Shopify not accepting CarrierService's answer

[jantunes]

Hi!

I have looked into the response that my server replies with - and everything seems ok - the app was also working previously - and I have looked into similar topics here on this forum only to found that most were missing an intermediary response or some kind of other issue.

Now I'm wondering if the issue might be a timeout - as sometimes the reply takes 2 seconds to be given

I also have some doubts on the content of the reply itself - as in the docs it does not state what kind of JSON it is e.g. JSON allows unquoted numbers and booleans (and there's both a number and boolean there)

Regardless here's the initial support ticket I wrote to Shopify support - only to find out after 4/5 emails that they don't give that kind of support anymore via email..  *sigh*
--

Hi!

I have implemented on behalf of a client - https://guillon-fleur.myshopify.com  - a custom CarrierService - which was working and to my knowledge is working correctly.

I have tried adding a lax
min_delivery_date

and max_delivery_date - I have also tried to add the phone_required field - and set the total_price field as a string as per the example found here: https://help.shopify.com/en/api/reference/shipping-and-fulfillment/carrierservice

Yet to no avail

I still get the same error on Shopify's checkout - although I double checked with the server logs and emulating Shopify that the response is correct.

e.g.: for the following POST body:

{"rate":{"origin":{"country":"FR","postal_code":"75006","province":"Ile-De-France","city":"Paris","name":null,"address1":"120 Boulevard Raspail, ","address2":"","address3":null,"phone":"+33145489616","fax":null,"email":null,"address_type":null,"company_name":"Guillon Fleurs"},"destination":{"country":"FR","postal_code":"745005","province":null,"city":"Paris","name":"Test Cancel","address1":"32 Rue Poliveau","address2":"","address3":null,"phone":"","fax":null,"email":null,"address_type":null,"company_name":null},"items":[{"name":"Giverny","sku":"","quantity":1,"grams":100,"price":8000,"vendor":"Guillon Fleurs","requires_shipping":true,"taxable":true,"fulfillment_service":"manual","properties":{"Votre message de accompagnent":""},"product_id":714878713913,"variant_id":17627471609913}],"currency":"EUR","locale":"fr"}}

I'm replying with the following code:

{"rates":[{"service_name":"Vélo","description":"STUART delivery","service_code":"bike","currency":"EUR","total_price":"750.0","min_delivery_date":"2019-12-09 14:48:45 -0400","phone_required":"true","max_delivery_date":"2020-01-09 14:48:45 -0400"}]}

this is critical to the store's proper functioning - for now it has been replaced with a flat rate - but this needs to be fixed ASAP.

These are the details of the CarrierService:

{

    "carrier_service": {

        "id": 11797758009,

        "name": "Stuart Provider",

        "active": true,

        "service_discovery": true,

        "carrier_service_type": "api",

        "admin_graphql_api_id": "gid://shopify/DeliveryCarrierService/11797758009",

        "format": "json",

        "callback_url": "https://guillon-fleurs.appspot.com/shopify-webhook/v1/shipping-rates"

    }

}

i.e. what I get when doing a GET to guillon-fleur.myshopify.com/admin/api/2019-10/carrier_services/11797758009.json

Please advise on how to fix this issue.

Best regards,

João Antunes

[Visely-Team]

So what's the error you are getting on the checkout?

[jantunes]

Thanks for your interest Sergiu (we have interacted before on Slack).
This is the error that the client sees:

[URLify-me]

@jantunesWere you able to fix the error? I am having a simliar issue.

[jantunes]

yes @URLify-me  - it has been a long time - but it was either lacking the CarrierService to be registered - and/or the shipping method configuration to specify the usage of the carrier service

so - basically just double check all of those and the format - and but a debug point - make sure you get the request from shopify - if you give a reply - make sure it's in the right format - etc

[URLify-me]

@jantunes 

What do you mean with "shipping method configuration to specify the usage of the carrier service"?

The following? I am only selling to France. I don't know whether I miss any configurations, as I see my API Carrier Service under "Carrier and app rates"

[URLify-me]

The problem really was caused by a wrong setting under Shopify's Shipping Settings, see the soultion.