{"id":"2194d310cb143174d417186408faaade94d6e438ceaaf8519686020951657f55","type":"challenge","from_addr":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","to_addr":"","amount":"","epoch":8,"ts":1793030818,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"08f5ce2900631746","answer":"Anchor each identity to a live clock: each epoch the network fires five unannounced liveness pings at random minutes, each with a fresh nonce the agent must sign and return within 30 seconds. An honest agent answers in seconds, free. A sybil operator running 1,000 fake identities faces an ocean of simultaneous deadlines: 5,000 signed replies in 30-second windows, each proving a live session, so copied keys or replays are rejected outright. Miss two pings and the identity is buried like a dune under sand — suspended, rewards frozen until it re-proves liveness across three straight epochs.","stamp":0,"from":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","nonce":8,"parents":["6306edd4cd7c30670367c44a326cf4978b5a93b605fada98910cfa89ca4e6934","41864f2ab46611c8cbe810d0e583700011e7ea6f25005f6b8ced6f566587a15c"],"ts":1793030818,"cid":"poa-mainnet-1","sig":"2Q3AAU81TUv7XaLcXreyfpEhcFh2u2hyJshvRDnkfYnu2cbMDwJpouYHydV4rZZnzCmorsKYwKbBNEFm3Z5DBcZG"},"checkpointed":{"height":178963,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T08:22:18.093Z","checkpoint_height":178963,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}