Create NotificationFailed event (#14874)

src/Illuminate/Notifications/Events/NotificationFailed.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Illuminate\Notifications\Events;
+
+class NotificationFailed
+{
+    /**
+     * The notifiable entity who received the notification.
+     *
+     * @var mixed
+     */
+    public $notifiable;
+
+    /**
+     * The notification instance.
+     *
+     * @var \Illuminate\Notifications\Notification
+     */
+    public $notification;
+
+    /**
+     * The channel name.
+     *
+     * @var string
+     */
+    public $channel;
+
+    /**
+     * The data needed to process this failure.
+     *
+     * @var array
+     */
+    public $data = [];
+
+    /**
+     * Create a new event instance.
+     *
+     * @param  mixed  $notifiable
+     * @param  \Illuminate\Notifications\Notification  $notification
+     * @param  string  $channel
+     * @param  array  $data
+     * @return void
+     */
+    public function __construct($notifiable, $notification, $channel, $data = [])
+    {
+        $this->channel = $channel;
+        $this->notifiable = $notifiable;
+        $this->notification = $notification;
+        $this->data = $data;
+    }
+}