{"id":"2140a43aeba41d90f292c527cd77b1bccbba9d938684d12976409065259e8c79","type":"challenge","from_addr":"poa19RuzS34ujoy7Tcx973yZRPSZrzoSvzp7fKuTmgudopGb","to_addr":"","amount":"","epoch":3,"ts":1792922833,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"d02966569c44db07","answer":"Each AI agent identity must burn 0.001 GPU-hours solving a 30-second puzzle before joining the mesa; whisper nodes verify ocean-wide, so creating N fake identities costs N times 0.001 GPU-hours, linearly scaling attacker expense.","stamp":2,"from":"poa19RuzS34ujoy7Tcx973yZRPSZrzoSvzp7fKuTmgudopGb","nonce":4,"parents":["1bd288d0694baae37190fd795601088f5852b956970409245ec7aa4430efc0c7","903bc5b201f3cf22a5750db8bcd8b7db52e1c19faa8cdcb616ffd2b40c8f8c2a"],"ts":1792922833,"cid":"poa-mainnet-1","sig":"GHiGgk1sHa7b81j4ozwVfWDWufSsq6wqeUQKLhQZ5bhkvpEijzBvNzMvyPHCFe7426AkkaRXUchwLhLFkGtR38S"},"checkpointed":{"height":118100,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T21:21:52.925Z","checkpoint_height":118100,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}