diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/iAdapter.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/iAdapter.go
new file mode 100644
index 0000000..b106d52
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/iAdapter.go
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * 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 adapters
+
+import (
+	"context"
+	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
+	"github.com/opencord/voltha-protos/v4/go/openflow_13"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
+)
+
+//IAdapter represents the set of APIs a voltha adapter has to support.
+type IAdapter interface {
+	Adapter_descriptor(ctx context.Context) error
+	Device_types(ctx context.Context) (*voltha.DeviceTypes, error)
+	Health(ctx context.Context) (*voltha.HealthStatus, error)
+	Adopt_device(ctx context.Context, device *voltha.Device) error
+	Reconcile_device(ctx context.Context, device *voltha.Device) error
+	Abandon_device(ctx context.Context, device *voltha.Device) error
+	Disable_device(ctx context.Context, device *voltha.Device) error
+	Reenable_device(ctx context.Context, device *voltha.Device) error
+	Reboot_device(ctx context.Context, device *voltha.Device) error
+	Self_test_device(ctx context.Context, device *voltha.Device) error
+	Delete_device(ctx context.Context, device *voltha.Device) error
+	Get_device_details(ctx context.Context, device *voltha.Device) error
+	Update_flows_bulk(ctx context.Context, device *voltha.Device, flows *voltha.Flows, groups *voltha.FlowGroups, flowMetadata *voltha.FlowMetadata) error
+	Update_flows_incrementally(ctx context.Context, device *voltha.Device, flows *openflow_13.FlowChanges, groups *openflow_13.FlowGroupChanges, flowMetadata *voltha.FlowMetadata) error
+	Update_pm_config(ctx context.Context, device *voltha.Device, pm_configs *voltha.PmConfigs) error
+	Receive_packet_out(ctx context.Context, deviceId string, egress_port_no int, msg *openflow_13.OfpPacketOut) error
+	Suppress_event(ctx context.Context, filter *voltha.EventFilter) error
+	Unsuppress_event(ctx context.Context, filter *voltha.EventFilter) error
+	Get_ofp_device_info(ctx context.Context, device *voltha.Device) (*ic.SwitchCapability, error)
+	Process_inter_adapter_message(ctx context.Context, msg *ic.InterAdapterMessage) error
+	Download_image(ctx context.Context, device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Get_image_download_status(ctx context.Context, device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Cancel_image_download(ctx context.Context, device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Activate_image_update(ctx context.Context, device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Revert_image_update(ctx context.Context, device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Enable_port(ctx context.Context, deviceId string, port *voltha.Port) error
+	Disable_port(ctx context.Context, deviceId string, port *voltha.Port) error
+	Child_device_lost(ctx context.Context, parentDeviceId string, parentPortNo uint32, onuID uint32) error
+	Start_omci_test(ctx context.Context, device *voltha.Device, request *voltha.OmciTestRequest) (*voltha.TestResponse, error)
+	Get_ext_value(ctx context.Context, deviceId string, device *voltha.Device, valueflag voltha.ValueType_Type) (*voltha.ReturnValues, error)
+}