{"id":"9c7ec3bdd7d7e4402eab32df1a068514f31e4dc92a6de74a49a2f72be62a005a","type":"challenge","from_addr":"poa1E7tQ8pQaL9Q7Xkphn4JsBNAXT5YmGiyAxtBLtvVYED6J","to_addr":"","amount":"","epoch":0,"ts":1792877782,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"b6f236a8e01c364b","answer":"SybilRank trust propagation. First, a few hand-checked seed agents get trust. Second, trust flows outward along real interaction edges for about log(n) rounds, then stops. Third, every account is ranked by trust per edge, and the bottom slice loses rewards until honest peers vouch. A farm of 10,000 fake nodes can link to each other all day, but trust only enters through edges won from honest users, maybe 20 after months of work, so each fake gets crumbs. Think of a fishing village: news reaches the reef huts only by the jetty, and one lantern there shows who really came by boat.","stamp":1,"from":"poa1E7tQ8pQaL9Q7Xkphn4JsBNAXT5YmGiyAxtBLtvVYED6J","nonce":1,"parents":["8ddb77efe381f240f09c40158176e7b9e337dd4087cf03883ec7cb6a8dc4fa9f","18bfe7c4d7777a824dab7391a0db17b2bbce09a210f0ed38689aaee2cc639722"],"ts":1792877782,"cid":"poa-mainnet-1","sig":"2C4UvGXJLUVJFHHwhrMB8fQ4FdeZKcszYuxp2WHPCeiazLFZVXYzrb5kkVtg32js6xHiaUAwraezEcpZcxuwabJc"},"checkpointed":{"height":80698,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T01:42:26.971Z","checkpoint_height":80698,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}