To update the shipping fee while the Checkout is rendered on the screen, a call to the Checkout Client API's suspend() function shall be performed before calling the Checkout Backend API.
Suspend and resume flow
// Suspend the Checkout, showing a spinner...
// ... then call the backend API to set the new Cart
// ... and finally resume the Checkout after the backend call is completed to update the Checkout
The shipping fee is updated by sending a fee object to the Checkout API from your backend. The fee is optional but will be shown last on the receipt after all the cart items if present and be presented separately on the thank you-page.
Once the backend request has completed, a call to the Checkout Client API's
resume() function shall be made to update the state of the Checkout session.
Update fees request
PUT /merchants/123/checkouts/1eec44b5-66d3-4058-a31f-3444229fb727/fees HTTP/1.1
Authorization: SharedKey bXlVc2VybmFtZTpmN2E1ODA4MGQzZTk0M2VmNWYyMTZlMDE...
"description": "Shipping fee (incl. VAT)",
Example error. More errors available below.
"message": "The resource requested is currently locked for modification. Try again.",
"message": "The resource requested is currently locked for modification. Try again."
Please note that this operation cannot be performed if the Checkout session has expired.
If using PaymentService v9 or older: The combination of id and description of a fee must be unique within the cart and fees objects.
|Authorization||Yes||The authorization header is generated with the access credentials (username and shared access key) received from Walley Merchant Services. Instructions on how to generate the authorization header value can be found under the authorization section.|
To set the shipping fee, add a
shipping object to the fees object of the request. The shipping object can be
null to remove the shipping fee for the current Checkout.
shipping object contain the following properties:
|id||Yes||An id of the fee item. Max 50 characters. The combination of id and description (property below) must be unique within the Checkout session including the articles in the cart. Values are trimmed from leading and trailing white-spaces. Shown on the invoice or receipt.|
|description||Yes||Descriptions longer than 50 characters will be truncated. Description and id (property above) must be unique within the Checkout session including the articles in the cart. Values are trimmed from leading and trailing white-spaces. Shown on the invoice or receipt.|
|unitPrice||Yes||The unit price of the fee including VAT. Allowed values are |
|vat||Yes||The VAT of the fee in percent. Allowed values are |
Important error responses
|Error code||Error Reason||Cause|
|400||Duplicate_Articles||Can't add article/fees since multiple articles/fees with same id and description already exist.|
|400||Validation_Error||The request contains properties with invalid values. Details are provided in the response body.|
|423||Resource_Locked||Another modifying request is currently being executed for the Checkout session. Retry by sending the request again.|
|900||Purchase_Commitment_Found||The customer has clicked the Complete Purchase button and the Checkout is therefore locked for modifications.|
|900||Purchase_Completed||Purchase is already complete.|