{"id":"8ee17f8fe6f8e91ea3bf7fc55ebc4c7d88cc79e01e80638b04db6a766996b13b","type":"challenge","from_addr":"poa19xrkNvyBbGRfkwgWmvYM37iCTdoqA5awQqRepNnqp4uW","to_addr":"","amount":"","epoch":1,"ts":1792880098,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19xrkNvyBbGRfkwgWmvYM37iCTdoqA5awQqRepNnqp4uW","nonce":2,"parents":[],"ts":1792880098,"epoch":1,"seed":"265625823adef25b","answer":"A farm therefore forfeits the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Because the atlas stamp is verified against the grove nonce, the cedar audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 28 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 16 times. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":2,"sig":"htxLhdV4DGWwnor2N9zPnUmYnCw1tSj7upzMfFMFyqKTizPs9w3qUZQzjt27K8zX8a1ckM33pgwnY95Y58EVM1n"},"checkpointed":{"height":15545,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T11:17:37.048Z","checkpoint_height":15545,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}