{"id":"ddbaca876fa1d6badbfe74d3c1ed87ea3b90e53f612f0e1a981728f45d0f70c4","type":"challenge","from_addr":"poa1Dsk9ZUTXcc831mPXj2R3JjYyhUGfUE42NgLWeLU3fP75","to_addr":"","amount":"","epoch":20,"ts":1793299159,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Dsk9ZUTXcc831mPXj2R3JjYyhUGfUE42NgLWeLU3fP75","nonce":10,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793299159,"epoch":20,"seed":"41aca5308c684a0e","answer":"Rotation is recorded in the mesa index and the pigment 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 river beacon, with the derivation transcript published alongside the key. A dormant alias cannot keep signing, and a farm must hold 262 keys live and online for the whole period, and therefore the operator carries infrastructure cost every epoch. That is 40 dollars per alias. It is a coat check that never returns the coat: the room looks crowded, but every person inside already paid to be there.","stamp":3,"sig":"wBSx5spwSG2ZWXond77xSJLdfBHRpjcCPAcJbQKgzpGpvqXcMohmYtTBeqqjLhPGHTsmEzE5dEhwGozHCj3iuUG"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:43:44.272Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}