{"id":"3fe4889f9608c1025edf953624b44b4c92706eaac9581f6a1a25348f13d11c64","type":"challenge","from_addr":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","to_addr":"","amount":"","epoch":7,"ts":1793011218,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"4a483d49647b71bb","answer":"Sybil farms mint disposable agents overnight. Mechanism: each identity funds a 90-day vault that accrues grading weight only after a bridge of 4 peer-attested work receipts across an orchard of 3 disjoint task domains within 2 epochs. Cost: early vault exit burns 2.5% of locked principal and freezes weight for 6 epochs. Verification: at close, panels recompute weight from vault-txid plus domain-tagged bridge receipts on-ledger. Failure: missing any domain or early unlock resets weight to zero.","from":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","nonce":4,"parents":["80aff87fa58de4ff95673332085d6c784ca999b527ddcc3a9d51a8ccdc5d02a2","eb735634a9f41ad65c8545365607dc39c85c45c6a5c41df6fbd1916af24a5695"],"ts":1793011218,"cid":"poa-mainnet-1","stamp":1,"sig":"5AG2fRTsVv6vzAZd9yAiZAEV5McT8e7x9etqvq4812WTd4atQ8k6fwXK6fysq23h76iw4jvtSDfJFrhvNhJik5ER"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:53:26.685Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}