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Overview

The Node.js SDK enables seamless integration of Flock referral and rewards into your backend services. Effortlessly build powerful referral programs, track customer engagement, and manage rewards programmatically.
  • Identify and manage customers
  • Ingest checkpoints to trigger rewards at key milestones
  • Webhook event verification
  • Fetch live campaigns
  • Create and manage referrals
  • Officially supported by the Flock team

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Installation

Install the SDK using npm or yarn: 
# Using npm
npm install @wflock/node-flock

# Using yarn
yarn add @wflock/node-flock

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Quick Start

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Initialize the SDK

import { FlockSDK } from '@wflock/node-flock';

// Initialize with your service access key
const sdk = new FlockSDK({
  accessKey: 'your-service-access-key', // Get this from the Flock dashboard
});
Your service access key should be kept secure and never exposed in client-side code. This SDK is designed for server-side use only.

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Core Features

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1. Ingest Checkpoints

Trigger checkpoints to record key milestones in your user journey and/or trigger rewards. See Checkpoints for more details. 
// Ingest a checkpoint
await sdk.checkpoints.ingest('purchase_completed', {
  externalUserId: 'user_123',   // The user ID in your system
  environment: 'production',    // or 'test'
});

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2. Customer Management

Identify customers 
// Identify a customer
const customer = await sdk.customers.identify({
  externalUserId: 'external_user_123',      // The user ID in your system
  email: 'user@example.com',
  name: 'Jane Doe',
  customProperties: {                    // Optional custom properties
    plan: 'premium',
    signupDate: '2025-01-15'
  }
});
Checkpoints are the recommended way to trigger rewards. Configure which checkpoints trigger rewards in the Flock dashboard.

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3. Campaign Management

Fetch live campaign details. 
// Get live campaign for an environment
const campaign = await sdk.campaigns.getLive({
  environment: 'production', // or 'test'
  customerId: 'customer_123' // This is Flock internal ID that you get after calling the identify method
});

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4. Referral Management

Sometimes, you may want to validate and create a referral from your backend. 

// Validate a referral code
const validation = await sdk.referrals.validate('JANE123');

if (validation.isValid) {
  console.log('Valid referral code from:', validation.referredBy);
  // Create a referral
  const referral = await sdk.referrals.create({
    campaignId: 'campaign_123',
    referralCode: 'JANE123',
    refereeId: 'customer_123' // This is Flock internal ID that you get after calling the identify method
  });
}

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5. Webhook Verification

Verify webhook events sent from Flock to ensure they are legitimate and secure: 
// Express.js route handler example
app.post('/webhooks/flock', (req, res) => {
  try {
    // Get the signature from the headers
    const signature = req.headers['x-flock-signature'];

    if (!signature) {
      return res.status(401).json({ error: 'Missing signature header' });
    }

    // Validate and construct the webhook event
    const event = sdk.webhooks.constructEvent({
      secret: 'your_webhook_secret', // Get this from the Flock dashboard
      signature,
      payload: req.body,
      maxAge: 5 * 60 * 1000, // Optional: 5 minutes in milliseconds
    });

    // Handle the event based on its type
    switch (event.name) {
      case 'invitee.accepted':
        console.log(`Invitee ${event.data.invitee.id} accepted an invitation`);
        // Process the event...
        break;

      // Handle other event types...
      default:
        console.log(`Received unknown event type: ${event.name}`);
    }

    res.status(200).json({ received: true });
  } catch (error) {
    console.error('Webhook error:', error.message);
    return res.status(400).json({ error: error.message });
  }
});
Direct reward triggering should only be used when checkpoint-based rewards don’t meet your needs. For most use cases, ingesting checkpoints is the recommended approach.
Trigger rewards programmatically: 
// Trigger a reward
await sdk.rewards.trigger({
  externalUserId: 'user_123',
  environment: 'production', // or 'test'
  rewardFor: ['self', 'referral_partner'] // Who should receive the reward
});

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Best Practices

  1. Keep your access key secure - Never expose it in client-side code
  2. Identify users early - Call identify() before other operations
  3. Use checkpoints for rewards - Configure reward triggers in the dashboard

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Support

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