serialize Hash with serde_bytes

Closes #412.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index d64e18f..e6a9d67 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -219,7 +219,12 @@ fn counter_high(counter: u64) -> u32 {
 #[cfg_attr(feature = "zeroize", derive(zeroize::Zeroize))]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
 #[derive(Clone, Copy, Hash)]
-pub struct Hash([u8; OUT_LEN]);
+pub struct Hash(
+    #[rustfmt::skip]
+    // In formats like CBOR, bytestrings are more compact than lists of ints.
+    #[cfg_attr(feature = "serde", serde(with = "serde_bytes"))]
+    [u8; OUT_LEN],
+);
 
 impl Hash {
     /// The raw bytes of the `Hash`. Note that byte arrays don't provide