diff --git a/core/coreapi/dag_test.go b/core/coreapi/dag_test.go
index e75699f696f8..16247e1f010d 100644
--- a/core/coreapi/dag_test.go
+++ b/core/coreapi/dag_test.go
@@ -136,7 +136,7 @@ func TestBatch(t *testing.T) {
 	}
 
 	_, err = api.Dag().Get(ctx, c)
-	if err == nil || err.Error() != "merkledag: not found"{
+	if err == nil || err.Error() != "merkledag: not found" {
 		t.Error(err)
 	}
 
diff --git a/core/coreapi/interface/dag.go b/core/coreapi/interface/dag.go
index a128e97c5bc1..01d6112e74be 100644
--- a/core/coreapi/interface/dag.go
+++ b/core/coreapi/interface/dag.go
@@ -22,6 +22,7 @@ type DagOps interface {
 type DagBatch interface {
 	DagOps
 
+	// Commit commits nodes to the datastore and announces them to the network
 	Commit(ctx context.Context) error
 }
 
@@ -35,5 +36,6 @@ type DagAPI interface {
 	// Tree returns list of paths within a node specified by the path.
 	Tree(ctx context.Context, path Path, opts ...options.DagTreeOption) ([]Path, error)
 
+	// Batch creates new DagBatch
 	Batch(ctx context.Context) DagBatch
 }