CrmEntityDataProvider::getPaymentQrCode

public function getPaymentQrCode(): ?string
{
	if (!is_null($this->paymentQrCodePath))
	{
		return $this->paymentQrCodePath;
	}
	if (!$this->isLoaded())
	{
		return null;
	}

	$transactionData = $this->prepareTransactionData();

	$paymentQr = new Barcode\Payment($transactionData);

	if (!$paymentQr->validate()->isSuccess())
	{
		return null;
	}

	$this->paymentQrCodePath = $paymentQr->saveToTemporaryFile();

	return $this->paymentQrCodePath;
}