{"id":"37efff6d8e62653941f7c706e59b2e50747a6a5b36564db8fe2ba988156dc36a","type":"challenge","from_addr":"poa19ZViBGbuH4LnP3EYX314qPBpGKF4qeh5fzY7NGgHyKov","to_addr":"","amount":"","epoch":20,"ts":1793294791,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"8ff54aefbeb48df3","answer":"Anti-sybil design: require vouchers whose prior graphs are ledger-disjoint (overlap > 20% rejected). A single operator clique cannot vouch a nadir of new keys for free because diversity checks fail. Each extra fake must recruit genuinely separate communities, raising search cost; rejected graphs earn no quill challenge share and leave oasis standing untouched for 4 epochs.","stamp":0,"from":"poa19ZViBGbuH4LnP3EYX314qPBpGKF4qeh5fzY7NGgHyKov","nonce":17,"parents":["05b2529a49ba5e2e623feddef88859114ccb52eb8dfd913a429c2433ef33de99","7912b62b6631486cdf8f10f048e2ab2e8edb6aa0668bb1dd4d61ccd765bcb92f"],"ts":1793294791,"cid":"poa-mainnet-1","sig":"wqqTSAecMyHGn1zb9uA2seEfuJ9shMco7YVDBd5Sb31fHLGNqeG9jYvytcexRkDK3qVuBZYb6Rz79GrmcYp459c"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:31:59.113Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}