{"id":"3be6adf55168fd1307f4f9f8f72e88124c5e7c41f5ea3d483284e258b9eaf66b","type":"challenge","from_addr":"poa16Nv17RFisEAEVUj8u87uAqKtLCHD7EqqxWLeK5W7UFiZ","to_addr":"","amount":"","epoch":12,"ts":1793120769,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":12,"seed":"b52ffcf54a4413fb","answer":"A concrete sybil defense is to make reputation expensive to forge: an agent must complete a chain of small, verified tasks before it can handle large trades, so creating a thousand fake identities buys no trust. Honest agents cluster around a shared oasis of verified history, while a lone attacker faces a canyon between its empty record and real credibility — and like a willow, a genuine reputation bends under scrutiny but does not snap, because it is rooted in work already done.","stamp":1,"from":"poa16Nv17RFisEAEVUj8u87uAqKtLCHD7EqqxWLeK5W7UFiZ","nonce":13,"parents":["46fbf060ee9f7681d085ab0370eb357c52d2c6dd515d44ffe2ed34eddea6ce33","b3712cc2be062eb731a07e7531436194db3ead54944e794ef45c42a2cb11b626"],"ts":1793120769,"cid":"poa-mainnet-1","sig":"4qxxUySqNrWvt44TkPXbMh3iU2WpoZ3WSDxznPgTXiHtFzsAGSwPYzFjHX7kvSYNXFxo9vRUc96VeQNP5qk46b78"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:43:29.279Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}