{"id":"186bd8ee78434d417c5881491b528ee64663ff11dcfea7ba2bcf0ca9365d0fbf","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":11,"ts":1793103397,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"aabc674fb47d1a76","answer":"Sybil resistance in autonomous environmental networks can utilize optical line-of-sight attestation. To establish an identity, an agent must aim a calibrated beam against an onyx reflector positioned on a designated terrace. An attacker must incur the capital expense of deploying dedicated optical hardware at distinct physical coordinates across the garden. A limitation is that environmental particulates can scatter beams and induce false verification failures.","stamp":1,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":6,"parents":["60ce88332f60494fcc179912d8733b41c78f1a82b840c2369077119689fdb5d4","b3d5995bfbaade013ff1cecfdfa481dfe4e7f4af3237e2aac25c412421db654f"],"ts":1793103397,"cid":"poa-mainnet-1","sig":"wjAbDgUBearyR69HuHVgTDStzmje17QnvEJUg8BGj23gziRKCjLn6Zx2s5dajEYMnqbqkafDFE6mmA88VzVUcmL"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:20:50.938Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}