diff --git a/db/migrations/00033_create_ipfs_blocks_table.sql b/db/migrations/00033_create_ipfs_blocks_table.sql
new file mode 100644
index 00000000..03a99488
--- /dev/null
+++ b/db/migrations/00033_create_ipfs_blocks_table.sql
@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE public.blocks (
+  key TEXT UNIQUE NOT NULL,
+  data BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE public.blocks;
diff --git a/libraries/shared/transformer/seed_node_transformer.go b/libraries/shared/transformer/seed_node_transformer.go
new file mode 100644
index 00000000..bc9beb01
--- /dev/null
+++ b/libraries/shared/transformer/seed_node_transformer.go
@@ -0,0 +1,31 @@
+// 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 transformer
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/config"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type SeedNodeTransformer interface {
+	Init() error
+	Execute() error
+	GetConfig() config.Subscription
+}
+
+type SeedNodeTransformerInitializer func(db *postgres.DB, subCon config.Subscription, client core.RpcClient) SeedNodeTransformer
diff --git a/pkg/config/subscription.go b/pkg/config/subscription.go
index 50949c9b..2aea5d06 100644
--- a/pkg/config/subscription.go
+++ b/pkg/config/subscription.go
@@ -1,3 +1,19 @@
+// 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 config
 
 // Subscription config is used by a subscribing transformer to specifiy which data to receive from the seed node
diff --git a/pkg/config/subscription_test.go b/pkg/config/subscription_test.go
deleted file mode 100644
index d912156b..00000000
--- a/pkg/config/subscription_test.go
+++ /dev/null
@@ -1 +0,0 @@
-package config