We have to add in-app purchases for the iOS, macOS and Android store, so
that users can also get the premium features of the app without using
Stripe for payments.
The in-app purchases are only enabled when a user uses the app with the
default Supabase environment or with the Supabase environment provided
during build time. If a user uses his own Supabase instance, he will not
be able to upgrade to the premium tier via in-app purchases.
We are using RevenueCat for in-app purchases, which automatically sends
all the events for a user to the "revenuecat-webhooks-v1" edge function.
Depending on the received event we can then upgrade / downgrade the
users profile. To be able to use RevenueCat as an additional provider to
Stripe we also had to add a new "subscriptionProvider" provider column
to the "profiles" table, which stores the information via which provider
a user upgraded his account.
It is now possible to use a Nitter instance, where the RSS endpoints are
protected via basic authentication. For that a new
"FEEDDECK_SOURCE_NITTER_BASIC_AUTH" environment variable was added,
which can be used to set the value for the authentication header.
