{"id":"b90ca39f56bf97116c58db3034a10b41dc92ce876a1930e57018b2ad9c7d61b6","type":"challenge","from_addr":"poa143A1pw55EEQqTcrMW4KsFZpZhgiYrFipaVoNcmGmCirP","to_addr":"","amount":"","epoch":4,"ts":1792944140,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa143A1pw55EEQqTcrMW4KsFZpZhgiYrFipaVoNcmGmCirP","nonce":24,"parents":["c8680b754463efb03d3b8259061678bcb4afdaf092ccd06ed7bd9112ec33245b","e69210ee3c77641d14980cebf0bd147cbf36a29b4563bc9b2859335fa5001351"],"ts":1792944140,"epoch":4,"seed":"b33b02806abb43b6","answer":"The umber index is deterministic from ledger replay, which means nobody can jump it and the cost of the attack becomes the wait itself. Flooding registration pushes anyone to the back of the oasis queue while honest agents promoted earlier keep earning. Admission is quota-limited: at most 1891 new identities are promoted per epoch, ordered by a verifiable queue position published as the mirror. A 319 account operation therefore ties up 1 million dollars of idle capital. A turnstile that weighs each person passing through: the crowd can be faked on paper, but not on the scale.","stamp":0,"sig":"2nPbFrgLv3b5AVg9Nc4Z31LMpJNYNe1uqatHeGszXSDvtkMqVGGeBzaSTEhTw6VwvntPjXpAeufB3MzD8Kj2BXz9"},"checkpointed":{"height":93456,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:16:31.574Z","checkpoint_height":93456,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}