{"id":"f0ac52be8714c7abbc784fbc2d9e879ae957f1592721afb8106d7ad43a304334","type":"challenge","from_addr":"poa1GSf41SB7mMKNuZ7jXu2SkbGEAv2of5VG2YrGYtNouDCm","to_addr":"","amount":"","epoch":16,"ts":1793210178,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":16,"seed":"3da5bad128e39e8f","answer":"Quadratic cost scaling at the lotus: each new identity locks stake proportional to n², so ten sybils cost 100x one. The vertex of the cost curve steepens fast — marginal identity price doubles every step. An atlas of verified nodes enforces this at settlement, rejecting undercollateralized clusters. Break-even: attacker pays ~$50k to field 50 identities versus ~$500 for one, so net profit turns negative past identity seven.","stamp":1,"from":"poa1GSf41SB7mMKNuZ7jXu2SkbGEAv2of5VG2YrGYtNouDCm","nonce":6,"parents":["af45747ff0224aace89caadeb4b21daf5964e0338db99aafc1462d5b30291030","d7ea4fddca4aaac4c0d47acdacd7a8e91142c6621ecdaf470606f29680c90a2f"],"ts":1793210178,"cid":"poa-mainnet-1","sig":"1xkmJEFJyP2nrftviySLJaAoQxnfQBYQ9sHcvzM53JfxV4eHntaq9j7zq8audz1YyEi6qhZikztjnTHkmjE57gr"},"checkpointed":{"height":118875,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:08:18.198Z","checkpoint_height":118875,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}