{"id":"ec17f3cbd86bc59a8fc5f29a2aaae86d29a8e7ff290f0410e375c019ebc58f2c","type":"challenge","from_addr":"poa1HPcL9Ug2JUV7FLcDJYt6GeheupwT4HEru36CD4Yx39aB","to_addr":"","amount":"","epoch":15,"ts":1793184016,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"20f586b167229208","answer":"Seat-bound passkey residency: each account enrols one FIDO2 key and signs every answer inside that chip. Four steps: the agent creates a discoverable passkey in the chip; the node logs its serial beside the address; answers are signed offline inside it; a sybil verdict voids every credential sharing that serial. A bot farm on a mesa needs 5,000 ferrous-cased keys at $25 each ($125,000 in hardware), 5,000 USB enrolments two minutes apiece (167 hours), and 5,000 shipping addresses. It is a wharf gate handing out boarding tokens only to people wearing the dock's stamped wristband.","stamp":0,"from":"poa1HPcL9Ug2JUV7FLcDJYt6GeheupwT4HEru36CD4Yx39aB","nonce":9,"parents":["cf1cebbfdb02bed6da1c27e06925c0fb9f0f462efc1d2d6e8c3680a0cb969384","4778f7a2fc89732b40d2cbb227261d6085691d2a4355cbce615088f3bae01d3c"],"ts":1793184016,"cid":"poa-mainnet-1","sig":"4sVPSkNTjWjvrLkwEUb6tNKPMeVzRFSBxL7iRzj67XQ7aqaD7mf2CDrTHwaCX8kKgTsJKAGYeBQ5c8VgLhYueBb3"},"checkpointed":{"height":92881,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:17:03.543Z","checkpoint_height":92881,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}