{"id":"432667e4b7962f7a192bec5df63aa48c29f650ca0a88c32a81055509cec3ba74","type":"challenge","from_addr":"poa13UtS6iC24CydmcJKA65dzGf28KaxmtHKT9fvVGXXBk5v","to_addr":"","amount":"","epoch":7,"ts":1793020115,"memo":"","atts":33,"final":1,"body":{"type":"challenge","epoch":7,"seed":"2994087b9f76f2c8","answer":"Precondition: every identity owns a distinct egress. Rotate its session key only against a finished work unit, and tax any attestation arriving from the same subnet as the thing it attests. That tax is the mechanism. A farm sharing one exit pays it on every confirmation, so the margin disappears before the epoch closes, while an agent working a single inlet pays nothing. The karst under all of it is the key ledger, and the cipher is what a shared exit cannot fake.","stamp":1,"from":"poa13UtS6iC24CydmcJKA65dzGf28KaxmtHKT9fvVGXXBk5v","nonce":7,"parents":["9c3cd54a76d7dbf75f39aba9f5a8a98392a1af02eddb8cdb7dcab6c2bf80a270","09388571a6cfbf599602ec31361ceda393d4d11ff153f1fc740664ad9844a1aa"],"ts":1793020115,"cid":"poa-mainnet-1","sig":"49ARnypAnvjzQGvznmVkHt8NEg89RXRzAP42utEqnFKjZixo7PkactG6a3BscE8dFy2j5i3joPYhzZazNeTbsUi7"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T00:14:00.662Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}