invoiceninja/app/Events/PaymentFailed.php

<?php namespace App\Events;

use App\Events\Event;

use Illuminate\Queue\SerializesModels;

class PaymentFailed extends Event {

    use SerializesModels;

    public $payment;

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

}