When users swap their tokens to the BEP20 equivalents on Binance Smart Chain, they also need to get some BNB to pay for gas.
The destination network has to be Binance Smart Chain
The token is a popular BToken, such as BTC, ETH, USDT, BUSD
The total of your swap order has to be greater than 2BNB
There are 3 options: 0.5 BNB, 1BNB and 2 BNB
The network fee should be the sum of the fee for swapping assets and the fee for purchasing BNB on your behalf.
The actual amount of network fee you have to pay is network fee*(1-discount). When the discount is 100%, the network fee is free.
Received token = Input amount - network fee - cost to buy BNB