I have 43usdt in trust wallet. When i request transfer 30 usdt from trust wallet to bitforex usdt- ERC20, the fee posted it $8.91, which make the total out of my trust wallet $38.93. I believe the 43usdt could cover that.
But i got the message saying that i dont have enough eth to cover fee.
I dont understand why the fee is in eth but not usdt. Please advise for a solution. Thank you.