CRestProvider::appInfo

static function appInfo($params, $n, CRestServer $server)
{
	$licensePrevious = '';
	if(BitrixMainModuleManager::isModuleInstalled('bitrix24'))
	{
		$result = self::getBitrix24LicenseName();
		$license = $result['LICENSE'];

		if ($result['TYPE'] == 'demo')
		{
			$result = self::getBitrix24LicenseName(CBitrix24::LICENSE_TYPE_PREVIOUS);
			$licensePrevious = $result['LICENSE'];
		}
	}
	else
	{
		$license = LANGUAGE_ID.'_selfhosted';
	}

	if($server->getClientId())
	{
		$arApp = self::getApp($server);

		$info = BitrixRestAppTable::getAppStatusInfo($arApp, '');

		$res = array(
			'ID' => $arApp['ID'],
			'CODE' => $arApp['CODE'],
			'VERSION' => intval($arApp['VERSION']),
			'STATUS' => $info['STATUS'],
			'INSTALLED' => $arApp['INSTALLED'] == BitrixRestAppTable::INSTALLED,
			'PAYMENT_EXPIRED' => $info['PAYMENT_EXPIRED'],
			'DAYS' => $info['DAYS_LEFT'],
			'LANGUAGE_ID' => CRestUtil::getLanguage(),
			'LICENSE' => $license,
		);
		if ($licensePrevious)
		{
			$res['LICENSE_PREVIOUS'] = $licensePrevious;
		}
		if (CModule::IncludeModule('bitrix24'))
		{
			$res['LICENSE_TYPE'] = CBitrix24::getLicenseType();
			$res['LICENSE_FAMILY'] = CBitrix24::getLicenseFamily();
		}

		$server->setSecurityState($res);
	}
	elseif($server->getPasswordId())
	{
		$res = array(
			'SCOPE' => static::getScope($server),
			'LICENSE' => $license,
		);
	}
	else
	{
		throw new AccessException("Application context required");
	}

	foreach(GetModuleEvents('rest', 'OnRestAppInfo', true) as $event)
	{
		$eventData = ExecuteModuleEventEx($event, array($server, &$res));
		if(is_array($eventData))
		{
			if(!isset($res['ADDITIONAL']))
			{
				$res['ADDITIONAL'] = array();
			}

			$res['ADDITIONAL'] = array_merge($res['ADDITIONAL'], $eventData);
		}
	}

	return $res;
}