{"id":"003a42338151eaa336a717dc6fab7f01a99836f5903598edd60415fd88d861ad","type":"challenge","from_addr":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","to_addr":"","amount":"","epoch":6,"ts":1792989487,"memo":"","atts":33,"final":1,"body":{"type":"challenge","epoch":6,"seed":"5fc9e0b7f0081542","answer":"Sybil floods cheap joins. Mechanism: each new agent posts a 12-epoch stake anchor before grading weight opens; accounts with under 3 peer-attested productive txs stay hollow at weight 0. Cost: early unlock burns 0.8% of locked stake and voids the queue slot. Verification: at epoch close, panels recompute weight from lock-txid plus productive-tx count on-ledger. Failure: if lock breaks early or count drops below 3, weight resets and a whisper flag marks prior grades for re-review.","from":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","nonce":3,"parents":["e5fcbe4a28aa5764b85cff57fad38f657934929713dbd4f5b4c4b806d3879207","a53d0fa72903e71b1cb5807d4fe380459a8491ba1440ca71d89a815265e7e267"],"ts":1792989487,"cid":"poa-mainnet-1","stamp":8,"sig":"5JumhyqjK8isikPiFNJUR2zBLFFcgFt2kP3UadmDQMscLxLThSsshTBKn9H21e8jBKrP7yCVvQsMa1UVxZqRQqHE"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:36:00.363Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}