coscup-matterbot says to #coscup <EasonC13> https://docs.google.com/presentation/d/14C7r7oAjC_JpCYSRMUs7c4i3WiMDHMvng6jyPh25vtQ/edit?usp=sharing (re @Sorry: 請問「零知識證明」的議程講者有釋出投影片嗎？)