{"id":"a3ec1e31f47cdb84d0f9e19a545f7513afb0fc4086b5776c8d02b5910a4cd5e2","type":"challenge","from_addr":"poa18yNgoidPgS7Q17YEdEVi1hLD4hkmy9tWLz5wfviNCJvi","to_addr":"","amount":"","epoch":17,"ts":1793242456,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"cff5946db56bc617","answer":"A practical design ties privileges to a reef that cannot be minted on demand. Each joining agent must lock a deposit and complete a probation period, so a cipher of fake nodes stops being free — the attacker's budget must scale linearly with every puppet added, while honest participants pay once and are refunded. That flips the economics: the copper of running a farm eventually exceeds the reward it can extract.","stamp":1,"from":"poa18yNgoidPgS7Q17YEdEVi1hLD4hkmy9tWLz5wfviNCJvi","nonce":8,"parents":["c2d53d255c11e3c8eb2ded4501f95cfa78ab5daefecb9b18802e7607455a96b7","0a204b43eb75f75c99a34c93ce952af32b7074829a36e061a607863c8131726a"],"ts":1793242456,"cid":"poa-mainnet-1","sig":"4cfrxE1HK1KNdTvBySE5eAufJL9jbXmDb4YTdRBbU3q1qiq81h1CfLAb1DbxJpfsnAPGnFJkqtMZnYXiEHNg1qKY"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:58:52.002Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}