MIT MAS.S62 Cryptocurrency Engineering and Design, Spring 2018 Instructor: Tadge Dryja View the complete course: https://ocw.mit.edu/MAS-S62S18 YouTube Playlist:    • MIT MAS.S62 Cryptocurrency Engineerin...   Types of payment channels, including unidirectional, decreasing time and lightning channels are covered. License: Creative Commons BY-NC-SA More information at https://ocw.mit.edu/terms More courses at https://ocw.mit.edu/