namespace Softweb\ModifyCheckoutFields\Helper;
 use Magento\Framework\App\Helper\Context;
 use Magento\Framework\App\CacheInterface;
 use Magento\Framework\HTTP\Client\Curl;
 use Magento\Store\Model\StoreManagerInterface;
	 class LicenseValidator extends \Magento\Framework\App\Helper\AbstractHelper {
	 protected $storeManager;
	 protected $curl;
	 protected $cache;
		 public function __construct(Context $context, StoreManagerInterface $storeManager, Curl $curl, CacheInterface $cache) {
		 parent::__construct($context);
		 $this->storeManager = $storeManager;
		 $this->curl = $curl;
		 $this->cache = $cache;
		 
	}
		 public function isValid() {
		 $module = "Softweb_ModifyCheckoutFields";
		 $domain = parse_url($this->storeManager->getStore()->getBaseUrl(), PHP_URL_HOST);
		 $cacheKey = "sw_license_" . md5($module . $domain);
		 $cached = $this->cache->load($cacheKey);
			 if ($cached !== false) {
			 return $cached === "1";
			 
		}
			 $url = "https://your-license-server.com/api/check?module={
			$module
		}
			&domain={
			$domain
		}
		";
			 try {
			 $this->curl->get($url);
			 $response = json_decode($this->curl->getBody(), true);
			 $valid = isset($response["valid"]) && $response["valid"] === true;
			 $this->cache->save($valid ? "1" : "0", $cacheKey, array(), 86400);
			 return $valid;
			 
		}
			 catch (\Exception $e) {
			 return false;
			 
		}
		 
	}
	 
}