bitcoin-bitcoin-core/src/zmq/zmqrpc.cpp

// Copyright (c) 2018-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <zmq/zmqrpc.h>

#include <rpc/server.h>
#include <rpc/util.h>
#include <zmq/zmqabstractnotifier.h>
#include <zmq/zmqnotificationinterface.h>

#include <univalue.h>

#include <list>
#include <string>

class JSONRPCRequest;

namespace {

static RPCHelpMan getzmqnotifications()
{
    return RPCHelpMan{"getzmqnotifications",
                "\nReturns information about the active ZeroMQ notifications.\n",
                {},
                RPCResult{
                    RPCResult::Type::ARR, "", "",
                    {
                        {RPCResult::Type::OBJ, "", "",
                        {
                            {RPCResult::Type::STR, "type", "Type of notification"},
                            {RPCResult::Type::STR, "address", "Address of the publisher"},
                            {RPCResult::Type::NUM, "hwm", "Outbound message high water mark"},
                        }},
                    }
                },
                RPCExamples{
                    HelpExampleCli("getzmqnotifications", "")
            + HelpExampleRpc("getzmqnotifications", "")
                },
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    UniValue result(UniValue::VARR);
    if (g_zmq_notification_interface != nullptr) {
        for (const auto* n : g_zmq_notification_interface->GetActiveNotifiers()) {
            UniValue obj(UniValue::VOBJ);
            obj.pushKV("type", n->GetType());
            obj.pushKV("address", n->GetAddress());
            obj.pushKV("hwm", n->GetOutboundMessageHighWaterMark());
            result.push_back(obj);
        }
    }

    return result;
},
    };
}

const CRPCCommand commands[]{
    {"zmq", &getzmqnotifications},
};

} // anonymous namespace

void RegisterZMQRPCCommands(CRPCTable& t)
{
    for (const auto& c : commands) {
        t.appendCommand(c.name, &c);
    }
}