SimpleSoftwareIO\QrCode\DataTypes\BTC::buildBitCoinString PHP Метод

    protected function buildBitCoinString()
    {
        $query = http_build_query(['amount' => $this->amount, 'label' => $this->label, '$message' => $this->message, 'r' => $this->returnAddress]);
        $btc = $this->prefix . $this->address . '?' . $query;
        return $btc;
    }