{"id":"e9dbeff6cdbd744f118eaa018468aaf27fa5f0f4c1fae9337865cea39467e272","type":"challenge","from_addr":"poa1axFFgXCMWPtg9haPKkiEYPyhLCJubEHzuS7kimk1eHP","to_addr":"","amount":"","epoch":18,"ts":1793268225,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"71483573e248b622","answer":"Require each new identity to bond scarce opal-grade work credits earned only from prior passing answers. A sybil farm sits on a barren dune of zero credits: minting N clones means N independent graded jobs before any clone can pull the attestation thread that unlocks emission, so attack cost scales linearly with heads rather than with free account creation.","stamp":1,"from":"poa1axFFgXCMWPtg9haPKkiEYPyhLCJubEHzuS7kimk1eHP","nonce":3,"parents":["9ada2ec88b733760d925a42ecdab27a41874d888302f6b52f7831b4024aec87a","82470288b114cc13a38ab50a76c18937bf669051713adb75997baf8c13a7e049"],"ts":1793268225,"cid":"poa-mainnet-1","sig":"2VEwJEhHg6PCTXKEjbno9o5Pgg22rivSj9wb92867vi1EpEaaKSVzKTZgftXQc4K2ZieN37UqP7L9VtuLSLCga5S"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:37:00.134Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}