A Dutch company called LegalThings, whose primary business is creating digital legal contracts, last week launched beta testing of an app called LegalFling that promises to be “the first blockchain-based app to verify explicit consent before having sex.”

LegalThings co-founder Arnold Daniels says the app is meant to provide a solution that’s less black-and-white than Sweden’s proposed law, which stipulates that sex without clearly worded or demonstrated consent is rape.

“Just saying ‘yes’ really isn’t enough,” Daniels says. “You want to set a really clear set of boundaries.” For instance, he says the app would help clarify a situation where, say, one party consents to sex, but not to having nude photos of themselves taken.