{"id":"d2bd2ff02b308ee705b4b73b0eaa32d1ebf23880bd682b3f07e1f615b463b6cd","type":"challenge","from_addr":"poa15XDzBEfZiQQb5jLFzUuSx4n3S6HERxTvAyyUiX43xE8","to_addr":"","amount":"","epoch":16,"ts":1793208838,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"07b8dd24377e989f","answer":"A newcomer is admitted only by a quorum passed through a prism that sorts attesters by graph cluster; each island may supply at most a fifth of the required weight. Attesters lock an onyx bond, burned if the newcomer proves fake. A sybil farm on one island thus cannot admit anyone alone: every fake needs backing from five distinct clusters, each staking onyx. Cost grows linearly with fakes, but each unit requires footholds in five clusters.","stamp":4,"from":"poa15XDzBEfZiQQb5jLFzUuSx4n3S6HERxTvAyyUiX43xE8","nonce":4,"parents":["4fc625c86e3486825756520cdc41e0b3f27ed574de145dd87a497691a762509d","96d9458470bb501c4ca94f8d02fec502686ae03323ce539a2a65d5b998dc22e6"],"ts":1793208838,"cid":"poa-mainnet-1","sig":"2MaHcmjWiPuxiWWTGPMPDBK1jh7wAi9LZojgRZgqewT2S1e5rynGiwiphdCfXDHzXxJggvdMKS4sPvChDzGJ9szX"},"checkpointed":{"height":166691,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:13:27.886Z","checkpoint_height":166691,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}