swarm/network/stream: addressed PR comments

swarm/network/stream/delivery.go

@@ -195,7 +195,6 @@ type ChunkDeliveryMsg struct {
 	Addr  storage.Address
 	SData []byte // the stored chunk Data (incl size)
 	peer  *Peer  // set in handleChunkDeliveryMsg
-	Syncing bool   // if true, this is a delivery for syncing (no SWAP accounting needed)
 }
 
 //...but swap accounting needs to disambiguate if it is a delivery for syncing or for retrieval

swarm/network/stream/peer.go

@@ -131,13 +131,10 @@ func NewPeer(peer *protocols.Peer, streamer *Registry) *Peer {
 // Depending on the `syncing` parameter we send different message types
 func (p *Peer) Deliver(ctx context.Context, chunk storage.Chunk, priority uint8, syncing bool) error {
 	var sp opentracing.Span
-	ctx, sp = spancontext.StartSpan(
-		ctx,
-		"send.chunk.delivery")
-	defer sp.Finish()
-
 	var msg interface{}
 
+	spanName := "send.chunk.delivery"
+
 	//we send different types of messages if delivery is for syncing or retrievals,
 	//even if handling and content of the message are the same,
 	//because swap accounting decides which messages need accounting based on the message type
@@ -145,15 +142,20 @@ func (p *Peer) Deliver(ctx context.Context, chunk storage.Chunk, priority uint8,
 		msg = &ChunkDeliveryMsgSyncing{
 			Addr:  chunk.Address(),
 			SData: chunk.Data(),
-			Syncing: syncing,
 		}
+		spanName += ".syncing"
 	} else {
 		msg = &ChunkDeliveryMsgRetrieval{
 			Addr:  chunk.Address(),
 			SData: chunk.Data(),
-			Syncing: syncing,
 		}
+		spanName += ".retrieval"
 	}
+	ctx, sp = spancontext.StartSpan(
+		ctx,
+		spanName)
+	defer sp.Finish()
+
 	return p.SendPriority(ctx, msg, priority)
 }