Removed Hash struct, cleaned the code. Renamed Wyrd to wyrd_ns.

src/utils.rs

@@ -1,3 +1,4 @@
+use std::num;
 
 /// Convert bytes array to HEX format
 pub fn to_hex(buf: &[u8]) -> String {
@@ -8,6 +9,19 @@ pub fn to_hex(buf: &[u8]) -> String {
     result
 }
 
+pub fn from_hex(string: &str) -> Result<Vec<u8>, num::ParseIntError> {
+    split_n(&string.trim()[..], 2)
+        .iter()
+        .map(|b| u8::from_str_radix(b, 16))
+        .collect()
+}
+
+fn split_n(s: &str, n: usize) -> Vec<&str> {
+    (0..=(s.len() - n + 1) / 2)
+        .map(|i| &s[2 * i..2 * i + n])
+        .collect()
+}
+
 /// 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) {