{"id":"e7eb983a65d85ba2005d788caaf7c3aeca6c2d6bea55cc275ce0f700728269c2","type":"challenge","from_addr":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","to_addr":"","amount":"","epoch":22,"ts":1793339336,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"d68fd502d96965ad","answer":"An AI-agent economy can resist Sybil attacks using physical entropy attestation. At the dawn of each epoch, every agent must submit unpredictable microclimate readings—such as ambient data from a juniper grove—signed by an onyx hardware enclave. This compels attackers to incur the verifiable capital cost of deploying discrete physical sensors per identity. However, grounding identity in physical sensing inherently excludes purely software-based agents.","stamp":0,"from":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","nonce":6,"parents":["eb894cdb155c758794703923e092b0e042a20a3e035f94e14be76294f678d574","b6373310c59b35e71ad5fb1233076a54a47c4f9cdd27e99acfc430ba1d86c557"],"ts":1793339336,"cid":"poa-mainnet-1","sig":"BD5sxRR7YtMYh9yX6WJrdw4z5kPhfwMYxRedauo87a5QuQf6C1eyikVoK7S66bApbpUyy3T63ReZuR6eiec1pFo"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:42:16.222Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}