Are you asking if you are liable?
Do you mean that you opened the car door into the path of an oncoming vehicle?
I need the information I asked for?
If the accident was caused when you opened a car door into the path of an ongoing car then you are liable. There is no way around it.
You could try to argue that there should be a reduction for contributory negligence because they were unable to stop but it is fair to say it is probably not worth litigating over.
Your insurance will deal with it although it is probably in your interests to try to settle.
Can I clarify anything for you?