QR code file problem

Hey,

I also recognize this. For that reason i changed the code, to that the file will contains the order-id, so it’s unique for every session, user. This solves the problem. Below my changes :

NMM_Gateway.php
0) Create tmp dir in PluginDir/assests/tmp
1) change qr function

private function get_qr_code($order_id, $crypto, $walletAddress, $cryptoTotal) {        
        //$dirWrite = NMM_ABS_PATH . '/assets/img/';
        $dirWrite = NMM_ABS_PATH . '/assets/tmp/';
        $formattedName = $this->get_qr_prefix($crypto);
        //$qrData = $formattedName . ':' . $walletAddress . '?amount=' . $cryptoTotal;
        $qrData = $walletAddress;

        try {
            QRcode::png($qrData, $dirWrite . 'tmp_qrcode-' . $order_id . '.png', QR_ECLEVEL_H);            
            //QRcode::png($qrData, $dirWrite . 'tmp_qrcode.png', QR_ECLEVEL_H);            
        }
        catch (\Exception $e) {
            NMM_Util::log(__FILE__, __LINE__, 'QR code generation failed, falling back...');
            $endpoint = 'https://api.qrserver.com/v1/create-qr-code/?data=';
            return $endpoint . $qrData;
        }
        $dirRead = NMM_PLUGIN_DIR . '/assets/tmp/';
        return $dirRead . 'tmp_qrcode-'. $order_id . '.png';
        //return $dirRead . 'tmp_qrcode.png';
    }

2) change in “additional_email_details” function :
//$qrCode = $this->get_qr_code($crypto, $orderWalletAddress, $orderCryptoTotal);
$qrCode = $this->get_qr_code($order->get_id(), $crypto, $orderWalletAddress, $orderCryptoTotal);

3) change in “output_thank_you_html” function
$qrCode = $this->get_qr_code($orderId,$crypto, $orderWalletAddress, $cryptoTotal);

And this solves this problem.

Thank you for this great plugin! Very usefully and good maintenable.