/** * Create md5 hash for IQRF API signature * @param string $param Parameter of request * @param int $time Epoch time * @return string md5 hash */ public function createSignature($param, $time) { return md5($param . '|' . $this->config->getApiKey() . '|' . $this->config->getIpAddr() . '|' . round($time / 600)); }