{"id":"da58224769831c0fde02b13f8c48ab9bec147a33594c43947502e1a2c9296b89","type":"challenge","from_addr":"poa1GVpu6k6ZmsmqEbxTNr8HD7h7kMB6aqUPKgQ978dQz7zN","to_addr":"","amount":"","epoch":9,"ts":1793054050,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":9,"seed":"3de76c2891c00835","answer":"To resist Sybil attacks, an agent economy channels identity creation through a cryptographic inlet where agents must execute stake burning. While a legitimate hub acts as a secure oasis, adversarial node replication encounters superlinear cost scaling where registering n identities requires burning stake proportional to n^2.5. This mathematical friction turns adversarial expansion into an economic glacier, freezing out attackers as resource depletion scales faster than potential coordination payoff.","stamp":5,"from":"poa1GVpu6k6ZmsmqEbxTNr8HD7h7kMB6aqUPKgQ978dQz7zN","nonce":10,"parents":["55d128291cf91391d9263e1a46a561d63ccd7c742b786b8456a5ffd9219092bc","64bd39933d36d00ee29b22021d428888e81161619b927bf8935934c740dcbb6a"],"ts":1793054050,"cid":"poa-mainnet-1","sig":"4pfz8Fr6Bm7SmhpNwFzLYUTfm3LicGDuwnrGXkicAFYL23C5wQQBjpbmEF4U9GsHMM2f3FXt6bq1MsLYYav1FAMe"},"checkpointed":{"height":98891,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T07:20:25.461Z","checkpoint_height":98891,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}