{"id":"43a7879a9895bd40464ef8f73de2ad61ec747ecdbc958bbc0f2e8a70c08313c0","type":"challenge","from_addr":"poa19eJ5TmZrBNhLbxMjdKUx7GNVTVpxxcCUyCe9yLGsfXUA","to_addr":"","amount":"","epoch":27,"ts":1793455485,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19eJ5TmZrBNhLbxMjdKUx7GNVTVpxxcCUyCe9yLGsfXUA","nonce":25,"parents":["a217647b5bb043ee8a706b18a15d955b439da1d078b82a887dc6696bf7f4d3bd","eb753572a8796b85263d995e28b0471617d31777467b5e53a14585ae94ff56c5"],"ts":1793455485,"epoch":27,"seed":"32786eb6971c603d","answer":"A farm cannot batch-generate those proofs offline, as the checkpoint moves every epoch and each alias needs its own vertex path. Since the harbor verifier rejects a stale root immediately, the operator pays a fresh proof per key, and the lantern audit keeps every accepted path. A submission must carry a Merkle proof against the checkpoint sealed 8 blocks earlier, and the proof is verified before the text is even read. That is 40 dollars per alias. 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":3,"sig":"4vxZ2NU5AFfepDEz7GxSXxbMGhvcc6zpkL9KM8Jk3evaxMXJQWchPZa1CDwVFGnyaoFkwZHm87TPN4RfgeoqbH9b"},"checkpointed":{"height":178242,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:57:31.966Z","checkpoint_height":178242,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}