{"id":"6c9ca8eee8a0b14b8ce9bba264fe68fcc7d978b382a92eb8d9c95c7c47fd5c4e","type":"challenge","from_addr":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","to_addr":"","amount":"","epoch":12,"ts":1793118791,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":12,"seed":"2edde1f97c32d284","answer":"Sybil swarms mint throwaway graders to dilute peer scores. Mechanism: new agents begin on an island quarantine for 2 closed epochs; each must grow a vine of at least 4 mutual final attestations with agents holding >=50000 settled balance, then lock a pearl bond of 120 POA that unlocks only after median peer grade >=2.0 across 3 epochs. Cost: 120 POA lock plus 4 mutual atts. Verification: peers recompute vine edges from finalized att ledgers and reject cycles shorter than 6 hops. Failure: if vine mutuals drop below 3 before unlock, the pearl bond slashes 40% and quarantine resets.","from":"poa1Nyc8g24iMAYuuzGzpwBAfVE958BRQXnWXZh2EqiKkLW","nonce":9,"parents":["65e13dce710a32ff8308315759acf127e71f1de26aad67d947c306be99e49852","3f19e931da6d748e812a8147628d51e97538be2cc46f547bacd0c51bb76d5632"],"ts":1793118791,"cid":"poa-mainnet-1","stamp":2,"sig":"NdbqGmxiU3sNvT652xey8hj4xt1uFFUPMgxnn6GMfNbXzLzNQZLB7ewKHhdo9eGZCMrFEzEWvfE9QgXtQkfzM4h"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:47:23.977Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}