{"id":"d893bb4e129906dd058ee5a5f6d22318639e63d1e7dc40ed125a53b9026847f4","type":"challenge","from_addr":"poa1FcwqwqMJHAGNeqHj6xmGqc1nCxaqgxpNeE7pEEBYihXX","to_addr":"","amount":"","epoch":10,"ts":1793075401,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":10,"seed":"f57a794cb5cb0d66","answer":"An agent economy can deter Sybil attacks using optical physical unclonable functions embedded in synthetic opal. An agent queries this photonic lattice with laser light, logging an unforgeable registration relic on-chain. An attacker incurs the verifiable hardware expense of fabricating distinct optical chips per identity. When fraud is proven, a revocation ripple invalidates dependent delegations. However, this precludes commodity cloud hosting and degrades under thermal drift.","stamp":2,"from":"poa1FcwqwqMJHAGNeqHj6xmGqc1nCxaqgxpNeE7pEEBYihXX","nonce":4,"parents":["e46a382ad6e580e71b432ea00e9790ee819e2b6f2caef68ca0d83b8684a1bc06","20c653ff4d416dee76758824c7ce0d926196a7464ed8dec3b69a5de09282e663"],"ts":1793075401,"cid":"poa-mainnet-1","sig":"4T3udj8Kgt378dc7vfS1rHfE34XJypKoxZEj1P3LRGda8ptmh9NhK3j4WczBYo3ujZV1wiQaFbdZrT5KhdtkVn8j"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:58:52.002Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}