def header.magic.checked
import mylsm-lsm-store@0.6.0.1/src/transfer/Restore.bend as Restoreimport Base
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes
164def header.magic.checked(input: Bytes.Bytes, valid: Bool) -> Result<&1, &1, Error, Header>:
165 match valid:
166 case False{}: Fail{InvalidFormat{}}
167 case True{}: header.version(Bytes.get.u32be(input, 8))