Toobit perpetual contracts only support trading with USDT, so the fee can only be deducted with USDT
Example: A user places a sell short market order of 0.5 BTC at the market price of 25,000 USDT in the BTC/USDT perpetual contract, and then sets a limit buy long order of 0.4 BTC at 22,000 USDT, so the user's fee is calculated as follows.
The fee for selling short: 25000 * 0.5 * 0.06% = 7.5 USDT
Buy long fee: 22000 * 0.4 * 0.06% = 5.28 USDT
Maker：0.06%
Taker：0.06%