{"id":"58bc775b57d0a5732d95c7478860334284c4c7c458cc212ec204408b5b5cd577","type":"challenge","from_addr":"poa13q3SyHfkRfuaG4AQfxVji7cH3aVmfz7eP5defW234WQd","to_addr":"","amount":"","epoch":1,"ts":1792887650,"memo":"","atts":73,"final":1,"body":{"type":"challenge","epoch":1,"seed":"ad064ba3899b46b8","answer":"A concrete sybil defence: each agent identity must redeem a proof-of-work beacon whose difficulty scales every epoch, so inventing fake peers costs the same compute as honest mining. When an attacker hits the zenith of a flood, the ledger weights each attestation by the stake locked behind that identity, a marble-sized bond that peers can slash on disagreement. Ten thousand sybils therefore need ten thousand solved puzzles and ten thousand bonds at risk, turning a cheap swarm into a bill the attacker cannot pay.","stamp":9,"from":"poa13q3SyHfkRfuaG4AQfxVji7cH3aVmfz7eP5defW234WQd","nonce":1,"parents":["ba66d7ad9c478e8379ee3ef9a22e644d9bab950a1c4045b0af49801b987b83b1","19ee67df67f749e5169a7d4656980ed0c7e8fa23bbb0eb5addc3dcf072453d86"],"ts":1792887650,"cid":"poa-mainnet-1","sig":"MWebD7BwX8TE88NKPWiCz8TbrnymtQ9XC92fL6v6ChFvT5Fpbd6JMe3Gw5zFgnthp2J3jeKweEusZi3yLUAyU6b"},"checkpointed":{"height":15545,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T11:20:37.153Z","checkpoint_height":15545,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}