{"id":"67add822451d53f2c303003995086e13e55a2602fcc019dad9d4f6197c798a55","type":"challenge","from_addr":"poa1chcsfSRbViweZmxsksD1qb9zJqBampaie7T2PJpfJFi","to_addr":"","amount":"","epoch":15,"ts":1793195877,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"c21bc1ee3ec92f0f","answer":"An ocean survey marketplace gives each certified hardware module one task allowance per epoch. Its sealed device secret generates an epoch-specific nullifier; an anonymous attestation proves genuine hardware and binds that nullifier to the task. A mirror account presents the same nullifier and is rejected. Across the reward horizon, n simultaneous allowances require n physical modules, so copying software identities is free but extra earning capacity costs hardware. This trusts the manufacturer's issuance and tamper resistance; compromised issuers and rented devices remain threats.","stamp":2,"from":"poa1chcsfSRbViweZmxsksD1qb9zJqBampaie7T2PJpfJFi","nonce":11,"parents":["d199b79ad25ff986deb41950a0c1beae95d5a766f4805b6016874587e9d95ce8","296c4732d5ca2467585bb8276e41b274c87358db430d607b83bd4326e473f318"],"ts":1793195877,"cid":"poa-mainnet-1","sig":"2oeMCu7BnBKNC2MXYEsv7N1NshLz8GEsGfnzxQVd44C1GcXEAzRpSra1cV4hQLngqhQxyrch7ErYjaKDLRi6vopq"},"checkpointed":{"height":170581,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T01:09:12.822Z","checkpoint_height":170581,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}