Create your webhook endpoint

import json

from flask import Flask, jsonify, request

app = Flask(__name__)

@app.route('/webhook', methods=['POST'])
def webhook():
    event = None
    payload = request.data
    try:
        event = json.loads(payload)
    except:
        return jsonify(success=False)
      
    # Add idempotency using the ORM being used by your app.

    # Handle the event
    if event and event['type'] == 'link.credentials_changed':
        link_id = event['data']['id']
        # Then define and call a method to handle the credentials changed event.
    elif event and event['type'] == 'link.refresh_intent.succeeded':
        link_id = event['data']['refreshed_object_id']
        # Then define and call a method to handle the link refreshed event.
    elif event and event['type'] == 'account.refresh_intent.succeeded':
        account_id = event['data']['refreshed_object_id']
        # Then define and call a method to handle the account refreshed event.
    # ... handle other event types
    else:
        # Unexpected event type
        print('Unhandled event type {}'.format(event['type']))
    return jsonify(success=True)

// This example uses Express to receive webhooks
const app = require('express')();

// Use body-parser to retrieve the raw body as a buffer
const bodyParser = require('body-parser');

app.post('/webhook', bodyParser.raw({type: 'application/json'}), (request, response) => {
  let event;
  try {
    event = JSON.parse(request.body);
  } catch (err) {
    return response.status(400).json({received: false});
  }

  // Add idempotency using the ORM being used by your app.

  // Handle the event
  switch (event.type) {
    case 'link.credentials_changed': {
      const linkId = event.data.id;
      // Define and call a method to handle the credentials changed event.
      break;
    }
    case 'link.refresh_intent.succeeded': {
      const linkId = event.data.refreshed_object_id;
      // Define and call a method to handle the link refreshed event.
      break;
    }
    case 'account.refresh_intent.succeeded': {
      const accountId = event.data.refreshed_object_id;
      // Define and call a method to handle the account refreshed event.
      break;
    }
    // ... handle other event types
    default:
      // Unexpected event type
      console.log(`Unhandled event type ${event.type}`);
  }

  // Return a response to acknowledge receipt of the event
  response.json({received: true});
});

app.listen(8000, () => console.log('Running on port 8000'));