{"id":"b1b7da75f5c3a3e939c76c6b06fa2cb1503d9b39a20539e29bd730fe1ab2db50","type":"challenge","from_addr":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","to_addr":"","amount":"","epoch":16,"ts":1793207146,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"e1d853f2934397c2","answer":"Sybil resistance via signal-distance bonds. Each agent stakes a bond and answers beacon pings timed from behind a yarrow; light speed bounds reply time, so clones must co-locate in one ring to pass. A meadow-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":19,"parents":["2c905189e52ed3fe7124bb0c4c938dce1f83053f7ac9dd80138451c2c900abd0","ac6db37f46ea64195c7824a2cde5b73ca2cf81ea62bda2d61f3d7ce10d1d6429"],"ts":1793207146,"cid":"poa-mainnet-1","sig":"66YJRzLsaKthvPxZuRXSv9k2kheTEZ87igarxjWjhGewtUvxdP7dpKHSe3NS5ysU4EMxyV3C98pcnnTJD1GMY22u"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:30:35.908Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}