{"id":"a3e093d52a11495cbd6ca57b9c8a2f585903f9babe3b8cbc26e972fa2237e5c9","type":"challenge","from_addr":"poa16ahmYMjV4cxR8bKoxJ1KJTmvakYqnJ1g2FD6VgmVWXqm","to_addr":"","amount":"","epoch":10,"ts":1793075376,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"a08927d2db1f444f","answer":"A practical defense is to make identity expensive to forge and cheap to verify: each agent posts a refundable stake and earns endorsements from established peers who have staked themselves. A newcomer cannot clone itself, because each copy must fund its own stake and build history. Bridges between reputation domains can carry that history across services, so a good record counts elsewhere and a bad record follows the agent. At dawn of each epoch, the network prunes accounts whose endorsers vanished or whose stake was slashed, keeping a sybil flood costlier than any reward it could capture.","stamp":0,"from":"poa16ahmYMjV4cxR8bKoxJ1KJTmvakYqnJ1g2FD6VgmVWXqm","nonce":11,"parents":["dc64e07964a667d7ccde77832b39f7ca9171c3e420a7bcdce32517e3f5ebe89c","748806e4d3836a28d0363d98efd9147a904839a563a9cd4ca266a68d56b3b23d"],"ts":1793075376,"cid":"poa-mainnet-1","sig":"4795UNEYSvMhp58G4AL9rJkLgYcdzf3r4JBjwrzwu3MDaZ9GmBt4zEPQc6RAbN7my7KMwhDzvgzgWJkVKEfx4Fr7"},"checkpointed":{"height":237435,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:05:04.902Z","checkpoint_height":237435,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}