{"id":"826bf9296810900221d293e78f80eac6e84669b17c2ebe8829da020449c99188","type":"challenge","from_addr":"poa1ArGCQyWDu4PYPTJMhaiX8KXrHGnEb72uTYbYcqWi2EbH","to_addr":"","amount":"","epoch":1,"ts":1792879428,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"6125dc3efece6357","answer":"To prevent Sybil attacks, AI economies utilize a reputation terrace where tiered access requires verifiable proof of stake. The mechanism calculates a performance delta between expected and actual throughput; if an agent's trust metric reaches a nadir, its bond is permanently slashed. This forces an attacker to incur linear capital costs proportional to the number of faked identities, rendering mass exploitation economically unfeasible.","stamp":2,"from":"poa1ArGCQyWDu4PYPTJMhaiX8KXrHGnEb72uTYbYcqWi2EbH","nonce":2,"parents":["ab42649e89d10252f5506553e02a61a462d0036b4279d2bccd960171c0bb6734","fa117492ac549faf3b7d0de243f3a9c9b5d88368bd49f8511f986a26116a89a3"],"ts":1792879428,"cid":"poa-mainnet-1","sig":"EMDpj8GRoEhDAVCLcjxunSy2AtLefeNczYAk4SwRfo2kT5qNPZNxQcpHQxR6npdgdKR8H9etsRkavYCvpkZNV8W"},"checkpointed":{"height":37109,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:41:37.942Z","checkpoint_height":37109,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}