diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/utils.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/utils.go
new file mode 100644
index 0000000..fe3a017
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/utils.go
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020-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 events
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/opencord/voltha-protos/v4/go/voltha"
+)
+
+type ContextType string
+
+const (
+	// ContextAdminState is for the admin state of the Device in the context of the event
+	ContextAdminState ContextType = "admin-state"
+	// ContextConnectState is for the connect state of the Device in the context of the event
+	ContextConnectState ContextType = "connect-state"
+	// ContextOperState is for the operational state of the Device in the context of the event
+	ContextOperState ContextType = "oper-state"
+	// ContextPrevdminState is for the previous admin state of the Device in the context of the event
+	ContextPrevAdminState ContextType = "prev-admin-state"
+	// ContextPrevConnectState is for the previous connect state of the Device in the context of the event
+	ContextPrevConnectState ContextType = "prev-connect-state"
+	// ContextPrevOperState is for the previous operational state of the Device in the context of the event
+	ContextPrevOperState ContextType = "prev-oper-state"
+	// ContextDeviceID is for the previous operational state of the Device in the context of the event
+	ContextDeviceID ContextType = "id"
+	// ContextParentID is for the parent id in the context of the event
+	ContextParentID ContextType = "parent-id"
+	// ContextSerialNumber is for the serial number of the Device in the context of the event
+	ContextSerialNumber ContextType = "serial-number"
+	// ContextIsRoot is for the root flag of Device in the context of the event
+	ContextIsRoot ContextType = "is-root"
+	// ContextParentPort is for the parent interface id of child in the context of the event
+	ContextParentPort ContextType = "parent-port"
+)
+
+type EventName string
+
+const (
+	DeviceStateChangeEvent EventName = "DEVICE_STATE_CHANGE"
+)
+
+type EventAction string
+
+const (
+	Raise EventAction = "RAISE_EVENT"
+	Clear EventAction = "CLEAR_EVENT"
+)
+
+//CreateDeviceStateChangeEvent forms and returns a new DeviceStateChange Event
+func CreateDeviceStateChangeEvent(serialNumber string, deviceID string, parentID string,
+	prevOperStatus voltha.OperStatus_Types, prevConnStatus voltha.ConnectStatus_Types, prevAdminStatus voltha.AdminState_Types,
+	operStatus voltha.OperStatus_Types, connStatus voltha.ConnectStatus_Types, adminStatus voltha.AdminState_Types,
+	parentPort uint32, isRoot bool) *voltha.DeviceEvent {
+
+	context := make(map[string]string)
+	/* Populating event context */
+	context[string(ContextSerialNumber)] = serialNumber
+	context[string(ContextDeviceID)] = deviceID
+	context[string(ContextParentID)] = parentID
+	context[string(ContextPrevOperState)] = prevOperStatus.String()
+	context[string(ContextPrevConnectState)] = prevConnStatus.String()
+	context[string(ContextPrevAdminState)] = prevAdminStatus.String()
+	context[string(ContextOperState)] = operStatus.String()
+	context[string(ContextConnectState)] = connStatus.String()
+	context[string(ContextAdminState)] = adminStatus.String()
+	context[string(ContextIsRoot)] = strconv.FormatBool(isRoot)
+	context[string(ContextParentPort)] = strconv.FormatUint(uint64(parentPort), 10)
+
+	return &voltha.DeviceEvent{
+		Context:         context,
+		ResourceId:      deviceID,
+		DeviceEventName: fmt.Sprintf("%s_%s", string(DeviceStateChangeEvent), string(Raise)),
+	}
+}