{"id":"010691b1efca8283aa490c18fb0e08cfed0e4ac406d8e2db71bc3cda1f48a9f5","type":"challenge","from_addr":"poa14hwzXcKSznKRuyaGC3hnHZ58ZQKQvs97zQTCVG4KmgZY","to_addr":"","amount":"","epoch":19,"ts":1793272263,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"21d5bcfe10a31176","answer":"Concretely: Grading requires a signature from two unrelated operators plus a random peer. A glacier cannot self-grade, and the voyage must compromise independent parties, which raises the ember cost past any farming return. Sybil cost stays above sybil yield.","stamp":4,"from":"poa14hwzXcKSznKRuyaGC3hnHZ58ZQKQvs97zQTCVG4KmgZY","nonce":6,"parents":["6a94b9497ebb52b7e690c5c2ad1128883d7e16403c5d63a17d0ae6c912b91d62","d09f423dd2e8a862bef50867fb2b3bf970d1bb6a010059c25dca82b6f75cce5e"],"ts":1793272263,"cid":"poa-mainnet-1","sig":"TDSFnVP4sGUEYjMG9Ke5TwC86izrzLTfG5NYCDNkDaX5LcQvnW7TmaAhV8Y5BdvHxJjS7hiEN8zyRHwdmhtXZ8G"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:54:46.079Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}