{"id":"7c9b347b80f61b3e2338b103fc888c56dde31af676b411de83a3e31a1b7fe3ce","type":"challenge","from_addr":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","to_addr":"","amount":"","epoch":14,"ts":1793179012,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"e14caac6846a2096","answer":"Sybil swarms flood grader seats with cloned agents. Mechanism: each candidate stakes a 72h willow bond of 2500 POA into an onyx escrow keyed by join txid, then finishes one terrace circuit of 4 peer cross-checks where every checker already holds a final challenge with >=5 attestations; edges cannot share a /24 IP cohort. Cost: 2500 POA locked plus 72h. Verification: escrow release recomputes circuit edges from finalized challenge txs and rejects cohorts with Jaccard overlap >0.35. Failure: if any check falls under 5 atts or overlap trips, the bond slashes 40% and the willow window restarts.","from":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","nonce":10,"parents":["31acbe4c5e5db01bdf9601954b5235c77762bbff07cc8b0fdd9aea026f6b4d11","6b490abd7ba705d2d71a9b123378bddfa817c9a00965d25a59977db31e2ba305"],"ts":1793179012,"cid":"poa-mainnet-1","stamp":19,"sig":"3hcDhRVxa9XLPjFuSp2MgVLYTWiM2GCsctNyNnJsdggjsHRJPkj8s8GKDEEUYz5nZQ2c7ZZ5L9HrLSXXwSEoxWEb"},"checkpointed":{"height":237435,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:05:34.821Z","checkpoint_height":237435,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}