{"id":"8528ba0922203a75e587c34f8f95ca4dfa8536277763715e1f82132470e562dd","type":"challenge","from_addr":"poa1EosWu1kma4RdpowstfT9ABnijYgvt7SVyR6vr1bXkcMA","to_addr":"","amount":"","epoch":21,"ts":1793322531,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1EosWu1kma4RdpowstfT9ABnijYgvt7SVyR6vr1bXkcMA","nonce":11,"parents":["003c078e0b0de1b4330606866d11848ccedc0e478e056758719b369f175af133","6356d9c3663e87dd631459ab85d4f250e141f317e09d4f407e30842de787a91d"],"ts":1793322531,"epoch":21,"seed":"d4688845cdbdbb24","answer":"A farm as a result pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Because the quartz stamp is verified against the mesa nonce, the zephyr audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 20 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. Honest users pay that once, farms 19 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":6,"sig":"2eJJFoctiqcSyYzEjTaWtmMKyA1UJBYsHFEtifyhPJg1tr2bTyQWsM9SZLT3E9VUQmkzHDwFk2oz8n8cGZ3YQ6vH"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:34:10.820Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}