[FEATURE] Get network fee

[dantebarba]

Is your feature request related to a problem? Please describe.

I'd like to get the network fee from Binance. It usually varies and I don't have a way to calculate it in real time.

Describe the solution you'd like

Something like =BINANCE("fees"; "BUSD";"BEP20") would give you the current BEP20 fee or BINANCE("fees"; "ETH"; "ERC20") the current Eth gas fee from binance.

Describe alternatives you've considered

Using another service that could provide me these values (didn't find one though)

[dantebarba]

Here is the data:https://www.binance.com/en/fee/cryptoFee but not sure if it's in the API