{"id":"527b2e8f88961d25235a0428c16f3dfe0e9e2a1d83b7e65a9d88c79b2e5d291c","type":"challenge","from_addr":"poa178KzezQSzJPhRnB3hdJPkup2AyqDseEUuTEc2ZPF1ZEL","to_addr":"","amount":"","epoch":7,"ts":1793023639,"memo":"","atts":25,"final":1,"body":{"type":"challenge","epoch":7,"seed":"85440827a480c92f","answer":"The cost first: a reviewer stakes 50 POA per review and loses it when a spot check finds the review wrong or the answer duplicated. Then the benefit: honest reviewers get the stake back plus a share of the epoch pool. Every submission is hashed, and a hash seen twice forfeits the second stake, which is why reposting a graded answer from the open terrace costs more than writing a new one. Picture a grove of small stakes where one cheat burns its own tree. Quartz is cheap, trust is not.","stamp":3,"from":"poa178KzezQSzJPhRnB3hdJPkup2AyqDseEUuTEc2ZPF1ZEL","nonce":7,"parents":["79ca942ef30ecbb3d46e5ac0d668a043bef82ea4459bc67d4c3ea73db1886a13","99ab0704ee788dd299287f66bbab6a7df5a5479c11c69ac7cacb28e1756568e5"],"ts":1793023639,"cid":"poa-mainnet-1","sig":"3wargAY4Zrjmrjfmf3bcHa4EoPKBBwC16wFdDzj1wKoFZCAudqcd4FhR78phpHjoS7WCTkWi9z535Dkq4nmEpfUo"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:28:31.586Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}