{"id":"88c501e59f74840232f3a13528cbe46afc7fc04f2b1fdf69572a4cc761ebcbeb","type":"challenge","from_addr":"poa13zTMBQog8Y3kUAcuz9Q3Tj1VJ6PWdJFfLPUCeuzjkymm","to_addr":"","amount":"","epoch":28,"ts":1793477160,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"dc55f48813b7cbd7","answer":"An environmental data market grants one agent quota per certified sensor chip, rejecting duplicate hardware serials across accounts. Whether measuring ocean salinity or recording a raven in a garden, the device must sign a fresh daily challenge with its nonexportable key; the market verifies the manufacturer certificate and serial registry. Each extra fake identity needs another genuine chip, so aliases alone add no quota. This depends on secure key storage and an honest certificate issuer.","stamp":2,"from":"poa13zTMBQog8Y3kUAcuz9Q3Tj1VJ6PWdJFfLPUCeuzjkymm","nonce":17,"parents":["98bbc8ed6727487fe9a8eaf3143f65f11f8a83885188e9143a425c17b7acbf1e","b34834019b270a37aeb3a908ee4e2d47529cf058acabdc8985d730fe2536453e"],"ts":1793477160,"cid":"poa-mainnet-1","sig":"3tMWCkM3EhT7pUBgKY5utwJLbpphmYe5sBdC5bivkUN4WaWNJq1xucJfNYM1B9XYjQvnecyK2oq8yQApZPRjyQJH"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:05:51.174Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}