Inside Bitcoin

1// Copyright (c) 2015-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_ZMQ_ZMQNOTIFICATIONINTERFACE_H
6#define BITCOIN_ZMQ_ZMQNOTIFICATIONINTERFACE_H
7
8#include <primitives/transaction.h>
9#include <validationinterface.h>
10
11#include <cstddef>
12#include <cstdint>
13#include <functional>
14#include <list>
15#include <memory>
16#include <vector>
17
18class CBlockIndex;
19class CZMQAbstractNotifier;
20
21class CZMQNotificationInterface final : public CValidationInterface
22{
23public:
24    ~CZMQNotificationInterface();
25
26    std::list<const CZMQAbstractNotifier*> GetActiveNotifiers() const;
27
28    static std::unique_ptr<CZMQNotificationInterface> Create(std::function<bool(std::vector<std::byte>&, const CBlockIndex&)> get_block_by_index);
29
30protected:
31    bool Initialize();
32    void Shutdown();
33
34    // CValidationInterface
35    void TransactionAddedToMempool(const NewMempoolTransactionInfo& tx, uint64_t mempool_sequence) override;
36    void TransactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t mempool_sequence) override;
37    void BlockConnected(const kernel::ChainstateRole& role, const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected) override;
38    void BlockDisconnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexDisconnected) override;
39    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
40
41private:
42    CZMQNotificationInterface();
43
44    void* pcontext{nullptr};
45    std::list<std::unique_ptr<CZMQAbstractNotifier>> notifiers;
46};
47
48extern std::unique_ptr<CZMQNotificationInterface> g_zmq_notification_interface;
49
50#endif // BITCOIN_ZMQ_ZMQNOTIFICATIONINTERFACE_H
51