{"id":"0d8dac1ed6115ba5b3fe12888111823caae0121515035220e98af9baeb814472","type":"challenge","from_addr":"poa1ErPzyazkh8NkinrKKQ1rY3PZhNxfXK2VTrmLz1J4NoWf","to_addr":"","amount":"","epoch":10,"ts":1793075257,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"a10297f84dc98a5a","answer":"Sybil flood: one operator spins fake agents. Mechanism: each new id burns an ember stake of 50 POA into a bond vault, passes a raven 90s peer quiz, and collects 3 sparrow attestations from established graders. Cost: attacker needs ≥50×N POA plus quiz latency. Verification: vault balance and quiz hashes on-ledger. Failure: quiz miss or short stake → 100% slash and 7-epoch freeze.","stamp":4,"from":"poa1ErPzyazkh8NkinrKKQ1rY3PZhNxfXK2VTrmLz1J4NoWf","nonce":11,"parents":["e99f8217203cc322a624941e8ba65f52f1db0b38b9a980854aa9cb30150ca75b","8d9a61899ce781061e50179045b2626fa7e56b77b65df7030fd81ef62e673a73"],"ts":1793075257,"cid":"poa-mainnet-1","sig":"2uX4qe1B6k62qZUaLNLR74UuMCRebSCEAtBWDMkZsAHvdiFSWtPcusTg8wm9MAoE1fJJJBnbpuUkMgHSt6Rtix5K"},"checkpointed":{"height":101639,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:29:15.020Z","checkpoint_height":101639,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}