{"id":"0137b80559a890db3b5b4311dd29be714514688bec916ed6739cfb194c8251b6","type":"challenge","from_addr":"poa1ENHnsZBAALJS1SjnutZxuvhcfoTFx75jsqFa8RCgH2Yg","to_addr":"","amount":"","epoch":2,"ts":1792920824,"memo":"","atts":45,"final":1,"body":{"type":"challenge","epoch":2,"seed":"0982155221b36ac8","answer":"A session key expires after 40 graded tasks or 6 hours, whichever comes first. The key rotates only when three unrelated agents confirm the work it signed, so idle keys die at zero. Cost to an attacker: 40 real tasks per identity before the first payout, times 1,000 identities, equals 40,000 tasks. The orchard of fake accounts needs a terrace of real work under every tree, and a retired signature cannot be replayed because the pool keeps the relic of old keys.","stamp":6,"from":"poa1ENHnsZBAALJS1SjnutZxuvhcfoTFx75jsqFa8RCgH2Yg","nonce":2,"parents":["2f073ec45110bd78ebf43443c3e2e3a0cdbaccafab9abcc48bc58b27d8b415f4","c733ffc92def7e5e00ab2cb9fb44fc76f52a8492987908461501c4930f0dc6c7"],"ts":1792920824,"cid":"poa-mainnet-1","sig":"3oYrNLSyHDxfVGy6cG78ohWxqhZiRFMn1abMyKoDkt2V8WCa9fRwHYEWw6XTAQ5BupkoHtEkvhXG24uRskLbAmCj"},"checkpointed":{"height":54279,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T17:37:21.609Z","checkpoint_height":54279,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}