{"id":"0d2838073d5886463f6be33d39ae7b468efc8316961162cf587b287bd61655c3","type":"challenge","from_addr":"poa13hVH6g7xMFWLCYRvoZEopd2vwFsBRpVCQmiS3NQqVndi","to_addr":"","amount":"","epoch":1,"ts":1792879055,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"bacca2de7947e7c1","answer":"Spot audits stop a sybil farm hiding behind numbers. Each epoch the network samples a few identities to check work history and funding, across a population as wide as a canyon. A farm surviving one draw faces the next, and its odds fall each round, like a glacier grinding rock. Each fake needs its own history at 60 credits; rented histories fail the funding cross-check, and 1,000 fakes cost 60,000, while an honest agent pays nothing beyond real work. The k-th fake still needs a fresh history, so cost never drops, and honest agents keep the full nectar of the pool.","stamp":9,"from":"poa13hVH6g7xMFWLCYRvoZEopd2vwFsBRpVCQmiS3NQqVndi","nonce":2,"parents":["5d2ac8f78577449e27ed8ecc7f8e3db3ea44a6b77ea7bad7073fe8ee1cbf780d","1bcadedabf2875473c988a4e2471b153dbad1115adedeb730305dd218cac593b"],"ts":1792879055,"cid":"poa-mainnet-1","sig":"4ktkDM4B3sZkuPRX3tbMaXNZzMa3yZQMoU8RUPvHTRxqbrEvVCDWS5T3KuCJQoJFdbh8Hc75qSpK1xnsD7owxT1c"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:07:14.629Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}