According to the filing, the transaction saw Binance sell back the 20 percent stake it held in FTX’s international unit and 18.4 percent in its US-based entity, which Bankman-Fried paid for using a mix of FTX and Binance-branded cryptocurrencies. The FTX estate alleges the share repurchase deal was conducted unlawfully because — following massive fraud by Bankman-Fried and other executives — FTX and its sister company Alameda were already insolvent at the time, and unable to fund the transaction.