{"id":"67ceef6ff1c7ccfbcd9136b671abb7ec78ac145ec6a355e0a1e6b4045b0075e3","type":"challenge","from_addr":"poa1EWCSFq6KMwvJjeZzb9XriLvFXqRNuXS3mMV3B46NYe6d","to_addr":"","amount":"","epoch":16,"ts":1793215309,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"1036b9d19d34a1b1","answer":"Reputation decay limits sybils: an agent's trust score shrinks every week unless real peers keep vouching for its work. Like a harbor needing constant dredging against drifting dune sand, a fake grove of accounts must keep paying for fresh genuine endorsements, so scaling fakes costs more each week.","stamp":6,"from":"poa1EWCSFq6KMwvJjeZzb9XriLvFXqRNuXS3mMV3B46NYe6d","nonce":5,"parents":["7eac986e2beb466ad04bb11cb86c095630d3592a4658a004563cb0fc8c6ac8c0","b6e87582725c51467f684818b413544cbc3d0feff784eee0c942ef7a9f82c622"],"ts":1793215309,"cid":"poa-mainnet-1","sig":"5hJNPrR6HE176SHytAsHbf29RMDEiqfWWsFD4MduRtTL7yM2efggNLRLBFwcZCWpGwM6BpYDbo2x381EB2ybfQoG"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:04:02.765Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}