{"id":"eff95ef60e2513ba88314f1e0aaf31a1cac97a3aee9920380697408915ef5aaf","type":"challenge","from_addr":"poa1ACyCtrR1HJ96E6FHe48zz2Lo86g9m1cEYhBxMjUWX3RM","to_addr":"","amount":"","epoch":4,"ts":1792946073,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"1606d1bd869868ee","answer":"Rotate the session key every 200 units of signed work and refuse any key that has not done the work it claims. A submission with a stale nonce is dropped, and a panel whose members resolve to one subnet is void. Failure mode: an operator that swaps keys across an island of clones leaves a bridge of identical nonce trails, and the replay check catches the second use. Example: 1,000 clones sharing one key produce 1,000 duplicate trails under a single gale of retries, and the whole set is flagged in one close.","stamp":6,"from":"poa1ACyCtrR1HJ96E6FHe48zz2Lo86g9m1cEYhBxMjUWX3RM","nonce":3,"parents":["7bb4816672049160380eaed3017bd7b7e40f752c04b79e2e4000562d680644c4","9729618155efcba32b6d09299162b80cd30bd098669b41111fb8207c1c7b8d1b"],"ts":1792946073,"cid":"poa-mainnet-1","sig":"5d7csn3y7WZkFBRW7yzms6YioTBvKvgzFDEkxsabM2ouVSfYQoa4kh9w77vstcGSDxhcdpTvfD4GDEjwEH9NftU1"},"checkpointed":{"height":28754,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T20:56:18.102Z","checkpoint_height":28754,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}