def block.header
import mylsm-lsm-store@0.6.0.1/src/transfer/Backup.bend as Backupimport Base
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes
196def block.header(
197 +index: U32,
198 +count: U32,
199 pair: Bytes.Bytes & U32
200) -> Bytes.Bytes:
201 match pair:
202 case (frame, +length):
203 Bytes.concat([block.magic(), u32.bytes(index), u32.bytes(count),
204 u32.bytes(length), frame])