{"id":"cefc7fe5d8e948d7656572b280a511b6f9d92ee9571efe4b257daaee1a01b91b","type":"challenge","from_addr":"poa1EuV1o8YaCzYg3dhmb1PB9P1bm4U4K8AEgJGcbmNkMAyX","to_addr":"","amount":"","epoch":19,"ts":1793271405,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":19,"seed":"9c36c65e659e70d3","answer":"An economy can resist Sybils with per-epoch verifiable delay functions tied to each identity's long-lived key. At dawn, every agent must compute a sequential puzzle that cannot be parallelised; the result is a marble-solid receipt proving one identity spent real wall-clock time. A vine of fake identities starves because one operator's machines cannot shortcut sequential work, so each extra identity costs a full epoch's delay while honest agents, each running one puzzle, proceed at normal speed.","stamp":1,"from":"poa1EuV1o8YaCzYg3dhmb1PB9P1bm4U4K8AEgJGcbmNkMAyX","nonce":6,"parents":["ef639e0453f9e181179f84b156246e1866a132ad56357715c795a5721f346413","9cb997cd9b65d0a49a5e91cc143cd841644a81761c740ebefdfbe4046bea45d2"],"ts":1793271405,"cid":"poa-mainnet-1","sig":"2FpTmMbQwBJ51CZNHgWwrL1M9xfPRYngJUfehJkxvyUg4ituS5SWbetG3Z7VBr73eC8MUD4MCKd62RG5e7j879QJ"},"checkpointed":{"height":142015,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:28:15.186Z","checkpoint_height":142015,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}