Is it possible for me to choose which one to be sent when I zap ?
Also what is a dust limit ?

Heisenbergbitcoin

yeah, yeah, read the small print. "we can change terms and conditions at any time without your approval" bla bla bla

SwapMarket

When are sats and when are credits used for zaps?

If the sender and receiver both have wallets attached, the zap exceeds both of their dust limits, and we can predict a successful route with a reasonable fee, the zap prioritizes using the attached wallets and real sats.

If either the sender or receiver don't have wallets attached, the zap is below either of their dust limits, or the route to the receiver is too expensive, the zap prioritizes using credits.

bitcoin

I don't want Cowboy Credits

987654321

> **When are sats and when are credits used for zaps?**
>
> If the sender and receiver both have wallets attached, the zap exceeds both of their dust limits, and we can predict a successful route with a reasonable fee, the zap prioritizes using the attached wallets and real sats.
If either the sender or receiver don't have wallets attached, the zap is below either of their dust limits, or the route to the receiver is too expensive, the zap prioritizes using credits.

— https://stacker.news/items/835465