Hello,
This depends on what wallet adapter you’re using.
If you are using the CoinPayments platform as a backend, then the lowest withdrawal fee you can charge is that charged by the CoinPayments platform.
You can set the withdrawal fee on the coin adapter to be equal to, or larger than the CP fee.
If it’s larger, then your site’s hot wallet balance gains the difference (Your site’s withdrawal fee minus the CP withdrawal fee). But there’s no way to charge less than what the platform allows.
If you choose to set up a Bitcoin core full node wallet, again, you’d first configure your fee settings in bitcoin.conf according to current network conditions. Then you’d set the coin adapter’s withdrawal fee to something equal to or larger than the mining fee charged on a typical transaction originating from your wallet. Hope this makes sense, let me know if you have questions on this.
with regards
