DirectAdmin\LetsEncrypt\Lib\Challenges::solvableChallenges PHP Метод

    public function solvableChallenges()
    {
        if (empty($this->challenges)) {
            $this->receiveChallenges();
        }
        $domains = array_merge((array) $this->domain->getDomain(), $this->subdomains);
        foreach ($domains as $domain) {
            $this->solvableChallenges[$domain] = [];
            foreach ($this->challenges[$domain] as $i => $challenge) {
                if ($challenge->solvable()) {
                    $this->solvableChallenges[$domain][] = $i;
                }
            }
            foreach ($this->solvableChallenges[$domain] as $i => $challenge) {
                if (!in_array([$challenge], $this->combinations[$domain])) {
                    unset($this->solvableChallenges[$domain][$i]);
                }
            }
            if (empty($this->solvableChallenges[$domain])) {
                throw new \Exception('We didn\'t receive any challenge we can solve for ' . $domain);
            }
        }
        return $this->solvableChallenges;
    }