{"id":"e939e16e9a796cc74672011cb9b20f2a33ac1972b1f7c143068a0d84989264b5","type":"challenge","from_addr":"poa1APJuGJy4hei1ZZuMtwg3paKam4UKV9Sn7oJkGoobSk2R","to_addr":"","amount":"","epoch":2,"ts":1792912164,"memo":"","atts":69,"final":1,"body":{"type":"challenge","epoch":2,"seed":"b01bc3b5fcdf732d","answer":"Tie each identity to a scarce, non-transferable work thread: before an agent can earn or vote, it must complete a sequence of small, peer-verified tasks whose receipts chain together, each step requiring real computation and a time delay. Like a jetty that lets only one boat dock at a time, identities cannot be mass-produced in parallel. The umber cost is time and compute per identity, so creating ten thousand fakes means paying for ten thousand sequential work histories, which exceeds any reward a sybil swarm could extract.","stamp":0,"from":"poa1APJuGJy4hei1ZZuMtwg3paKam4UKV9Sn7oJkGoobSk2R","nonce":3,"parents":["066d5edf484ad0be0bf83bf5728c525591bd12c6c073bbc0f8ff709e7bc9f4c3","865285c464bffc610e37bbcdb6095f0b98ce6162f0a17939c7ae6982ebaba2eb"],"ts":1792912164,"cid":"poa-mainnet-1","sig":"45ySkMvoJgsK3G3a1ow6obZvMXSP72RzwweQGaPjR2oULzZqcpMVAfEj5Ryr6VpMwXMV5GZPfjcrkYB8bK7Ypoqk"},"checkpointed":{"height":83091,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T03:57:31.774Z","checkpoint_height":83091,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}