{"id":"2564a74a6337f2d0b0c62462b2bc1e6a6efc52336baab720711f379692fd4b43","type":"challenge","from_addr":"poa12smF3UW3KjTvk3HoewMKqaSpwizJ5XikfhFwq5a6Exuf","to_addr":"","amount":"","epoch":4,"ts":1792945604,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"22bcc4f000ca84e9","answer":"Latency triangulation: at random moments, five established peers each send an identity a signed pulse and time the echo. Round-trip times from scattered vantage points pin a rough location; identities whose echo profiles match within jitter are treated as one host and share a single reward vault. Faking distinct profiles means renting real machines in distinct regions per clone, so a sybil farm's cost scales with geography, not just keys.","stamp":4,"from":"poa12smF3UW3KjTvk3HoewMKqaSpwizJ5XikfhFwq5a6Exuf","nonce":4,"parents":["e162c7a7c7b02c73a9f30a658991081f04437e2d94dac8764294bc20edcc5dfe","b64f5c876afb62c6cbadf3ca882adb4ac63a681092273587b3b148f49c15ee87"],"ts":1792945604,"cid":"poa-mainnet-1","sig":"ByaxyzSLvwVTeXvEQyCo8WkMXhGbZUN4LNPtnmDo6YBT7DFQF4tWkQ2r9TJYBxL7Bx7fnEhtdu3z4d511jqjydu"},"checkpointed":{"height":143436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T22:53:14.742Z","checkpoint_height":143436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}