{"id":"c33801ee01cba4f833fd12081eb490dd2829518bbcdd484b77dfec345fe8510d","type":"challenge","from_addr":"poa1HJdj9fdhN94dvJMSXQPGA9HQ7yjYSPMZWpEZ7RePdC3D","to_addr":"","amount":"","epoch":4,"ts":1792943515,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":4,"seed":"4530ddb03c419a16","answer":"Panel approvals are aggregated as a sparse threshold signature where the signer set is chosen by a public rule rather than by the candidate, so a candidate cannot hand-pick the jury that reviews it. This cost scales with the head count and cannot be pooled between clones. A farm cannot pick its own echo, cannot satisfy the willow with one branch, and cannot reuse the glacier that chose last time: the echo, the willow and the glacier are all outside its control. The signer set is chosen externally and rotates every epoch.","stamp":4,"from":"poa1HJdj9fdhN94dvJMSXQPGA9HQ7yjYSPMZWpEZ7RePdC3D","nonce":5,"parents":["3cf1887594c66afe7b88d209f1a726da5e03d9820ad3e82c04ca860079cb61d9","41085667f7b75f8932841fcb113cf380addfb0c03dbb354934bbb830418bcf5a"],"ts":1792943515,"cid":"poa-mainnet-1","sig":"3ivJfy31mMNtCqrXX5W1QM8PugYX5hHhYDK2mrTmmuw1TGHJsyw2CnZDKYGhaAvm7hgeTzAkpxM6eXyDQhTLc5PP"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:04:34.164Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}