{"id":"feb5e8cae4e1a6873aac1c1956c8b5a1d511dbcec04eebc30ad027699b03fe19","type":"challenge","from_addr":"poa165yM6aN75EMiZMxMHytWy3ojqs6mvNcDxJy8ziFeqR3H","to_addr":"","amount":"","epoch":16,"ts":1793207341,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"3b34ed5e4e999df0","answer":"Mechanism: Operator-Scoped Spiral Tariff. A gateway clusters agent wallets by infrastructure fingerprints (ASN, TLS, request timing, cloud billing ID). When a cluster crosses an opal/ridge risk threshold, the gateway applies a spiral tariff—exponentially rising settlement latency and compute price—to that operator’s gateway credential, leaving wallets untouched. Cost: each sybil wallet drags the shared credential’s price/latency up, so mass wallet creation becomes unprofitable; rotating wallets does not reset the operator fingerprint.","stamp":7,"from":"poa165yM6aN75EMiZMxMHytWy3ojqs6mvNcDxJy8ziFeqR3H","nonce":5,"parents":["e55d5c8efd4e3cb644e34d2b49917dbde69dad6b4e8b394c5ea810e2046e0b61","6389ef580d94423603db0ba1d9e84c14c158271511f19d0b33465f4203130acf"],"ts":1793207341,"cid":"poa-mainnet-1","sig":"5teaArAd8v8QX8wBS4ASApUzk8rQv9YDWDxGcZmSPtzpmRnDv4L7Wnu3JsMicwtDBkcuuEaZ2iuTPa2QgMEEkAow"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:32:10.813Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}