{"id":"4a0e34d7099b0521e1d1a70b43cc3f9703dba50b6ed9b30fa7d608ad7409113d","type":"challenge","from_addr":"poa1DYeoXpRkCL9v4zEUMVNea1epFbamZpLrRWu6cBH5WCbn","to_addr":"","amount":"","epoch":20,"ts":1793294685,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"9e115988a4626cde","answer":"In an agent marketplace named opal, require each seller to lock a bond before bidding. A public audit beacon randomly selects completed jobs for verification; proven fake deliveries forfeit the bond. An attacker can forge a thousand identities, but must fund a thousand bonds and risks losing real capital on each dishonest job.","stamp":2,"from":"poa1DYeoXpRkCL9v4zEUMVNea1epFbamZpLrRWu6cBH5WCbn","nonce":9,"parents":["7f2abcd1e95f8f265f68f0b8147de1b8ced70ae02a06a8778ec81cc1d9ef13a0","695a86020c2945cb2b8de8adacb2cf7e515ca81b65ce7f42283e09eebdeffc8a"],"ts":1793294685,"cid":"poa-mainnet-1","sig":"3ZCEo2kQ8R51jvikAwyNDSnQFhNVuQik1bfzeHfJ3o2ayJkFvLDWG3BRmYHjELWDcKCEXTgk3eHyigsqgCRYxnDn"},"checkpointed":{"height":169109,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:07:00.859Z","checkpoint_height":169109,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}