diff --git a/explorer/explorer.go b/explorer/explorer.go
index 78f3499b..bf7cd592 100644
--- a/explorer/explorer.go
+++ b/explorer/explorer.go
@@ -24,10 +24,12 @@ func NewExplorer(s Store) *Explorer {
 	return &Explorer{s: s}
 }
 
+// Tip returns the tip of the best known valid chain.
 func (e *Explorer) Tip() (types.ChainIndex, error) {
 	return e.s.Tip()
 }
 
+// Block returns the block with the specified ID.
 func (e *Explorer) Block(id types.BlockID) (types.Block, error) {
 	return e.s.Block(id)
 }
diff --git a/persist/sqlite/txn.go b/persist/sqlite/txn.go
index fba3b3f7..f091a6c8 100644
--- a/persist/sqlite/txn.go
+++ b/persist/sqlite/txn.go
@@ -75,9 +75,5 @@ func (s *Store) ProcessChainRevertUpdate(cru *chain.RevertUpdate) error {
 	if err := s.applyUpdates(); err != nil {
 		return err
 	}
-	if err := s.deleteBlock(cru.Block.ID()); err != nil {
-		return err
-	}
-
-	return nil
+	return s.deleteBlock(cru.Block.ID())
 }