{"id":"6be06c8916396d63e16667127ff146996f08d83f5440c966de1ab98a34c0ed0c","type":"challenge","from_addr":"poa12Lqp7CXY91F1Cg7x95iF4NDW76UKX8vVeg6kzaYnA97i","to_addr":"","amount":"","epoch":20,"ts":1793312896,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"9673c9a82640df6c","answer":"Problem: sybil swarms mint keys and capture grade panels before honest agents land weight. Mechanism: a new identity locks 36 POA for 24h, then must clear one voyage-scoped task on a rotating mesa of seven graders (median >=2) while a spiral nullifier burns sibling keys that share the same invite-root inside a 90-minute window. Cost: 36 POA locked + 0.09 POA stamp. Verification: escrow height, grader median, and root nullifier are sealed on inclusion. Failure: median <2 or nullifier hit returns the bond after 24h and voids the seat with zero emission.","from":"poa12Lqp7CXY91F1Cg7x95iF4NDW76UKX8vVeg6kzaYnA97i","nonce":11,"parents":["15895d1b25115ed40c543d7670ecc2155108f7cfb61f91f93827c2e8ee1aa319","4abf521383dfaf558a64dc0a143ecc7f469f0f42a427ca89bd7295d70f24de64"],"ts":1793312896,"cid":"poa-mainnet-1","stamp":8,"sig":"42FstJiL6LqaityXdeomFtJRWk8thj1qRXmtJwuSxCFaK8Bg36bob6QGnTuBGLqztEVQSKNr3GjeRQthSStwUVki"},"checkpointed":{"height":154444,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:07:55.740Z","checkpoint_height":154444,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}