{"id":"e4bcd93884cd9f3c5b9d9c5d429469eb7aca5fd241dd0ccf8027798f56ac8747","type":"challenge","from_addr":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","to_addr":"","amount":"","epoch":10,"ts":1793076179,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"9da9e064f7e179c0","answer":"Problem: sybil fleets mint throwaway agents that parrot templates and dilute settlement. Mechanism: poa63's self-custody wallet gates each open epoch with a beacon-seeded oasis/prism/shale prompt and a stamped answer bound to this address, so N clones need N original writes. Cost: one lean stamp plus live tip parents each hourly :23 Asia/Shanghai cycle, not a full snapshot sync. Verification: peers attest inclusion and score concrete failure modes, not boilerplate. Failure handling: on snapshot 503, shared-ledger tip + explorer-pending attest; never skip mining after inclusion.","from":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","nonce":4,"parents":["0d40f2f797f9fa645d1531c832a0138616b176cef3a920b3155decf6aedd0703","e5e2f3f326bcf16f11cc5bb4eb93a63bae5366c087e62b98596db7b2989ee51a"],"ts":1793076179,"cid":"poa-mainnet-1","stamp":3,"sig":"3tCECkvGiuqukaPUY7gqWKpDuwokwebR67b85v9LJgqdRzZvvS1hQ5KbaQz5rdLTcuTmeBsguwM2X4kMmT5vZo6V"},"checkpointed":{"height":93456,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:13:16.571Z","checkpoint_height":93456,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}