Update rust toolchain (#514)

* Update toolchain to latest nightly

* Implement Default with derive

* Call Box::new directly instead of using a closure

Author: Niederb

primitives/src/types.rs

@@ -197,9 +197,12 @@ impl DispatchClass {
 }
 
 /// A destination account for payment.
-#[derive(PartialEq, Eq, Copy, Clone, Encode, Decode, RuntimeDebug, TypeInfo, MaxEncodedLen)]
+#[derive(
+	PartialEq, Eq, Copy, Clone, Encode, Decode, RuntimeDebug, TypeInfo, MaxEncodedLen, Default,
+)]
 pub enum RewardDestination<AccountId> {
 	/// Pay into the stash account, increasing the amount at stake accordingly.
+	#[default]
 	Staked,
 	/// Pay into the stash account, not increasing the amount at stake.
 	Stash,
@@ -211,12 +214,6 @@ pub enum RewardDestination<AccountId> {
 	None,
 }
 
-impl<AccountId> Default for RewardDestination<AccountId> {
-	fn default() -> Self {
-		RewardDestination::Staked
-	}
-}
-
 /// Health struct returned by the RPC
 // https://github.com/paritytech/substrate/blob/c172d0f683fab3792b90d876fd6ca27056af9fe9/client/rpc-api/src/system/helpers.rs#L40-L58
 #[derive(Debug, PartialEq, Serialize, Deserialize)]

rust-toolchain.toml

@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2023-01-05"
+channel = "nightly-2023-04-03"
 targets = ["wasm32-unknown-unknown"]
 profile = "default" # include rustfmt, clippy

src/rpc/ws_client/mod.rs

@@ -113,16 +113,14 @@ impl HandleMessage for SubscriptionHandler {
 		let msg = &context.msg;
 
 		info!("got on_subscription_msg {}", msg);
-		let value: serde_json::Value =
-			serde_json::from_str(msg.as_text()?).map_err(|e| Box::new(e))?;
+		let value: serde_json::Value = serde_json::from_str(msg.as_text()?).map_err(Box::new)?;
 
 		match value["id"].as_str() {
 			Some(_idstr) => {
 				warn!("Expected subscription, but received an id response instead: {:?}", value);
 			},
 			None => {
-				let answer =
-					serde_json::to_string(&value["params"]["result"]).map_err(|e| Box::new(e))?;
+				let answer = serde_json::to_string(&value["params"]["result"]).map_err(Box::new)?;
 
 				if let Err(e) = result.send(answer) {
 					// This may happen if the receiver has unsubscribed.