Add lotus tracer interface

node/modules/lp2p/tracer.go

@@ -0,0 +1,26 @@
+package lp2p
+
+import (
+	peer "github.com/libp2p/go-libp2p-core/peer"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	pubsub_pb "github.com/libp2p/go-libp2p-pubsub/pb"
+)
+
+func newLotusTracer(tr pubsub.EventTracer) LotusTracer {
+	return &lotusTracer{
+		tr: tr,
+	}
+}
+
+type lotusTracer struct {
+	tr pubsub.EventTracer
+}
+
+type LotusTracer interface {
+	TracePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
+	Trace(evt *pubsub_pb.TraceEvent)
+}
+
+func (lt *lotusTracer) TracePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot) {}
+
+func (lt *lotusTracer) Trace(evt *pubsub_pb.TraceEvent) {}