net_processing.h

// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Copyright (c) 2015-2020 The PIVX 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"

extern RecursiveMutex cs_main; // !TODO: change mutex to cs_orphans

/** Default for -maxorphantx, maximum number of orphan transactions kept in memory */
static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 25;
/** Expiration time for orphan transactions in seconds */
static const int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60;
/** Minimum time between orphan transactions expire time checks in seconds */
static const int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60;
/** Default for -blockspamfilter, use header spam filter */
static const bool DEFAULT_BLOCK_SPAM_FILTER = true;
/** Default for -blockspamfiltermaxsize, maximum size of the list of indexes in the block spam filter */
static const unsigned int DEFAULT_BLOCK_SPAM_FILTER_MAX_SIZE = 100;
/** Default for -blockspamfiltermaxavg, maximum average size of an index occurrence in the block spam filter */
static const unsigned int DEFAULT_BLOCK_SPAM_FILTER_MAX_AVG = 10;

/** Average delay between trickled inventory transmissions in seconds.
 *  Blocks and whitelisted receivers bypass this, outbound peers get half this delay. */
static const unsigned int INVENTORY_BROADCAST_INTERVAL = 5;
/** Maximum number of inventory items to send per transmission.
 *  Limits the impact of low-fee transaction floods. */
static const unsigned int INVENTORY_BROADCAST_MAX = 7 * INVENTORY_BROADCAST_INTERVAL;

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

public:
    PeerLogicValidation(CConnman* connman);
    ~PeerLogicValidation() = default;

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


    void InitializeNode(CNode* pnode) override;
    void FinalizeNode(NodeId nodeid, bool& fUpdateConnectionTime) override;
    /** Process protocol messages received from a given node */
    bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;
    /**
    * Send queued protocol messages to be sent to a give node.
    *
    * @param[in]   pto             The node which we are sending messages to.
    * @param[in]   interrupt       Interrupt condition for processing threads
    * @return                      True if there is more work to be done
    */
    bool SendMessages(CNode* pto, std::atomic<bool>& interrupt) override EXCLUSIVE_LOCKS_REQUIRED(pto->cs_sendProcessing);
};

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

/** Get statistics from node state */
bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats);
/** Increase a node's misbehavior score. */
void Misbehaving(NodeId nodeid, int howmuch, const std::string& message="") EXCLUSIVE_LOCKS_REQUIRED(cs_main);

#endif // BITCOIN_NET_PROCESSING_H