persona webhooks events | sed 's/\b(.)/\u\1/g'

Overview

HMAC signature verification, inquiry.completed/approved/declined events, idempotent processing.

Prerequisites

• Completed persona-install-auth setup
• Valid Persona API key (sandbox or production)

Instructions

Step 1: Configure Webhook in Dashboard

1. Dashboard > Settings > Webhooks > Add Webhook
2. URL: https://your-app.com/webhooks/persona
3. Events: inquiry.completed, inquiry.approved, inquiry.declined,
           verification.passed, verification.failed
4. Copy the webhook secret for signature verification

Step 2: Webhook Endpoint with HMAC Verification

import express from 'express';
import crypto from 'crypto';

const app = express();

app.post('/webhooks/persona',
  express.raw({ type: 'application/json' }),
  async (req, res) => {
    const signature = req.headers['persona-signature'] as string;
    const secret = process.env.PERSONA_WEBHOOK_SECRET!;

    // Verify HMAC-SHA256 signature
    const expectedSig = crypto
      .createHmac('sha256', secret)
      .update(req.body)
      .digest('hex');

    if (!crypto.timingSafeEqual(Buffer.from(signature || ''), Buffer.from(expectedSig))) {
      return res.status(401).json({ error: 'Invalid signature' });
    }

    const event = JSON.parse(req.body.toString());
    await handlePersonaEvent(event);
    res.status(200).json({ received: true });
  }
);

Step 3: Event Handlers

async function handlePersonaEvent(event: any) {
  const { type, data } = event;

  switch (type) {
    case 'inquiry.completed':
      const inquiryId = data.attributes.payload.data.id;
      const referenceId = data.attributes.payload.data.attributes['reference-id'];
      console.log(`Inquiry completed: ${inquiryId} for user ${referenceId}`);
      // Update user KYC status in your database
      await updateUserKycStatus(referenceId, 'completed');
      break;

    case 'inquiry.approved':
      await updateUserKycStatus(data.attributes.payload.data.attributes['reference-id'], 'approved');
      break;

    case 'inquiry.declined':
      await updateUserKycStatus(data.attributes.payload.data.attributes['reference-id'], 'declined');
      break;

    case 'verification.passed':
      console.log(`Verification passed: ${data.attributes.payload.data.id}`);
      break;

    case 'verification.failed':
      console.log(`Verification failed: ${data.attributes.payload.data.id}`);
      break;

    default:
      console.log(`Unhandled event: ${type}`);
  }
}

Step 4: Idempotent Processing

const processedEvents = new Set<string>();

async function idempotentHandle(event: any) {
  const eventId = event.data.id;
  if (processedEvents.has(eventId)) {
    console.log(`Skipping duplicate: ${eventId}`);
    return;
  }
  await handlePersonaEvent(event);
  processedEvents.add(eventId);
}

Output

• Webhook endpoint with HMAC signature verification
• Event handlers for inquiry and verification lifecycle
• Idempotent processing preventing duplicates

Error Handling

Resources

• Webhooks Quickstart
• Create a Webhook

Next Steps

For common errors, see persona-common-errors.