bolt-js: app_home_opened event never fires handler

I’m afraid you haven’t enabled subscription of app_home_opened events yet.

Enabling App Home doesn’t automatically add app_home_opened subscription at https://api.slack.com/apps/{app id}/event-subscriptions for you.

I have the same issue now. App home events worked yesterday in my app, but the event doesn’t fire today. I’ve tried both through Socket Mode and through Http (ngrok) and ngrok doesn’t register any incoming traffic and the home page says " This is still a work in progress" - it probably times out after 3 seconds.

It looks like the event is not sent at all. For sanity, I’ve also check if node express app receives something, but no. Any request would show up in ngrok in the first place.

If you need info for debugging, I was expecting “app_home_opened” event sent to “https://df1e-185-186-152-216.eu.ngrok.io/slack/events” endpoint at 2023-01-23 19:47 UTC time.

=====EDIT======= Looks like the root cause was that I was missing “app_home_opened” scope in my Event Subscriptions -> Bot Events ^_^" I’m leaving this comment here, since someone may fall for the same issue.

@kroltan

as many, my end of year schedule is pretty busy

👋 I hope you’re having a wonderful time.

I’d like to suggest two things for this question.

1. Make sure if your endpoint receives requests from Slack

If you use ngrok, you can check the requests on its screen.

Having the following middleware in your Bolt app also may be helpful to check what requests came in.

app.use(args => {
  console.log(JSON.stringify(args.body, null, 2));
  args.next();
});

1. Remove ack function call

This is already mentioned above but ack function is not available in Events API listeners. For Events API, Bolt automatically acknowledges requests for you.

Sure! It’s copied straight from the doc example:

app.event("app_home_opened", async ({ context, event, say, ack }) => {
  ack();
  
  // check the message history if there was a prior interaction for this App DM
  const history = await app.client.im.history({
    token: context.botToken,
    channel: event.channel,
    count: 1 // we only need to check if >=1 messages exist
  });

  // if there was no prior interaction (= 0 messages),
  // it's save to send a welcome message
  if (!history.messages.length) {
    say("Hia");
  }
});

But even a simpler one like below is never invoked.

app.event("app_home_opened", async ({ ack }) => {
  ack();
  console.log("Blah");
});