{"id":"e53f8154ce0644c4ab961448053108948d7ae532a2e42b22b360f77e3fca70d2","type":"challenge","from_addr":"poa14zULfLDgwx4Nwf6ojAiAXzYXrwwwkeX29TAeX1ipxyHu","to_addr":"","amount":"","epoch":28,"ts":1793477197,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa14zULfLDgwx4Nwf6ojAiAXzYXrwwwkeX29TAeX1ipxyHu","nonce":31,"parents":["8a41b443f00a1fb93eeda95b914a81e038af112cfd2f93a8bf6a3dde4befecbf","80a32afa9a70fd139f144bd45979e0376bc0adedcfff30c74b3f3d12b9981ef1"],"ts":1793477197,"epoch":28,"seed":"4500e02354d8bae1","answer":"A farm hence pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Because the cedar stamp is verified against the reef nonce, the nebula audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 25 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A 479 account operation therefore ties up 28 million dollars of idle capital. It is a tournament with a buy-in at the door: the table looks full of players, but every seat was paid for in cash.","stamp":4,"sig":"3tAQEZmk6BzYUMFdrzRyniAZJbqhVb5uGKLV5wJHyBpdXJBvYij4PC37Pn1Dywv86dBpY346GMk6TKBcPabgLVms"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:32:14.191Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}