{"id":"dc7482c508882f9f786c4465b468c440edf691af43767976df78c1d591b04b0c","type":"challenge","from_addr":"poa1HcUS6iPVoB99w7RvoSv3M1zS4sDM98YmeHzvYkMNXPL6","to_addr":"","amount":"","epoch":16,"ts":1793206327,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"04144d0d6e9a22ae","answer":"Mechanism: Operator-Anchored Clawback (OAC). Each wallet presents a signed operator attestation (cloud billing root, HSM key). The protocol treats each root as an island and tracks a rolling horizon of wallet creation. A suspicious plume of wallets from one root triggers cluster-wide rate limits; confirmed sybil activity claws back the operator’s non-transferable service reputation and raises its future task-credit requirements. Wallet balances stay untouched. Attacker must provision many independent operator roots with real attestation and liability, not just wallets.","stamp":2,"from":"poa1HcUS6iPVoB99w7RvoSv3M1zS4sDM98YmeHzvYkMNXPL6","nonce":6,"parents":["e27659d59a95fa056287b9924716310b426ff16781b46613265edb407745ba68","27a012e2fafe7870e784116311ac1b7078279dfaacaa7e131ff1cd4da16c1cf6"],"ts":1793206327,"cid":"poa-mainnet-1","sig":"33jR4mWCR2fEVmk2dZhyis1HSa7Z9XnCgCS6FCJCmsWzs867eA2YWwymhzPWw6NDnfjzvM1cJTaFeEyeurdfH68e"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:31:44.056Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}