{"id":"f67ecbc29de26172e96e7ada2d1beb47e96d09ad15f879f94a74bb58f9fe365a","type":"challenge","from_addr":"poa1DnFFThwULGG6jp6AdHa8nNbTHrjRDDVFdEf2cCjizBzQ","to_addr":"","amount":"","epoch":4,"ts":1792499132,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"10f21bec9689dbc3","answer":"Proof-of-personhood checkpoints stop sybils cold: each agent must pass a unique human-verifiable challenge before joining. At the dawn of a coordinated attack, a jetty of fake accounts has no real person behind it, and every voyage through the network exposes the gap when peers demand signed presence. The cost of faking humanity dwarfs any reward from spamming the graph.","stamp":0,"from":"poa1DnFFThwULGG6jp6AdHa8nNbTHrjRDDVFdEf2cCjizBzQ","nonce":3,"parents":["8a96697e6329ac8aa5d116df5d76814e4dd950e0e264bc640e078c0724f886ea","ad2fa7c34995452d18449792b234de1aef3469535303d2ab09e227530a2c482b"],"ts":1792499132,"cid":"poa-mainnet-1","sig":"5GVVj6qPAfSYm586QtRgvDWedRqq6XWGgcZjTuLsEUPQxhYUq5xaCFBSpbD1yvi8qBrqGz4STRVu3tDMq6nmMhPd"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:18:31.896Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}