small cleanups from tcp-limits2 (#446)

libp2p/muxers/mplex/lpchannel.nim

@@ -216,6 +216,6 @@ proc init*(
   when chronicles.enabledLogLevel == LogLevel.TRACE:
     chann.name = if chann.name.len > 0: chann.name else: $chann.oid
 
-  trace "Created new lpchannel", chann, id, initiator
+  trace "Created new lpchannel", s = chann, id, initiator
 
   return chann

libp2p/protocols/pubsub/floodsub.nim

@@ -117,7 +117,7 @@ method init*(f: FloodSub) =
       await f.handleConn(conn, proto)
     except CancelledError:
       # This is top-level procedure which will work as separate task, so it
-      # do not need to propogate CancelledError.
+      # do not need to propagate CancelledError.
       trace "Unexpected cancellation in floodsub handler", conn
     except CatchableError as exc:
       trace "FloodSub handler leaks an error", exc = exc.msg, conn

libp2p/protocols/pubsub/gossipsub.nim

@@ -32,7 +32,7 @@ const
   GossipSubCodec_10* = "/meshsub/1.0.0"
 
 # overlay parameters
-const 
+const
   GossipSubD* = 6
   GossipSubDlo* = 4
   GossipSubDhi* = 12
@@ -447,7 +447,7 @@ proc rebalanceMesh(g: GossipSub, topic: string) {.async.} =
     meshPeers.keepIf do (x: PubSubPeer) -> bool: x.outbound
     if meshPeers.len < g.parameters.dOut:
       trace "replenishing mesh outbound quota", peers = g.mesh.peers(topic)
-      
+
       grafts = toSeq(
         g.gossipsub.getOrDefault(topic, initHashSet[PubSubPeer]()) -
         g.mesh.getOrDefault(topic, initHashSet[PubSubPeer]())
@@ -508,7 +508,7 @@ proc rebalanceMesh(g: GossipSub, topic: string) {.async.} =
           inbound &= peer
 
       # ensure that there are at least D_out peers first and rebalance to g.d after that
-      let maxOutboundPrunes = 
+      let maxOutboundPrunes =
         block:
           var count = 0
           for peer in mesh:
@@ -815,7 +815,7 @@ proc heartbeat(g: GossipSub) {.async.} =
         g.broadcast(prunes, prune)
 
         await g.rebalanceMesh(t)
-      
+
       libp2p_gossipsub_peers_mesh_sum.set(totalMeshPeers.int64)
       libp2p_gossipsub_peers_gossipsub_sum.set(totalGossipPeers.int64)
 
@@ -836,7 +836,8 @@ proc heartbeat(g: GossipSub) {.async.} =
     except CancelledError as exc:
       raise exc
     except CatchableError as exc:
-      warn "exception ocurred in gossipsub heartbeat", exc = exc.msg, trace = exc.getStackTrace()
+      warn "exception ocurred in gossipsub heartbeat", exc = exc.msg,
+                                                       trace = exc.getStackTrace()
 
     for trigger in g.heartbeatEvents:
       trace "firing heartbeat event", instance = cast[int](g)
@@ -961,7 +962,7 @@ proc handleGraft(g: GossipSub,
         backoff: g.parameters.pruneBackoff.seconds.uint64))
 
       g.punishPeer(peer, @[topic])
-      
+
       continue
 
     if peer.peerId in g.backingOff and g.backingOff[peer.peerId] > Moment.now():
@@ -973,9 +974,9 @@ proc handleGraft(g: GossipSub,
         topicID: graft.topicID,
         peers: @[], # omitting heavy computation here as the remote did something illegal
         backoff: g.parameters.pruneBackoff.seconds.uint64))
-      
+
       g.punishPeer(peer, @[topic])
-      
+
       continue
 
     if peer notin g.peerStats:
@@ -1055,8 +1056,8 @@ proc handleIHave(g: GossipSub,
               dec peer.iHaveBudget
             else:
               return
-    
+
-    # shuffling result.messageIDs before sending it out to increase the likelihood 
+    # shuffling result.messageIDs before sending it out to increase the likelihood
     # of getting an answer if the peer truncates the list due to internal size restrictions.
     shuffle(result.messageIDs)
 

libp2p/protocols/pubsub/pubsubpeer.nim

@@ -129,7 +129,7 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
       await conn.close()
   except CancelledError:
     # This is top-level procedure which will work as separate task, so it
-    # do not need to propogate CancelledError.
+    # do not need to propagate CancelledError.
     trace "Unexpected cancellation in PubSubPeer.handle"
   except CatchableError as exc:
     trace "Exception occurred in PubSubPeer.handle",
@@ -193,6 +193,13 @@ proc sendImpl(conn: Connection, encoded: seq[byte]) {.async.} =
 
     await conn.close() # This will clean up the send connection
 
+template sendMetrics(msg: RPCMsg): untyped =
+  when defined(libp2p_expensive_metrics):
+    for x in msg.messages:
+      for t in x.topicIDs:
+        # metrics
+        libp2p_pubsub_sent_messages.inc(labelValues = [$p.peerId, t])
+
 proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) =
   doAssert(not isNil(p), "pubsubpeer nil!")
 
@@ -209,13 +216,15 @@ proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) =
   # some forms of valid but redundantly encoded protobufs with unknown or
   # duplicated fields
   let encoded = if p.hasObservers():
+    var mm = msg
     # trigger send hooks
-    var mm = msg # hooks can modify the message
     p.sendObservers(mm)
+    sendMetrics(mm)
     encodeRpcMsg(mm, anonymize)
   else:
     # If there are no send hooks, we redundantly re-encode the message to
     # protobuf for every peer - this could easily be improved!
+    sendMetrics(msg)
     encodeRpcMsg(msg, anonymize)
 
   if encoded.len <= 0:
@@ -226,12 +235,6 @@ proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) =
   # connection to the spawned send task
   asyncSpawn sendImpl(conn, encoded)
 
-  when defined(libp2p_expensive_metrics):
-    for x in msg.messages:
-      for t in x.topicIDs:
-        # metrics
-        libp2p_pubsub_sent_messages.inc(labelValues = [$p.peerId, t])
-
 proc newPubSubPeer*(peerId: PeerID,
                     getConn: GetConn,
                     onEvent: OnEvent,