How can I catch DownstreamResponse? about laravel-fcm-notification-channel

[enniel]

It's must working.

// YourServiceProvider.php
use NotificationChannels\FCM\MessageWasSended;
...
Event::listen(MessageWasSended::class, function (MessageWasSended $event) {
  $downstreamResponse = $event->response;

  $downstreamResponse->numberSuccess();
  $downstreamResponse->numberFailure();
  $downstreamResponse->numberModification();

  //return Array - you must remove all this tokens in your database
  $downstreamResponse->tokensToDelete(); 

  //return Array (key : oldToken, value : new token - you must change the token in your database )
  $downstreamResponse->tokensToModify(); 

  //return Array - you should try to resend the message to the tokens in the array
  $downstreamResponse->tokensToRetry();
});
...

[Brianop]

I finally got it working, thanks for the support!!!