What is the correct way to send VoIP Push using Node (Firebase Cloud Function)

[SirJAKfromSpace]

i'm using the @parse/node-apn npm package in my firebase cloud function to request for a push.

i seem to be getting 'notifs sent: 0 failed: 1' when printing results.sent and results.failed.
i'm pretty sure that the VoIP Token being used is the one produced by the voip_kit instance (i checked logs).
please can someone confirm whether I'm calling the APNs properly? any idea where the problem could be?

const options = {
    token: {                                    //  hidden for privacy
        key: __dirname + "/../AuthKey_SECRET_KEYID.p8",
        keyId: "SECRET_KEYID",
        teamId: "SECRET_TEAMID",
    },
    production: true,
};
const apnProvider = new apn.Provider(options);

export const apncallpush = functions.https.onRequest(async (req, res) => {
    const callerid = req.body.callerid;
    const callername = req.body.callername;
    const callertoken = req.body.calleetoken;

    const note = new apn.Notification();
    const deviceToken = `${callertoken}`
    note.payload = {
        "aps": {
            "alert": {
                "uuid": `f579cc8c-7127-4ca3-a9f5-dd4a591a2567`,
                "incoming_caller_id": `${callerid}`,
                "incoming_caller_name": `${callername}`,
            },
        },
    };
    note.contentAvailable = true;
    note.expiry = Math.floor(Date.now() / 1000) + 60;
    note.priority = 10;
    note.pushType = "voip";
    note.topic = "BUNDLE_ID.voip";    //  hidden for privacy

    apnProvider.send(note, deviceToken).then((result) => {
        const r = `DONE! notifs sent: ${result.sent.length} failed: ${result.failed.length}`;
        console.log(r);
    }).catch(() => {
        console.log('NOPE notif not sent');
    });

and i only have 1 iOS device not 2, so sadly i cant try out the example app.
i also tried the CURL command mentioned in the doc. it connects to api.sandbox.apple and my .pem certificate verifies OK.
finally it outputs:

* Connection state changed (MAX_CONCURRENT_STREAMS == 1000)!
* We are completely uploaded and fine
< HTTP/2 200 
< apns-id: A2ED1505-EE9D-CD19-955B-84669C7322A2
< 
* Connection #0 to host api.sandbox.push.apple.com left intact
* Closing connection 0

[masashi-sutou]

@SirJAKfromSpace

• Is the APNs endpoint and certificate of Sandbox correct?

Development server: api.sandbox.push.apple.com:443
Production server: api.push.apple.com:443
https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/sending_notification_requests_to_apns/

[mars3142]

I do have the same problem. The curl returns 200 and my app doesn't response to it.

Edit: After compiling in release mode, the push did open the calling ui.