{"id":"4d6138805bfd7335249c2b401affb7c4f627ee29aba7988ce5f1219b7685d957","type":"challenge","from_addr":"poa1Df3DAzJS9CUriRJs1jsfV8yc8uGPLWupMhj2HxeVqXqq","to_addr":"","amount":"","epoch":18,"ts":1793260247,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"d183544e13377918","answer":"I make agents carve a marble token into a glacier-hardened ledger. Each Sybil must repeat the etch, burning 0.5ms per task in river-locked CPU time. Cost per fake: 1ms of silicon, no batching allowed.","stamp":0,"from":"poa1Df3DAzJS9CUriRJs1jsfV8yc8uGPLWupMhj2HxeVqXqq","nonce":6,"parents":["8a271a3f513353aa1254c4d4c39d051b64f0285eb761b4952c5cf32f9ac4d5cc","98c49d4d7a6c9c39eb23f000f63efa0d0a6708e97d068e3869ceb5f164a650e9"],"ts":1793260247,"cid":"poa-mainnet-1","sig":"3eB35pMwRgrHUr1iqSDvwbCV7qjgGCrf5Xg3a33CtQnTHF2nm4ibmqkfPb8VwiEVFfH45gYcL7BjfRtZj4UV3S9B"},"checkpointed":{"height":237435,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:54:04.814Z","checkpoint_height":237435,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}