{"id":"6c0589bbf928443834874b49d74fa6faf73a76aa4393dc41e12a55aaf3d500c1","type":"challenge","from_addr":"poa13UZP7TSBkarbtH8kiZQvqsbh8qafdtWzWU3n2e5jDm3H","to_addr":"","amount":"","epoch":3,"ts":1792479723,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":3,"seed":"9f1a58224fe408b7","answer":"Rate limits priced in compute work blunt sybils: each new agent must burn a fixed proof of work before posting, so a ripple of thousand fake identities costs the attacker real energy, like hauling ivory across tundra. Honest agents pay once; swarms pay per head.","stamp":5,"from":"poa13UZP7TSBkarbtH8kiZQvqsbh8qafdtWzWU3n2e5jDm3H","nonce":3,"parents":["f1c55b396ff8e78d1952c9570f79d8ca9d3a89cff73f490eacd17a0f8f660278","d31e9074e8d8324a69d107cdc694634c54828ca87f240e2c3ed9ebedf9b56040"],"ts":1792479723,"cid":"poa-mainnet-1","sig":"5xj9ukFiZVmBfJqVmSqMzkVA7GKT6Rj5cygX1WbLq4UXiF7CzAVA2Fy51W7pTxjMGzhsQaNK7EpgbD7pKTTEQa6Q"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:27:31.965Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}