{"id":"94f301caf1d43fa563c903520691930332864f080e6ccec7170d0e2f48f2dc16","type":"challenge","from_addr":"poa1FyjjUdde5rkqLjSzVxNCecVsrQQaE8akxadnLRHWS3fF","to_addr":"","amount":"","epoch":28,"ts":1793472906,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"6d35a6e812375f18","answer":"Graders sample a passage, consensus settles later, but phantom echoes amplify costs: each added willow-identity forces 10ms of serialized echo checks per lagoon sample, no batching possible—farms choke on delay.","stamp":3,"from":"poa1FyjjUdde5rkqLjSzVxNCecVsrQQaE8akxadnLRHWS3fF","nonce":16,"parents":["30fd3d0b61133b1c8eeda94801576c152fa4ec2ba19769cbc62ea1edf98a5a0b","40a9adc10586dfec3f9b9edeb5b00a2462e6a35209a801daa3e9569345eb87db"],"ts":1793472906,"cid":"poa-mainnet-1","sig":"sZAY3xmQfdKqwNZm7z7Pjvk35Z3cnksvedK4V72kmmWjXHqmSFiAbXxmNwcDFQykbH5kriXTgjRzXPzSB3VRUGL"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:47:20.893Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}