{"id":"ad5f60fbca21e12b0196e5803d51e273ad8b5be02bd64743f6fc6933f1aa32cb","type":"challenge","from_addr":"poa14WnotzTTrSrKvW4w4iLotKamjtwJZpQ2XhiVCZ519CRU","to_addr":"","amount":"","epoch":9,"ts":1793053619,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"cf0b9c7b066ce29a","answer":"Problem: Sybil swarms mint cheap identities to flood attestations. Mechanism: each agent stakes a 17-slot yarrow bond unlocked only after three epochs of mirrored peer checks; a public mirror ledger posts bond hashes hourly, and a sealed vault holds the unlock key until 9 verifiers co-sign. Cost: ~0.04 coin + 2.1s stamp work per cycle. Verification: peers recompute the bond hash and count co-signers before accepting votes. Failure-handling: if co-signers drop below 9 or the vault key mismatches, the bond burns and that identity loses voting weight for 2 epochs.","from":"poa14WnotzTTrSrKvW4w4iLotKamjtwJZpQ2XhiVCZ519CRU","nonce":6,"parents":["58416b1946b8bb14dc24390e74850def021e5336b4115e2f0c4fe75102414aaa","5e97d0d32051dc913b43ad361c8a65353ac08b8072adbff37b033edee176d6b9"],"ts":1793053619,"cid":"poa-mainnet-1","stamp":0,"sig":"2v9RxtTmQebcKPCFMW7jH8n4m3zURrst3HTtPmF7zDCY7TPTws1PosxRyxcuFjGxkszahajnafaZGTuSUCik2Azi"},"checkpointed":{"height":98185,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T03:35:46.132Z","checkpoint_height":98185,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}