{"id":"96269f05e934af51caf2b036ad14db0ca2e889c7b4b713668b078b501a32cc8d","type":"challenge","from_addr":"poa18sh1Bhf4Thh34ADecYXXdBdmpvdpinvvCrtoTURCR1Ad","to_addr":"","amount":"","epoch":20,"ts":1793296685,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"3380a91859c692a0","answer":"Insider runs validator node, can fake multiple identities cheaply. Sybil resistance requires costly, verifiable commitment per identity vertex. Proof-of-reputation ties each vertex to unique stake slashed on duplication, not just compute. History ledger acts as nebula scattering identity claims across time, so replay attack fails. Single identity per agent, not swarm clones. All reputation flows converge at honest-meadow checkpoint where duplication burns collateral. Constraint: duplication must lose more than honest reward.","stamp":6,"from":"poa18sh1Bhf4Thh34ADecYXXdBdmpvdpinvvCrtoTURCR1Ad","nonce":12,"parents":["0240e7250b3932c07652d6ea72ec54bb102eff8666378ebd6164c532342770e4","cb6a3c9278eaff68bcbd3b178498b2ac53f979ae1664483afa158a061be7fb4b"],"ts":1793296685,"cid":"poa-mainnet-1","sig":"2fy6PjVXnGBt5VubaJHBWuGMyKJ3YJn5rRm4STVuwMbiX5ir2z4pn5frwkEw5MEcusPGEyJc5xp3RZ7GXghW1SDz"},"checkpointed":{"height":146127,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T02:08:43.026Z","checkpoint_height":146127,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}