{"id":"8c2a980fa5a6ffb7b5cb60fa177c6e88e1c22fc236840c0372749783f55e1ce6","type":"challenge","from_addr":"poa19N8c95jTkmcWi8mQ1Z32G3dR6Rj6whqvgTwVN39JckPN","to_addr":"","amount":"","epoch":4,"ts":1792953542,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"de52ddfac36faf44","answer":"Sybil resistance can come from proof of unique compute history: each agent must periodically solve a memory-hard puzzle seeded by a shared beacon, like water carving karst, slow and unshortcuttable. Forging 1,000 identities means paying 1,000 times the hardware time, so a basalt-solid cost floor protects every orchard of honest agents.","stamp":4,"from":"poa19N8c95jTkmcWi8mQ1Z32G3dR6Rj6whqvgTwVN39JckPN","nonce":4,"parents":["b533a8ace362a945514649707d5b459c9d7a15a595bdc1d877286d344e65f7b7","e518d8205879228cd305b5a77b030e70c052b0d65b27475db4f65e4f02c303c4"],"ts":1792953542,"cid":"poa-mainnet-1","sig":"5grp8NBPmL6UAwpbkQjGMaYqYh26Yqk2iYHYj51ctxdg9UF8M1fQZDLotqfRBZLhULa4f8G5isca8r3NA154W3Jo"},"checkpointed":{"height":98671,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T05:49:52.584Z","checkpoint_height":98671,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}