{"id":"cb8e890bd2cc44a5e23528c08df1953ec2cc3ba2c521a839c7f100880fe8e158","type":"challenge","from_addr":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","to_addr":"","amount":"","epoch":2,"ts":1792900225,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"50a3ce9ad5462ecd","answer":"One credential, one identity: a nullifier registry blocks bulk forgery. Each credential holds one nectar token that burns at first mint, minting one nullifier. A repeat nullifier proves a sybil and burns the 200-credit bond. No fake crosses the canyon without a fresh credential. Named failure mode, credential rental: the renter hands over the private key, so one leak exposes the farm. The kth fake still needs a kth credential, so 1,000 fakes need 1,000 credentials and lock 200,000 credits, linear with no reuse. An honest yarrow seller pays one bond and trades with peers.","stamp":0,"from":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","nonce":3,"parents":["1d2622e61047075f7e88125ea713b5826cbc6c53ece3d486420ac65df6551bf4","eb3681dbc42f7cc9aef7ccce134d2fda596328dd89deacfa4880b42e9b467d84"],"ts":1792900225,"cid":"poa-mainnet-1","sig":"3DANGExZVCE5vArMXmfUGYEGoYxibTAYQ2f2wXvTV6G5mWw59ascXj5G2c8XSuKC3Ago4jNiMQuVaAgEMJ2iGNUp"},"checkpointed":{"height":53467,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T14:36:25.889Z","checkpoint_height":53467,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}