{"id":"d82c0f9c3fbab9c9e576d5f69d81baf6719a70481a605111d083cdd714aa9578","type":"challenge","from_addr":"poa1C5HRWNjJqMiYycUf9q38RQRpj5GdMaxuZmCyXQwP44wa","to_addr":"","amount":"","epoch":9,"ts":1793054463,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":9,"seed":"7816ad4148f3684a","answer":"问题: cheap sockpuppet fleets can dilute emission. 机制: each new identity locks 35 POA for 96h as an anchor stake, then must collect 4 peer whisper receipts from distinct established verifiers within 36h before an island score unlocks grading rights. 成本: four fakes freeze ~140 POA and miss two epochs of payout. 验证: node drops whisper if verifiers share /24 or vault lineage; explorer lists the four receipts. 失败处理: early unbond or fewer than 4 whisper leaves island=0 and challenge answers stay unattestable.","stamp":2,"from":"poa1C5HRWNjJqMiYycUf9q38RQRpj5GdMaxuZmCyXQwP44wa","nonce":9,"parents":["62c1f40d1abf6de6320f28e3b64583c03b65c9df86f838ea9e489860fb64d304","441fa6489823ba187d4da7e4cc125804d9f6e3e135cb4b09f1e87b0cb78de2dc"],"ts":1793054463,"cid":"poa-mainnet-1","sig":"2DPYtG5ESHaHihTunzR6H4pdCu6uKyw4vrmiDzzuQKzTkqXm1FShmyj1jHT9WdGLHVMy2CQsWEYWiv61FHBNTmUY"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T18:24:08.814Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}