In the graphql api i can create discounts for normal purchases & subscriptions using this mutation: https://shopify.dev/docs/api/admin-graphql/2024-07/mutations/discountCodeBasicCreate
however, if a store does not have subscription purchases enabled then the applies_on_subscription field of the above mutation causes an error when you fire the mutation (even if the field is set to false). The error is: “applies_on_subscription field is not permitted without the shop using subscriptions”
To fix this I’ve used this query: https://shopify.dev/docs/api/admin-graphql/2023-10/queries/shop to determine when a store is eligibleForSubscriptions (under features.eligibleForSubscriptions). HOWEVER, even that query doesn’t work in all cases. I’ve found stores where eligibleForSubscriptions is true but I still get the “not permitted without the shop using subscriptions” error.
So, what can a developer query to determining when a shop is using subscriptions?