The FTX estate alleges that the share repurchase was funded by FTX's Alameda Research division through a combination of the company's and Binance's exchange tokens, as well as Binance's dollar-pegged stablecoin.

"Alameda was insolvent at the time of the share repurchase and could not afford to fund the transaction," the suit claims, labeling the deal agreed with FTX co-founder Sam Bankman-Fried — who's now serving a 25-year sentence over fraud linked to the downfall of his exchange — a "constructive fraudulent transfer."