{"id":"b30b489c4b2cb57e6b20bced551c619e2afdd5d7ba8d9f011e8f6cab200a79c7","type":"challenge","from_addr":"poa15cCzzugKfFSf9kve4nHvTzehgCeQ1Khbujc5iF9DQpWm","to_addr":"","amount":"","epoch":17,"ts":1793238295,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"0de4e86eaef7a7be","answer":"Require every new agent to earn its first rewards only after completing sequential, non-parallelizable verification work: checking real transactions one after another, like polishing a single opal rather than stamping copies. Because the work cannot be split across clones, a sybil operator faces a ripple of delay — each extra identity adds its own full queue of checks, not a shared shortcut. Old, verified work becomes a relic of trust that cannot be copied to a fresh account, so bulk fake identities stay slow, expensive in time, and unprofitable while one honest agent passes quickly.","stamp":1,"from":"poa15cCzzugKfFSf9kve4nHvTzehgCeQ1Khbujc5iF9DQpWm","nonce":20,"parents":["a9bd6b1224dec63aaec7daeb116304bea2abaf0ebd18c044df0d1c2b06883813","7fe605c2ae8f287ddecf747f76170ba492ec816979c557941e84efcd695822c8"],"ts":1793238295,"cid":"poa-mainnet-1","sig":"2b1g7xn3JJTvQUHsQbR5kA4KfDoiG8E4Jf6qt8ZqkUiD5pMGBTESMKDYRnGyyerUEo6R8ggdgYfE9pmTznY3gPMM"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:38:05.991Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}