baoshi-was/app/Events/DeliveryAppointmentEvent.php

<?php

namespace App\Events;

use App\DeliveryAppointmentCar;
use Illuminate\Broadcasting\Channel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class DeliveryAppointmentEvent implements ShouldBroadcast
{
    use Dispatchable, SerializesModels;

    public $delivery;
    /**
     * Create a new event instance.
     *
     * @param DeliveryAppointmentCar $delivery
     *
     * @return void
     */
    public function __construct(DeliveryAppointmentCar $delivery)
    {
        $this->delivery = $delivery;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('delivery');
    }

    public function broadcastAs()
    {
        return "car";
    }
}