Implement ToHexPrefixed for &[u8;N] (#37)

iotaledger · Mar 17, 2022 · 62d8df7 · 62d8df7
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diff --git a/prefix-hex/CHANGELOG.md b/prefix-hex/CHANGELOG.md
@@ -19,6 +19,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Security -->
 
+## 0.2.0 - 2022-03-17
+
+### Added
+
+- Implementation of `ToHexPrefixed` for `&[u8;N]`;
+
 ## 0.1.0 - 2022-03-17
 
 ### Added

diff --git a/prefix-hex/Cargo.toml b/prefix-hex/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "prefix-hex"
-version = "0.1.0"
+version = "0.2.0"
 authors = [ "IOTA Stiftung" ]
 edition = "2021"
 description = "Encoding and decoding of hex strings with 0x prefix."

diff --git a/prefix-hex/src/data.rs b/prefix-hex/src/data.rs
@@ -45,6 +45,15 @@ where
     }
 }
 
+impl<const N: usize> ToHexPrefixed for &[u8; N]
+where
+    [u8; N]: hex::ToHex,
+{
+    fn to_hex_prefixed(self) -> String {
+        format!("0x{}", hex::encode(self))
+    }
+}
+
 impl ToHexPrefixed for &[u8] {
     fn to_hex_prefixed(self) -> String {
         format!("0x{}", hex::encode(self))

diff --git a/prefix-hex/tests/data.rs b/prefix-hex/tests/data.rs
@@ -56,6 +56,14 @@ fn array_encode() {
     );
 }
 
+#[test]
+fn array_reference_encode() {
+    assert_eq!(
+        prefix_hex::encode(&[0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]),
+        "0x0123456789abcdef"
+    );
+}
+
 #[test]
 fn vec_decode() {
     assert_eq!(prefix_hex::decode::<Vec<u8>>("0x000102").unwrap(), [0x0, 0x1, 0x2]);