net_processing.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 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_NET_PROCESSING_H
#define BITCOIN_NET_PROCESSING_H

#include <net.h>
#include <validationinterface.h>
#include <consensus/params.h>

static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS_SIZE = 10; // this allows around 100 TXs of max size (and many more of normal size)
static const int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60;
static const int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60;
static const unsigned int DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN = 100;

static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000; // 15 minutes
static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000; // 1ms/header
static constexpr int32_t MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT = 4;
static constexpr int64_t CHAIN_SYNC_TIMEOUT = 20 * 60; // 20 minutes

static constexpr int64_t STALE_CHECK_INTERVAL = 150; // 2.5 minutes (~block interval)
static constexpr int64_t EXTRA_PEER_CHECK_INTERVAL = 45;
static constexpr int64_t MINIMUM_CONNECT_TIME = 30;

static constexpr bool DEFAULT_ENABLE_BIP61 = true;
extern bool g_enable_bip61;

class PeerLogicValidation : public CValidationInterface, public NetEventsInterface {
private:
    CConnman* const connman;

public:
    explicit PeerLogicValidation(CConnman* connmanIn, CScheduler &scheduler);

    void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
    void BlockChecked(const CBlock& block, const CValidationState& state) override;
    void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;


    void InitializeNode(CNode* pnode) override;
    void FinalizeNode(NodeId nodeid, bool& fUpdateConnectionTime) override;
    bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;
    bool SendMessages(CNode* pto, std::atomic<bool>& interrupt) override;

    void ConsiderEviction(CNode *pto, int64_t time_in_seconds);
    void CheckForStaleTipAndEvictPeers(const Consensus::Params &consensusParams);
    void EvictExtraOutboundPeers(int64_t time_in_seconds);

private:
    int64_t m_stale_tip_check_time; 
};

struct CNodeStateStats {
    int nMisbehavior;
    int nSyncHeight;
    int nCommonHeight;
    std::vector<int> vHeightInFlight;
};

bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats);
void Misbehaving(NodeId nodeid, int howmuch, const std::string& message="");
bool IsBanned(NodeId nodeid);

void EraseObjectRequest(NodeId nodeId, const CInv& inv);
void RequestObject(NodeId nodeId, const CInv& inv, std::chrono::microseconds current_time, bool fForce=false);
size_t GetRequestedObjectCount(NodeId nodeId);

#endif // BITCOIN_NET_PROCESSING_H