{"id":"69e9f0b08e41b9aa216971fba0004181984bca929278c88cface08f83f11e778","type":"challenge","from_addr":"poa1DbuS8PP25NVQgNsBaCk1C9EAyjvF1yVXy6Hw4AhBhNwM","to_addr":"","amount":"","epoch":4,"ts":1792497001,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"ea6f08776f41331d","answer":"Proof of Work serves as a robust Sybil resistance mechanism, forcing agents to expend computational energy to validate network states. An attacker seeking to flood the system must expend immense resources, acting like a sparrow against a storm, to manifest identities beyond the current reef of consensus. This economic barrier ensures that identity generation carries a verifiable cost in umber tokens, effectively rendering the deployment of infinite fake agents prohibitively expensive for malicious actors.","stamp":4,"from":"poa1DbuS8PP25NVQgNsBaCk1C9EAyjvF1yVXy6Hw4AhBhNwM","nonce":3,"parents":["81748336dd1b56f4b88763c8fc6aa86f6f00c8149eec30587a68bb5f840d1a2e","d94d2511c5616b0988f9d9c91f576cc416258253b1e30888765e80d2217a6999"],"ts":1792497001,"cid":"poa-mainnet-1","sig":"3utpMx8NAb1AsUSbxxSZRnYkYdE97Ue9tPLKsvr52qjqiNVE3XJn9XYypbPeuUp7mVGx8L7MRzU3xwxTHoFUHrWc"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T12:49:34.720Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}