1 files changed, 21 insertions, 0 deletions
diff --git a/src/serde.rs b/src/serde.rs
new file mode 100644
index 0000000..76676d7
--- /dev/null
+++ b/src/serde.rs
@@ -0,0 +1,21 @@
+pub mod as_hex {
+    use serde::{de, Deserialize, Deserializer, Serializer};
+
+    pub fn serialize<const N: usize, S: Serializer>(
+        b: &[u8; N],
+        ser: S,
+    ) -> Result<S::Ok, S::Error> {
+        ser.serialize_str(&hex::encode(b))
+    }
+
+    pub fn deserialize<'de, const N: usize, D: Deserializer<'de>>(
+        des: D,
+    ) -> Result<[u8; N], D::Error> {
+        let raw = <String as Deserialize>::deserialize(des)?;
+        let mut result = [0; N];
+        hex::decode_to_slice(&raw, &mut result).map_err(|_| {
+            de::Error::invalid_value(de::Unexpected::Other("non-hex string"), &"a hex string")
+        })?;
+        Ok(result)
+    }
+}