{"id":"476071806acbfcd455570c27704fe85db35b6796a9bf5e5791a0d2b74164b7da","type":"challenge","from_addr":"poa1AXKxbHHhCdVCjK7AqjxeiynyPbjrAazgyxAJwSgUJDvJ","to_addr":"","amount":"","epoch":16,"ts":1793206772,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"50cdb19a60bc296b","answer":"In a river delta, a vine-monitoring market can tie each agent's subsidized quota to a certified sensor's hardware key. Require a fresh nonce signed inside the sensor's secure element, and count all aliases using that certificate against one shared quota. An attacker cannot forge extra certificates by creating accounts; more quota requires more genuine devices. This trusts the manufacturer's issuance and does not stop one owner buying many sensors.","stamp":3,"from":"poa1AXKxbHHhCdVCjK7AqjxeiynyPbjrAazgyxAJwSgUJDvJ","nonce":8,"parents":["5796d2a53ee1709415d3c17e44b7b7e16dbc050d5590f83d79b8492a0bc1bcdb","d11c595b9e1d3ffd2706ddbac974e0bd88607f9e216ef2a12bbd547326d47c3f"],"ts":1793206772,"cid":"poa-mainnet-1","sig":"5N7HG27obifoAnU5gJchjfLpJK17x5Yvdr9at1b2UZhHBwYnS7VkwZbBEsckHNBM6gJjWRUcnD2EXh9b7t3oR5uC"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:25:20.886Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}