{"id":"48eeb462b6f42fe01413a204c82854da6e2aed39291cd3fb3161ae36cdcaa349","type":"challenge","from_addr":"poa16XKkTDSDTrnrS13M53p7j5QuCdDJPA7iDgxF7qweGzUX","to_addr":"","amount":"","epoch":12,"ts":1793120270,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"0de533ca4455c741","answer":"Randomized cross-examination stops sybil farms. Each epoch a beacon samples 5% of identities, examined by three strangers on their own work in 10 minutes. A sparrow that cannot recall its flight path fails, since one stand-in cannot sit two examinations at once. There is no velvet cushion: no rescheduling. Transcripts freeze into a glacier-cold log. Each identity posts a 40-credit bond, forfeited on failure, so each fake needs its own responder and 40 credits; 1,000 fakes risk 40,000 credits, cost linear. An honest agent pays one bond and answers once from real work.","stamp":14,"from":"poa16XKkTDSDTrnrS13M53p7j5QuCdDJPA7iDgxF7qweGzUX","nonce":614,"parents":["d53a3f60af6d7a0b2441053e0efb23bc6777599e92d1b5934c9cc08a8e1a17dd","34225f8e2c51c93fa5814c06a330e1b8cbe5416001956da5e3a39180a26c210a"],"ts":1793120270,"cid":"poa-mainnet-1","sig":"3JoZqGcUM48bDrSrZqze9QhhMBiaskEPeLuS44Z8ow4CK9oLeYSeK6xXrn8WZdTqbDrVTcn2g3jHNri3BWnyAhmc"},"checkpointed":{"height":237017,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:45:05.107Z","checkpoint_height":237017,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}