diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif/core_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif/core_proxy_if.go
new file mode 100644
index 0000000..36939bd
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif/core_proxy_if.go
@@ -0,0 +1,52 @@
+/*
+ * 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 adapterif
+
+import (
+	"context"
+
+	"github.com/opencord/voltha-protos/v4/go/voltha"
+)
+
+// CoreProxy interface for voltha-go coreproxy.
+type CoreProxy interface {
+	UpdateCoreReference(deviceID string, coreReference string)
+	DeleteCoreReference(deviceID string)
+	RegisterAdapter(ctx context.Context, adapter *voltha.Adapter, deviceTypes *voltha.DeviceTypes) error
+	DeviceUpdate(ctx context.Context, device *voltha.Device) error
+	PortCreated(ctx context.Context, deviceID string, port *voltha.Port) error
+	PortsStateUpdate(ctx context.Context, deviceID string, portTypeFilter uint32, operStatus voltha.OperStatus_Types) error
+	DeleteAllPorts(ctx context.Context, deviceID string) error
+	GetDevicePort(ctx context.Context, deviceID string, portNo uint32) (*voltha.Port, error)
+	ListDevicePorts(ctx context.Context, deviceID string) ([]*voltha.Port, error)
+	DeviceStateUpdate(ctx context.Context, deviceID string,
+		connStatus voltha.ConnectStatus_Types, operStatus voltha.OperStatus_Types) error
+
+	DevicePMConfigUpdate(ctx context.Context, pmConfigs *voltha.PmConfigs) error
+	ChildDeviceDetected(ctx context.Context, parentDeviceID string, parentPortNo int,
+		childDeviceType string, channelID int, vendorID string, serialNumber string, onuID int64) (*voltha.Device, error)
+
+	ChildDevicesLost(ctx context.Context, parentDeviceID string) error
+	ChildDevicesDetected(ctx context.Context, parentDeviceID string) error
+	GetDevice(ctx context.Context, parentDeviceID string, deviceID string) (*voltha.Device, error)
+	GetChildDevice(ctx context.Context, parentDeviceID string, kwargs map[string]interface{}) (*voltha.Device, error)
+	GetChildDevices(ctx context.Context, parentDeviceID string) (*voltha.Devices, error)
+	SendPacketIn(ctx context.Context, deviceID string, port uint32, pktPayload []byte) error
+	DeviceReasonUpdate(ctx context.Context, deviceID string, deviceReason string) error
+	PortStateUpdate(ctx context.Context, deviceID string, pType voltha.Port_PortType, portNo uint32,
+		operStatus voltha.OperStatus_Types) error
+}