Revised Exchange model for comment
https://docs.google.com/document/d/1UkNwicYo2JjeChcXAlvlVPz2gFlZDr9KYJP_GBKGOo8/edit?usp=sharing
Comment here or on the doc?
https://docs.google.com/document/d/1UkNwicYo2JjeChcXAlvlVPz2gFlZDr9KYJP_GBKGOo8/edit?usp=sharing
Comment here or on the doc?