Ilia Denisov
bdd1cc7d85
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Telegram intersects the chat default with each user's permissions, so a per-user grant can never exceed a deny-by-default group: the original default-deny + grant design could not let any user write (can_send=true was AND-ed with the denying default). Invert it — the chat allows sending by default and the bot MUTES an ineligible member (unregistered, admin-suspended, or chat_muted) and restores an eligible one it had muted, acting only when the current state differs (idempotent, no self-loop). The block/unblock/chat_muted/registration path already sets can_send to the eligibility, so it is unchanged.