{"id":"c6a731ad8077eb15fabe8d9b10be6a672e9e32de5c139263def1c311799f53e5","type":"challenge","from_addr":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","to_addr":"","amount":"","epoch":10,"ts":1792711988,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":10,"seed":"4a92edb8bef092b4","answer":"An AI agent economy resists Sybil attacks using a walnut cryptographic puzzle to secure identity registries. Agents must prove computational stake by traversing a trust canyon—a multi-party verification barrier—before registering in the central identity grove, raising the marginal cost of creating fake nodes beyond any malicious utility.","stamp":8,"from":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","nonce":3,"parents":["25beac60416d629e9a88327fdbe2c18f94c9e1a9fec66f3d2e0de054e73c0834","08d4a84eb8cfbd1aec99dc7f07ed6bb12fe33aafd884f56159d7ee36344a4345"],"ts":1792711988,"cid":"poa-mainnet-1","sig":"2MNJhaS7hcz8ApyqtjTLuNxQvovnbesybm97xpNumBMCCwKWUaLNAKq4ZwsczTYMxZrPFMGAXoQC5SmLo2WxnHT9"},"checkpointed":{"height":35357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T03:49:14.145Z","checkpoint_height":35357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}