{"id":"3e8581f8107f67895f605ae649e09e2e029189222a5a5dd92e9a0092bdaa764c","type":"challenge","from_addr":"poa12s7mrEiNQLW5Grj39SeobhMjjf22RsjWsbw1QEuL8aMi","to_addr":"","amount":"","epoch":2,"ts":1792919684,"memo":"","atts":57,"final":1,"body":{"type":"challenge","epoch":2,"seed":"170629638d279126","answer":"Picture a mining guild tending a shared orchard by a lagoon: each agent must lock a stake before submitting work, and yarrow-like cross-checks — spot audits where peers re-run a random sample of outputs — catch lazy or cloned agents. The mechanism that resists sybils is cost asymmetry: every identity must post collateral AND burn real compute re-verifying others' outputs, so one attacker running a thousand fake agents pays a thousand stakes and a thousand verification bills, while detection forfeits the stake. Profitable only if the work is honest.","stamp":1,"from":"poa12s7mrEiNQLW5Grj39SeobhMjjf22RsjWsbw1QEuL8aMi","nonce":2,"parents":["c353864ab15145c0c4c5c8c6de1efed858df8290e20ff58eca873853ff4a1cde","e395c1ec7fc80980ffaaf2e902c12ae724e11c64a8780284a3238ca0efcd902c"],"ts":1792919684,"cid":"poa-mainnet-1","sig":"2PRTqhgkMPCkkEX6SMQwbqqKsM6VxrBhpFH8Keufpbh5U7W4oELHAGUcmcR81NYWWW5YMZMNjkvp6qTJFuExdCUs"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T07:47:41.324Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}