refactor

cmd/cmd_renew.go

@@ -141,12 +141,11 @@ func renewForDomains(ctx *cli.Context, client *lego.Client, certsStorage *Certif
 		// https://github.com/go-acme/lego/issues/1656
 		// https://github.com/certbot/certbot/blob/284023a1b7672be2bd4018dd7623b3b92197d4b0/certbot/certbot/_internal/renewal.py#L472
 		const jitter = 8 * time.Minute
-		rndSource := rand.NewSource(time.Now().UnixNano())
-		rnd := rand.New(rndSource)
+		rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
 		sleepTime := time.Duration(rnd.Int63n(int64(jitter)))
-		
+
 		log.Infof("renewal: random delay of %s", sleepTime)
-		time.Sleep(time.Duration(sleepTime))
+		time.Sleep(sleepTime)
 	}
 
 	request := certificate.ObtainRequest{