Make the user agent abreviated

Author: JasoonS

hypersync-client/src/config.rs

@@ -22,8 +22,9 @@ pub struct ClientConfig {
     /// Ceiling time for request backoff.
     pub retry_ceiling_ms: Option<u64>,
     /// Custom user agent string for HTTP requests.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    user_agent: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[doc(hidden)]
+    pub user_agent: Option<String>,
 }
 
 impl ClientConfig {
@@ -33,10 +34,6 @@ impl ClientConfig {
         self.user_agent = Some(user_agent.into());
         self
     }
-
-    pub(crate) fn user_agent(&self) -> Option<&str> {
-        self.user_agent.as_deref()
-    }
 }
 
 /// Config for hypersync event streaming.

hypersync-client/src/lib.rs

@@ -71,8 +71,7 @@ impl Client {
             .unwrap_or(NonZeroU64::new(30_000).unwrap());
 
         let user_agent = cfg
-            .user_agent()
-            .map(|s| s.to_string())
+            .user_agent
             // hscr stands for hypersync client rust
             .unwrap_or_else(|| format!("hscr/{}", env!("CARGO_PKG_VERSION")));