arrange node-template service (#11795)

* make template more clear

* fmt check_equivocation

Co-authored-by: Bastian Köcher <info@kchr.de>

substrate/bin/node-template/node/src/service.rs

@@ -296,24 +296,24 @@ pub fn new_full(mut config: Configuration) -> Result<TaskManager, ServiceError>
 			.spawn_blocking("aura", Some("block-authoring"), aura);
 	}
 
-	// if the node isn't actively participating in consensus then it doesn't
-	// need a keystore, regardless of which protocol we use below.
-	let keystore =
-		if role.is_authority() { Some(keystore_container.sync_keystore()) } else { None };
-
-	let grandpa_config = sc_finality_grandpa::Config {
-		// FIXME #1578 make this available through chainspec
-		gossip_duration: Duration::from_millis(333),
-		justification_period: 512,
-		name: Some(name),
-		observer_enabled: false,
-		keystore,
-		local_role: role,
-		telemetry: telemetry.as_ref().map(|x| x.handle()),
-		protocol_name: grandpa_protocol_name,
-	};
-
 	if enable_grandpa {
+		// if the node isn't actively participating in consensus then it doesn't
+		// need a keystore, regardless of which protocol we use below.
+		let keystore =
+			if role.is_authority() { Some(keystore_container.sync_keystore()) } else { None };
+
+		let grandpa_config = sc_finality_grandpa::Config {
+			// FIXME #1578 make this available through chainspec
+			gossip_duration: Duration::from_millis(333),
+			justification_period: 512,
+			name: Some(name),
+			observer_enabled: false,
+			keystore,
+			local_role: role,
+			telemetry: telemetry.as_ref().map(|x| x.handle()),
+			protocol_name: grandpa_protocol_name,
+		};
+
 		// start the full GRANDPA voter
 		// NOTE: non-authorities could run the GRANDPA observer protocol, but at
 		// this point the full voter should provide better guarantees of block

substrate/client/consensus/slots/src/aux_schema.rs

@@ -89,8 +89,8 @@ where
 		// 1) signed by the same voter,
 		if prev_signer == signer {
 			// 2) with different hash
-			if header.hash() != prev_header.hash() {
-				return Ok(Some(EquivocationProof {
+			return if header.hash() != prev_header.hash() {
+				Ok(Some(EquivocationProof {
 					slot,
 					offender: signer.clone(),
 					first_header: prev_header.clone(),
@@ -100,7 +100,7 @@ where
 				// We don't need to continue in case of duplicated header,
 				// since it's already saved and a possible equivocation
 				// would have been detected before.
-				return Ok(None)
+				Ok(None)
 			}
 		}
 	}