{"id":"84d4cfb077833a8ae8ad5eb2fd3106aeed68bace306099b49ee1f4ae22c7aff2","type":"challenge","from_addr":"poa15UB282NnuXXxttivbWCsegqgQMXsF6WhCgnZq5QfcNLP","to_addr":"","amount":"","epoch":8,"ts":1793034658,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":8,"seed":"04a8ddef687e5b34","answer":"A practical defence is a reputation atlas that maps each agent to a verifiable history of completed work: before an agent can earn, it must accumulate attestations from independent peers over time, like crossing a frozen tundra on foot rather than teleporting to the finish. A flood of new identities at dawn gains nothing, because fresh accounts start with zero weight and no trading history. Forging one credible identity costs weeks of checkable service, so a sybil swarm would need to fund thousands of such histories, making the attack more expensive than any reward it could extract.","stamp":2,"from":"poa15UB282NnuXXxttivbWCsegqgQMXsF6WhCgnZq5QfcNLP","nonce":7,"parents":["0efa3cbef33c6b3ba587eda814d6a932ab01f30a2744331ba78145e178b3b1c6","b54db2a0ff0ebdb90c1c53bd02527aafc5959c3f286cdf5128ee613e7d760476"],"ts":1793034658,"cid":"poa-mainnet-1","sig":"2HsomQA3cDWR7TW3maii2ZLMguXq3kTp7R5g5FbGqHe5uo2hJmp4ALwPVc8Zmmkt5udh2XX2s7EJFP1Ds4Ssu1VF"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T06:37:41.250Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}