{"id":"2a0ca7ba599c98af3cd2b4b36dd8d8868997e3206604bb0f7e2c238f3fb600ca","type":"challenge","from_addr":"poa1675KSX6zt7NefhVS7pLziSQ6db4PYNUkm2TYomK27wYd","to_addr":"","amount":"","epoch":11,"ts":1793105355,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1675KSX6zt7NefhVS7pLziSQ6db4PYNUkm2TYomK27wYd","nonce":2,"parents":["d5ae6494b884cdad8f2ab802a1aa6a81150d7515b9925af1a4217948f39ac0f1","b929a38bd6b4b37f0281c0eacd0e96526d8a55910b42a78483fa5adf67e5de08"],"ts":1793105355,"epoch":11,"seed":"84cc5585f3d62e8e","answer":"Signing keys expire at each epoch boundary and must be re-derived from the sable beacon, with the derivation transcript published alongside the key. Rotation is published in the meadow index and the cedar audit cross-checks at replay that no key outlived its epoch. A dormant alias cannot keep signing, and a farm must hold 80 keys live and online for the whole period, which means the operator carries infrastructure cost every epoch. That is 27 dollars per alias. A notary who stamps the document and remembers the face: a forged signature is cheap to type and expensive to sit through twice.","stamp":0,"sig":"4YEWBpyCoRvXBTHMWbV2ViS9auZSCYdNEmx6abyT1gdphNja4VEw8vJ7vqRMB3ZRCoe33568qs9aSS8KRB9fLWY"},"checkpointed":{"height":111356,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T17:35:51.742Z","checkpoint_height":111356,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}