exchange-2.0/app/Classes/Notifications/PaymentProofUploadedEmail.php

<?php

namespace App\Classes\Notifications;

use App\Models\Booking;
use App\Models\User;
use App\Models\UserEmailVerification;
use Illuminate\Notifications\Messages\MailMessage;

class PaymentProofUploadedEmail extends AbstractEmail
{

    /** @var User */
    private $user;

    /** @var Booking */
    private $booking;

    /**
     * UserVerificationEmail constructor.
     * @param User $user
     * @param UserEmailVerification $attempt
     */
    public function __construct(User $user, Booking $booking)
    {
        $this->user = $user;
        $this->booking = $booking;
    }


    public function toMail()
    {
        return (new MailMessage)
            ->subject('Transfer Completed (REF: ' . $this->booking->marking . ')')
            ->to('edmond.wuiming2021@gmail.com') // testing email
            // ->attach('/path/to/file') // todo-new: add attachement
            ->view('emails.accounts.payment_proof_email', ['user' => $this->user, 'booking' => $this->booking]);
    }


}