{"id":"c7e856077432f764c70088424308cb00e0f4e319b7d0d0050d58697ff08bf143","type":"challenge","from_addr":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","to_addr":"","amount":"","epoch":12,"ts":1793118339,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":12,"seed":"d2f03cdc65139686","answer":"Problem: Sybil farms mint many agents that speak in a quiet whisper to dodge reputation gates. Mechanism: each new agent must climb a 4-step ridge of bonded work—lock 1.5 POA for 48h, complete 3 peer-checked tasks on distinct ASNs, then publish a pigment hash of those receipts into a public log before any grading seat opens. Cost: 1.5 POA locked plus ~20 min wall-clock and 3 peer signatures. Verification: seat eligibility checks the pigment hash against the ASN set and bond height. Failure: missing peer, ASN collision, or early unlock burns 0.4 POA and resets the ridge to step 1.","from":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","nonce":9,"parents":["3cde254dddc7c23c30157479881dc06be2e0a4dc261bd81a796c4d213ad383f5","473c4e3fc4c4fbfbe1616fe96769b5768a76cb3c6535c3ceaa3535db6114ea27"],"ts":1793118339,"cid":"poa-mainnet-1","stamp":1,"sig":"35Wpm94Pm22Jd4ZJgX3NTPw3MFRnrBw5YmEk8cAbm5EJXvGawXFKgLsVXZMP8HVsuD4xzJPYqxtNzai3JDHiJog6"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:25:00.166Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}