Add explicit started state for wakunode2

waku/v2/node/wakunode2.nim

@@ -66,6 +66,7 @@ type
     filters*: Filters
     subscriptions*: MessageNotificationSubscriptions
     rng*: ref BrHmacDrbgContext
+    started*: bool # Indicates that node has started listening
 
 # NOTE Any difference here in Waku vs Eth2?
 # E.g. Devp2p/Libp2p support, etc.
@@ -164,13 +165,17 @@ proc start*(node: WakuNode) {.async.} =
 
   if not node.wakuRelay.isNil:
     await node.wakuRelay.start()
+
+  node.started = true
 
 proc stop*(node: WakuNode) {.async.} =
   if not node.wakuRelay.isNil:
     await node.wakuRelay.stop()
 
   await node.switch.stop()
 
+  node.started = false
+
 proc subscribe*(node: WakuNode, topic: Topic, handler: TopicHandler) =
   ## Subscribes to a PubSub topic. Triggers handler when receiving messages on
   ## this topic. TopicHandler is a method that takes a topic and some data.
@@ -419,7 +424,7 @@ proc mountRelay*(node: WakuNode, topics: seq[string] = newSeq[string](), rlnRela
     addRLNRelayValidator(node, defaultTopic)
     info "WakuRLNRelay is mounted successfully"
 
-  if node.libp2pTransportLoops.len > 0:
+  if node.started:
     # Node has already started. Start the WakuRelay protocol
 
     waitFor node.wakuRelay.start()