status-im/status-go

package pairing

import (
    "github.com/status-im/status-go/protocol"
    "github.com/status-im/status-go/protocol/encryption/multidevice"
)

func GetMessengerInstallationsMap(m *protocol.Messenger) map[string]struct{} {
    ids := map[string]struct{}{}
    for _, installation := range m.Installations() {
        ids[installation.ID] = struct{}{}
    }
    return ids
}

func FindNewInstallations(m *protocol.Messenger, prevInstallationIds map[string]struct{}) *multidevice.Installation {
    for _, installation := range m.Installations() {
        if _, ok := prevInstallationIds[installation.ID]; !ok {
            return installation
        }
    }
    return nil
}