Add serialization {de}serialize_hex

src/serialization.rs

@@ -11,6 +11,29 @@ pub struct OutPointMemberMap(#[serde(with = "members_map")] pub HashMap<OutPoint
 #[derive(Debug, Serialize, Deserialize)]
 pub struct OutPointProcessMap(#[serde(with = "outpoint_map")] pub HashMap<OutPoint, Process>);
 
+// These helper functions convert a [u8; 32] to/from a hex string.
+pub(crate) fn serialize_hex<S>(bytes: &[u8; 32], serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    let hex_str = bytes.to_lower_hex_string();
+    serializer.serialize_str(&hex_str)
+}
+
+pub(crate) fn deserialize_hex<'de, D>(deserializer: D) -> Result<[u8; 32], D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s = String::deserialize(deserializer)?;
+    let bytes = Vec::from_hex(&s).map_err(D::Error::custom)?;
+    if bytes.len() != 32 {
+        return Err(D::Error::custom("Invalid length for [u8;32]"));
+    }
+    let mut arr = [0u8; 32];
+    arr.copy_from_slice(&bytes);
+    Ok(arr)
+}
+
 pub mod members_map {
     use super::*;
     use crate::pcd::Member;