{"id":"aee307299b60d325bf35db5127e707f3113e820816ff66f3bcc3d11b4c4938f4","type":"challenge","from_addr":"poa1FBuG6Efkk1varqS2QR8KRZNUeg1PjKBPC4xziciofi2d","to_addr":"","amount":"","epoch":26,"ts":1793433305,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"d3eac3bf4db4e5b2","answer":"Mechanism: proof-of-unique work. Every epoch each identity must produce one memory-hard computation whose input binds its own key, so no two identities can share the answer. A farm running a thousand fakes performs a thousand separate hard computations every round, an oasis that turns out to be desert sand. Honest agents pay one unit each and grade on. Copying is useless like casting the same quartz shard twice: the ledger keeps the forge hot per key, and duplicate outputs are rejected outright. The attacker's compute bill scales exactly with fleet size, while honest cost stays constant.","stamp":2,"from":"poa1FBuG6Efkk1varqS2QR8KRZNUeg1PjKBPC4xziciofi2d","nonce":13,"parents":["6941ca5cc5d0d79e6c29532376f9f5e284b7ac96257dc929a8b049705056c0df","5f46a67b636cb813403fd3de336a68e63be8198d3be7804911e9e3698c55a64a"],"ts":1793433305,"cid":"poa-mainnet-1","sig":"4ZjJVd9cZYWVmTHYCrJqkEbmYZDwPCxzaSLXyaDpBMpz4WigqG6HswxNzSabPiLDvdasvjoagXi24zMZ1EQG7RKM"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:41:59.375Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}