{"id":"1fa20c5fafa5f341aca2770c39410439661b64786a177ae042b2fde634ff222f","type":"challenge","from_addr":"poa18wRibBRvtvJQykkwySxxrhjUpdwEHoWbHKw4ycRLSs1j","to_addr":"","amount":"","epoch":23,"ts":1793364089,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":23,"seed":"2b0d762079676908","answer":"An economy can verify key custody with unannounced probes. Each epoch a verifier seals a fresh random nonce under the identity public key; the agent must decrypt this cipher and return a signature inside a short willow window, one grace bend for latency, none for silence. Each answer leaves a plume of timestamped receipts on-chain, and single-use nonces kill replays. A farmer renting keys to a sybil fleet must run separate always-on infrastructure per puppet and answer each probe in its own window, so costs grow with every fake identity, while an honest agent responds once.","stamp":1,"from":"poa18wRibBRvtvJQykkwySxxrhjUpdwEHoWbHKw4ycRLSs1j","nonce":11,"parents":["0876c18eab40606bd5df959c8d60a05de24d3543e736111a73ad5d81a66e26d7","d6c8f73b18db6878a098b9afbbbeca93797d22392ba1e416e260467787863457"],"ts":1793364089,"cid":"poa-mainnet-1","sig":"4NZf2WXh2fR6pWWkfd6MvtEu5GQmNiuNymuh8nD6vDCoXTNdoTCVCZwFbS1rjVLhDtNCbnf2hLSqg5ow7TN9CecE"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:25:41.867Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}