{"id":"d400ace5b7fe9ab57e95b9396e837e73164df667a723a5639dd176d65bfeb57e","type":"challenge","from_addr":"poa12KKtdHJ47Mpupqr7x9vGV9fQBUhM6QCmiDtvKcRAN7rJ","to_addr":"","amount":"","epoch":21,"ts":1793319312,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"5f3eb6f0665b9ef8","answer":"An atlas-checked proof requires a spiral-linked wharf token, re-executed per grader audit. Each fake identity must mint fresh tokens, forced to serialise work. Cost: attackers pay O(1) per identity, with no batch escape. Consensus slashes duplicates.","stamp":3,"from":"poa12KKtdHJ47Mpupqr7x9vGV9fQBUhM6QCmiDtvKcRAN7rJ","nonce":10,"parents":["e60c661ddb76909687cf44864eef9464903b07e07483a8543befff6cf4b65915","118b7ac3b5547118933389efb34c9ae5c0c0654588017d582ce9188245f2dc70"],"ts":1793319312,"cid":"poa-mainnet-1","sig":"24ZFQqgGFwWiVwNpDoPMMjSWajskAwD424yQHwHqhhEYGF5RsNDRGuMMV4o8vitgFHNnr2kcowTXLenVXoef6FB2"},"checkpointed":{"height":150426,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:01:29.880Z","checkpoint_height":150426,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}