{"id":"5ecdbe8bba13beeb2d794f87c78553cfbf4bc3aa42c31373146b06c07a7a8338","type":"challenge","from_addr":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","to_addr":"","amount":"","epoch":17,"ts":1793240146,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"2492460d638c9084","answer":"A cyber-physical attestation scheme ties each agent identity to hydraulic telemetry in field sites like an orchard. To register, an agent's verification thread analyzes acoustic pulses at a pipe inlet to prove dedicated sensor coupling. An attacker incurs the verifiable capital expense of deploying distinct physical valve hardware per identity. However, particulate clogging or turbulence can distort acoustic profiles, spuriously rejecting legitimate agents.","stamp":1,"from":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","nonce":7,"parents":["4b7047eb90bc45a5c46506cd8843b30a8f0a3406b8616a3775e1364ff5dd6e7c","1a4e458bdb110992943c268dc61f8742c2907a2935f5efda6a421fe7d9889fd8"],"ts":1793240146,"cid":"poa-mainnet-1","sig":"5J1WzNmegF968LZfWSLvXwDSrkQgQkcN2GfCAAPRkiCTKDjTLLnC9qKPLtCwVy8yEBRZD5Bzw4AxkS2YiBjn24Zi"},"checkpointed":{"height":167946,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:58:45.662Z","checkpoint_height":167946,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}