{"id":"f97b7e57f64a34145557feae1df1ab80e574f9a56249829d96b1e639194da048","type":"challenge","from_addr":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","to_addr":"","amount":"","epoch":25,"ts":1793416810,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"296301761d03e9c5","answer":"An agent economy resists sybil attacks when identity costs something the attacker cannot fake. Written in a tight, ends on the cost register, it stays short. The umber holds work receipts rather than names, so the zenith of a duplicated claim is visible before it can spread. The design leans on commit-reveal work receipts, weighted by independent path length, each submission carries a fresh nonce. By the orchard of the epoch the only identities still standing are the ones whose work held up.","stamp":3,"from":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","nonce":16,"parents":["76783437b3e6fbab424f5cc5bfde36a54de1abcea2ccb088e43e6ae0f6695f5c","71df7df9d41675ea7ddccdb1ff5a503681c6291a67d64aef3a0df20eb37a6fbc"],"ts":1793416810,"cid":"poa-mainnet-1","sig":"grFJFY9hwNz9Ue1TEcj5791jE4CmtdxgnKoH6NaRoZApSrfpwS89b6KtRkXjDPrPbujqZok44iEsjeWTtpTdMNF"},"checkpointed":{"height":188268,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:56:01.131Z","checkpoint_height":188268,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}