Custom Payment Restrict

CustomPaymentRestrict.php

<?php

use Bitrix\Sale\Services\Base;
use Bitrix\Sale\Internals\Entity;
use Bitrix\Sale\Payment;

class CustomPaymentRestrict extends Base\Restriction
{
    const NAME = 'Только для админов';
    public static function getClassTitle()
    {
        return self::NAME;
    }

    public static function getClassDescription()
    {
        return self::NAME;
    }

    protected static function extractParams(Entity $entity)
    {
        $isAvail = false;
		global $USER;
		
        if ($entity instanceof Payment) {
            /** @var PaymentCollection $collection */
            $collection = $entity->getCollection();
            /** @var Order $order */
            $order = $collection->getOrder();
            /** @var \Bitrix\Sale\Basket $basket */
            $basket = $order->getBasket();
            /** @var \Bitrix\Sale\BasketItem $basketItems */
            $basketItems = $basket->getOrderableItems();
			
			
			if($USER->isAdmin()){
				$isAvail = true;
			}

        }

        return [
            'AVAIL_FOR_ALL' => $isAvail, 
        ];

    }

    public static function getParamsStructure($entityId = 0)
    {
        return [
            'ITEM_COUNT' => [
                'TYPE' => 'NUMBER',
                'DEFAULT' => "0",
                'MIN' => 0,
                'LABEL' => 'Параметр, от которого ничего не зависит',
            ]
        ];
    }

    public static function check($params, array $restrictionParams, $serviceId = 0)
    {
        $result = true;
        if ($params['AVAIL_FOR_ALL'] === false) {
            return false;
        }

        return $result;
    }

}