Magento 2 Klarna Error: 'Order line totals do not total order_amount - 17311 != 17310'

Question

When I add a configurable product to the map and go to the second checkout step and after loading it again I reload it, I get this error: 'Order line totals do not total order_amount - 17311 != 17310'

This error is from the method validate that is in the file: vendor/klarna/module-kp/Model/Api/Request/Builder.php

Code:

    public function validate($requiredAttributes, $type)
{
    $missingAttributes = [];
    foreach ($requiredAttributes as $requiredAttribute) {
        if (null === $this->$requiredAttribute) {
            $missingAttributes[] = $requiredAttribute;
        }
        if (is_array($this->$requiredAttribute) && count($this->$requiredAttribute) === 0) {
            $missingAttributes[] = $requiredAttribute;
        }
    }
    if (!empty($missingAttributes)) {
        throw new KlarnaApiException(
            __(
                'Missing required attribute(s) on %1: "%2".',
                $type,
                implode(', ', $missingAttributes)
            )
        );
    }
    $total = 0;
    foreach ($this->orderlines as $orderLine) {
        $total += (int)$orderLine->getTotal();
    }

    if ($total !== $this->order_amount) {
        throw new KlarnaApiException(
            __('Order line totals do not total order_amount - %1 != %2', $total, $this->order_amount)
        );
    }

    return $this;
}

I get into the method validate from here vendor/klarna/module-kp/Model/Api/Builder/Kasper.php

Code:

    private function generateCreateUpdate()
{
    $requiredAttributes = [
        'purchase_country',
        'purchase_currency',
        'locale',
        'order_amount',
        'orderlines'
    ];

    /** @var \Magento\Quote\Model\Quote $quote */
    $quote = $this->getObject();
    $store = $quote->getStore();
    $options = array_map('trim', array_filter($this->configHelper->getCheckoutDesignConfig($store)));

    /**
     * Pre-fill customer details
     */
    $this->prefillAddresses($quote, $store);

    $address = $quote->isVirtual() ? $quote->getBillingAddress() : $quote->getShippingAddress();

    $tax = $address->getBaseTaxAmount();
    if ($this->configHelper->isFptEnabled($store) && !$this->configHelper->getDisplayInSubtotalFpt($store)) {
        $fptResult = $this->rate->getFptTax($quote);
        $tax += $fptResult['tax'];
    }

    $country = $address->getCountryId();
    if ($country === null) {
        $country = $this->directoryHelper->getDefaultCountry($store);
    }
    $this->requestBuilder->setPurchaseCountry($country)
        ->setPurchaseCurrency($quote->getBaseCurrencyCode())
        ->setLocale(str_replace('_', '-', $this->configHelper->getLocaleCode()))
        ->setOptions($options)
        ->setOrderAmount((int)$this->dataConverter->toApiFloat($address->getBaseGrandTotal()))
        ->addOrderlines($this->getOrderLines($quote->getStore()))
        ->setOrderTaxAmount((int)$this->dataConverter->toApiFloat($tax))
        ->setMerchantUrls($this->processMerchantUrls())
        ->validate($requiredAttributes, self::GENERATE_TYPE_CREATE);

    return $this;
}

My problem is that ($total !== $this->order_amount) = true I always have a difference of 1.

But I can't figure out why this is happening and how to fix it. Tell me, please, what could be the problem and how to fix it? If suddenly someone faced this behavior, how did you fix it?

Answer 1

I found a solution to this problem.

In my case, this was due to the fact that I have a very strong modification of the current types of products: configurable and bundle, in particular.

Because of these modifications, I was getting this behavior because the pricing was changed and the price was affected by the logic that applies to my modified products.

If you do not have modified products, there are no custom product types, then my case will not suit you, but it can lead to the right solution in search of a problem.

And so, I found the problem in the class: Klarna\Core\Model\Checkout\Orderline\Items, methods: collect and processItem, shouldSkip.

1. In the method collect i had a problem that shouldSkip missed the products needed for pricing, therefore, I had to modify this method for the changed logic.
2. In the method processItem I had to change the logic that relates to getting data like: total_amount, unit_price
3. You need to check that in the processItem everything was correct so that the products that need to be skipped for pricing are skipped.

After these changes, checking in the file no longer gave an error: vendor/klarna/module-kp/Model/Api/Request/Builder.php

I want to reiterate, my case is an exception, I don't claim that this is the right way to fix the problem, but it worked for me.

Answer 2

Klarna\Core\Model\Checkout\Orderline\Items;

private function processItem($product, $item, $qtyMultiplier)

Modify the processItem function

private function processItem($product, $item, $qtyMultiplier)
    {
 .....

    if ($this->klarnaConfig->isSeparateTaxLine($item->getStore())) {
      ......
    } else {
       .......
          $_item['total_amount'] = $this->helper->toApiFloat(
           ($item->getBaseRowTotal() - $item->getBaseDiscountAmount()) + $item->getBaseTaxAmount()
        );
        }
}

Answer 3

./bin/magento setup:config:set --deferred-total-calculating 0