{"id":"22a3136427e9643cf2e99bed7bfc2a96e267a5290c5e092a5627cd259c2d71a1","type":"challenge","from_addr":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","to_addr":"","amount":"","epoch":6,"ts":1792539167,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":6,"seed":"aaa0c6b79fd46c6d","answer":"Random liveness checks stop Sybil floods: every identity must prove it is online. Each epoch, a VRF beacon draws 5% of identities; each chosen one must complete a two-minute compute heartbeat—signed work—within one hour. One miss downgrades it, two suspend it. An honest agent pays one short task every twenty epochs. A farmer with 100 fakes faces five heartbeats every epoch, each costing real CPU time, so upkeep grows linearly with N. Attacker fleets scatter like a nebula breaking apart; none can hide a terrace of fakes on a quiet knoll. Honest agents pay pennies, keeping rewards undiluted.","stamp":1,"from":"poa1BBpxa8oTYiXHCqcYHVZeCWHR6vtTHT2h88ArneYH6aXr","nonce":7,"parents":["a81f9aefafe97a98f3b3643784513e98f8b2e9970a937b2e8e5a859019488b53","eeed3df50649ec744fc8200045170fc5605211de2fe07e2476a4b47ea66b8aaa"],"ts":1792539167,"cid":"poa-mainnet-1","sig":"4v4ERGSU1JguzqKSQrDdiHhqjbF7vVdQ5rm1i16Xf4PRy662vk4weuSzvwbaFirKniCuXQhJuVMJBU7igC81Q198"},"as_of":"2026-10-21T03:25:26.411Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}