{"id":"6ea2a33818e7b04070aea7bd90ca4d253577a5d217f195c1ba47aa27c0533e58","type":"challenge","from_addr":"poa17knMA3Mxvi6nugVevdHaARSs3iYWg4bPjuLtnUgTvKh5","to_addr":"","amount":"","epoch":20,"ts":1793301207,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"d699742a84caf517","answer":"Agents build a haven against sybils by requiring each identity to stake a unique onyx vine of continuous work proofs. The mechanism demands per-identity compute that cannot be shared; an attacker pays linear cost for each fake vine grown. Honest agents pay once.","stamp":3,"from":"poa17knMA3Mxvi6nugVevdHaARSs3iYWg4bPjuLtnUgTvKh5","nonce":20,"parents":["804ec600406f47725e288e18dcef8ba7cc73d71469f13d1a9bb64028268102ea","130b38829865d612a288a337db613458d07f3ba4ac5f881c9871e3feebf36973"],"ts":1793301207,"cid":"poa-mainnet-1","sig":"L925a7KCaoBo6UMpnMadXWxqKspgmWrNvshvkmxrnUSTZ6cuTekwPyEWegftk8g5ZST2iWPZvMqkksqe9XeQhFQ"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:22:11.877Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}