Adding ZMQ/Pub support for txpool_add and chain_main events

src/daemon/command_line_args.h

@@ -121,6 +121,10 @@ namespace daemon_args
       return val;
     }
   };
+  const command_line::arg_descriptor<std::vector<std::string>> arg_zmq_pub = {
+    "zmq-pub"
+  , "Address for ZMQ pub - tcp://ip:port or ipc://path"
+  };
 
   const command_line::arg_descriptor<bool> arg_zmq_rpc_disabled = {
     "no-zmq"

src/daemon/daemon.cpp

@@ -34,10 +34,12 @@
 #include "misc_log_ex.h"
 #include "daemon/daemon.h"
 #include "rpc/daemon_handler.h"
+#include "rpc/zmq_pub.h"
 #include "rpc/zmq_server.h"
 
 #include "common/password.h"
 #include "common/util.h"
+#include "cryptonote_basic/events.h"
 #include "daemon/core.h"
 #include "daemon/p2p.h"
 #include "daemon/protocol.h"
@@ -56,6 +58,17 @@ using namespace epee;
 
 namespace daemonize {
 
+struct zmq_internals
+{
+  explicit zmq_internals(t_core& core, t_p2p& p2p)
+    : rpc_handler{core.get(), p2p.get()}
+    , server{rpc_handler}
+  {}
+
+  cryptonote::rpc::DaemonHandler rpc_handler;
+  cryptonote::rpc::ZmqServer server;
+};
+
 struct t_internals {
 private:
   t_protocol protocol;
@@ -63,6 +76,7 @@ public:
   t_core core;
   t_p2p p2p;
   std::vector<std::unique_ptr<t_rpc>> rpcs;
+  std::unique_ptr<zmq_internals> zmq;
 
   t_internals(
       boost::program_options::variables_map const & vm
@@ -70,6 +84,7 @@ public:
     : core{vm}
     , protocol{vm, core, command_line::get_arg(vm, cryptonote::arg_offline)}
     , p2p{vm, protocol}
+    , zmq{nullptr}
   {
     // Handle circular dependencies
     protocol.set_p2p_endpoint(p2p.get());
@@ -86,6 +101,28 @@ public:
       auto restricted_rpc_port = command_line::get_arg(vm, restricted_rpc_port_arg);
       rpcs.emplace_back(new t_rpc{vm, core, p2p, true, restricted_rpc_port, "restricted", true});
     }
+
+    if (!command_line::get_arg(vm, daemon_args::arg_zmq_rpc_disabled))
+    {
+      zmq.reset(new zmq_internals{core, p2p});
+
+      const std::string zmq_port = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_port);
+      const std::string zmq_address = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_ip);
+
+      if (!zmq->server.init_rpc(zmq_address, zmq_port))
+        throw std::runtime_error{"Failed to add TCP socket(" + zmq_address + ":" + zmq_port + ") to ZMQ RPC Server"};
+
+      std::shared_ptr<cryptonote::listener::zmq_pub> shared;
+      const std::vector<std::string> zmq_pub = command_line::get_arg(vm, daemon_args::arg_zmq_pub);
+      if (!zmq_pub.empty() && !(shared = zmq->server.init_pub(epee::to_span(zmq_pub))))
+        throw std::runtime_error{"Failed to initialize zmq_pub"};
+
+      if (shared)
+      {
+        core.get().get_blockchain_storage().add_block_notify(cryptonote::listener::zmq_pub::chain_main{shared});
+        core.get().set_txpool_listener(cryptonote::listener::zmq_pub::txpool_add{shared});
+      }
+    }
   }
 };
 
@@ -103,9 +140,6 @@ t_daemon::t_daemon(
   : mp_internals{new t_internals{vm}},
   public_rpc_port(public_rpc_port)
 {
-  zmq_rpc_bind_port = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_port);
-  zmq_rpc_bind_address = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_ip);
-  zmq_rpc_disabled = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_disabled);
 }
 
 t_daemon::~t_daemon() = default;
@@ -169,31 +203,8 @@ bool t_daemon::run(bool interactive)
       rpc_commands->start_handling(std::bind(&daemonize::t_daemon::stop_p2p, this));
     }
 
-    cryptonote::rpc::DaemonHandler rpc_daemon_handler(mp_internals->core.get(), mp_internals->p2p.get());
-    cryptonote::rpc::ZmqServer zmq_server(rpc_daemon_handler);
-
-    if (!zmq_rpc_disabled)
-    {
-      if (!zmq_server.addTCPSocket(zmq_rpc_bind_address, zmq_rpc_bind_port))
-      {
-        LOG_ERROR(std::string("Failed to add TCP Socket (") + zmq_rpc_bind_address
-            + ":" + zmq_rpc_bind_port + ") to ZMQ RPC Server");
-
-        if (rpc_commands)
-          rpc_commands->stop_handling();
-
-        for(auto& rpc : mp_internals->rpcs)
-          rpc->stop();
-
-        return false;
-      }
-
-      MINFO("Starting ZMQ server...");
-      zmq_server.run();
-
-      MINFO(std::string("ZMQ server started at ") + zmq_rpc_bind_address
-            + ":" + zmq_rpc_bind_port + ".");
-    }
+    if (mp_internals->zmq)
+      mp_internals->zmq->server.run();
     else
       MINFO("ZMQ server disabled");
 
@@ -208,8 +219,8 @@ bool t_daemon::run(bool interactive)
     if (rpc_commands)
       rpc_commands->stop_handling();
 
-    if (!zmq_rpc_disabled)
-      zmq_server.stop();
+    if (mp_internals->zmq)
+      mp_internals->zmq->server.stop();
 
     for(auto& rpc : mp_internals->rpcs)
       rpc->stop();

src/daemon/daemon.h

@@ -44,9 +44,6 @@ private:
 private:
   std::unique_ptr<t_internals> mp_internals;
   uint16_t public_rpc_port;
-  std::string zmq_rpc_bind_address;
-  std::string zmq_rpc_bind_port;
-  bool zmq_rpc_disabled;
 public:
   t_daemon(
       boost::program_options::variables_map const & vm,

src/daemon/main.cpp

@@ -154,6 +154,7 @@ int main(int argc, char const * argv[])
       command_line::add_arg(core_settings, daemon_args::arg_public_node);
       command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_bind_ip);
       command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_bind_port);
+      command_line::add_arg(core_settings, daemon_args::arg_zmq_pub);
       command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_disabled);
 
       daemonizer::init_options(hidden_options, visible_options);