Approve or reject Dokan marketplace vendors from Slack

Description

Quick overview
This workflow polls Dokan for newly registered vendors awaiting approval, posts each pending vendor to a Slack channel with Approve/Reject buttons, and updates the vendor’s status in Dokan when an admin clicks a button.

How it works
Runs every 15 minutes on a schedule.
Requests the list of Dokan stores with status=inactive from the Dokan REST API.
Deduplicates vendors already announced in previous runs and formats vendor details (profile link, contact info, address, and social links) for Slack.
Posts a Slack message for each new pending vendor with Approve, Reject, and View profile buttons.
When an admin clicks Approve or Reject in Slack, a token-protected webhook receives the request and verifies the shared token.
Updates the vendor status in Dokan to active (approve) or inactive (reject), posts a confirmation message to Slack, and returns an HTML response page to the button click.

Setup
Create a Dokan/WooCommerce Application Password (or equivalent Basic Auth) in your site for an admin-capable user and add it as HTTP Basic Auth credentials in the Dokan API request nodes.
Add Slack credentials for a bot token with chat:write and set YOUR_SLACK_CHANNEL_ID in the Slack message and confirmation steps.
Replace your-marketplace.com with your Dokan site URL in the Dokan API URLs and the Slack “View profile” button.
Replace your-n8n-instance.com in the Slack Approve/Reject button URLs and set a long random YOUR_APPROVAL_TOKEN to secure the approve/reject webhooks.