File: /var/www/vhost/disk-apps/agile-selling-mia/app/Events/ChangeStateEvent.php
<?php
namespace App\Events;
use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
class ChangeStateEvent implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;
    /**
     * Create a new event instance.
     *
     * @return void
     */
    public $orderId;
    public function __construct($orderId)
    {
        $this->orderId = $orderId;
    }
    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new PrivateChannel('orders-channel');
    }
    public function broadcastAs(){
        return 'change-state-'.$this->orderId;
    }
}