Add PduId wrapper struct

Death to Vec<u8>

src/utils.rs

@@ -113,14 +113,14 @@ pub(crate) fn calculate_hash(keys: &[&[u8]]) -> Vec<u8> {
     hash.as_ref().to_owned()
 }
 
-pub(crate) fn common_elements<I, F>(
+pub(crate) fn common_elements<I, T, F>(
     mut iterators: I,
     check_order: F,
-) -> Option<impl Iterator<Item = Vec<u8>>>
+) -> Option<impl Iterator<Item = T>>
 where
     I: Iterator,
-    I::Item: Iterator<Item = Vec<u8>>,
-    F: Fn(&[u8], &[u8]) -> Ordering,
+    I::Item: Iterator<Item = T>,
+    F: Fn(&T, &T) -> Ordering,
 {
     let first_iterator = iterators.next()?;
     let mut other_iterators =