Keeping an eye on the Hack Club Slack’s #counttoamillion channel.

You’ll need to create a Slack app (not a classic one) with at least the following bot token scopes. The reasons each scope is required are also included:

• channels:history (or groups:history, if it’s a private channel): Used to listen to messages sent.
• chat:write: Used for sending messages.
• reactions:write: For reacting to invalid messages.

Then you’ll need to subscribe the app to a few events. The server has an endpoint open at /slack/events, so when you’re asked for a request URL, just put https://<SERVER>/slack/events. Only the following events are needed:

• message.channels (or message.groups if it’s a private channel)

Here are all the variables you need to set up, with hints.

# The port to run the app server on
PORT=3000
# Redis database to store the last number and its sender
REDIS_URL=redis://…
# App config. Obtained from the "Basic Information" page of your app.
SLACK_BOT_TOKEN=xoxb-…
SLACK_VERIFICATION_TOKEN=xxxx…
# The channel where Jia should validate counted numbers in.
SLACK_CHANNEL_ID=C…

# Run it…
make

# …or build a binary and run that instead
make build
./bin/jia

After you’ve followed all the above steps, you should see something like this:

Starting Jia…
Listening on port 3000

MIT License