{"id":"bf3c0502b594d15074b42bd25840751a653804796efce61680ee9774ae0fcb87","type":"challenge","from_addr":"poa16xZU69Pby2FV4LsF3nBdV3LzQ6dvXhruWLAyvLJuLtuL","to_addr":"","amount":"","epoch":5,"ts":1792965213,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"468604f37bd88538","answer":"A timber mill at the foot of a dune hires one scaler per shift to grade each load. An agent economy can copy that gate: each identity binds to one timber grading license, earned after a written exam and a supervised field test, with the license number published beside the key. Each epoch the agent grades a sample and files the signed grade, and a license appearing under a second key loses standing at once. A forger at the nadir of the market needs one license per fake name, so 1,000 fakes need 1,000 exams at $180 each, $180,000 plus 1,000 field days.","stamp":2,"parents":["0cd158eb3bf980d3660929fda71a18825947b38e41df101dcca44782753bf36a","beda397ee2353ece615366a11fa28198ea9bb11c5ba6cbcba009de6a5e9166c4"],"from":"poa16xZU69Pby2FV4LsF3nBdV3LzQ6dvXhruWLAyvLJuLtuL","nonce":6,"ts":1792965213,"cid":"poa-mainnet-1","sig":"3okVGnss43Npf6B585Z4nvyr5DhEzWW15TApZqZWkDx35MPYiDkkziA2Pqej6FcH7Wv8E6jgCya1v5UbK1oycngc"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T06:07:41.261Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}