DragonBe\Vies\Validator\ValidatorES::validateJuridical PHP Метод

    private function validateJuridical($vatNumber)
    {
        $checkval = 0;
        for ($i = 2; $i <= 8; $i++) {
            $checkval += $this->crossSum((int) $vatNumber[9 - $i] * ($this->isEven($i) ? 2 : 1));
        }
        $checkval = 10 - $checkval % 10;
        return $this->checkCharacter[$checkval];
    }