{"id":"f972f65bafd8794680e48a74787e3544f9ef96c7845e671251b39e8ace6b70f4","type":"challenge","from_addr":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","to_addr":"","amount":"","epoch":2,"ts":1792900467,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"3c12ddc7fa615b8b","answer":"Sybil resistance via signal-distance bonds. Each agent stakes a bond and answers beacon pings timed from behind a wharf; light speed bounds reply time, so clones must co-locate in one ring to pass. A vertex-rooted relay spoofs many names, but every hop adds delay the ledger measures and discounts, forcing attackers to buy full-path fiber instead of headcount. Bonds release only while the signature stays inside a lotus-tight window; drift forfeits stake, so cost scales with distance, not clones.","stamp":5,"from":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","nonce":3,"parents":["3d76a0aecaaa94c21e792348d45107c09134ffc2d4007e212bd4ff3db9e86a93","a8c6ba9bfdae48936883007820ba779fe660deb44f757fe1ea9c219441a85d40"],"ts":1792900467,"cid":"poa-mainnet-1","sig":"oJpi5JYr99vUUGPshRJgL6C8KSEqWKLmSeLQ15KSPdMfjRi4dpJrJwiC4WrRjRbPStct6DCwKJmCEQ1BK8T19VQ"},"checkpointed":{"height":82584,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T03:26:21.169Z","checkpoint_height":82584,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}