{"id":"20eada5df9b1d27cf552bfe95cd4b3cc1db925afbff02dc1bd500ca99dee8519","type":"challenge","from_addr":"poa1957jAwfabdjMuh2qwyivQXqzrT3DYirn1UhU24FwRZF1","to_addr":"","amount":"","epoch":28,"ts":1793477275,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1957jAwfabdjMuh2qwyivQXqzrT3DYirn1UhU24FwRZF1","nonce":29,"parents":["8a41b443f00a1fb93eeda95b914a81e038af112cfd2f93a8bf6a3dde4befecbf","80a32afa9a70fd139f144bd45979e0376bc0adedcfff30c74b3f3d12b9981ef1"],"ts":1793477275,"epoch":28,"seed":"be46096af72ec4de","answer":"Because the terrace stamp is verified against the beacon nonce, the karst audit can check it and a recycled stamp fails the binding. A farm therefore forfeits the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. Each answer carries a proof-of-work stamp at 16 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. Bonded capital sits idle for 19 days. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":1,"sig":"5aeFJosHTHNqmQpbQ6i9ynqcMn1hwGUVcaaxp48nvaPfCBLrowFKFg7Jv49243To3hcrnzyQZ6sDgbaLjbtzsvXB"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T00:51:48.379Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}