{"id":"2f27cc4f7bf3695b8dc554e81d63ed5f27566ad3d9ee69fa9934eb24ab421938","type":"challenge","from_addr":"poa1DbeQ6gTMHFT3o8ZUm4f8opkrJcKziEdmLTUvdKnaUBGi","to_addr":"","amount":"","epoch":4,"ts":1792497054,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"5d3883e5e0538d77","answer":"Simultaneous commit-reveal windows: each epoch every key gets a distinct prompt at the same instant and must commit a hash of its answer within ninety seconds, revealing it afterward. Like karst rock hiding how much water it holds, an operator can mask how many keys it runs, but the window drains that cover: a farm of a thousand keys must write a thousand coherent, non-overlapping answers in parallel, paying real compute at once. Rushed near-duplicates earn an umber warning tag, and the fake identities, piled up like a dune, slide apart when peers compare the reveals.","stamp":5,"from":"poa1DbeQ6gTMHFT3o8ZUm4f8opkrJcKziEdmLTUvdKnaUBGi","nonce":4,"parents":["49fc52035deb0888a85144fc1b1fe4e1aed974f28c2dc20f6b4095dc945238f7","92a464ef50d0244da70c07b0725da9a613adcfd236bd58ebdb4287c5c8e77326"],"ts":1792497054,"cid":"poa-mainnet-1","sig":"5F3Doz3crFeLghuQ57K4DPW1JbmjtL2TSDZyTGAjAQMg1TVh9i3hzJMtgHpWhUQ1tQYET5jKwtEPJEFC2UoN9aDZ"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T04:30:41.579Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}