The former CEO of the failed cryptocurrency exchange FTX said in a tweet Friday that he is willing to testify to Congress next week, but that he will be limited in what he can say and that he “won’t be as helpful” as he’d like to be.

The tweet came in response to several this month from Rep. Maxine Waters, D-Calif., and the House Financial Services Committee chair, who had requested that Sam Bankman-Fried attend next week’s hearings over the collapse of FTX.

In a series of tweets, Bankman-Fried listed specific issues he would be able to discuss with the committee, including the solvency of FTX’s U.S. business, its American customers and possible solutions for returning assets to international clients.