diff --git a/go-sdk/internal/sparse-merkle-tree/smt/merkletree.go b/go-sdk/internal/sparse-merkle-tree/smt/merkletree.go
index 3a2dfcc..ca490e9 100644
--- a/go-sdk/internal/sparse-merkle-tree/smt/merkletree.go
+++ b/go-sdk/internal/sparse-merkle-tree/smt/merkletree.go
@@ -23,7 +23,6 @@ import (
 
 	"github.com/hyperledger-labs/zeto/go-sdk/internal/log"
 	"github.com/hyperledger-labs/zeto/go-sdk/internal/sparse-merkle-tree/node"
-	"github.com/hyperledger-labs/zeto/go-sdk/internal/sparse-merkle-tree/storage"
 	"github.com/hyperledger-labs/zeto/go-sdk/internal/sparse-merkle-tree/utils"
 	"github.com/hyperledger-labs/zeto/go-sdk/pkg/sparse-merkle-tree/core"
 )
@@ -46,7 +45,7 @@ func NewMerkleTree(db core.Storage, maxLevels int) (core.SparseMerkleTree, error
 	mt := sparseMerkleTree{db: db, maxLevels: maxLevels}
 
 	root, err := mt.db.GetRootNodeIndex()
-	if err == storage.ErrNotFound {
+	if err == core.ErrNotFound {
 		mt.rootKey = node.ZERO_INDEX
 		err = mt.db.UpsertRootNodeIndex(mt.rootKey)
 		if err != nil {
diff --git a/go-sdk/internal/sparse-merkle-tree/smt/merkletree_test.go b/go-sdk/internal/sparse-merkle-tree/smt/merkletree_test.go
index d80ff83..77ef41c 100644
--- a/go-sdk/internal/sparse-merkle-tree/smt/merkletree_test.go
+++ b/go-sdk/internal/sparse-merkle-tree/smt/merkletree_test.go
@@ -20,7 +20,6 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/hyperledger-labs/zeto/go-sdk/internal/sparse-merkle-tree/storage"
 	"github.com/hyperledger-labs/zeto/go-sdk/pkg/sparse-merkle-tree/core"
 	"github.com/stretchr/testify/assert"
 )
@@ -33,7 +32,7 @@ func (ms *mockStorage) GetRootNodeIndex() (core.NodeIndex, error) {
 	if ms.GetRootNodeIndex_customError {
 		return nil, fmt.Errorf("nasty error in get root")
 	}
-	return nil, storage.ErrNotFound
+	return nil, core.ErrNotFound
 }
 func (ms *mockStorage) UpsertRootNodeIndex(core.NodeIndex) error {
 	return fmt.Errorf("nasty error in upsert root")
diff --git a/go-sdk/internal/sparse-merkle-tree/storage/sql.go b/go-sdk/internal/sparse-merkle-tree/storage/sql.go
index 6c08182..73418f6 100644
--- a/go-sdk/internal/sparse-merkle-tree/storage/sql.go
+++ b/go-sdk/internal/sparse-merkle-tree/storage/sql.go
@@ -47,7 +47,7 @@ func (s *sqlStorage) GetRootNodeIndex() (core.NodeIndex, error) {
 	}
 	err := s.p.DB().Table(core.TreeRootsTable).First(&root).Error
 	if err == gorm.ErrRecordNotFound {
-		return nil, ErrNotFound
+		return nil, core.ErrNotFound
 	} else if err != nil {
 		return nil, err
 	}
@@ -121,7 +121,7 @@ func getNode(batchOrDb *gorm.DB, nodesTableName string, ref core.NodeIndex) (cor
 	}
 	err := batchOrDb.Table(nodesTableName).First(&n).Error
 	if err == gorm.ErrRecordNotFound {
-		return nil, ErrNotFound
+		return nil, core.ErrNotFound
 	} else if err != nil {
 		return nil, err
 	}
diff --git a/go-sdk/internal/sparse-merkle-tree/storage/errors.go b/go-sdk/pkg/sparse-merkle-tree/core/errors.go
similarity index 97%
rename from go-sdk/internal/sparse-merkle-tree/storage/errors.go
rename to go-sdk/pkg/sparse-merkle-tree/core/errors.go
index 379ed77..6e36ede 100644
--- a/go-sdk/internal/sparse-merkle-tree/storage/errors.go
+++ b/go-sdk/pkg/sparse-merkle-tree/core/errors.go
@@ -14,7 +14,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package storage
+package core
 
 import "errors"