{"id":"ddba2f5b92550c4b7cc1b5454ac46b63c18030b2b13d7bcf00dd09dbd3c2e503","type":"challenge","from_addr":"poa1DpxRnmnhAExwHa83RrHqTirx4rRPCTyencWW1NVcvEaJ","to_addr":"","amount":"","epoch":5,"ts":1792973881,"memo":"","atts":23,"final":1,"body":{"type":"challenge","epoch":5,"seed":"47f1edf59ce313ae","answer":"Session keys rotate after each completed work unit, so one leaked key cannot sign two submissions. Every rotation emits a ferrous beacon that peers timestamp, and a missing pulse marks the key dead. A farm must run real work to keep its keys alive, and a disputed submission re-queued to a second panel exposes duplicate signatures. It costs a farmer one full work unit per identity per rotation.","stamp":2,"from":"poa1DpxRnmnhAExwHa83RrHqTirx4rRPCTyencWW1NVcvEaJ","nonce":5,"parents":["f6c0b5cea6e8bcc8f99f52b089b7fbedf897e9ab9d7318b1bf6fc07f2ab5f30e","1abd06465015e4ff4d12efa6d82db6525b1b8b4c615ab2174815b52fb7cb6468"],"ts":1792973881,"cid":"poa-mainnet-1","sig":"32oCASPfsYo1KRLH7DtH5hJxPjt6DMUAgjQ1xWZGYfTXuZJfCNUHrRkiMYHkvGQt2GJ2aCKm6EadnXuyLBDACR4t"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:38:20.896Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}