Add SHUTDOWN_MODE kill switch with farewell announcement#20
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When SHUTDOWN_MODE is truthy, the first middleware intercepts every update and replies with SHUTDOWN_MESSAGE (or the bundled default). No command, scene or callback handler runs while it is on.
Drop the env-var message override, the TRUTHY-spelling set, the callback_query ack and the try/catch/chat guards. The middleware is now a single conditional reply with the bundled farewell.
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Summary
SHUTDOWN_MODEenv flag flips the bot into "answer-only" mode: a single Telegraf middleware intercepts every update before session/scenes/handlers and replies with the shutdown announcement.SHUTDOWN_MESSAGEenv var overrides the bundled default text (src/helpers/shutdownMode.ts:DEFAULT_SHUTDOWN_MESSAGE).callback_queryupdates are acknowledged viaanswerCbQueryso buttons don't spin; reply errors are swallowed and logged so a bad update can't crash the bot.How to use
Set in
.env(or DigitalOcean App Platform env vars) and restart:Flip
SHUTDOWN_MODEoff (or unset) to restore normal operation. Cron checkers (price alerts etc.) are not gated by this flag.Test plan
npm run lintpassesnpm run buildpassesnpx jest— 72/72 green, including 13 new tests covering env parsing, override,callback_query, missingctx.chat, and reply errorsSHUTDOWN_MODE=trueon a staging bot, confirm/start, plain messages and inline-button presses all receive the announcement and no other handler fires