public function dms_make_transaction($trans_id)
    {
        $post_fields = array(
            'command'        => 't', // identifies a request for transaction registration
            'trans_id'       => $trans_id,
            'amount'         => $this->amount,
            'currency'       => $this->currency,
            'client_ip_addr' => $this->client_ip_addr,
            'description'    => $this->description,
            'language'       => $this->language,
            'msg_type'       => 'DMS'
        );

        return $this->process($post_fields);
    }