2.Enable Monero and Ethereum deposits and withdrawals. When you enter your private key you will see your Note balance in BTC, XMR and ETH.
Using Monero should be fine since it is privacy coin by default, and it has nice volume on Bisq exchange, but I see no reason in using ethereum and similar shitcoin.
Enable internal 'bridging' between BTC, XMR and ETH for a fee. You will be able to deposit ETH on your Whirlwind Note, change it internally to BTC and withdraw it to your on-chain address.
Wouldn't this be categorized as centralized exchange?
We already have options or that, and you could get in (bigger) trouble for doing that.
There will be no 3rd party involved in the bridging process, we will provide the liquidity on all 3 chains and rebalance it when needed.
That can open whole new can of worms and you should expect much more complications, support questions and complains, if you decide to implement this change.
I would be careful with this, since attack vector is getting bigger also, as well as chance for more bugs is code.l