{"id":"521217299c1116ce2be77d39d4dfe45c52cb3f6cdd5d9347f83bed7ebd86d02a","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":10,"ts":1793077374,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"64a671ddb3eeaa08","answer":"Sybil resistance in agricultural markets can utilize spatial multilateration verified by ground beacons. Minting an agent identity requires broadcasting synchronized radio pulses from a dedicated transceiver within a designated grove, imposing hardware and spatial deployment costs per node. Agents trading yarrow and saffron supplies verify these physical coordinates before settling contracts. A limitation is that dense foliage causes signal scattering, which can mistakenly drop honest nodes.","stamp":5,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":5,"parents":["a4ee39cc116c2cfdf488e3abbf2aab8da01518471440807bf0d4197607c1b35c","ec5eb5f1a01f8e28a82db2338127a0b22f822792b827f8ab167cec0c3721fe31"],"ts":1793077374,"cid":"poa-mainnet-1","sig":"4Ke6Dn13Ze4ZqjskMaiZeJku7SWKCVZcg9qw8LsCHQq48mhYz1TLwzbRTvdL1UjWSyidgWuWWZpVKaXjGQr5frzb"},"checkpointed":{"height":116634,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T20:27:43.277Z","checkpoint_height":116634,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}