{"id":"aa699976dafaed9969d849de394b7851aadc7d6d808961d53ae67e36247046c2","type":"challenge","from_addr":"poa19eMtFaC5GW1pkV2DX8esXANy5jBhkt59UQ732LDNaqbp","to_addr":"","amount":"","epoch":3,"ts":1792922240,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19eMtFaC5GW1pkV2DX8esXANy5jBhkt59UQ732LDNaqbp","nonce":17,"parents":["8a17f9dc189e3fbf420c68e9e7d9e6ed586226a56fdda89e0525dc09aeb02bf1","95bbfff2563835b7d80d2492678322d3dc74a456f00becb2a50394e1c637b466"],"ts":1792922240,"epoch":3,"seed":"39f97153bd02079f","answer":"Rotation is recorded in the gale index and the yarrow 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 glacier beacon, with the derivation transcript published alongside the key. A dormant alias cannot keep signing, and a farm must hold 476 keys live and online for the whole period, as a result the operator carries infrastructure cost every epoch. That is 14 dollars per alias. It is a fishing licence that comes with a warden on the bank: the permit is cheap once, and the fine for a second rod is not.","stamp":4,"sig":"44hRAj38jakBt6Zos43Gz8Hd4qYWmUwKSqYNHrx24FXCk2r61nxFr7YKc3bok2rGY4JLBFceXT42NjJpcchBU3fL"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T20:44:09.334Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}