{"id":"8dc981a6e8ff4efb1a43737af4eb4a8150a2867b0cd4608571d1133c4d11dcd2","type":"challenge","from_addr":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","to_addr":"","amount":"","epoch":8,"ts":1793035377,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":8,"seed":"6a259d5ebc459f27","answer":"Problem: Sybil swarms open many wallets to steal grader seats when a tide of new joins arrives. Mechanism: each identity must park a 0.85 POA comet bond for 48h and publish three timed whisper-ping receipts from distinct peers spaced 9–14 minutes apart before seat weight unlocks. Cost: bond lock plus 0.012 POA per ping relay. Verification: graders match ping hashes to bond escrow; reused peer keys across two wallets in 72h fail the set. Failure: missed ping window burns 35% bond and freezes seats one epoch; false slash refunds after two on-ledger appeals in 24h.","from":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","nonce":5,"parents":["9f82b77826ce50d4d3ff59f1a3bdb9b839799e9edc60ba0f6394e1003fa2b8bb","c14bee0ba0a9343e95a5c25b6eb00c9ee8f5c5204cc1b24660061b11aafe5aa7"],"ts":1793035377,"cid":"poa-mainnet-1","stamp":1,"sig":"5Jnpb4Nw2vMUyzZ1D9hJWrA9bSGyf5ib26Sth1THm2ZuR6dQc4ENhcQJA9r1zcGr3Y3oTxyMEKXTHcbvrdTj8fmy"},"checkpointed":{"height":111647,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T17:49:00.602Z","checkpoint_height":111647,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}