Gateway selection should consider VETTED gateways

[douglaz]

Perhaps related to #4722

But we already have https://github.com/fedimint/fedimint/blob/df4b7be8ec9a7907828331128e5abe4bf4ba8c59/docs/meta_fields/vetted_gateways.md?plain=1

So the client should filter based on it, if defined.

[maan2003]

@douglaz 🤷 it is reponsiblity of client integrator, is this issue for fedimint cli?

[douglaz]

@douglaz 🤷 it is reponsiblity of client integrator, is this issue for fedimint cli?

fedimint-cli is one example. If we can't rely on the client to implement it, then perhaps we should implement this policy server side?

[m1sterc001guy]

We used to have this logic when we had the active gateway, but while removing active gateway we had to remove it since there were difficulties querying the metadata #4427

[elsirion]

#4722 with a sane default will solve this. We don't want guardians to have too much say in gateway selection imo, it's a friendly hint, but a client/integrator can always choose otherwise.