Quick Guide to Implementing Webhooks in Wave

Hey there, fellow Javascript devs! Ready to supercharge your Wave integrations with webhooks? Let's dive right in and get those real-time updates flowing.

Introduction

Webhooks are the secret sauce for keeping your app in sync with Wave. They're like having a personal assistant who taps you on the shoulder whenever something interesting happens. With the Wave API, setting up these digital nudges is a breeze.

Prerequisites

Before we start cooking, make sure you've got these ingredients:

• Wave API credentials (your golden ticket)
• A Node.js environment (your kitchen)
• A dash of Express.js knowledge (for serving up webhook goodness)

Got all that? Great! Let's roll up our sleeves and get to work.

Setting Up Webhook Endpoint

First things first, we need a place for Wave to send those juicy updates. Here's a quick Express server to get you started:

const express = require('express');
const app = express();
app.use(express.json());

app.post('/webhook', (req, res) => {
  console.log('Webhook received:', req.body);
  res.sendStatus(200);
});

app.listen(3000, () => console.log('Webhook server running on port 3000'));

This little server is now ready to catch any webhooks Wave throws at it. The payload will be a JSON object packed with all the details you need.

Registering a Webhook with Wave API

Now that we've got our catcher's mitt ready, let's tell Wave where to throw. Here's how you register a webhook using the Wave API:

const axios = require('axios');

async function registerWebhook() {
  try {
    const response = await axios.post('https://api.waveapps.com/webhooks/v1/create', {
      url: 'https://your-domain.com/webhook',
      event_types: ['invoice.created', 'payment.created'],
      client_id: 'your_client_id',
      client_secret: 'your_client_secret'
    });
    console.log('Webhook registered:', response.data);
  } catch (error) {
    console.error('Error registering webhook:', error);
  }
}

registerWebhook();

Just swap out the URL, event types, and credentials with your own, and you're good to go!

Handling Webhook Events

When those webhooks start rolling in, you'll want to do something useful with them. Here's a simple example:

app.post('/webhook', (req, res) => {
  const { event_type, payload } = req.body;
  
  switch(event_type) {
    case 'invoice.created':
      console.log('New invoice created:', payload.invoice.id);
      // Update your local database, notify the user, etc.
      break;
    case 'payment.created':
      console.log('New payment received:', payload.payment.amount);
      // Update account balance, send a thank you email, etc.
      break;
  }
  
  res.sendStatus(200);
});

Security Considerations

Don't forget to lock your digital doors! Wave sends a signature with each webhook. Here's how to verify it:

const crypto = require('crypto');

function verifySignature(payload, signature, secret) {
  const hmac = crypto.createHmac('sha256', secret);
  const digest = hmac.update(JSON.stringify(payload)).digest('hex');
  return signature === digest;
}

app.post('/webhook', (req, res) => {
  const signature = req.headers['x-wave-signature'];
  if (!verifySignature(req.body, signature, 'your_webhook_secret')) {
    return res.sendStatus(401);
  }
  // Process the webhook...
});

Error Handling and Retry Logic

Sometimes things go wrong. Be a good neighbor and handle failed deliveries gracefully:

app.post('/webhook', async (req, res) => {
  try {
    await processWebhook(req.body);
    res.sendStatus(200);
  } catch (error) {
    console.error('Error processing webhook:', error);
    res.sendStatus(500); // Wave will retry later
  }
});

Testing Webhooks

Want to make sure everything's working without waiting for real events? Wave's got your back with their testing tools. But you can also whip up a quick local test:

const testPayload = {
  event_type: 'invoice.created',
  payload: { invoice: { id: 'test123' } }
};

axios.post('http://localhost:3000/webhook', testPayload)
  .then(() => console.log('Test webhook sent successfully'))
  .catch(error => console.error('Error sending test webhook:', error));

Monitoring and Debugging

Keep an eye on your webhooks like a hawk. Log everything, set up alerts for failures, and don't be shy about reaching out to Wave's support if something looks fishy.

Conclusion

And there you have it, folks! You're now armed and ready to implement webhooks in your Wave integration. Remember, webhooks are your friends – treat them well, and they'll keep your app up-to-date and your users happy.

Happy coding, and may your webhooks always find their mark!