private function pemKeyLenCheck($values)
    {
        if (!is_array($values) || strlen($values[0]) < 62 || strlen($values[1]) < 126) {
            throw new \Exception('Invalid or corrupt secp256k1 key provided. Cannot decode the supplied PEM data. Key lengths too short.  Values checked were "' . var_export($values[0], true) . '" and "' . var_export($values[1], true) . '".');
        }
    }