address comments

dot/sync/chain_sync.go

@@ -700,7 +700,6 @@ func (cs *chainSync) doSync(req *network.BlockRequestMessage, peersTried map[pee
 }
 
 func (cs *chainSync) handleReadyBlock(bd *types.BlockData) {
-	// first check that the block isn't already in the ready queue
 	if cs.readyBlocks.has(bd.Hash) {
 		logger.Tracef("ignoring block %s in response, already in ready queue", bd.Hash)
 		return
@@ -715,12 +714,11 @@ func (cs *chainSync) handleReadyBlock(bd *types.BlockData) {
 			// let's check the db as maybe we already processed it
 			has, err := cs.blockState.HasHeader(bd.Hash)
 			if err != nil && !errors.Is(err, chaindb.ErrKeyNotFound) {
-				logger.Debugf("failed to check if header is known for hash %s: err=%s", bd.Hash, err)
+				logger.Debugf("failed to check if header is known for hash %s: %s", bd.Hash, err)
 				return
 			}
 
 			if has {
-				// seems we already processed the block, so let's just return
 				logger.Tracef("ignoring block we've already processed, hash=%s", bd.Hash)
 				return
 			}

dot/sync/tip_syncer.go

@@ -14,7 +14,7 @@ import (
 
 var _ workHandler = &tipSyncer{}
 
-type handleReadyBlockFunc = func(*types.BlockData)
+type handleReadyBlockFunc func(*types.BlockData)
 
 // tipSyncer handles workers when syncing at the tip of the chain
 type tipSyncer struct {