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_ZMQPUBLISHNOTIFIER_H
6#define BITCOIN_ZMQ_ZMQPUBLISHNOTIFIER_H
7
8#include <zmq/zmqabstractnotifier.h>
9
10#include <cstddef>
11#include <cstdint>
12#include <functional>
13#include <utility>
14#include <vector>
15
16class CBlockIndex;
17
18class CZMQAbstractPublishNotifier : public CZMQAbstractNotifier
19{
20private:
21    uint32_t nSequence {0U}; //!< upcounting per message sequence number
22
23public:
24
25    /* send zmq multipart message
26       parts:
27          * command
28          * data
29          * message sequence number
30    */
31    bool SendZmqMessage(const char *command, const void* data, size_t size);
32
33    bool Initialize(void *pcontext) override;
34    void Shutdown() override;
35};
36
37class CZMQPublishHashBlockNotifier : public CZMQAbstractPublishNotifier
38{
39public:
40    bool NotifyBlock(const CBlockIndex *pindex) override;
41};
42
43class CZMQPublishHashTransactionNotifier : public CZMQAbstractPublishNotifier
44{
45public:
46    bool NotifyTransaction(const CTransaction &transaction) override;
47};
48
49class CZMQPublishRawBlockNotifier : public CZMQAbstractPublishNotifier
50{
51private:
52    const std::function<bool(std::vector<std::byte>&, const CBlockIndex&)> m_get_block_by_index;
53
54public:
55    CZMQPublishRawBlockNotifier(std::function<bool(std::vector<std::byte>&, const CBlockIndex&)> get_block_by_index)
56        : m_get_block_by_index{std::move(get_block_by_index)} {}
57    bool NotifyBlock(const CBlockIndex *pindex) override;
58};
59
60class CZMQPublishRawTransactionNotifier : public CZMQAbstractPublishNotifier
61{
62public:
63    bool NotifyTransaction(const CTransaction &transaction) override;
64};
65
66class CZMQPublishSequenceNotifier : public CZMQAbstractPublishNotifier
67{
68public:
69    bool NotifyBlockConnect(const CBlockIndex *pindex) override;
70    bool NotifyBlockDisconnect(const CBlockIndex *pindex) override;
71    bool NotifyTransactionAcceptance(const CTransaction &transaction, uint64_t mempool_sequence) override;
72    bool NotifyTransactionRemoval(const CTransaction &transaction, uint64_t mempool_sequence) override;
73};
74
75#endif // BITCOIN_ZMQ_ZMQPUBLISHNOTIFIER_H
76