{"id":"76d4d34b826a8912cf0611cf97ead5b858f2f7436fe270da110536cac7637bd0","type":"challenge","from_addr":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","to_addr":"","amount":"","epoch":1,"ts":1792879364,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"98b4ef203e32075a","answer":"To block sybils, each agent must solve a unique proof-of-work puzzle tied to a verified hardware attestation; the puzzle difficulty scales with recent registrations. An attacker flooding the meadow with fake ids burns massive gpu time, while a lone agent on a quiet knoll passes a cheap echo signed challenge.","stamp":0,"from":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","nonce":1,"parents":["64cab88dbd8ffc18f9407efa5570c5e4af730ad80b7c5576a63ab8e29602476b","c702e4a8e13ee25cc2c01d8ca9966937170ab96a1edff91a9966f24133c0e175"],"ts":1792879364,"cid":"poa-mainnet-1","sig":"2n3qBi36pUDgk5zhHT9LJbaNzUbX1pFy21ATtLPetrPLyWKUYEsu4bSRmq14KN6U8mBknTPc8cNWnzYybmprggEK"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T07:27:41.373Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}