Add build tags for Firebase

payments/payments.go

@@ -4,12 +4,17 @@ package payments
 
 import "github.com/stripe/stripe-go/v74"
 
+// Available is a constant used to indicate that Stripe support is available.
+// It can be disabled with the 'nopayments' build tag.
 const Available = true
 
+// SubscriptionStatus is an alias for stripe.SubscriptionStatus
 type SubscriptionStatus stripe.SubscriptionStatus
 
+// PriceRecurringInterval is an alias for stripe.PriceRecurringInterval
 type PriceRecurringInterval stripe.PriceRecurringInterval
 
+// Setup sets the Stripe secret key and disables telemetry
 func Setup(stripeSecretKey string) {
 	stripe.EnableTelemetry = false // Whoa!
 	stripe.Key = stripeSecretKey

payments/payments_dummy.go

@@ -2,12 +2,17 @@
 
 package payments
 
+// Available is a constant used to indicate that Stripe support is available.
+// It can be disabled with the 'nopayments' build tag.
 const Available = false
 
+// SubscriptionStatus is a dummy type
 type SubscriptionStatus string
 
+// PriceRecurringInterval is dummy type
 type PriceRecurringInterval string
 
+// Setup is a dummy type
 func Setup(stripeSecretKey string) {
 	// Nothing to see here
 }