Checkout serde_utils from rayonism

consensus/serde_utils/src/hex_vec.rs

@@ -0,0 +1,23 @@
+//! Formats `Vec<u8>` as a 0x-prefixed hex string.
+//!
+//! E.g., `vec![0, 1, 2, 3]` serializes as `"0x00010203"`.
+
+use crate::hex::PrefixedHexVisitor;
+use serde::{Deserializer, Serializer};
+
+pub fn serialize<S>(bytes: &Vec<u8>, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    let mut hex_string: String = "0x".to_string();
+    hex_string.push_str(&hex::encode(&bytes));
+
+    serializer.serialize_str(&hex_string)
+}
+
+pub fn deserialize<'de, D>(deserializer: D) -> Result<Vec<u8>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    deserializer.deserialize_str(PrefixedHexVisitor)
+}