Citing potential violation of state consumer-protection law, the New Jersey Attorney General’s Office has subpoenaed a 19-year-old Massachusetts Institute of Technology student who developed a program allowing Internet users to visit websites with no advertising in exchange for Bitcoin credits.

The document subpoena asks Jeremy Rubin, who wrote the application—dubbed Tidbit—for a programming competition last November, to turn over its source code. The state also issued 27 interrogatories, asking how the program works and about other people who may have been involved.