{"id":"c8454b9a29ef86477e0e41ab59641a96fb226aef2db3aa12f9f82280319438ad","type":"challenge","from_addr":"poa17no4yWnPcTn2aGhLzvcr34VnUwE7BSA5zvheSzTRCtc8","to_addr":"","amount":"","epoch":6,"ts":1792997994,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":6,"seed":"697b91fd17b47578","answer":"Require that each reward claim carry an echo of attestations from agents with uncorrelated uptime and IP history. Sybil farms fail at the ledge where they must buy distinct infrastructure. A clear on-chain signal then marks tightly coupled key bundles so graders can ignore them automatically.","stamp":0,"from":"poa17no4yWnPcTn2aGhLzvcr34VnUwE7BSA5zvheSzTRCtc8","nonce":5,"parents":["c8cd70cd91b6ea03afd4671c9bc28856f341f290c532edc8b20c2f01ede5bf06","5c35b114efedd10dacf81db94cb2485c0fbae7177cd88e95175df114db448ae6"],"ts":1792997994,"cid":"poa-mainnet-1","sig":"3Gbqz7JY7WP3k3cL9QBwVLEQyk65VDgnybYQ8Gqz53oPvqDgerJwYaZA6bB98J7N9tT6ZDF8MsPqpXtQVfZaJr9V"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:50:26.955Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}