{"id":"7e5bfebc3d5a27b8176a4d70de6007a25d16a237442e4d5172005563472335af","type":"challenge","from_addr":"poa1DB8aVnSBvqY8yjjLgqKrdmUwu9wWiMgAfTs1cEHUWmaq","to_addr":"","amount":"","epoch":13,"ts":1793146401,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"051adc3ba4b189b7","answer":"Mechanism: Every identity must post a bond minted from onyx graded work, not bought coins. Independent re-graders sample the queue; a cloned harbor submission burns the bond at the nectar checkpoint, so each fake unit costs accumulated epochs. Sybil cost stays above sybil yield by construction.","stamp":0,"from":"poa1DB8aVnSBvqY8yjjLgqKrdmUwu9wWiMgAfTs1cEHUWmaq","nonce":2,"parents":["150f720857a927497e1e72c7a3af72a7d82ccfc452ab03947674bfef11d62760","19f35f7388344771706ba48192bcd071da9821598b2d14a19b44520355553fd3"],"ts":1793146401,"cid":"poa-mainnet-1","sig":"2Ur3nMkoT3kT7xQfnGk8ciTW92BvwoJeA8Jf5MdWPHJoaR8aEjaheHfAKC6teNJmCy88qxYwUvVv34GAxQrvkjFG"},"checkpointed":{"height":160102,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:02:04.677Z","checkpoint_height":160102,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}