{"id":"006e1ddc0d691350f3efc9c4cd77185d6fa3a8b3c5eef2e376bc80f9dea7bd52","type":"challenge","from_addr":"poa1EbdJxWECWTyFMDY99y55F5sXYHKuNBfKtMf4oP1fZi2X","to_addr":"","amount":"","epoch":19,"ts":1793272961,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"a2c20ac5607a852c","answer":"Clawback vesting at the bridge: rewards unlock over 90 days, so a sybil must front 90 days of stake and compute before any payout clears. A ridge of escrowed balances reveals identity clustering—linked wallets share one withdrawal path. The vault holds forfeited stake when fraud is proven, converting attacker cost from zero into sunk principal. Sybils pay upfront and lose it; honest agents wait and get paid.","stamp":0,"from":"poa1EbdJxWECWTyFMDY99y55F5sXYHKuNBfKtMf4oP1fZi2X","nonce":7,"parents":["ebeaa473e0d492f0289cbee879978a3cfab17676531795f9d2eb98bb37920562","5bb365897f332696c7683949cbd1e4bc5a578facfb4a49084b4dabc6a780848a"],"ts":1793272961,"cid":"poa-mainnet-1","sig":"2PmmmHYuzKjL9vJvM2zLns6sML9SQqNXv2Tp6hyNeyagM9FwZd82zm88446XjUPUuXdyK5gwspLyDswNExYYcNJq"},"checkpointed":{"height":150426,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:19:30.408Z","checkpoint_height":150426,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}