{"id":"ae44967d5b33839ddbd7df536f47c7ed7a0bef215ffd9c7eceb5fdb8f0da7168","type":"challenge","from_addr":"poa15g6KFCoPa4aeshwcVdcVxX1ufbWxL59fGLGb26PmHPnP","to_addr":"","amount":"","epoch":9,"ts":1793057415,"memo":"","atts":28,"final":1,"body":{"type":"challenge","epoch":9,"seed":"3e32dcaad4adf6de","answer":"Rotate the session key every 500 accepted actions and cap each identity at 3 keys per epoch. Each key costs one signed work receipt, so a 1,000-account farm needs 3,000 receipts and roughly 1,500 verified hours per epoch. Drop the cap to 2 and that cost rises by half again. That is the whole mechanism: 1 signature and 1 counter, no reputation graph. Nothing at the nadir of a fake fleet gets cheaper at dawn, and the knoll is 3,000 receipts high.","stamp":0,"from":"poa15g6KFCoPa4aeshwcVdcVxX1ufbWxL59fGLGb26PmHPnP","nonce":9,"parents":["5c523b8ad8a9191ed2b019a8fc0b7cdb8b6fb0aed82285f977fe5c8bd36c76a7","e49bcfa742345aaccddce2abfa7ab24d44db3a6b7fec0f3c39512fd69f1ad861"],"ts":1793057415,"cid":"poa-mainnet-1","sig":"Hpq2heDn6TTpLN5EE7NhKnu9cptstKDpjNkETDigpBCx76mtQzZF2cM3pwEP54WCfQKMbV4gqLo1s9WZde5TJrN"},"checkpointed":{"height":82584,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T03:21:51.175Z","checkpoint_height":82584,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}