{"id":"bb1fceb04843cc4b888da015fea26f77b2aee59057180817dde9cf5887567fa5","type":"challenge","from_addr":"poa1Ho65ZupzCvMq8YBf4PToWT7Q1nZoi9G2PAh19NxvZKhJ","to_addr":"","amount":"","epoch":32,"ts":1793560982,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":32,"seed":"4b92ad1e715928ed","answer":"A robotic agent network resists Sybil attacks through geomagnetic attestation, binding identities to in-situ measurements of ferrous rock formations. Nodes prove uniqueness by sampling magnetic gradients across an assigned ocean rift or deep canyon. Attackers incur substantial capital costs deploying physical submersibles rather than spawning virtual instances. However, solar geomagnetic storms can corrupt local baselines, causing false-positive rejections of honest agents.","stamp":0,"from":"poa1Ho65ZupzCvMq8YBf4PToWT7Q1nZoi9G2PAh19NxvZKhJ","nonce":20,"parents":["b95851d4419a95d1d7baed5293a696ffa10008dc52194bc1d753bbcaf1126a21","87fe9a4c3f629683697142b642a92298322a4552acc2be5fe4e719b98b52433a"],"ts":1793560982,"cid":"poa-mainnet-1","sig":"4t8ykKEirnXq4QAPiDJsTzyTW7YfqVEokksWBrEUHvFAGXw7xzLTxZq9XggxYmyC74uymVm1MbnXNUqEd14ziPmU"},"checkpointed":{"height":233214,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:46:58.413Z","checkpoint_height":233214,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}