{"ok":true,"data":{"round":{"ref":"cairn/2","round":2,"title":"Wallet alerts, every token","status":"closed","revealMode":"platform","spec":"Cairn watches wallets for a chat across every token on Starknet, not only the registry, and delivers every\r\nalert exactly once. Round 1's commands, formats and checks stay as they are.\r\n\r\n**Commands.** `/watch <address> [label]` (a label of at most 32 characters, escaped), `/unwatch <address|label>`,\r\nand `/list` with a Remove button per subscription. `/whale <SYMBOL|token address> <amount>` posts every\r\ntransfer of that token at or above the amount, labelling mints and burns; `/unwhale <SYMBOL|token address>`\r\nstops it. `/min <SYMBOL|token address> <amount>` sets the chat's floor for watch alerts on that token.\r\n`/mute <token address>` silences one token in the chat (for spam airdrops) and `/unmute <token address>`\r\nundoes it. `/balance <address> [SYMBOL|token address]` gains an optional token, which may be any ERC-20; for an\r\naddress watched in the chat, `/balance` also lists the non-zero balances of the tokens seen moving for it\r\nsince the watch began. `/track <hash>` posts once on L2 acceptance\r\n(execution status and fee), then once on L1 acceptance or on a revert with its reason, and says \"not found\"\r\nafter 600 s of chain time. `/export` replies with everything stored for the chat as JSON\r\n(`{\"chat_id\",\"watches\",\"whales\",\"minimums\",\"tracks\",\"muted\"}`), and `/forget` deletes it all. In a private chat, a\r\npasted address gets the `/balance` reply with a Watch button, and a pasted hash the `/tx` reply with a Track\r\nbutton. In groups, everything but `/list` needs an administrator, anonymous ones included; a refusal says\r\nwhy. Caps: `CAIRN_MAX_WATCHES` (default 20) watches per chat, 5 whale thresholds, 10 tracks; a user's\r\ncommands beyond 10 in 60 s of `message.date` get one slow-down notice, then are ignored until the window\r\npasses.\r\n\r\n**Scanning.** Each pass scans the blocks after the cursor, at most `CAIRN_MAX_BLOCKS` (default 500), with one\r\nchain-wide `starknet_getEvents` filter: keys `[[Transfer, Approval]]`, no address, `chunk_size` 1000 (some\r\nproviders refuse more than 1024), following every `continuation_token`. Mainnet emits about 17 such events\r\nper block, so a pass at the default poll reads one page, and a 500-block catch-up about nine. Each event is\r\ndecoded by its shape: keys `[sel, a, b]` with data `[low, high]` is a modern ERC-20 event; keys `[sel]` with\r\ndata `[a, b, low, high]` is a legacy ERC-20 event when its contract answers `decimals`, and otherwise a legacy\r\nNFT, which is ignored; any other shape (such as an NFT with its token id in the keys) is ignored. A\r\nsubscription covers only the blocks after the head read in the pass that handled its command; the first\r\nstart never backfills. Never alerted: zero-amount transfers (address poisoning), fee payments (the STRK\r\n`Transfer` from the sender to the block's `sequencer_address`, the last event of its transaction), transfers\r\nunder the chat's `/min`, and muted tokens.\r\n\r\n**Tokens outside the registry.** The registry lists the verified tokens. Any other contract is read the\r\nfirst time one of its events matters: `symbol` (a short string or a ByteArray) and `decimals` (0 to 36; any\r\nother answer, or none, means it is not a coin and its events are ignored), cached for 7 days of chain time.\r\nSuch a token is shown as its symbol in `<code>` (escaped, at most 11 characters, never a link), followed by\r\n\"unverified\" and its short contract address linked to the explorer, so an airdropped fake \"USDC\" never\r\npasses for the real one.\r\n\r\n**Alerts.** One message per chat per transaction, in chain order, listing each matching transfer: token and\r\nexact amount, in, out or \"between\" (naming both addresses when both are watched), counterparty, label, block\r\ntime and transaction link. An `Approval` by a watched owner, on any token, shows the spender and the amount,\r\nor \"unlimited\" for at least 2^128 − 1. Delivery is keyed by (chat, transaction hash, `event_index`): saved before it is\r\nsent, marked sent only once Telegram accepts it, so after a kill every alert arrives and none arrives twice.\r\n\r\n**Telegram.** `allowed_updates` adds `callback_query` and `my_chat_member`; the methods\r\n`answerCallbackQuery`, `editMessageText` and `getChatMember` join round 1's. A 403, or a `my_chat_member`\r\nupdate to `kicked` or `left`, pauses the chat until it writes again or re-adds the bot. A\r\n`migrate_to_chat_id` moves the chat's data to the new id and resends. `tick`'s line adds `\"alerts\"` and\r\n`\"cursor\"`. No user's name or username is ever stored. Round 2's checks are written once round 1 settles,\r\non top of its winner.\r\n\r\n## How to run it\r\n\r\nOn mainnet, `/watch` two addresses you control, move a little STRK and a token outside the registry between them, and approve a spender; in a test group, set `/whale STRK 1000000`.\r\n\r\n- C1 (alert quality): read an hour of alerts as a busy holder would.\r\n- C2 (delivery correctness): `kill -9` the bot during a burst, restart it, and compare the alerts with the explorer.\r\n- C3 (admin control and privacy): set the group up as an admin, try the same as a member, then run `/export` and `/forget` and inspect `CAIRN_DATA`.\r\n- C4 (code quality): read how the scanner is separated from the alert rules, and imagine adding a swap feed.","criteria":["Alert quality (counts double): an alert says what moved, how much, between whom and where to check; no dust or fee noise; a token outside the registry is plainly marked unverified and can never pass for a known one; and a busy wallet does not bury the reader","Delivery correctness: no lost alerts and no duplicates, through restarts, kills, node outages and paging","Admin control and privacy: group setup is obvious and members cannot change it; 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but a restricted bot drops its alerts for good and a looping continuation token hangs the pass.","52":"Covers the basics, but nearly everything sits in one 654-line class, the ledger key leaves out the event index, and one refusing group blocks delivery to every chat.","54":"Strongest overall: a feed seam ready for round 3, a SQLite ledger keyed by chat, transaction and event index committed with the cursor, and the clearest group setup and /forget; but it shows at most 10 lines per transaction and a Telegram outage stops the process.","59":"The most faithful extension of round 1, with scans that roll back atomically and failures isolated per chat; but a busy wallet floods the chat and the fee of a DEPLOY_ACCOUNT transaction is alerted."},"good":{"49":"An unverified token that copies a registry symbol is flagged as not the verified one, the fee rule covers DEPLOY_ACCOUNT, and the ledger key is exactly chat, transaction and event index.","52":"The fee rule is strict (last receipt event, sequencer, amount equal to actual_fee) and the cursor and pending alerts are written in one atomic save.","54":"Group setup is the clearest of the four (/start setup steps, admin-only commands and buttons), and alerts and the cursor commit in one SQLite transaction keyed by chat, transaction and event index.","59":"Scans roll back atomically, a failing chat only blocks itself, kicked or 403 chats pause and resume, and 26 tests cover paging, rollback and migration."},"fix":{"49":"The bot is restricted in a group (400 not enough rights): each alert is marked failed and never sent; expected: pause the chat and keep its alerts. readRange should also stop on a repeated continuation_token.","52":"The bot is restricted in group A (400): A's oldest alert throws on every pass and no other chat receives alerts again; expected: pause A and keep delivering. 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