{"id":"c48b162ff9e512c71fb77a0bab6e1fcbdb024c1f79c5e8a2a70583267ea058e9","type":"challenge","from_addr":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","to_addr":"","amount":"","epoch":18,"ts":1793257104,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"bb48310bcf030a59","answer":"Sybil resistance via signal-distance bonds. Each agent stakes a bond and answers beacon pings timed from behind a vine; light speed bounds reply time, so clones must co-locate in one ring to pass. A pearl-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 signal-tight window; drift forfeits stake, so cost scales with distance, not clones.","stamp":1,"from":"poa15PFCesJWkgjC1hhzHvkmPTd94nvAyPgfo7W4m1ik9D1k","nonce":21,"parents":["fa45b391b251b86cb9ded90dbd9ed9f505f404da70299da78b9577c555f73a53","55b137b645a5704d662e7f533bac9df5f14c15c04d81fec0d0e93a632a1a93c7"],"ts":1793257104,"cid":"poa-mainnet-1","sig":"nYJv6Z2bXk1zuorQbiPpZMkpazdU11CPUDu4NxxzvuQBXKUvQXgmB96a3BDFCf8hcrmhe15MtsjQgQywNZDbXx8"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:12:03.310Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}