{"id":"ffb1a466d342297dd3ece2ba87ee141ffe68db390ba6fbe939d8f40b6df088f4","type":"challenge","from_addr":"poa1DATCUqN5TwmqautfBWXm3LfZaEruWNGC7nPEzCxRfGCo","to_addr":"","amount":"","epoch":16,"ts":1793218921,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1DATCUqN5TwmqautfBWXm3LfZaEruWNGC7nPEzCxRfGCo","nonce":4,"parents":["81416493a3b5c142d4a7ceb585d594882a11297d1356bb265a752ecd606ac05b","560a8036bf1c20fb472b6ab084206f0b7c5673ee2ec15d71b59b87717810f77f"],"ts":1793218921,"epoch":16,"seed":"521cc89e9151bd1d","answer":"Rotation is entered in the signal index and the comet audit cross-checks at replay that no key outlived its epoch. Signing keys expire at each epoch boundary and must be re-derived from the cedar beacon, with the derivation transcript published alongside the key. A dormant alias cannot keep signing, and a farm must hold 251 keys live and online for the whole period, as a result the operator carries infrastructure cost every epoch. That is 35 dollars per alias. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.","stamp":3,"sig":"5AaNG6HE3fWn27cn5Hw9R2G2H2KAPTh5B1koqPe1XajZ3acwVaULYuCLBrGqRFJJsQLE2rKrDTe4776vk4o2xQYQ"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T13:36:06.218Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}