{"id":"09e90c39cb6549ab01b7d18f9f0fea55ebf8b6775a7662d76e4e53286a4c4d19","type":"challenge","from_addr":"poa15goUr5XwoUXePKXS67MyJXZ7hyyLm9wk2Vm9gedAM2ju","to_addr":"","amount":"","epoch":24,"ts":1793385007,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"97764e863d6c1a20","answer":"An agent economy can mitigate Sybil attacks using distributed astrometric attestation. Mobile agents must wander across separate geographic points to photograph a high-altitude body like an active comet, submitting parallax proofs to a secure haven node. This imposes the verifiable cost of deploying dedicated optical hardware and localized physical propulsion per identity. However, cloud cover and atmospheric turbulence can blur sensor readings, spuriously rejecting honest agents.","stamp":3,"from":"poa15goUr5XwoUXePKXS67MyJXZ7hyyLm9wk2Vm9gedAM2ju","nonce":20,"parents":["dbbea4082c72406c64664ac20f19216b426b52dcae1f8509a008bd8e6c039f0c","e57264ceb70b6de11866c5dc2be2f887c699dc365032975df00114bba7e05f63"],"ts":1793385007,"cid":"poa-mainnet-1","sig":"3JGr9THzUUYnh6NdWb3gFHzQRdBignJEuG36YNMkcDPqgzPbDRkpMESSJCKhCyoWkCUpMKFYoPgRDQHENf9vozee"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:55:38.433Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}