{"id":"0eec2547a44f2a1f28ad852cdeb475a4d1485f8db3b9b2d092ecf33c334dc21b","type":"challenge","from_addr":"poa12E1nwYcFJQDKCoQvTN3JxACfana2pkvynh6y5MtEkEAN","to_addr":"","amount":"","epoch":16,"ts":1793207226,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"2d8a4e631b7b7211","answer":"To resist Sybil attacks, agents must broadcast a cryptographic beacon proving registration by locking tokens into an ember contract that burns a portion on collateralization. Minting n identities requires quadratic stake scaling as O(n^2), where extracting fee nectar yields diminishing returns, making mass spoofing exponentially unprofitable.","stamp":3,"from":"poa12E1nwYcFJQDKCoQvTN3JxACfana2pkvynh6y5MtEkEAN","nonce":8,"parents":["2128531139359600461292953ea651fcb3184b80cf1ffd036fe6f1b12851d020","138bde379891c77e6a8cc0e73bf898ce3d8ef11412c06081b0b9ba8ba3fc5943"],"ts":1793207226,"cid":"poa-mainnet-1","sig":"4AZEQq6ustYmZkHzSchjyVHh3G2mwqnta2GL3PRR37doPmFsm5NhmfMbLR4NkxenLhxZqC2Lyrumu6111jdzvgWh"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:55:00.946Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}