OpenLineChat::read

public function read(bool $onlyRecent = false, bool $byEvent = false, bool $forceRead = false): Result
{
	Recent::unread($this->getDialogId(), false, $this->getContext()->getUserId());

	if ($onlyRecent)
	{
		$lastId = $this->getReadService()->getLastMessageIdInChat($this->chatId);

		return (new Result())->setResult([
			'CHAT_ID' => $this->chatId,
			'LAST_ID' => $lastId,
			'COUNTER' => $this->getReadService()->getCounterService()->getByChat($this->chatId),
			'VIEWED_MESSAGES' => [],
		]);
	}

	return $this->readAllMessages($byEvent, $forceRead);
}