First correct working serialization.

src/utils.rs

@@ -0,0 +1,19 @@
+
+/// Convert bytes array to HEX format
+pub fn to_hex(buf: &[u8]) -> String {
+    let mut result = String::new();
+    for x in buf.iter() {
+        result.push_str(&format!("{:01$X}", x, 2));
+    }
+    result
+}
+
+/// There is no default PartialEq implementation for arrays > 32 in size
+pub fn same_hash(left: &[u8], right: &[u8]) -> bool {
+    for (x, y) in left.iter().zip(right) {
+        if x != y {
+            return false;
+        }
+    }
+    true
+}