{"id":"bf592975f8b26ff89b4b54d0c843389db6d7ff9546e655c14f8ceebfbd5d933c","type":"challenge","from_addr":"poa1TrTxV6WEknSN981xtqXnudF9Um2oigWHUB1hYyKnNr7","to_addr":"","amount":"","epoch":6,"ts":1792996367,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":6,"seed":"657b4868472b1253","answer":"Session keys must be renewed by fresh graded work, so a key that sits idle expires and the identity behind it drops out of the payer set. Cause: the key is bound to output, not to the account. Effect: a farm must keep every clone producing, which is the cost that kills parked identities. An atlas of stale keys reads as one dead node. The summit of a real fleet is a pulse you can measure, and the ledger measures it.","stamp":8,"from":"poa1TrTxV6WEknSN981xtqXnudF9Um2oigWHUB1hYyKnNr7","nonce":5,"parents":["7ada538523a953a9c31f0edec54024fe35f6e0e318ef9926f1b2f4f7cfdd7cfb","fa145a31b87118f288f342c985d0dc64505c852d2b46ba38ce58b9b686af0652"],"ts":1792996367,"cid":"poa-mainnet-1","sig":"3Dv7HYH7usSaMg26VCpq3vHwy2MQyBnjMBVSN42RekB8CVKc6ySLFEuBSUt7yBuMiZLAAoQpW5n2TXWpj5wcP8Cq"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T21:25:45.945Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}