virtual bool disconnectByAddress(const CNetAddr& net_addr) = 0;

    virtual bool disconnectById(NodeId id) = 0;

    virtual std::vector<ExternalSigner> externalSigners() = 0;

    virtual int64_t getTotalBytesRecv() = 0;

    virtual int64_t getTotalBytesSent() = 0;

    virtual size_t getMempoolSize() = 0;

    virtual size_t getMempoolDynamicUsage() = 0;

    virtual bool getHeaderTip(int& height, int64_t& block_time) = 0;

    virtual int getNumBlocks() = 0;

    virtual uint256 getBestBlockHash() = 0;

    virtual int64_t getLastBlockTime() = 0;

    virtual double getVerificationProgress() = 0;

    virtual bool isInitialBlockDownload() = 0;

    virtual bool getReindex() = 0;

    virtual bool getImporting() = 0;

    virtual void setNetworkActive(bool active) = 0;

    virtual bool getNetworkActive() = 0;

    virtual CFeeRate getDustRelayFee() = 0;

    virtual UniValue executeRpc(const std::string& command, const UniValue& params, const std::string& uri) = 0;

    virtual std::vector<std::string> listRpcCommands() = 0;

    virtual void rpcSetTimerInterfaceIfUnset(RPCTimerInterface* iface) = 0;

    virtual void rpcUnsetTimerInterface(RPCTimerInterface* iface) = 0;

    virtual bool getUnspentOutput(const COutPoint& output, Coin& coin) = 0;

    virtual WalletClient& walletClient() = 0;

    using InitMessageFn = std::function<void(const std::string& message)>;
    virtual std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) = 0;

    using MessageBoxFn =
        std::function<bool(const bilingual_str& message, const std::string& caption, unsigned int style)>;
    virtual std::unique_ptr<Handler> handleMessageBox(MessageBoxFn fn) = 0;

    using QuestionFn = std::function<bool(const bilingual_str& message,
        const std::string& non_interactive_message,
        const std::string& caption,
        unsigned int style)>;
    virtual std::unique_ptr<Handler> handleQuestion(QuestionFn fn) = 0;

    using ShowProgressFn = std::function<void(const std::string& title, int progress, bool resume_possible)>;
    virtual std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) = 0;

    using NotifyNumConnectionsChangedFn = std::function<void(int new_num_connections)>;
    virtual std::unique_ptr<Handler> handleNotifyNumConnectionsChanged(NotifyNumConnectionsChangedFn fn) = 0;

    using NotifyNetworkActiveChangedFn = std::function<void(bool network_active)>;
    virtual std::unique_ptr<Handler> handleNotifyNetworkActiveChanged(NotifyNetworkActiveChangedFn fn) = 0;

    using NotifyAlertChangedFn = std::function<void()>;
    virtual std::unique_ptr<Handler> handleNotifyAlertChanged(NotifyAlertChangedFn fn) = 0;

    using BannedListChangedFn = std::function<void()>;
    virtual std::unique_ptr<Handler> handleBannedListChanged(BannedListChangedFn fn) = 0;

    using NotifyBlockTipFn =
        std::function<void(SynchronizationState, interfaces::BlockTip tip, double verification_progress)>;
    virtual std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) = 0;

    using NotifyHeaderTipFn =
        std::function<void(SynchronizationState, interfaces::BlockTip tip, double verification_progress)>;
    virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;

    virtual NodeContext* context() { return nullptr; }
    virtual void setContext(NodeContext* context) { }
};

std::unique_ptr<Node> MakeNode(NodeContext* context = nullptr);

struct BlockTip {
    int block_height;
    int64_t block_time;
    uint256 block_hash;
};

} // namespace interfaces

#endif // BITCOIN_INTERFACES_NODE_H