This repository contains the code implementation for creating a Slack app using the Bolt framework for JavaScript and implemented in an Express app.
The code is part of a blog post titled "A Comprehensive Guide to Creating Your Own Slack App". To check out the full blog post, go to https://docs.google.com/document/d/1GbNsH-7h7qSfjNi-hHRXSHvMMoyBLJw76jZUCB04Bgs/edit.
To install the dependencies, run the following command:
npm install
Before running the app, you need to set up a few environment variables. You can get these values by navigating to your app's BASIC INFORMATION Page.
SLACK_SIGNING_SECRET=<YOUR_SLACK_APP_SIGNING_SECRET>
SLACK_CLIENT_ID=<YOUR_SLACK_APP_CLIENT_ID>
SLACK_CLIENT_SECRET=<YOUR_SLACK_APP_CLIENT_ID>
To start the app, run the following command:
npm run start
This will start the app on port 3000. To access the app on an external network, you need to use ngrok to create a redirect url for OAuth and a request url for events.
.\ngrok http 3000
This will output a forwarding address for http and https. Take note of the https one. It should look something like the following:
Forwarding https://a66e-2401-4900-1c5c-d73-98d6-8a8a-2aa1-2fb8.in.ngrok.io -> http://localhost:3000
Next, go to your app on https://api.slack.com/apps and navigate to your app's OAuth & Permissions page. Under Redirect URLs, add your ngrok forwarding address with the /slack/oauth_redirect path appended, like this:
https://a66e-2401-4900-1c5c-d73-98d6-8a8a-2aa1-2fb8.in.ngrok.io/slack/oauth_redirect
Make sure to change the redirectUri in the express receiver located inside index.js to the new ngrok URL as well.
redirectUri:
"https://a66e-2401-4900-1c5c-d73-98d6-8a8a-2aa1-2fb8.in.ngrok.io/slack/oauth_redirect",
Now go to Event Subscriptions and enable events. For the Request URL, pass your ngrok forwarding address with the /slack/events path appended, like this:
https://a66e-2401-4900-1c5c-d73-98d6-8a8a-2aa1-2fb8.in.ngrok.io/slack/events
Repeat the same process for other commands and interactivity.
I hope that helps!