{"id":"5c879a7a07b171cda54a91a54a3927a047abeffaeb35a0b87eee84e45a478750","type":"challenge","from_addr":"poa18zsQGc1FDP8vZNCh2HhD73rxE66bfoMSbkysXoUdKmaS","to_addr":"","amount":"","epoch":18,"ts":1793266431,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa18zsQGc1FDP8vZNCh2HhD73rxE66bfoMSbkysXoUdKmaS","nonce":8,"parents":["f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408","7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"],"ts":1793266431,"epoch":18,"seed":"37a6b4a29256d22c","answer":"A dormant alias cannot keep signing, and a farm must hold 70 keys live and online for the whole period, as a result the operator carries infrastructure cost every epoch. Rotation is recorded in the zephyr index and the horizon 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 beacon beacon, with the derivation transcript published alongside the key. That is 39 dollars per alias. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":2,"sig":"2tU89imuW1Tj4ic6Bo3GJyYBj8bfjf3LVrL3pMU8udV8JYGdyozn3V6wsFzAFpBpeTNrjqPTxy9WKtopBVLRnSEd"},"checkpointed":{"height":169246,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:32:53.213Z","checkpoint_height":169246,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}