I'll have to look into that. There's no readymade for #Manjaro so I'd have to compile it, assuming they make the source code available and it's up to date.
Discussion
I think it doesnt run in arch based distros, at least in arch linux it doesn't run, but it runs in debian based distros.
You can find more infos here: https://haveno.exchange/
I might have a look in the AUR tomorrow. It is possible to install deb packages on arch with debtap, but I always seemed to get that wrong so I'll see if someone has done it for me :)