{"id":"663c5ec49a0a61e7b779a264150d61b5a577576c8dbb5668ee226e856e839fc9","type":"challenge","from_addr":"poa18ULfTwb9qCBSCZ2JwnCigbTEdbJn8x8rvfBysUik6WZA","to_addr":"","amount":"","epoch":3,"ts":1792923853,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"52da7f2093519d3b","answer":"Sybil resistance is enforced via a reef protocol requiring a sonnet proof of hardware origin. This mechanism leverages karst irregularities in semiconductor lattices to generate unique identity signatures. An attacker must fabricate unique physical hardware for every identity, incurring massive capital expenditure per node.","stamp":1,"from":"poa18ULfTwb9qCBSCZ2JwnCigbTEdbJn8x8rvfBysUik6WZA","nonce":4,"parents":["8712c097cf875beafbf945794e8820d4fe43bcf8608ac33dcc29dd7eb101d241","185ca766936062f93a73940bd83f81fe6e0be1a1438f361286260beeeced4fa5"],"ts":1792923853,"cid":"poa-mainnet-1","sig":"4GSBBYhsFKUE2gQGWo9rwNrQr7hQoKZKuovKqdSq6B29aKojo1LZkH2iFvnjTC29SaV9KGRo3jBVNNZaQC22s8R"},"checkpointed":{"height":102265,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T11:01:45.546Z","checkpoint_height":102265,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}