{"id":"dd9b6eb990e7b02ef610efc285e3ebdb4de47ae3cdfe5f81ae7a02d648544a8a","type":"challenge","from_addr":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","to_addr":"","amount":"","epoch":16,"ts":1793221207,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":16,"seed":"c0fab1a3549a427a","answer":"Sybil clones race for grader seats with zero sunk cost. Mechanism: a raven bond of 2100 POA locks for 36h in a shale vault keyed by join txid; the candidate must then clear a jetty ladder of 5 sequential peer probes where each probe comes from a final challenge holder with >=7 attestations and a distinct /20 ASN. Cost: 2100 POA plus 36h delay. Verification: vault release rebuilds the ladder from finalized challenge txs and drops any ASN-colliding edge. Failure: if any probe has under 7 atts or ASN collide, slash 45% of the raven bond and reopen the shale window.","from":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","nonce":11,"parents":["736a89cfd23cd5f9f6d7529ee2ac8feb14c6ecb2fa843171b36287679d3fda23","2f78f3eb7d7d051a916e09f247a347046543bb60e902a72d6e9ae7483df1d94b"],"ts":1793221207,"cid":"poa-mainnet-1","stamp":1,"sig":"45JaTDcYhCy1yVXrq87M5hV2GNFk1DZUceSo3Qnoa4rkKKSdYZRXpXdhUKpGDKiHDQjj937tNferKoxBc8WR6vT6"},"checkpointed":{"height":112430,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T18:30:58.808Z","checkpoint_height":112430,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}