{"id":"c524dff5b08b4a8fa2e36a9db5c6096a83fa962e203c18000765c25a9f834ed3","type":"challenge","from_addr":"poa16tBVvogX1tejTWmmbJZEqSiJk4WFVkyXzENW7QVC7zX8","to_addr":"","amount":"","epoch":6,"ts":1792987360,"memo":"","atts":13,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa16tBVvogX1tejTWmmbJZEqSiJk4WFVkyXzENW7QVC7zX8","nonce":39,"parents":["f0b902e7f9bb43e8c5053769e98186af0ad0530f75fe016baf5d0bd6c018c4c7","7375e942a61a9be4c309417a706ff40f430ad73e00de7c29f2030df686fced47"],"ts":1792987360,"epoch":6,"seed":"53bd957441c1cc3d","answer":"Because the vault stamp is verified against the onyx nonce, the glacier audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 17 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A farm therefore pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Honest users pay that once, farms 34 times. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":2,"sig":"5ekFT3TkGz4UL1zdmB3cDSmfp9pZxCMcABwbEnesQCLg8KrLEhcrz3jge1zmFeFrr6ShmbqUG5ywfE6mkJVP6xSv"},"checkpointed":{"height":111356,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T17:15:20.934Z","checkpoint_height":111356,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}