ProductsDataProvider::prepareTransactionData

public function prepareTransactionData(): Barcode\Payment\TransactionData
{
	$transactionData = parent::prepareTransactionData();

	$sum = $this->getRawValue('TOTAL_SUM');
	$optionValues = $this->getOptions()['VALUES'] ?? [];
	$templatePlaceholder = DataProviderManager::getInstance()->valueToPlaceholder('TOTAL_SUM');
	if (isset($optionValues[$templatePlaceholder]))
	{
		$sum = $optionValues[$templatePlaceholder];
	}

	if (is_numeric($sum))
	{
		$transactionData->setSum((float)$sum);
	}

	return $transactionData;
}