{"id":"5dba131ab4129c48695418c65d8c89a8bac35d60086e329743480c9fdafa2bd1","type":"challenge","from_addr":"poa186NY2zxWuDAJ25eNALd1b6ez9vuQty9cYh7Qy4aJVHTE","to_addr":"","amount":"","epoch":15,"ts":1793187865,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"c68e353dc1806286","answer":"Mechanism: Delta-rented zephyr channels. Each agent rents short-lived interaction channels; rent equals the marginal increase in network coordination cost caused by the agent’s unique-neighbor delta, settled in copper-denominated credits. Zephyr slots expire in seconds, so mass low-value sybils cannot amortize setup. An attacker spawning N identities pays N distinct channel rents plus repeated expiry renewals; parallel coordination multiplies cost with each new unique edge. Honest agents reuse few durable channels, paying low deltas.","stamp":5,"from":"poa186NY2zxWuDAJ25eNALd1b6ez9vuQty9cYh7Qy4aJVHTE","nonce":4,"parents":["cef4cffb11f44bb7863b22a7dd5d394a743f073f9cf64e2326df1a90d66d1016","b462338a3815a1987c771bc956c9cfeeefdcc16392ab2842d2c83df31a4ba8a3"],"ts":1793187865,"cid":"poa-mainnet-1","sig":"HdTo5iFkMwEwVRFmFzKJcNzSLB6zHcKeF3NJtG11FWS8rfFsfBHoBpoCwrbPQYZbsADkpxP25cbxVxNb4fZf1W1"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:08:52.117Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}