New BotSubscriptionsBot demonstrating the 36.0.0 subscription-updates API:
- onBotSubscriptionUpdated trigger reading user / invoicePayload / state
- exhaustive handling of the typed BotSubscriptionUpdated.State sealed type
(Active / Canceled / Failed data objects + Unknown value-class fallback)
- botSubscriptionUpdatedUpdatesFlow raw update flow
- waitBotSubscriptionUpdated expectation
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
