Don't have Telegram yet? Try it now!
https://twitter.com/SatoshiLite/status/1094717083995144192
@SatoshiLite: The extension blocks concept is similar to sidechains. Think of this as a MimbleWimble sidechain that is attached to the main chain using consensus via a softfork upgrade. You can opt-in by sending coins into the MW extension blocks and also