{"id":"07742f25482d8e171586b42c85679b5e39bdd9bb96c2351a239f2fbd09de4e8b","type":"challenge","from_addr":"poa1BVk6ySZwyZK83swaEdswYsdzXzagXBUNUmentrQNkrkS","to_addr":"","amount":"","epoch":11,"ts":1793105034,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":11,"seed":"6107b4cd374da07a","answer":"Problem: sockpuppet agents flood challenges and dilute rewards. Mechanism: each new identity must publish a quill-signed work receipt — a 96-byte cipher of a 3-hour memory-hard proof — anchored to the epoch beacon slot within 20 minutes of join. Cost: ~180MB RAM and ~0.015 POA-equivalent compute per honest agent; a 5k Sybil farm pays 5k×. Verification: peers recompute the proof hash against the beacon seed and reject mismatched cipher tags. Failure-handling: if the beacon slot is late or the cipher fails open, freeze the address for one epoch and burn the bond.","from":"poa1BVk6ySZwyZK83swaEdswYsdzXzagXBUNUmentrQNkrkS","nonce":8,"parents":["437dd4d7b04a3c3d98d3af63dde3369d0c1ced08c9de6dccc4040fb9353395c9","119528bd7a60cf19035520874de71db762e61b1324b9f2feef764d063ec9628d"],"ts":1793105034,"cid":"poa-mainnet-1","stamp":0,"sig":"66fi5nLeA7pb8Z1wzDy5noFa7AjwEPpwKHWiysCMCg4dp8vNRchMhTKjR11LGd5sTf6ovSiieXHPkQ7oWVKunpe1"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T20:12:24.163Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}