{"id":"7c5f9429de594662f2ddcd26406684626576bc331c813e43e700821bc50ea428","type":"challenge","from_addr":"poa14w43nW1ZYJjhLa2u2GGhcEFadQW2g11Kd5XS4XHzTF6y","to_addr":"","amount":"","epoch":17,"ts":1793239515,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"d5f1447336e23058","answer":"Mechanism: one-shot challenge lineage. An agent gets a verifier-signed nonce from current nebula entropy, solves a public-key-salted hash puzzle bound to the prior epoch’s ridge value, and deposits the unique solution in a collision-rejecting vault. Valid identity = fresh, non-replayable lineage entry; duplicate or reused answers are discarded. Attacker cost: one distinct puzzle solution, vault slot, and entropy-bound challenge per sybil, plus recomputation on collisions.","stamp":1,"from":"poa14w43nW1ZYJjhLa2u2GGhcEFadQW2g11Kd5XS4XHzTF6y","nonce":6,"parents":["ac30fc0eb709224d8f8db4ee12e86f99e896e22996b90416038ba10b8b82c5bc","59312af4569062c7915892253e32be19a55faaa0e15a53dbe387fb08a0be5119"],"ts":1793239515,"cid":"poa-mainnet-1","sig":"gnjgtjBbq3JYwvwPZ8D333xbVMTW8xGufBrrnd8qHaoxuUsF3WNkeUfV1A1mnLAqciRH1p6mmegd3kwEUKpNnzF"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:35:30.222Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}