improve: use thiserror

crates/cashu-sdk/Cargo.toml

@@ -27,6 +27,7 @@ url = { workspace = true }
 tracing = { workspace = true }
 futures-util = { version = "0.3", default-features = false, features = ["sink", "std"] }
 once_cell = { version = "1.17", optional = true }
+thiserror = { workspace = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 tokio = { workspace = true, features = ["rt-multi-thread", "time", "macros", "sync"] }

crates/cashu-sdk/src/wallet.rs

@@ -1,6 +1,4 @@
 //! Cashu Wallet
-use std::error::Error as StdError;
-use std::fmt;
 use std::str::FromStr;
 
 use cashu::dhke::{construct_proofs, unblind_message};
@@ -14,47 +12,27 @@ use cashu::Amount;
 pub use cashu::Bolt11Invoice;
 #[cfg(feature = "nut07")]
 use cashu::{nuts::nut00::mint, types::ProofsStatus};
+use thiserror::Error;
 use tracing::warn;
 
 #[cfg(feature = "blocking")]
 use crate::client::blocking::Client;
 #[cfg(not(feature = "blocking"))]
 use crate::client::Client;
 
-#[derive(Debug)]
+#[derive(Debug, Error)]
 pub enum Error {
     /// Insufficient Funds
+    #[error("Insuddicient Funds")]
     InsufficientFunds,
-    Cashu(cashu::error::wallet::Error),
-    Client(crate::client::Error),
+    #[error("`{0}`")]
+    Cashu(#[from] cashu::error::wallet::Error),
+    #[error("`{0}`")]
+    Client(#[from] crate::client::Error),
+    #[error("`{0}`")]
     Custom(String),
 }
 
-impl StdError for Error {}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Error::InsufficientFunds => write!(f, "Insufficient Funds"),
-            Error::Cashu(err) => write!(f, "{}", err),
-            Error::Client(err) => write!(f, "{}", err),
-            Error::Custom(err) => write!(f, "{}", err),
-        }
-    }
-}
-
-impl From<cashu::error::wallet::Error> for Error {
-    fn from(err: cashu::error::wallet::Error) -> Self {
-        Self::Cashu(err)
-    }
-}
-
-impl From<crate::client::Error> for Error {
-    fn from(err: crate::client::Error) -> Error {
-        Error::Client(err)
-    }
-}
-
 #[derive(Clone, Debug)]
 pub struct Wallet {
     pub client: Client,