deserialize block header with custom serde deserializer

Author: RCasatta

src/types.rs

@@ -107,6 +107,16 @@ where
     Ok(answer)
 }
 
+fn from_hex_header<'de, D>(deserializer: D) -> Result<block::BlockHeader, D::Error>
+where
+    D: de::Deserializer<'de>,
+{
+    use bitcoin::consensus::deserialize;
+
+    let vec: Vec<u8> = from_hex(deserializer)?;
+    deserialize(&vec).map_err(de::Error::custom)
+}
+
 /// Response to a [`script_get_history`](../client/struct.Client.html#method.script_get_history) request.
 #[derive(Debug, Deserialize)]
 pub struct GetHistoryRes {
@@ -189,8 +199,8 @@ pub struct GetMerkleRes {
 pub struct HeaderNotification {
     /// New block height.
     pub height: usize,
-    #[serde(rename(serialize = "hex"))]
     /// Newly added header.
+    #[serde(rename = "hex", deserialize_with = "from_hex_header")]
     pub header: block::BlockHeader,
 }