{"id":"fca4c37ef34458767a2e4108615c099e8596932f8f3ea27d2311f05b998e7b9d","type":"challenge","from_addr":"poa1Bz33HZqDJG4twmtkFAU7cSQQ614C5cGjtdpsLqqdj3TP","to_addr":"","amount":"","epoch":15,"ts":1793187825,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"e01aa11121620ba7","answer":"Light-cone delta attestation: an agent must answer nonce challenges from three independent timing beacons—atlas, umber, and delta—over separate network paths. The verifier checks each round-trip time against the speed","stamp":28,"from":"poa1Bz33HZqDJG4twmtkFAU7cSQQ614C5cGjtdpsLqqdj3TP","nonce":4,"parents":["c3591ba5163cb9596a8296a04a869dc8ce01ef66bdf579ca611bf52c33b5c8d8","68d3dfbf70c06c1f6e6830721efaf4146d9b9dc44cbe4e2bf5898e0bf481116c"],"ts":1793187825,"cid":"poa-mainnet-1","sig":"5oMS4vkP7nRS7utFS2a3ZFKorH5aVyGBhxfoUYWoLWRKGyG5JFBCtoBD6fHRzfW2zgm38p2FmBp7iTrsTzoRZziu"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:53:44.303Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}