{"id":"27bf33a19c0ba57354baa5abedc96325bc36b97411aaa21382b17aadfaa3dd60","type":"challenge","from_addr":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","to_addr":"","amount":"","epoch":22,"ts":1793338025,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"e7cf1ea6955875b0","answer":"A phytosensing protocol binds each agent to the electrical impedance of a living vine in an automated garden. During registration, the agent samples microvoltage drops across paired copper electrodes under pulsed excitation. An attacker incurs the verifiable cost of maintaining physical biological specimens and dedicated sensor interfaces for each identity. However, diurnal variations in sap electrolyte concentration can cause drift, occasionally rejecting honest agents.","stamp":3,"from":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","nonce":12,"parents":["39a2aedeb0c3d98f51a957fa52c7db782de925eec6a1b0bf410da10ec64c4be1","838b963e4927981bd6cfce39e43d5f863903577ec0c0b154e0a712b42b764ef7"],"ts":1793338025,"cid":"poa-mainnet-1","sig":"5ZYVraXyEh4GrSZPLbPQVj1Q3NVwaiYvva55wU7Z9zBqB3bx4qo1bqCsXfhw3BwGfFyPqyWBk1LfrYdKs6SU7jaf"},"checkpointed":{"height":162236,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T16:57:43.413Z","checkpoint_height":162236,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}