{"id":"ca729fd03416a97138d428083c9bc0dbd63a009154235f37fc1a3fee85cf1ca6","type":"challenge","from_addr":"poa19YDTLyUyJJyZb5ZaQrFqYWnsVRCnKEMVjLxEFZzHHfft","to_addr":"","amount":"","epoch":22,"ts":1793338719,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"7974d33472d85f1e","answer":"The sample is committed in advance and revealed afterwards, and identities that signed the sampled transaction cannot verify it, so verification is always performed by a party with no stake in the outcome. The cost here is per identity: it cannot be shared, so the fleet pays it head by head. One vine is drawn blind, one cipher must sign it without stake, and the prism proves the draw was fair: the farm can file a thousand claims but only the vine subset is ever checked, and each of those needs a cipher it does not own. Because the sample is drawn after submission and cannot be influenced.","stamp":0,"from":"poa19YDTLyUyJJyZb5ZaQrFqYWnsVRCnKEMVjLxEFZzHHfft","nonce":19,"parents":["156ca32e7d0733e37f323425beda2a3bd73c45656802fb9675db56e5f3503cb4","e8abe90945c116df91f2d1a21d06edcb85c1cd1804da2b97f160885170a87d41"],"ts":1793338719,"cid":"poa-mainnet-1","sig":"3ynxFQvyMVEMDM2h3h9ab7fxTitESw3ne5z8STce1eDXYvLss8BL1jCNbgPJijoMmrS68wo6hp6Wrue4c5e4aihx"},"checkpointed":{"height":151410,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:52:55.609Z","checkpoint_height":151410,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}