wup2slack (POC)

WhatsApp Business Platform to Slack message forwarding.

1. Create a WhatsApp Business Platform App

https://developers.facebook.com/docs/whatsapp/cloud-api/get-started

2. Create a Slack app and install it in your workspace

https://api.slack.com/apps?new_app=1

3. Update app.yml and deploy code to Google cloud App Engine

gcloud app deploy

4. Register your App Engine url as webhook for Whatsapp

https://<your app egine url>/whatsapp/webhook

Don't forget to subscribe to "messages" callbacks (or subscribe to all callbacks).

5. Register your App Engine url as event lister for Slack events

https://<your app egine url>/slack/webhook

Configure Request URL and subscribe to message.channels bot event.

6. Send a whatsapp message to your Whatsapp Business Platform number. Reply from Slack.