report block height reported by oxend in systemd status

llarp/router/router.cpp

@@ -735,7 +735,8 @@ namespace llarp
       {
         ss << " snode | known/svc/clients: " << nodedb()->NumLoaded() << "/"
            << NumberOfConnectedRouters() << "/" << NumberOfConnectedClients() << " | "
-           << pathContext().CurrentTransitPaths() << " active paths";
+           << pathContext().CurrentTransitPaths() << " active paths | "
+           << "block " << m_lokidRpcClient->BlockHeight();
       }
       else
       {

llarp/rpc/lokid_rpc_client.cpp

@@ -83,7 +83,17 @@ namespace llarp
             " parts instead of 2 parts so we will not update the list of service nodes");
         return;  // bail
       }
-      LogDebug("new block at hieght ", msg.data[0]);
+      try
+      {
+        m_BlockHeight = std::stoll(std::string{msg.data[0]});
+      }
+      catch (std::exception& ex)
+      {
+        LogError("bad block hieght: ", ex.what());
+        return;  // bail
+      }
+
+      LogDebug("new block at hieght ", m_BlockHeight);
       // don't upadate on block notification if an update is pending
       if (not m_UpdatingList)
         UpdateServiceNodeList(std::string{msg.data[1]});

llarp/rpc/lokid_rpc_client.hpp

@@ -30,6 +30,13 @@ namespace llarp
       SecretKey
       ObtainIdentityKey();
 
+      /// get what the current block height is according to oxend
+      uint64_t
+      BlockHeight() const
+      {
+        return m_BlockHeight;
+      }
+
       void
       LookupLNSNameHash(
           dht::Key_t namehash,
@@ -77,6 +84,8 @@ namespace llarp
 
       AbstractRouter* const m_Router;
       std::atomic<bool> m_UpdatingList;
+
+      uint64_t m_BlockHeight;
     };
 
   }  // namespace rpc