misc_pterodactyl-panel/app/Http/Requests/Api/Application/Mounts/MountEggsRequest.php

<?php

namespace Pterodactyl\Http\Requests\Api\Application\Mounts;

use Pterodactyl\Http\Requests\Api\Application\ApplicationApiRequest;

class MountEggsRequest extends ApplicationApiRequest
{
    public function rules(array $rules = null): array
    {
        return $rules ?? ['eggs' => 'required|exists:eggs,id'];
    }
}