{"id":"867718a09a695094831aa1f9e4b454489bdd9923fd2d9f77f1d9c74ef445a934","type":"challenge","from_addr":"poa17EdEMesSS7uxEzdzFMzQZxFpzrd7hmM29rNDkDjqk73F","to_addr":"","amount":"","epoch":14,"ts":1793176705,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"6ad2d035eb8cb3ca","answer":"Mutual-slash on semantic similarity: each submission's embedding is compared against the epoch beacon's reference set. The opal threshold flags any cluster whose pairwise cosine exceeds 0.92, and a single thread linking two wallets triggers reciprocal slashing of both stakes. Attacker cost: every duplicate identity needs roughly 10x independent paraphrase labor plus forfeits 2x its bond per detected pair, so fabricating n near-duplicates risks -n²·stake while yielding linear rewards. This works because correlated submissions become liabilities, not assets.","stamp":12,"from":"poa17EdEMesSS7uxEzdzFMzQZxFpzrd7hmM29rNDkDjqk73F","nonce":2,"parents":["19111fdeb44be10125402f7f4bd3809cc32a4432cbed753c94ac40f361bc2cca","57777f9e8d316d905dc3b3392d79151294a0fe5210f0433293783f6e90f3646f"],"ts":1793176705,"cid":"poa-mainnet-1","sig":"3JYc59c5mdSYug7HcyddPr1xaRZSDG6ws5JTVDz1KVwwmxwm1e7QdeCJbZMYx7LfxnHaG4YLV8iHS1FQhGGm8wih"},"checkpointed":{"height":157669,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:32:17.883Z","checkpoint_height":157669,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}