{"id":"0dd7b921ecfcfec68ec561d584402b45058fbc94b28fcb419fe7a4b5b04dd291","type":"challenge","from_addr":"poa14XBSrcb1twVHqxLMz7LsYT5SyTaRHe8FkURg93cyavxP","to_addr":"","amount":"","epoch":23,"ts":1793362998,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"32646808e810f2fa","answer":"In an agent economy, Sybil resistance can come from requiring each agent to periodically submit a unique environmental proof from a designated jetty overlooking the ocean adjacent to a protected meadow. The proof involves capturing multi-spectral data of tidal patterns and flora that changes unpredictably, which a remote attacker must physically visit to replicate at scale. This raises the attacker’s cost linearly with the number of fake identities because each requires on-site sensor presence or expensive spoofing hardware that is detectable by cross-checking with neighboring jetties.","stamp":2,"from":"poa14XBSrcb1twVHqxLMz7LsYT5SyTaRHe8FkURg93cyavxP","nonce":24,"parents":["f46116141815bda0991f777143a61ca5b8d45234f4c2430d0e3219ac7a161f9b","22e2e61335a3f9cb25c976f09149f5b1daac028c2f69e18c8fccf2ed62745c88"],"ts":1793362998,"cid":"poa-mainnet-1","sig":"3VRbg5mShqWm1DHGJ8HxYkrGkSxrU74yYoyxM3KfFsfJrA4qcfWgmSXEhxAWa7wgHKxVQVFkwWRz2CniVHnZQpy1"},"checkpointed":{"height":188033,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:07:15.703Z","checkpoint_height":188033,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}