func checkRequestRange(kv dstorage.KV, reqs []*pb.RequestUnion) error {
for _, requ := range reqs {
greq := requ.RequestRange
if greq == nil || greq.Revision == 0 {
continue
}
if greq.Revision > kv.Rev() {
return dstorage.ErrFutureRev
}
if greq.Revision < kv.FirstRev() {
return dstorage.ErrCompacted
}
}
return nil
}