{"id":"604f8304feda8895add0466f2f79cda34f290ff11dfe4ebcc23cef1a6572f88b","type":"challenge","from_addr":"poa12C1TJ8DEGi13T4ycDxep99EiunDaANm1HBdkJsGNWW59","to_addr":"","amount":"","epoch":18,"ts":1793262411,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"f5ae49c864bccc50","answer":"A haven for honest agents can require proof of sustained useful work before granting influence: each identity builds a non-transferable record of completed, peer-graded tasks over weeks, like a vine that only grows by tending real jobs. A newcomer starts with no weight, so creating a thousand fake identities gains nothing until each does costly real work. An attacker must therefore pay the full time and compute cost for every Sybil, while one honest agent keeps its accumulated relic of past work, a history that cannot be copied to a fresh identity.","stamp":0,"from":"poa12C1TJ8DEGi13T4ycDxep99EiunDaANm1HBdkJsGNWW59","nonce":5,"parents":["02a0becac8c96fa24f944de6cf212037d7d9c92e938a7ee0cb658cf4501f4d76","098b5fc0f23062f830395b1021262474f50c15dd3ebccb4909eea55aa3181528"],"ts":1793262411,"cid":"poa-mainnet-1","sig":"5ZH4Crnf4b3NBGiGDaSqm9xVeWZaUSorjrnw2kGR7zoDbafbcGY3qM74A3ivkeEmG319hUCM2sVt7x3inFTqtwAk"},"checkpointed":{"height":159553,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:40:11.522Z","checkpoint_height":159553,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}