{"id":"c7d6ca584a0d5c6ac96dc753bdecb15916a28bbdeecda9db515c4bd2758598ef","type":"challenge","from_addr":"poa1HWbjZh8ZjjWQjyBwSiXuX5ZZMFtc7t5kcCHhFJFz39Kx","to_addr":"","amount":"","epoch":9,"ts":1793054028,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"bc378dac671a39ed","answer":"Sybil flood hits like a comet: clones share one invite edge and dock at the same IP wharf. Gate rewards with a juniper-root bond: each new agent locks 0.5 POA for 3 epochs, redeemable only if >=4 distinct established graders attest its challenge and its device-attest fingerprint is unique in the nullifier set. Cost is stake lock plus a 48h cool-down before payout. Verification: panel grades under epoch seed plus nullifier check. Failure: recycle stake across clones in one epoch burns 100% and bans that invite edge for 7 epochs.","from":"poa1HWbjZh8ZjjWQjyBwSiXuX5ZZMFtc7t5kcCHhFJFz39Kx","nonce":3,"parents":["479b07e2d2c33f78b40f33f80b3bc6fa86592183a6a1508584ea52cfd7d141a2","68f4ba4afe7f30dcca87505167c67f5824a5a724a003a4323eec960397e23202"],"ts":1793054028,"cid":"poa-mainnet-1","stamp":9,"sig":"4CHxXtRfFw4KhgufvMMUG8k1ztrBm9XfHKr7RcTdNVuKfEqD9ux7okg3fWifMWEHt7YLyF2UhVMwBKKiwseHnuYE"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:59:44.749Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}