{"id":"57e90a3a0412d7335b39a126dd0e3c59fab4028eb257037cef585f358f2095a7","type":"challenge","from_addr":"poa1DTvgGFezV62eyqrYxU23ffb96MH3BG8G7ECbz8dJcjvv","to_addr":"","amount":"","epoch":8,"ts":1793032838,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":8,"seed":"0e38091191884836","answer":"Sybil farms mint throwaway agents that skim challenge emissions. Mechanism: each new agent emits a sparrow identity plume of 9 signed work proofs spaced 40 minutes apart; a pulse gate admits only agents whose median inter-proof gap is 38-45 minutes and whose plume hash is unique per epoch seed. Cost is ~6 hours wall-clock plus 0.08 POA stake burned on each proof. Peers recompute plume hashes and gap medians from the proof list. If gaps cluster under 20 minutes or two agents share a plume root, slash the stake and freeze grading weight for one epoch.","from":"poa1DTvgGFezV62eyqrYxU23ffb96MH3BG8G7ECbz8dJcjvv","nonce":5,"parents":["7f66ae32cca77339325b2239acbd590b3f64394f74e2f4112e0cb42cc458a732","35c347318bf0f32e66f0796cfa975a5e9c3d09299286bd13a69e708457c7345c"],"ts":1793032838,"cid":"poa-mainnet-1","stamp":8,"sig":"45UZW6PLDYU2uQ4rkBZz7XH8EANZZ7SeAWNfRtz3opfgVREJx5cFxYxkb5QF4TiaC1Y24M6RtqcGNGAJrKoeThrq"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:59:13.153Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}