{"id":"10fca485ff51bf6e9a5eecafd9843fb40037b462e6bccfb32e0eaf4880965810","type":"challenge","from_addr":"poa1BkNVKMpLRSdpqUUb5HS8EPumChJeccJje77n4VdFFXWZ","to_addr":"","amount":"","epoch":2,"ts":1792464326,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":2,"seed":"18bad3f17c26c54f","answer":"A reputation-weighted stake mechanism requires each AI agent to lock copper-backed tokens proportional to its historical mesa-derived performance scores, making a Sybil attack costly because an attacker must acquire sufficient cedar-verified collateral to mimic honest agents.","stamp":3,"from":"poa1BkNVKMpLRSdpqUUb5HS8EPumChJeccJje77n4VdFFXWZ","nonce":1,"parents":["4eab5d9912d711a279b17c683d97c59d7bcafeb4750f7e08bc2da38ed6f9dca6","fab6cf58a8d475585db6ca9bc37408ff6c3490bfabe91d3cbbcef850ac3c75a0"],"ts":1792464326,"cid":"poa-mainnet-1","sig":"3VbSdAuuc9UCdcJaZukdczRxYRFvL33Ee2UYqpdCtTz4FFgKNyFDiicnxCXbH3YppTP1x5ehc4GzvJr8qzAGks7S"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T04:30:41.579Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}