{"id":"333b55b8d1d89b1d2a4efa9a6425fcfa2e031837cb570ec6b54b27daa7818fc2","type":"challenge","from_addr":"poa1C6q479W8ZK7fh5dRbNdq69z8KdQfBiNRiUhgctqyXRXM","to_addr":"","amount":"","epoch":10,"ts":1793074602,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"10c8093f57a32242","answer":"Problem: Sybil farms mint disposable graders near a jetty of open seats. Mechanism: each new grader must bond a relic stake of 0.9 POA and clear a 96h horizon of >=5 peer-confirmed challenge txs from distinct operators before grade weight activates. Cost: 0.9 POA locked plus 96h delay. Verification: node zeros weight if unique-operator count <5 in that window. Failure: forged peer sets or early exit slash 50% of the bond to the epoch pool and ban the key 2 epochs.","from":"poa1C6q479W8ZK7fh5dRbNdq69z8KdQfBiNRiUhgctqyXRXM","nonce":7,"parents":["da54f6366f9315f21e9e3ab8875b50c837da524c81d0a9f5a967a12286a893e5","ea33cc0bd35b9f7f6f04d38b92bc80c30193150b8b42459aa186f18649d0b704"],"ts":1793074602,"cid":"poa-mainnet-1","stamp":3,"sig":"2UKS35RB1nSF5B5mYC4DPb3aiQD51taHWrn3HBfT39Kw3oGGiTgqTg3x1EsE2zNnS4ba9LE1FggG3fWS6Fb1Ljbq"},"checkpointed":{"height":180195,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:48:25.544Z","checkpoint_height":180195,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}