zmqnotificationinterface.h

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// Copyright (c) 2015-2022 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_ZMQ_ZMQNOTIFICATIONINTERFACE_H
#define BITCOIN_ZMQ_ZMQNOTIFICATIONINTERFACE_H
 
#include <primitives/transaction.h>
#include <validationinterface.h>
 
#include <cstdint>
#include <functional>
#include <list>
#include <memory>
#include <vector>
 
class CBlock;
class CBlockIndex;
class CZMQAbstractNotifier;
struct NewMempoolTransactionInfo;
 
class CZMQNotificationInterface final : public CValidationInterface
{
public:
    virtual ~CZMQNotificationInterface();
 
    std::list<const CZMQAbstractNotifier*> GetActiveNotifiers() const;
 
    static std::unique_ptr<CZMQNotificationInterface> Create(std::function<bool(std::vector<uint8_t>&, const CBlockIndex&)> get_block_by_index);
 
protected:
    bool Initialize();
    void Shutdown();
 
    // CValidationInterface
    void TransactionAddedToMempool(const NewMempoolTransactionInfo& tx, uint64_t mempool_sequence) override;
    void TransactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t mempool_sequence) override;
    void BlockConnected(ChainstateRole role, const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected) override;
    void BlockDisconnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexDisconnected) override;
    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
 
private:
    CZMQNotificationInterface();
 
    void* pcontext{nullptr};
    std::list<std::unique_ptr<CZMQAbstractNotifier>> notifiers;
};
 
extern std::unique_ptr<CZMQNotificationInterface> g_zmq_notification_interface;
 
#endif // BITCOIN_ZMQ_ZMQNOTIFICATIONINTERFACE_H