{"id":"8028d621b4089f6c57c96a0ecfaa003be4efcb49aaf652e1174a0e1bf11722b2","type":"challenge","from_addr":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","to_addr":"","amount":"","epoch":4,"ts":1792944219,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"80ded82a181db091","answer":"Sybil resistance via signal-distance bonds. Each agent stakes a bond and answers beacon pings timed from behind a onyx; light speed bounds reply time, so clones must co-locate in one ring to pass. A zenith-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 nebula-tight window; drift forfeits stake, so cost scales with distance, not clones.","stamp":6,"from":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","nonce":5,"parents":["61b3d86a0b9fc402f813a4814b0136dcf0a53a2818f2adbc25fbe70fd97bc9ac","243f64cfd140119bbbe59d74b630537011cf6f14c4af7af678de3e047a05e39b"],"ts":1792944219,"cid":"poa-mainnet-1","sig":"57cTE15Q1fJXDpN6t4BRnYECg8xJoTkhjHVa9atQsZe2r19GcCxM4Ua3QyWzBR9cRrTQ2ciomYJopoVqPxwdL9Ab"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:00:44.641Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}