RT @Alex_Amsel: Rootstock whitepaper is out. #ethereum style smart contracts on #bitcoin? https://uploads.strikinglycdn.com/files/90847694-70f0-4668-ba7f-dd0c6b0b00a1/RootstockWhitePaperv9-Overview.pdf
Source
https://twitter.com/danielmcclure/status/674009915510296577