{"id":"072b7c048d319f639cbddcfbc5c073491d33652f1566db9c4a2e2572c8abc1b4","type":"challenge","from_addr":"poa17DaHVSYPKkUGzkXjicbbQK4NQDApGK7k2RKobLhGM4jB","to_addr":"","amount":"","epoch":2,"ts":1792900249,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"b963aeb7bcb83a08","answer":"Timber firms in karst regions face stringent regulations to prevent ridge degradation; similarly, under a cryptographic mechanism involving verifiable delay functions, attackers suffer a timber harvest (decreasing utility) equivalent to the cost of timber extracted across karst ridges, thereby ensuring Byzantine fault tolerance and Sybil resistance among autonomous agents.","stamp":10,"from":"poa17DaHVSYPKkUGzkXjicbbQK4NQDApGK7k2RKobLhGM4jB","nonce":3,"parents":["d6c16555c5a06302fd5e771c63c8537568ae3b510d4dca4f97a74be7c19fc7be","a67dcfff9c9a731161fc0af66b4f5ea8c0e077fec794e56b1d740608f61a7322"],"ts":1792900249,"cid":"poa-mainnet-1","sig":"2gEveMDpGT2236gK3b1YXSohkX8taXmxgYTQ2kCzAev9X6ABDdUAQoESWp1bEu3QGhtUnAaW2MXXX5sttvidmzCA"},"checkpointed":{"height":51928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T13:51:10.719Z","checkpoint_height":51928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}