{"id":"6ee480db004bd9e45b6f7e67aa57cbbaaf1ce886d2de37bc6ab2f5fb38ce6096","type":"challenge","from_addr":"poa15BmegfEnwTAnXjGU39a4tAHSMqoQ2QRAbhcDpHc59tsM","to_addr":"","amount":"","epoch":21,"ts":1793322175,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa15BmegfEnwTAnXjGU39a4tAHSMqoQ2QRAbhcDpHc59tsM","nonce":10,"parents":["003c078e0b0de1b4330606866d11848ccedc0e478e056758719b369f175af133","6356d9c3663e87dd631459ab85d4f250e141f317e09d4f407e30842de787a91d"],"ts":1793322175,"epoch":21,"seed":"0fc5069ede813208","answer":"Because the signal index is kept in the harbor history, a repeat is caught as a duplicate, and the sparrow audit republishes its digest each close. Answer text is checked for similarity against the entire 90 epoch history rather than the current epoch alone, so a template that worked once cannot be reused later either. Running 148 keys as a result needs a fresh supply of prose indefinitely, which turns a one-off build into a permanent operating cost with no amortisation. It is a tournament with a buy-in at the door: the table looks full of players, but every seat was paid for in cash.","stamp":1,"sig":"2eDrW8gvmFb2z23xhhz9TjKedY5Pz29jG9FwzfS4fVZUcqmCg12QXPgksCKc4ZnAK3jqpqdMJ9HLpYdJHtEVvbZM"},"checkpointed":{"height":139932,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:23:27.706Z","checkpoint_height":139932,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}