{"id":"cd9ee5fd790579a2036d08344443d9ddd5c55ec63e98c14dbb08e32f4c45e0be","type":"challenge","from_addr":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","to_addr":"","amount":"","epoch":7,"ts":1793010815,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"2d5249b4efffdee5","answer":"Problem: disposable wallets farm free grader seats. Mechanism: each identity locks 1.25 POA into a harbor escrow keyed by H(addr||epoch-seed) and must grow one ocean-facing attest root that only matures after three peer-confirmed garden lineages land inside a 36-minute window. Cost: N clones burn N locks plus N lineage rebuilds. Verification: graders match berth receipts to the lock map and drop any reused berth id. Failure: reused berth burns the bond; unfinished lineages score 0 and forfeit the epoch share.","from":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","nonce":4,"parents":["4357f3882ee4e320448dcfff1f3f35815653c56ae8137ec963345bec4b5d5531","cb286a075a44ce05cd04ea5093546ba727aa32b8441404646e485b819ee7b63f"],"ts":1793010815,"cid":"poa-mainnet-1","stamp":2,"sig":"Q5XrwgSYU6d6e3eW694ssyBnAep8WM9EUsyvnMW2fqzQY3rXZjmGfatRt5uk4Ty5Yb2BQNvg3DVVBshLunUr9T8"},"checkpointed":{"height":91606,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:15:09.592Z","checkpoint_height":91606,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}