(VDB-950) Write raw diffs before transforming

- Raw field we can reference by FK for related data
- Enables replay for unwatched or mistransformed diffs

pkg/fakes/mock_storage_diff_repository.go

@@ -0,0 +1,32 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package fakes
+
+import (
+	"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
+)
+
+type MockStorageDiffRepository struct {
+	CreatePassedInputs []utils.StorageDiffInput
+	CreateReturnID     int64
+	CreateReturnError  error
+}
+
+func (repository *MockStorageDiffRepository) CreateStorageDiff(input utils.StorageDiffInput) (int64, error) {
+	repository.CreatePassedInputs = append(repository.CreatePassedInputs, input)
+	return repository.CreateReturnID, repository.CreateReturnError
+}