Get estimate on how much the swap will deduct

[ZmnSCPxj]

trafficstars

Presumably, since the swap involves onchain funds, onchain fees would be needed to complete the swap on the onchain side. It would be nice if the peerswap plugin could inform, say, if I wanted to get N satoshis onchain, how much onchain fee F do I need to pay?

[wtogami]

Note to self - This problem is really about price quote, user acceptance, how the UX should be, and how much of this should be automated.