I have a similar problem on my iPhone. I have it set to silent ring at all times, and I have extensions like NoMoRobo installed to defend against known bad acto

I have a similar problem on my iPhone. I have it set to silent ring at all times, and I have extensions like NoMoRobo installed to defend against known bad actors, but I would much prefer a whitelist solution. Now that Twilio is doing a beta test of their version of Functions/Serverless, I've been thinking I might be able to write my own whitelist-only phone service. Problem is, how do I get the approved calls from Twilio back to my iPhone? And how do I do that without exposing that method to robocallers?