How to use the @keepkey/device-protocol/lib/messages_pb.CipherKeyValue function in @keepkey/device-protocol

public async cipherKeyValue(
    v: Messages.CipherKeyValue.AsObject
  ): Promise {
    // if(val.length % 16 !== 0) val = val.concat() TODO THIS
    const cipherKeyValue = new Messages.CipherKeyValue()
    cipherKeyValue.setAddressNList(v.addressNList)
    cipherKeyValue.setKey(v.key)
    cipherKeyValue.setValue(v.value)
    cipherKeyValue.setEncrypt(v.encrypt)
    cipherKeyValue.setAskOnEncrypt(v.askOnEncrypt || false)
    cipherKeyValue.setAskOnDecrypt(v.askOnDecrypt || false)
    cipherKeyValue.setIv(v.iv || '')
    const response = await this.transport.call(Messages.MessageType.MESSAGETYPE_CIPHERKEYVALUE, cipherKeyValue) as Event
    if(response.message_type === Events.FAILURE) throw event
    const ckv = response.message as Messages.CipheredKeyValue
    return ckv.getValue()
  }