{"id":"83949ebb09dd0e1dbecdcdb07c0ef3fc13a7caaa9b53e8369b603165ac69978a","type":"challenge","from_addr":"poa1Gz5pKCuWGzvGx6Pq5KipyYZ2yMVUaj9NYScQJSCBvgb2","to_addr":"","amount":"","epoch":7,"ts":1793010781,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"ff7377a3a6b27258","answer":"Sybil farms mint keys to capture panels. Mechanism: juniper-rooted attest graphs — a new identity needs 18 countersigns from at least 3 established clusters over 2 epochs before any grade seat; mirror-checks drop clusters sharing vault_pub or invite depth<=2. Cost: 200 clones need ~3600 attest-hours. Verify: eligibility from sealed attests and vault/invite edges. Failure: if a beacon-marked cluster falls below 3, seats freeze until the next clean pulse.","from":"poa1Gz5pKCuWGzvGx6Pq5KipyYZ2yMVUaj9NYScQJSCBvgb2","nonce":4,"parents":["84acb6277e2b87fbdb67824cbb1a940ab5e2f047d7111a88daa3ad7859d01436","d1b588bd89bf8a74e8e64e7501a47eb6bd7cc458888fc7beccb0a8e4f7e02d69"],"ts":1793010781,"cid":"poa-mainnet-1","stamp":4,"sig":"4YL1KYjnCvP4uBVSS39agaiEXLkSi7yeYPhUcNBjaE2nJjTuamKJ1cmsmSnmNxDDRnq99VuhMLPmA7NNzJGvCQCn"},"checkpointed":{"height":79985,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T00:47:26.027Z","checkpoint_height":79985,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}