Klarna
Checkout can be used to accept Klarna payments.
Integration options supported: Hosted payment page (HPP) or IFRAME.
This guide requires familiarity with Accepting payments.
Integrate Klarna via Checkout
currency_code
String (required)
Supported currencies: EUR, DKK, NOK, SEK, USD
amount
Integer (required)
Transaction amount
configurations.klarna
Object (required)
Object carrying the parameters required for making a Klarna payment
customer
String (required)
ID of a Customer created via the Customer API. A customer object can be created and attached to a Checkout. Supported Countries ('US', 'NO', 'SE', 'FI', 'DK')
capture_now
Boolean (optional)
Used for separate authorization and capture
line_items
Array of objects (required)
Each line item represents a product in the checkout
Authorization and capture
Klarna transactions through the Checkout can be used to do a sale (capture_now = true) or to authorize without capturing immediately (capture_now = false). An authorized payment reserves the money and allows you to capture the funds at a later stage.
Handling responses
Whenever a card payment is processed via the Checkout, the responses events would contain additional fields specific to card payments in the details object.
Sending a checkout request using Klarna payment method:
Example of successful checkout via the Checkout:
Example of failed Klarna payment via the Checkout:
To ensure that the redirection request was not tampered with, always check that the transaction_id received as query parameter in the redirection matches the transaction_id property of the retrieved Checkout. If those are not matching, this is indication of either an incorrect integration, that the redirection to your return_url did not originate from Verifone, or transaction_id was tampered with.
You can now store the transaction_id value together with the order 1234 in your system to link the two together.
Scenarios
The table below describes the different outcomes of a Checkout. A full list of error codes are available.
Failed transaction*
Redirect: checkout_id={checkout_id} & transaction_id={transaction_id} & errorCode=123
Unsuccessful payment (technical reason), do not display order confirmation
Successful transaction
Redirect: checkout_id={checkout_id} & transaction_id={transaction_id}
Display order confirmation
Customer visits the URL of an already completed Checkout
Redirect: checkout_id={checkout_id} & errorCode=168
Display corresponding message to the customer. Checkout is completed whenever there was a single successful payment processed through it.
Customer visits the URL of an expired Checkout
Redirect: checkout_id={checkout_id} & errorCode=169
Display corresponding message to the customer. Checkout is expired whenever the expiry_time is reached
Customer visits the URL of a Checkout which has reached the maximum of failed payment attempts
Redirect: checkout_id={checkout_id} & errorCode=165
Display corresponding message to the customer. Payments through a single Checkout can be attempted up to three times unsuccessfully.
Form validation errors / Other service failures on the Checkout page
Displays error alert to Customer on the page
Customer is prompted to correct their form input and retry the payment or try using alternate card or the payment method
* Failed transaction - Depending on which step in the payment process failed, the transaction_id might not always be present as the query parameter.
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