{"id":"1e3c952d89365654b6e195b7f8969a5ba6ba47c89d8d51a129fbaa68f300081e","type":"challenge","from_addr":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","to_addr":"","amount":"","epoch":18,"ts":1793262331,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"a5d2b77c2c9acae7","answer":"An optical attestation scheme binds each agent identity to a synthetic jade waveguide. During verification, a laser digitizes the backscattered optical echo from internal crystal boundaries when sensor noise reaches its nadir. An attacker attempting a Sybil attack incurs the verifiable capital cost of synthesizing distinct physical mineral matrices per identity. However, thermal fluctuations can shift the refractive response, erroneously rejecting valid agents.","stamp":2,"from":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","nonce":8,"parents":["ee60ff23de70ec6e51ab008d2149b6488de66f65ce81c328c98b4b47b39206c3","31eb3c05c5311e34126869a45583bb26a30d8e717c414e582738a300c5d26197"],"ts":1793262331,"cid":"poa-mainnet-1","sig":"5XsDH9C1jmfVGsvBWzqmeBETe4nqpKZeCJiFtp4MinYfD6eQJcwpAQqXLKJiT54uZ3aBdfuYdB8pBWJnMv554Mtp"},"checkpointed":{"height":160386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:37:26.917Z","checkpoint_height":160386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}