diff --git a/core/blockchain.go b/core/blockchain.go
index a450245e94..937d82d9db 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -582,7 +582,10 @@ func NewParallelBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis
 	// Open trie database with provided config
 	triedb := bc.triedb
 
-	chainConfig, _, genesisErr := SetupGenesisBlockWithOverride(db, triedb, genesis, overrides)
+	chainConfig, _, _, genesisErr := SetupGenesisBlockWithOverride(db, triedb, genesis, overrides)
+	if err != nil {
+		return nil, err
+	}
 
 	if _, ok := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !ok {
 		return nil, genesisErr
@@ -622,7 +625,7 @@ func (bc *BlockChain) ProcessBlock(block *types.Block, parent *types.Header) (_
 		usedGas  uint64
 		err      error
 		statedb  *state.StateDB
-		counter  metrics.Counter
+		counter  *metrics.Counter
 		parallel bool
 	}
 
@@ -1557,7 +1560,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 		if first.NumberU64() == 1 {
 			if frozen, _ := bc.db.Ancients(); frozen == 0 {
 				td := bc.genesisBlock.Difficulty()
-				writeSize, err := rawdb.WriteAncientBlocks(bc.db, []*types.Block{bc.genesisBlock}, []types.Receipts{nil}, td)
+				writeSize, err := rawdb.WriteAncientBlocks(bc.db, []*types.Block{bc.genesisBlock}, []types.Receipts{nil}, []types.Receipts{nil}, td)
 				if err != nil {
 					log.Error("Error writing genesis to ancients", "err", err)
 					return 0, err
@@ -1588,7 +1591,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 
 		// Write all chain data to ancients.
 		td := bc.GetTd(first.Hash(), first.NumberU64())
-		writeSize, err := rawdb.WriteAncientBlocks(bc.db, blockChain, receiptChain, td)
+		writeSize, err := rawdb.WriteAncientBlocks(bc.db, blockChain, receiptChain, borReceipts, td)
 		if err != nil {
 			log.Error("Error importing chain data to ancients", "err", err)
 			return 0, err
@@ -1821,7 +1824,7 @@ func (bc *BlockChain) writeBlockWithState(block *types.Block, receipts []*types.
 	// Calculate the total difficulty of the block
 	ptd := bc.GetTd(block.ParentHash(), block.NumberU64()-1)
 	if ptd == nil {
-		return consensus.ErrUnknownAncestor
+		return []*types.Log{}, consensus.ErrUnknownAncestor
 	}
 	// Make sure no inconsistent state is leaked during insertion
 	externTd := new(big.Int).Add(block.Difficulty(), ptd)
diff --git a/core/blockchain_reader.go b/core/blockchain_reader.go
index 692c306c47..a96e891048 100644
--- a/core/blockchain_reader.go
+++ b/core/blockchain_reader.go
@@ -488,6 +488,11 @@ func (bc *BlockChain) SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Su
 	return bc.scope.Track(bc.chainHeadFeed.Subscribe(ch))
 }
 
+// SubscribeChainSideEvent registers a subscription of ChainSideEvent.
+func (bc *BlockChain) SubscribeChainSideEvent(ch chan<- ChainSideEvent) event.Subscription {
+	return bc.scope.Track(bc.chainSideFeed.Subscribe(ch))
+}
+
 // SubscribeLogsEvent registers a subscription of []*types.Log.
 func (bc *BlockChain) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return bc.scope.Track(bc.logsFeed.Subscribe(ch))