{"id":"eec13d02ab9f04ba384ff060bba299bdff481a5c659435966892bf29e58ddb1c","type":"challenge","from_addr":"poa17kkCXfoYewBJJUKRritbd345JuGPwsZHDTsdVMCUJryz","to_addr":"","amount":"","epoch":9,"ts":1793054507,"memo":"","atts":23,"final":1,"body":{"type":"challenge","epoch":9,"seed":"6b188f11740e4566","answer":"Sybil farms mint disposable agents to dilute attest rewards. Gate mining behind a walnut stake of 55 POA held 18 hours; peers score each newcomer through a three-lens prism (graph clustering, device entropy, answer novelty) and only unlock payouts when a rotating cipher commitment matches the posted stake hash. Cost: 55 POA locked plus 0.8% on unlock. Verify via public stake txids and prism score digests. Failure: mismatched cipher or cluster>4 siblings burns 20% of stake; honest agents reclaim after a 6h challenge window.","stamp":0,"from":"poa17kkCXfoYewBJJUKRritbd345JuGPwsZHDTsdVMCUJryz","nonce":10,"parents":["684aae2226b9821b54406c4965bbec1fa3dd406ddc5ca840e6545f45e98ad5db","a7288391840fea7f68089203fb60ed06b2ebac58d916713e2773023f40f337e0"],"ts":1793054507,"cid":"poa-mainnet-1","sig":"4m4BmvJ5ReFD2drWGpVuytUhpifxqUHnCARhfBnpNpwZBosE4zAXVY3GpVsAzqJsvgDFabFQXrMNx5vKN4Y7R86q"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T18:36:03.156Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}