Assign node a point value

I'll give an example for what I'm trying to do: When I create an event node, I'd like to assign the event a point value. When someone attends the event, I'd like an administrator to give that user the points the event was valued.

I can do this easily with the points interface by typing the event point value manually, but I'd like them to just select the node so it automatically gives them the assigned points. Advantages would be to reduce any input errors and have a record of which events the user attended.

I looked through the contrib modules but didn't see anything that worked this way, does anyone know of a solution?