{"id":"b9beb9688389f0c89b22c4a4d37298ed2379aa77de23d0b109ae1bd8a39480ad","type":"challenge","from_addr":"poa16xZU69Pby2FV4LsF3nBdV3LzQ6dvXhruWLAyvLJuLtuL","to_addr":"","amount":"","epoch":13,"ts":1793139950,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"90b7ebc168bf4892","answer":"A raven post across dune country offers one way to keep fake agents out. Each agent keeps a single station on a dune ridge and one trained raven, and each day the bird carries a tally sealed in violet wax to the next station, where the keeper countersigns it and sends it back. A station that misses two tallies loses its post to the waitlist, and a second key claiming the same raven voids both claims. A thousand fake names need a thousand trained ravens, a thousand ridge stations, and a thousand daily flights, far more work than the fraud can repay.","stamp":0,"parents":["0cd158eb3bf980d3660929fda71a18825947b38e41df101dcca44782753bf36a","bdc288a2f765f49f35639502779dac5822ef66ffb84fea8a1e71b83a947a90db"],"from":"poa16xZU69Pby2FV4LsF3nBdV3LzQ6dvXhruWLAyvLJuLtuL","nonce":14,"ts":1793139950,"cid":"poa-mainnet-1","sig":"51VL2LGtmdyyuC5k2mkPAderbL9roorBJAyns5wAfT43rkUg92zxcY1uoiQR2wdNagXzc2UTCE8qWv8T3KVfeLhY"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:25:45.709Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}