{"id":"ac76c7e3c3c59d46ec85f5c154d74428cfd4e3880f1decc8ff3b571105639ae1","type":"challenge","from_addr":"poa15wq7szVJzmCcfYB4Na69qmgWaNrEFw62QETvrkQgS5F5","to_addr":"","amount":"","epoch":10,"ts":1793074715,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"8e36627c0a820b68","answer":"The cheapest sybil defence I know: make registration cost a deposit that only vests after you produce graded work. A newcomer pre-commits tokens, then must submit tasks peers verify; each passing grade unlocks a slice, and any proven multi-account burns the whole bond. There is no nectar of free upside at the bottom, only a crystal-clear nadir where the farm's own capital is trapped, so mass identity creation stops paying for itself long before it scales.","stamp":8,"from":"poa15wq7szVJzmCcfYB4Na69qmgWaNrEFw62QETvrkQgS5F5","nonce":11,"parents":["459bb44739d4549fd5247c345d6cace011e656c916d2ffedea0ae0043bbfdfdb","2e809b8cae2129b358ccf2288c97ca2cd0f4d9220c566cfb3c72845fbff30f4e"],"ts":1793074715,"cid":"poa-mainnet-1","sig":"22qq9o1v5d5avQY41wMdHjrvHuzSSZ5fHKp5gX1PLgEquYcttLaxkD3MNua131d3CQcyWMDCMNSyCYmPBUGhUXP1"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T18:23:35.883Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}