diff --git a/libraries/shared/fetcher/storage_fetcher.go b/libraries/shared/fetcher/csv_tail_storage_fetcher.go
similarity index 93%
rename from libraries/shared/fetcher/storage_fetcher.go
rename to libraries/shared/fetcher/csv_tail_storage_fetcher.go
index 48960dcf..97b2c0e3 100644
--- a/libraries/shared/fetcher/storage_fetcher.go
+++ b/libraries/shared/fetcher/csv_tail_storage_fetcher.go
@@ -25,10 +25,6 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/fs"
 )
 
-type IStorageFetcher interface {
-	FetchStorageDiffs(chan<- utils.StorageDiffRow, chan<- error)
-}
-
 type CsvTailStorageFetcher struct {
 	tailer fs.Tailer
 }
diff --git a/libraries/shared/fetcher/storage_fetcher_test.go b/libraries/shared/fetcher/csv_tail_storage_fetcher_test.go
similarity index 100%
rename from libraries/shared/fetcher/storage_fetcher_test.go
rename to libraries/shared/fetcher/csv_tail_storage_fetcher_test.go
diff --git a/libraries/shared/fetcher/storage_fetcher_interface.go b/libraries/shared/fetcher/storage_fetcher_interface.go
new file mode 100644
index 00000000..1cdce2c8
--- /dev/null
+++ b/libraries/shared/fetcher/storage_fetcher_interface.go
@@ -0,0 +1,21 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fetcher
+
+import "github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
+
+type IStorageFetcher interface {
+	FetchStorageDiffs(out chan<- utils.StorageDiffRow, errs chan<- error)
+}