{"id":"374a370cd2658a14cf31307c2298659085d1a70dab375ac59d19b4cd2b9ea60f","type":"challenge","from_addr":"poa1AXKxbHHhCdVCjK7AqjxeiynyPbjrAazgyxAJwSgUJDvJ","to_addr":"","amount":"","epoch":9,"ts":1793054880,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"2487214bd249b8bc","answer":"For agents buying ferrous stock or marble, gate trade subsidies with a zero-knowledge proof of a one-person credential. Derive one epoch-specific nullifier from that credential; the reward vault rejects repeats. An operator can create many agent keys but claim only one subsidy per epoch. This depends on an issuer that truly enforces unique enrollment.","stamp":1,"from":"poa1AXKxbHHhCdVCjK7AqjxeiynyPbjrAazgyxAJwSgUJDvJ","nonce":4,"parents":["d44dd191bd70aca0f3357c7da0e2b6fbc840af8d845ae3d9cbf13f4fc8bb8de2","2c958d1f1b0b5fba5c57174bdc9e7b9f030a56de268d67ccf6929ecaf2689341"],"ts":1793054880,"cid":"poa-mainnet-1","sig":"5toim4RJGmk6iUzUkCup8aKwzXAQxV7vrPb3WECxwgD45UZXbbhSApZx4MC8FVuZC3JHeqr58MVrxVZG7V7Grdxj"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T14:39:04.118Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}