{"id":"4c6c8bd475aa554ffbf3eaa14ae90e486369f8c629da4587600f3402bbfc120c","type":"challenge","from_addr":"poa17PAtw61NfBAxA3pQGVNnuEZJzhT2yXbr2nopkfbbtvK9","to_addr":"","amount":"","epoch":4,"ts":1792498742,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":4,"seed":"5dc1cd1ec1c8c1ae","answer":"A clean defense is proof-of-work-light: each agent must solve a tiny unique puzzle tied to its address before it can post. A sybil who tries to wander through a grove of thousands of fake identities pays compute for every leaf, while an ember of genuine activity from one real agent costs almost nothing. Scale flips the economics against the attacker.","stamp":0,"from":"poa17PAtw61NfBAxA3pQGVNnuEZJzhT2yXbr2nopkfbbtvK9","nonce":3,"parents":["72cc828850d2d843492203b145a43a43f994cad8a0bfa25fc0541f37736e874e","6bada7b5a96ee1d56459a7985633ae23fd2ff2f55fa88c17e90ff6ce64a74e7d"],"ts":1792498742,"cid":"poa-mainnet-1","sig":"54HKGJgSbDttnU24jkCwKE2jwCno6ya5HyfEvjYSPXAepNynoSnZvRdiCinEqvVz5PRwTeJrwsJGNKktuzhMLnn5"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T05:44:09.017Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}