update middleware

middleware/log.go

@@ -14,7 +14,7 @@ func Logger(next jrpc.Handler) jrpc.Handler {
 	fn := func(w jrpc.ResponseWriter, r *jrpc.Request) {
 		start := time.Now()
 		next.ServeRPC(w, r)
-		log.Trace().Dur("dur", time.Now().Sub(start)).Str("method", r.Method()).Str("params", string(r.Msg().Params)).Msg("RPC Request")
+		log.Trace().Interface("ms", time.Since(start)).Str("method", r.Method()).Str("params", string(r.Msg().Params)).Msg("RPC Request")
 	}
 	return jrpc.HandlerFunc(fn)
 }