Magento 2 Klarna checkout

Question

I need to integrate the Klarna Checkout module into magento 2.1.2. I am using the version of the "klarna/m2-checkout module": 4.2.2. When choosing a delivery method, I always get an error in the pop-up window:

Sorry, the delivery option you chose cannot be processed. Please select another delivery option.

When i choose shipping method, i get this responce:

   {
        "shared": {
            "customer": {
                "type": "person"
            },
            "user_preferences": {
                "remember_me": true
            },
            "language": "en",
            "locale": "en-US",
            "customer_details": {
                "client_token": "eyJhbGciOiJSUzUxMiJ9.eyJz",
                "country": "swe",
                "completed": true,
                "fields_with_obfuscation": {
                    "email": "[email protected]",
                    "given_name": "Testperson-se",
                    "family_name": "Approved",
                    "street_address": "Stårgatan 1",
                    "postal_code": "123 45",
                    "city": "Ankeborg",
                    "country": "SE",
                    "phone": "076-526 00 00",
                    "date_of_birth": "1941-03-21",
                    "national_identification_number": "19410321-9202"
                },
                "reference": "2f9a445a57a49215175178099002fc7165ee"
            },
            "shipping_details": {
                "client_token": "eyJhbGciOiJSUzUxMiJ9.eyJzZXNzaW9uX"
            },
            "currency": "SEK",
            "obfuscated_fields": []
        },
        "cart": {
            "total_tax_amount": 30000,
            "total_price_including_tax": 150000,
            "total_price_excluding_tax": 120000,
            "total_shipping_amount_excluding_tax": 0,
            "total_surcharge_amount_excluding_tax": 0,
            "total_discount_amount_excluding_tax": 0,
            "total_shipping_amount_including_tax": 0,
            "total_surcharge_amount_including_tax": 0,
            "total_discount_amount_including_tax": 0,
            "subtotal": 120000,
            "total_store_credit": 0,
            "items": [{
                "type": "physical",
                "reference": "1201018390010",
                "name": "Armour Bib Shorts",
                "quantity": 1,
                "unit_price": 150000,
                "total_tax_amount": 30000,
                "tax_rate": 2500,
                "total_price_including_tax": 150000,
                "total_price_excluding_tax": 120000,
                "product_url": "https://local.com/armour-bib-shorts-black.html?___store%5B_data%5D%5Bstore_id%5D=2&___store%5B_data%5D%5Bcode%5D=se&___store%5B_data%5D%5Bwebsite_id%5D=2&___store%5B_data%5D%5Bgroup_id%5D=2&___store%5B_data%5D%5Bname%5D=Sweden+Store&___store%5B_data%5D%5Bsort_order%5D=30&___store%5B_data%5D%5Bis_active%5D=1&___store%5B_data%5D%5Balias%5D=Sweden&___store%5B_data%5D%5Bavailable_currency_codes%5D%5B0%5D=SEK",
                "image_url": "https://local.com//media/catalog/product/a/r/armour-bib-shorts-aw18-01.jpg"
            }]
        },
        "errors": {
            "generic": ["shipping_service_failed"]
        },
        "options": {
            "allow_separate_shipping_address": false,
            "date_of_birth_mandatory": false,
            "title_mandatory": false,
            "national_identification_number_mandatory": false,
            "phone_mandatory": true,
            "allowed_customer_types": ["person"],
            "payment_selector_on_load": false
        },
        "preview_payment_methods": [{
            "id": "-1",
            "type": "invoice",
            "locked": false,
            "selected": false,
            "data": {
                "days": 14
            }
        }, {
            "id": "-1",
            "type": "direct_debit",
            "locked": false,
            "selected": false
        }, {
            "id": "-1",
            "type": "credit_card",
            "locked": false,
            "selected": false,
            "data": {
                "available_cards": ["VISA", "MASTER"],
                "allow_saved_card": false,
                "do_save_card": false,
                "collect_consent": false,
                "consent_given": false
            }
        }],
        "allowed_billing_countries": ["swe"],
        "status": {
            "prescreened": false
        },
        "analytics_user_id": "ELmpDn1f600JYxHtagC7FcsOdAXe9-2iwWhIzHSfmhM=",
        "merchant": {
            "hashed_id": "a9c814c7a780d46a7fb2403e452829b3",
            "name": "Your business name"
        },
        "merchant_urls": {
            "checkout": "https://local.com/checkout/klarna",
            "confirmation": "https://checkout-eu.playground.klarna.com/yaco/orders/ffc4101d-00cb-5e63-81fc-0f0c15baeac3/redirect?auth_token=0el7mltb89prfz2fz2mw",
            "terms": "https://local.com/terms",
            "confirmation_page": "https://local.com/checkout/klarna/confirmation/id/ffc4101d-00cb-5e63-81fc-0f0c15baeac3"
        }
    }

Here I do not like the block:

 "errors": {
        "generic": ["shipping_service_failed"]
    }

Does anyone know how to fix it?

Delivery error :

Answer 1

This error occurs when you set address_update callback and and it's not handled in the right way. This callback should be set if you need to update order's addresses, and should not take more than 10 sec.

Here's an example: https://developers.klarna.com/api/#checkout-api-callbacks-address-update

And some best practices: https://developers.klarna.com/documentation/klarna-checkout/best-practices/#address-updated

Answer 2

If you run Klarna Checkout on localhost, then you should make the localhost-based application reachable from Klarna via the HTTP protocol (e.g., for the address_update callback).
You can do it via services like Ngrok.