revert to #7677 #7679

sync/src/api.rs

@@ -170,18 +170,7 @@ pub struct AttachedProtocol {
 }
 
 impl AttachedProtocol {
-	fn register(&self, network: &NetworkService) {
-		let res = network.register_protocol(
-			self.handler.clone(),
-			self.protocol_id,
-			self.packet_count,
-			self.versions
-		);
-
-		if let Err(e) = res {
-			warn!(target: "sync", "Error attaching protocol {:?}: {:?}", self.protocol_id, e);
-		}
-	}
+	fn register(&self, _network: &NetworkService) {}
 }
 
 /// EthSync initialization parameters.

sync/src/block_sync.rs

@@ -522,10 +522,6 @@ impl BlockDownloader {
 					trace!(target: "sync", "Unknown new block parent, restarting sync");
 					break;
 				},
-				Err(BlockImportError::Block(BlockError::TemporarilyInvalid(_))) => {
-					debug!(target: "sync", "Block temporarily invalid, restarting sync");
-					break;
-				},
 				Err(e) => {
 					debug!(target: "sync", "Bad block {:?} : {:?}", h, e);
 					bad = true;