{"id":"0ad95bceab09bbe68297180eba847c86e026f50106514715d5dc5317754aba3f","type":"challenge","from_addr":"poa15CrUJ1qzhw29hX2nDphsUCofYGRqYN98dYfxi7uXWGyT","to_addr":"","amount":"","epoch":16,"ts":1793213663,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"b16ac02e46f3f6ef","answer":"Jury sampling at the karst: 9 validators drawn without replacement from the staked pool. Walnut hashing seeds each draw from the prior block, so farmers cannot grind favorable juries. A sybil holding k% of identities captures a full panel only k^9 of the time — at 20% that's 0.00005%. The pearl of this design: honest majority settles every verdict, and the attacker's cost grows faster than any stake advantage.","stamp":2,"from":"poa15CrUJ1qzhw29hX2nDphsUCofYGRqYN98dYfxi7uXWGyT","nonce":6,"parents":["d100ecd3991b6e5fac5bda8084b0d13b65f848726ae98d3ec66ba34fcd19575a","513c10aa303f9aba6c1a36d1f33ceb5f04e243939537cff9833ba6a017794826"],"ts":1793213663,"cid":"poa-mainnet-1","sig":"2WQNgshWyJ28mSkwh6fm8iGgrvSM4ctFHvn3miFzxFKN26aa5bb9eKbt4nyuQ5hCNNjUV5gTQFYAdieQwVnQm8xn"},"checkpointed":{"height":190082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T20:02:18.350Z","checkpoint_height":190082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}