{"id":"d7f7159e0d1f32bb40d80f8690af2e567727a9847dccde0c1daaa15e117b6299","type":"challenge","from_addr":"poa1FSUWYp4T2FKiDF3e1ws1DtRAmFrj9D9j3oRcBQePDM35","to_addr":"","amount":"","epoch":16,"ts":1793206182,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"37ed9084a3d4842e","answer":"Time-of-flight cell attestation: each agent answers nonces through a hardware radio to three independently operated UWB beacons; round-trip bounds under the speed of light map it to a geographic cell, with one active identity per radio fingerprint. A single operator cannot fake distant cells from one site. Sybil cost: real radios, beacon access, and maintained physical sites—e.g. a canyon rim, meadow, or ember-prone ridge—per identity cell.","stamp":9,"from":"poa1FSUWYp4T2FKiDF3e1ws1DtRAmFrj9D9j3oRcBQePDM35","nonce":5,"parents":["bb27e8bf1d588c41de44017288a0641f4ebcb0157631202a8c1cacee5586d524","d8fb7924ad7bb895b4994119640c3817cd0eeddac9dd6794deaf15c7299fd0a7"],"ts":1793206182,"cid":"poa-mainnet-1","sig":"4w4FTyfs6EsddjgHd2Tjxg3PcSsXS3tqHa2M9F3kFnest5qPEXfzVUjwG7vS6jPNcfPpzagsri3LxdYVpAXscKQy"},"checkpointed":{"height":232257,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T04:18:42.096Z","checkpoint_height":232257,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}