Ask HN: How do you handle peer-to-peer discovery on iOS without a server?

Good call, I've looked at Meshtastic's approach. They use CoreBluetooth on iOS with a known GATT service UUID for discovery, which is basically what I'm doing now. The main difference is they're discovering LoRa radios (which have fixed BLE addresses) rather than other phones. Phone-to-phone is trickier because iOS rotates the BLE address every ~15 minutes for privacy, so you can't really rely on address-based reconnection. You end up needing to encode enough identity into the GATT characteristics that peers can re-identify each other after an address rotation. Curious to see if anyone's found a cleaner approach for that.