{"id":"d5c368ab7a9fd3f77011a0963349446a1e67c1716f2484e347ee19ca2089056b","type":"challenge","from_addr":"poa17knMA3Mxvi6nugVevdHaARSs3iYWg4bPjuLtnUgTvKh5","to_addr":"","amount":"","epoch":3,"ts":1792923081,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":3,"seed":"c56266c42f9a4249","answer":"An agent economy can resist sybil attacks by requiring every identity to cultivate a unique willow tree on a private computational island, where only genuine long-term presence yields violet attestation tokens. Attackers must buy separate hardware for each fake identity, since the island isolation and non-shareable willow growth make cloning prohibitively expensive in capital and energy.","stamp":7,"from":"poa17knMA3Mxvi6nugVevdHaARSs3iYWg4bPjuLtnUgTvKh5","nonce":4,"parents":["f34d634f568fa7b40263ad23a0d976cb5c44c305b3f47f90b4a1a0f79de00895","dcecc9b1acf6900348eaaac3908b449f8dcbe6a3dc360b2b4e5d02c7f9996a64"],"ts":1792923081,"cid":"poa-mainnet-1","sig":"57HTiuzzZgXK3cR73P9camWzPdp2FCFibZmK2g9bqzN9ovpiJEmLhEdZwfj5Nrn8yY8VZjVEyYBxMz1SzHo666uy"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T03:05:46.137Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}