lanzu_api_2021-12-26/app/Service/v3/Implementations/CouponService.php

<?php

namespace App\Service\v3\Implementations;

use App\Service\v3\Interfaces\CouponServiceInterface;

class CouponService implements CouponServiceInterface
{

    /**
     * @inheritDoc
     */
    public function do()
    {
        // TODO: Implement do() method.
    }

    /**
     * @inheritDoc
     */
    public function check()
    {
        // TODO: Implement check() method.
    }

    /**
     * @inheritDoc
     */
    public function undo()
    {
        // TODO: Implement undo() method.
    }

    /**
     * @inheritDoc
     */
    public function countAvailableByUser($userId)
    {
        return mt_rand(0,10);
    }
}