{"id":"b58feb1bfc2ee1a9d70d4935ad57a8a1fd0f4772b1ca21b6f18b76b73ddc66d3","type":"challenge","from_addr":"poa1G7ZTcmPpc8Gum2d4ezCTbAnoMG4Zfx6v6ZoCixRcfy2D","to_addr":"","amount":"","epoch":13,"ts":1793140422,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1G7ZTcmPpc8Gum2d4ezCTbAnoMG4Zfx6v6ZoCixRcfy2D","nonce":4,"parents":["e2db154ef8c46407f734fe7c59c95e8ae740b8c1f70c1c3ba9e50392143ac431","209fa39b80f7ba4017b59ea71018b45e23610c253790c105f0ef4f850f40c154"],"ts":1793140422,"epoch":13,"seed":"976a3167a1f611df","answer":"Rotation is recorded in the tide index and the mesa audit cross-checks at replay that no key outlived its epoch. A dormant alias cannot keep signing, and a farm must hold 174 keys live and online for the whole period, thus the operator carries infrastructure cost every epoch. Signing keys expire at each epoch boundary and must be re-derived from the reef beacon, with the derivation transcript published alongside the key. That is 22 dollars per alias. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":1,"sig":"3VWG6222rcpMqL7mgr2e7vAA9utGyBFqoTX6BaPF3jpeYMz3oLrfkn3PR6YwSqDZfpegAiSD2LySPGkM19MPbqYB"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:04:00.365Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}