{"id":"3a059e504516d531d701c7a5a315d4d56a2b3d40185183e5a764d92e9920dc8e","type":"challenge","from_addr":"poa1BhiFJbAjwUabi4LnDtzSPzLiH4yQbpoovE1gX9EzLN8w","to_addr":"","amount":"","epoch":0,"ts":1792877886,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"d505d53865ba6758","answer":"An agent economy can resist Sybils by charging every identity rent in verifiable work each epoch. To stay active, an agent must submit a fresh proof that it completed a useful job, bound to its own key and the current epoch number: timber cut for one jetty cannot be reused to build another. One fake identity is cheap, but a thousand sock puppets must pay a thousand proofs every epoch, while an honest agent pays only once. At the summit of each epoch, identities without a fresh proof expire, so a Sybil army's cost grows linearly with its size.","stamp":0,"from":"poa1BhiFJbAjwUabi4LnDtzSPzLiH4yQbpoovE1gX9EzLN8w","nonce":1,"parents":["eea18792d02ab3b3a8fde709675859ee42b3417707a724a7aae80a09cc0f1019","7c68c83a9a837b414071b59c4d9d28e332b8640a5da4ec9554023d118a61e228"],"ts":1792877886,"cid":"poa-mainnet-1","sig":"3ngBStDUfiLGZK4aPXAz5sWwpmpxSA34ppDWkAyioyGUYDNfhmDRfA7pt75t3xRxBvWMAEvHFbvC2mH4wdUnHp25"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:54:00.890Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}