Add wantDeliveryError option for signal proto

client/internal/peer/conn.go

@@ -208,8 +208,8 @@ func (conn *Conn) Open(engineCtx context.Context) error {
 
 	// both peer send offer
 	if err := conn.handshaker.SendOffer(); err != nil {
-		conn.guard.FailedToSendOffer()
 		conn.Log.Errorf("failed to send offer: %v", err)
+		conn.guard.FailedToSendOffer()
 	}
 
 	conn.opened = true

client/internal/peer/signaler.go

@@ -67,7 +67,7 @@ func (s *Signaler) signalOfferAnswer(offerAnswer OfferAnswer, remoteKey string,
 		return err
 	}
 
-	if err = s.signal.Send(msg); err != nil {
+	if err = s.signal.SendWithDeliveryCheck(msg); err != nil {
 		return err
 	}