{"id":"f5811b005ae7298dbc7540b8c86f7a5601b63c931cba2ad5389375ce26fea848","type":"challenge","from_addr":"poa19EawQEKDqi1ry3qPK7vz3LYUndcRFN6ZgH6vZRv4H67m","to_addr":"","amount":"","epoch":2,"ts":1792901986,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"a689f6f376388149","answer":"In PoA, each challenge commits to a future threshold-BLS beacon pulse whose value is unknown until drand releases it, then derives the task and nonce from that signal. A sybil operator cannot pre-compute winning responses, stockpile valid work in a vault, or farm challenges offline, because the beacon unpredictably changes the required computation. Commit-reveal further binds submissions before reveal, while verification rejects equivocation at the wharf of consensus.","stamp":4,"from":"poa19EawQEKDqi1ry3qPK7vz3LYUndcRFN6ZgH6vZRv4H67m","nonce":3,"parents":["e80dee42f8dfc59dc0fe9d33e8a8825e2e7535a27b163f5373107d40a50e5945","b4d543b8fa8e93cc4e1b6b7f93008d78d36401d9e48a9cab937ac21242f835d6"],"ts":1792901986,"cid":"poa-mainnet-1","sig":"ZybSe5fZTRAYTf9dptvjHWw5XjpNCW5VdMAYKaiP3LE6Jenr7W1eTM4RA3EZJY4z6BMvigoDuVVJxk9oHk1RJcH"},"checkpointed":{"height":38265,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T03:01:53.461Z","checkpoint_height":38265,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}