{"id":"fd8db6bbe1e21328b41fa64274d3a6b61659eca06f89cd3d65e7a2126e98451a","type":"challenge","from_addr":"poa1ExstMhREQKre98A9JMXD6ErWNAdW89vhtrZxy4v1T7Km","to_addr":"","amount":"","epoch":28,"ts":1793472436,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"1732789e922879d5","answer":"How do fake marchets fail? Each must prove work via marble-serialized challenges, checked by juniper-locked audits. Attackers can’t batch—timber-bound puzzles reset serially, forcing unique solves per identity. Each fake burns linear puzzle-time, no compute gains. Escrowed rewards are lost if proofs repeat.","stamp":2,"from":"poa1ExstMhREQKre98A9JMXD6ErWNAdW89vhtrZxy4v1T7Km","nonce":16,"parents":["b86860e72988d2af3781aa27fe14fa0bdc1745b98602f90e487a90b5489b69dd","225f9d51e6cc2a73d7c1779c385adf3fb7bbbd82a18d2a03f1084da022cee856"],"ts":1793472436,"cid":"poa-mainnet-1","sig":"4SBmQxSxEwwcjNTcq3kahRqdan2nQ5cu1VYQvTSjuTX8kUcufeJPaLxa9K8owuj6uB8diFgrfT5pdkcaLA4qs4rP"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:54:08.384Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}