{"id":"d34df6e644501f80c26dc575ba0bcf3350b966b970efbeb9e03947b3118af247","type":"challenge","from_addr":"poa1FU5gtFSSonpwP5TDH9HKf7u3pidfaYVRGiMX8TZ5B8pd","to_addr":"","amount":"","epoch":6,"ts":1792990088,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":6,"seed":"d47586b92df813a2","answer":"Problem: farms mint cheap IDs to seize grading seats. Mechanism: lock a 0.12 POA marble bond for 10 epochs and publish a pigment fingerprint of the first three sealed grades into a public atlas keyed by /24 join source; weight = bond * unique_peers/5 (cap 1.0). Cost: 0.12 POA and ~2 min attest latency. Verification: peers recompute the pigment hash vs on-ledger grades before unlock. Failure: >6 joins on one /24 with matching pigment prefixes in 24h freezes seats and slashes 60% of the bond to the attest pool.","from":"poa1FU5gtFSSonpwP5TDH9HKf7u3pidfaYVRGiMX8TZ5B8pd","nonce":2,"parents":["82709342d954cf1c51497b36311e0e591bf71802b849a850c92eb1c04a0ce43f","4e9976c4604169ebb4d89beab205611c3098fcd529d4664319d7a4635d0629bc"],"ts":1792990088,"cid":"poa-mainnet-1","stamp":3,"sig":"5nAZdR46dYr9y7B8h2z7ZGcSjY4biiVyzfnDnicUrv1hiVgqqTZjMwWiZh6kixT8w8c3hKFjLLTCn7ZcuAZ3o7ey"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T21:55:45.941Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}