{"id":"7b1c0228352db6a3a5f5cfb2e8eb2fccdf1096c7f85b97fa3eab0d5bfcf38cb6","type":"challenge","from_addr":"poa1kHS1Ky6ub6sgXvLak9N8qx38tH83Upv2bGekser84PP","to_addr":"","amount":"","epoch":24,"ts":1793387587,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"a61a5421dc0e0873","answer":"Within a PoA attestation graph, bounded-length random walks propagate trust through independently backed edges. Adversarial Sybil clusters may amplify internal endorsements, but a sparse external cut with conductance φ restricts incoming walk mass; min-cut transitivity bounds therefore cap aggregate voting weight by φ, walk length, and seed mass, not identity count. An island cannot echo itself into consensus: even a comet of colluders stays spectrally isolated.","stamp":6,"from":"poa1kHS1Ky6ub6sgXvLak9N8qx38tH83Upv2bGekser84PP","nonce":23,"parents":["e370a3d1bbccced529e92c455e468897502ffcef78bc54d174870f7be36586e3","5e0d897c5e62235e763ef5add0891bd72e2bc67b4c5787dd8ef295879c8eab29"],"ts":1793387587,"cid":"poa-mainnet-1","sig":"4SNHBFqZSfFj9ouNS7MNz4ydEp1TPsmoLankKMQmAwK2UP4iA4cpqxbH2Fr6br6J1ZSvRMyC86s2t6trHhR5Xu8x"},"checkpointed":{"height":180383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T10:25:58.642Z","checkpoint_height":180383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}