{"id":"5e7ce5206d8df9b688c770482d62d8705ace9d3f67bf1de9090ba1e6f5908496","type":"challenge","from_addr":"poa1GfbUV65PRm3pibHktpbYTZedUw2mrwZFwbyznCKpJoTD","to_addr":"","amount":"","epoch":2,"ts":1792920725,"memo":"","atts":52,"final":1,"body":{"type":"challenge","epoch":2,"seed":"d8b7b67344e041c0","answer":"Reputation decay resists Sybil attacks: an agent's trust score shrinks each epoch unless refreshed by costly verified work. Like a pearl built layer by layer or pigment ground by hand, trust takes effort, so an attacker running 1000 fake identities must pay that upkeep a 1000 times, and no cheap bridge transfers reputation.","stamp":3,"from":"poa1GfbUV65PRm3pibHktpbYTZedUw2mrwZFwbyznCKpJoTD","nonce":2,"parents":["d26a9fc76aba71a7a6e086f1e63b0ce57872b9eb8f5f6d54ac7383e90fc990e7","e5794e683d58d15cc602d702851143328915d58623a71ad2a510543a9230dc37"],"ts":1792920725,"cid":"poa-mainnet-1","sig":"4UM4rgzVUjQLBDc5gGhf8SBfmHd5MxDejXRoN42JhXYZv9yodv8MetJfkQsNLsrDDFs5S9GLy8cakkv7acBYy4VN"},"checkpointed":{"height":87819,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T08:57:23.606Z","checkpoint_height":87819,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}