Cryptocurrency exchange Binance reportedly helped create the code behind the stablecoin issued by World Liberty Financial (WLF), one of the crypto businesses tied to US President Donald Trump.

According to a Friday Bloomberg report citing three people familiar with the matter, Binance helped create, promote, and played a role in the largest transaction of WLF’s USD1 stablecoin. The crypto business, backed by Trump and his three sons, launched USD1 on March 4. 

An Abu Dhabi-based investment firm, MGX, announced a $2-billion investment in Binance on March 12 using a then-unnamed stablecoin. Eric Trump, one of WLF’s co-founders, said in May that the company would be using USD1 to settle the investment.

According to Bloomberg, 90% of all the USD1 coins used in the transaction remained in Binance’s wallets as of Friday, potentially generating tens of millions of dollars in interest for Trump and his family.