diff --git a/indexer/balance_storage_handler.go b/indexer/balance_storage_handler.go
index 952753e..a7d768c 100644
--- a/indexer/balance_storage_handler.go
+++ b/indexer/balance_storage_handler.go
@@ -1,3 +1,17 @@
+// Copyright 2020 Coinbase, Inc.
+//
+// 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 indexer
 
 import (
diff --git a/indexer/balance_storage_helper.go b/indexer/balance_storage_helper.go
index fc1e0ca..c0445d9 100644
--- a/indexer/balance_storage_helper.go
+++ b/indexer/balance_storage_helper.go
@@ -1,3 +1,17 @@
+// Copyright 2020 Coinbase, Inc.
+//
+// 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 indexer
 
 import (
diff --git a/indexer/coin_storage_helper.go b/indexer/coin_storage_helper.go
index 90f407e..254e58b 100644
--- a/indexer/coin_storage_helper.go
+++ b/indexer/coin_storage_helper.go
@@ -1,3 +1,17 @@
+// Copyright 2020 Coinbase, Inc.
+//
+// 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 indexer
 
 import (
diff --git a/mocks/services/indexer.go b/mocks/services/indexer.go
index a3c4711..749dbec 100644
--- a/mocks/services/indexer.go
+++ b/mocks/services/indexer.go
@@ -17,6 +17,38 @@ type Indexer struct {
 	mock.Mock
 }
 
+// GetBalance provides a mock function with given fields: _a0, _a1, _a2, _a3
+func (_m *Indexer) GetBalance(_a0 context.Context, _a1 *types.AccountIdentifier, _a2 *types.Currency, _a3 *types.PartialBlockIdentifier) (*types.Amount, *types.BlockIdentifier, error) {
+	ret := _m.Called(_a0, _a1, _a2, _a3)
+
+	var r0 *types.Amount
+	if rf, ok := ret.Get(0).(func(context.Context, *types.AccountIdentifier, *types.Currency, *types.PartialBlockIdentifier) *types.Amount); ok {
+		r0 = rf(_a0, _a1, _a2, _a3)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Amount)
+		}
+	}
+
+	var r1 *types.BlockIdentifier
+	if rf, ok := ret.Get(1).(func(context.Context, *types.AccountIdentifier, *types.Currency, *types.PartialBlockIdentifier) *types.BlockIdentifier); ok {
+		r1 = rf(_a0, _a1, _a2, _a3)
+	} else {
+		if ret.Get(1) != nil {
+			r1 = ret.Get(1).(*types.BlockIdentifier)
+		}
+	}
+
+	var r2 error
+	if rf, ok := ret.Get(2).(func(context.Context, *types.AccountIdentifier, *types.Currency, *types.PartialBlockIdentifier) error); ok {
+		r2 = rf(_a0, _a1, _a2, _a3)
+	} else {
+		r2 = ret.Error(2)
+	}
+
+	return r0, r1, r2
+}
+
 // GetBlockLazy provides a mock function with given fields: _a0, _a1
 func (_m *Indexer) GetBlockLazy(_a0 context.Context, _a1 *types.PartialBlockIdentifier) (*types.BlockResponse, error) {
 	ret := _m.Called(_a0, _a1)