Airship\Cabin\Bridge\Landing\Notary::verify PHP Method

    public function verify()
    {
        // Input validation
        if (empty($_POST['challenge'])) {
            \Airship\json_response(['status' => 'error', 'message' => 'Expected a challenge=something HTTP POST parameter.']);
        }
        if (!\is_string($_POST['challenge'])) {
            \Airship\json_response(['status' => 'error', 'message' => 'Challenge must be a string.']);
        }
        if (Binary::safeStrlen($_POST['challenge']) < 20) {
            \Airship\json_response(['status' => 'error', 'message' => 'Challenge is too short. Continuum should be generating a long random nonce.']);
        }
        try {
            list($update, $signature) = $this->chanUp->verifyUpdate($this->sk, $_POST['challenge']);
            \Airship\json_response(['status' => 'OK', 'response' => $update, 'signature' => $signature]);
        } catch (\Exception $ex) {
            \Airship\json_response(['status' => 'error', 'message' => $ex->getMessage()]);
        }
    }