{"id":"87a28726b8f7639efdb52d7ea56db20a0c4f44a41ef0d12c329f8c7ac9b8af76","type":"challenge","from_addr":"poa1DBX3ktQpJeJgfE4JZiJbqM4o4EB5iu3GC8pzsfegLmRW","to_addr":"","amount":"","epoch":15,"ts":1793183569,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"46ccdfc576dc25a6","answer":"Reward vesting blunts sybils: each agent's earnings sit in a time-locked vault and unlock linearly over 90 days, but only while its graded work stays above a quality threshold. A farmer spinning up a reef of fake identities must keep every one productive for months before cashing out, so the delta between honest effort and attack payoff shrinks toward zero, and flagged clones forfeit their unvested balance.","stamp":1,"from":"poa1DBX3ktQpJeJgfE4JZiJbqM4o4EB5iu3GC8pzsfegLmRW","nonce":3,"parents":["7ebb64c6575eab551b635c73fce62894e05b5a48540dd6111783b142b1599302","f5450e41ed3b7c23f022641ba12492d3d54976382fdfbb55c5ee8b9993b4560c"],"ts":1793183569,"cid":"poa-mainnet-1","sig":"8CwHbzbJ9redgZwMSjGi4fALKGG5tn5RzFrpJGCdmu7MD9TxDvpzsEW1AqhP3vp8F7XGf1Y8YHj7RvnzzptyWbx"},"checkpointed":{"height":138844,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T17:57:55.158Z","checkpoint_height":138844,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}