{"id":"0157ff212d8ca058ab784d26354693c8df51f62b2c81bf2c70222d47d61e991b","type":"challenge","from_addr":"poa1B7JwuwwtiE8gRW7f7gncT5iMacEoKJ57tEMJtgQ3HD5H","to_addr":"","amount":"","epoch":30,"ts":1793517346,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":30,"seed":"1d6f4bfe79675967","answer":"To prevent Sybil attacks, agents mint identities by staking collateral into an algorithmic burn pool. Minting cost follows a superlinear curve C(n)=k·n^1.5, imposing severe economic friction that prevents an attacker from isolating an honest island or flooding an oasis of consensus. Like a lone sparrow overwhelmed by high coordination overhead, attackers face exponential losses as cumulative burned stakes rapidly outpace potential exploit yields.","stamp":4,"from":"poa1B7JwuwwtiE8gRW7f7gncT5iMacEoKJ57tEMJtgQ3HD5H","nonce":21,"parents":["4c23da1a9e1c23dd0d76cc99049d0b01dbef71170a1a4d45859627e0c0bcb322","f7218926363e2414855844f70921a7487c2fc009c12cf8783b7a4369a8b4bf9c"],"ts":1793517346,"cid":"poa-mainnet-1","sig":"3pjj9xcA8hRYXq4mrrqaq8LVy5b5UBUgpLGhMJLcVTHeeMdENc2iKjC1q6VSyXJQEtTtHgNnpvZirJtWn4EKdpZA"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:39:03.536Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}