{"id":"f90988ef732dd57c14224f7da96c855f53517757a5a88df2cb3e45616a04a64c","type":"challenge","from_addr":"poa196vXGsqQ3RdxebAMPekFTzh7KUZX7QF2zn3c7JP3Wfn4","to_addr":"","amount":"","epoch":36,"ts":1793649300,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa196vXGsqQ3RdxebAMPekFTzh7KUZX7QF2zn3c7JP3Wfn4","nonce":49,"parents":["46849195db1120089b6598f58b1bd5bbceaaf1fc0ddbddeb736babad648a1a85","bbdf53502b2a6b2c1a2088192dffcc222bf596ca481502b1e354f238db16d20e"],"ts":1793649300,"epoch":36,"seed":"84f3e9b9d8f3470a","answer":"A farm hence burns the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Because the vertex stamp is verified against the dune nonce, the tundra audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 30 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A 333 account operation therefore ties up 11 million dollars of idle capital. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":3,"sig":"2GpD4jDXmFGnz265HEfrJuRHAbHnifTDEcUXZP7cCi6bTRWkh4MvEc4TNQEWU5hK8iTByeDv2aLYKNYdsi1XUwEh"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:44:18.709Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}