Carrier service - how to send all products (regardless of shipping profile) in one request.

[dgamnmma3]

Hey guys, I have implemented the a custom carrier service using the API https://shopify.dev/docs/admin-api/rest/reference/shipping-and-fulfillment/carrierservice

An example of my problem - When I add two products from different shipping profiles using the same carrier service, the delivery is added but I dont want this.  e.g. The first product delivery fee is 600. the second product is 400. I would like to delivery fee to be 600 (i.e. the maximum of the two), not the total (600+400).

The example explained

The shopping cart 

the first item is in the general shipping profile, 

the second product is in a custom shipping profile

They are both using the same carrier service: Shipping Rate Provider23423 (bad  name I know).

My backend is receiving two requests, calculating the delivery fee for each, and then shopify is adding them together. How do I get shopify to send  just one request with both products.

In detail.

the first request.

{
   "rate":{
      "origin":{
         "country":"AU",
         "postal_code":"xxx",
         "province":"xxx",
         "city":"xxx",
         "name":null,
         "address1":"xxx",
         "address2":null,
         "address3":null,
         "phone":"",
         "fax":null,
         "email":null,
         "address_type":null,
         "company_name":"smartkits dev"
      },
      "destination":{
         "country":"xxx",
         "postal_code":"xxx",
         "province":"xxx",
         "city":"xxx",
         "name":"xxx",
         "address1":"xxx",
         "address2":"",
         "address3":null,
         "phone":null,
         "fax":null,
         "email":null,
         "address_type":null,
         "company_name":null
      },
      "items":[
         {
            "name":"Insulated Flyover Roof- 10m x 8m",
            "sku":"",
            "quantity":1,
            "grams":0,
            "price":1555000,
            "vendor":"xxx",
            "requires_shipping":true,
            "taxable":false,
            "fulfillment_service":"manual",
            "properties":{
               
            },
            "product_id":6584689164494,
            "variant_id":39432892121294
         }
      ],
      "currency":"AUD",
      "locale":"en"
   }
}

the second request

{
   "rate":{
      "origin":{
         "country":"xxx",
         "postal_code":"xxx",
         "province":"xxx",
         "city":"xxx",
         "name":null,
         "address1":"xxx",
         "address2":null,
         "address3":null,
         "phone":"",
         "fax":null,
         "email":null,
         "address_type":null,
         "company_name":"xxx"
      },
      "destination":{
         "country":"xxx",
         "postal_code":"xxx",
         "province":"xxx",
         "city":"xxx",
         "name":"xxx",
         "address1":"xxx",
         "address2":"",
         "address3":null,
         "phone":null,
         "fax":null,
         "email":null,
         "address_type":null,
         "company_name":null
      },
      "items":[
         {
            "name":"Attached Skillion Patio Roof- 10m x 4m - Modern Corrugated profile.",
            "sku":"",
            "quantity":1,
            "grams":0,
            "price":509500,
            "vendor":"xxx",
            "requires_shipping":true,
            "taxable":false,
            "fulfillment_service":"manual",
            "properties":{
               
            },
            "product_id":6584674353358,
            "variant_id":39432776089806
         }
      ],
      "currency":"AUD",
      "locale":"en"
   }
}

I want one request where the items array is:

...
...
...{
   "items":[
      {
         "name":"Insulated Flyover Roof- 10m x 8m",
         "sku":"",
         "quantity":1,
         "grams":0,
         "price":1555000,
         "vendor":"SmartKits Australia",
         "requires_shipping":true,
         "taxable":false,
         "fulfillment_service":"manual",
         "properties":{
            
         },
         "product_id":6584689164494,
         "variant_id":39432892121294
      },
      {
         "name":"Attached Skillion Patio Roof- 10m x 4m - Modern Corrugated profile.",
         "sku":"",
         "quantity":1,
         "grams":0,
         "price":509500,
         "vendor":"SmartKits Australia",
         "requires_shipping":true,
         "taxable":false,
         "fulfillment_service":"manual",
         "properties":{
            
         },
         "product_id":6584674353358,
         "variant_id":39432776089806
      }
   ]
}
...

Many thanks 

[dgamnmma3]

Anyone?

[Parcel_Intellig]

this isn't possible due to multi-origin shipping being enabled.