blockbook: use thiserror annotations to generate Display implemen…

…tation

src/lib.rs

@@ -74,22 +74,15 @@ pub mod websocket;
 #[derive(Debug, thiserror::Error)]
 pub enum Error {
     /// An error during a network request.
+    #[error("error occured during the network request: {0}")]
     RequestError(reqwest::Error),
     /// An error while parsing a URL.
+    #[error("invalid url: {0}")]
     UrlError(url::ParseError),
 }
 
 type Result<T> = std::result::Result<T, Error>;
 
-impl std::fmt::Display for Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        match self {
-            Error::RequestError(e) => e.fmt(f),
-            Error::UrlError(e) => e.fmt(f),
-        }
-    }
-}
-
 impl From<reqwest::Error> for Error {
     fn from(e: reqwest::Error) -> Self {
         Self::RequestError(e)

src/websocket.rs

@@ -61,43 +61,19 @@ use futures::{SinkExt, StreamExt};
 #[non_exhaustive]
 pub enum Error {
     /// An unexpected response format was encountered.
+    #[error("the json-rpc data field doesn't match the object expected based on its id")]
     DataObjectMismatch,
     /// Blockbook indicated an unsuccessful subscription attempt.
+    #[error("the server did not establish your subscription")]
     SubscriptionFailed,
     /// The WebSocket connection was closed.
+    #[error("the websocket connection got closed; reinstantiate the client to reconnect")]
     WebsocketClosed,
     /// A WebSocket error.
+    #[error("the websocket connection experienced a fatal error: {0:?}\nreinstantiate the client to reconnect")]
     WebsocketError(std::sync::Arc<tokio_tungstenite::tungstenite::Error>),
 }
 
-impl std::fmt::Display for Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        match self {
-            Self::DataObjectMismatch => {
-                write!(
-                    f,
-                    "the json-rpc data field doesn't match the object expected based on its id"
-                )
-            }
-            Self::SubscriptionFailed => {
-                write!(f, "the server did not establish your subscription")
-            }
-            Self::WebsocketClosed => {
-                write!(
-                    f,
-                    "the websocket connection got closed; reinstantiate the client to reconnect"
-                )
-            }
-            Self::WebsocketError(e) => {
-                write!(
-                    f,
-                    "the websocket connection experienced a fatal error: {e:?}\nreinstantiate the client to reconnect"
-                )
-            }
-        }
-    }
-}
-
 type Result<T> = std::result::Result<T, Error>;
 
 /// Information about the full node backing the Blockbook server and the chain state.