Wayu JS SDK

The official Wayu Pay JavaScript SDK for accepting payments in Venezuela (Pago Móvil and C2P). Generate payment links, receive webhook notifications, and manage multi-merchant payments.

Overview

Wayu Pay lets you accept payments in Venezuela with a simple API. This SDK handles authentication (HMAC-SHA256 signatures), payment link generation, and webhook signature verification.

• Payment Links: Generate checkout URLs in USD or VES
• Webhooks: Verify and process real-time payment notifications
• Multi-Merchant: Route payments to different merchants from a single integration

Installation

npm install wayu-js-sdk
# or
yarn add wayu-js-sdk
# or
pnpm add wayu-js-sdk

Usage

Initialize the client

// CommonJS
const WayuPay = require('wayu-js-sdk');

// ESM
import WayuPay from 'wayu-js-sdk';

const wayu = new WayuPay({
  publicKey: 'pk_sbox_...',
  secretKey: 'sk_sbox_...',
});

// Optional: use sandbox explicitly or override base URL
const wayuProd = new WayuPay({
  publicKey: 'pk_live_...',
  secretKey: 'sk_live_...',
  sandbox: false, // or baseUrl: 'https://services-wayu-checkout-production.up.railway.app'
});

Generate a payment link

const result = await wayu.checkout.generatePaymentUrl({
  amount: { value: 25.0, currency: 'USD' },
  product_name: 'Plan Pro',
  product_description: 'Suscripción mensual',
});

// Save the transactionId in your system
await saveTransaction(result.transactionId);

// Redirect the user to checkout
// window.location.href = result.generatePaymentLink;
console.log(result.generatePaymentLink);
console.log(result.transactionId);

Multi-merchant

const result = await wayu.checkout.generatePaymentUrl({
  amount: { value: 50.0, currency: 'USD' },
  product_name: 'Producto del Merchant',
  product_description: 'El pago va directo al merchant',
  merchant_id: 'merch_001',
});

Verify webhook signatures

The SDK supports two header schemes for backward compatibility:

1. X-Webhook-Signature (docs): HMAC-SHA256(JSON.stringify(payload), webhookSecret)
2. x-signature (legacy): HMAC-SHA256(timestamp:payload_json_sorted, webhookSecret)

app.post('/api/webhooks/wayu', (req, res) => {
  const isValid = wayu.validateWebhook(
    req.headers,
    req.body,
    process.env.WAYU_WEBHOOK_SECRET
  );

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

  const { event, transactionId, data } = req.body;

  switch (event) {
    case 'payment.completed':
      // Update transaction status in your database
      break;
    case 'payment.failed':
      // Notify user of failure
      break;
    case 'payment.expired':
      break;
    case 'payment.refunded':
      break;
  }

  res.status(200).json({ received: true });
});

Webhook events

| Event | Description | |-------|-------------| | payment.completed | Payment was successful | | payment.failed | Payment failed | | payment.expired | Payment link expired | | payment.refunded | Payment was refunded |

API Reference

new WayuPay(config)

Creates a new Wayu Pay client.

• config.publicKey (string, required): Your public API key
• config.secretKey (string, required): Your secret API key
• config.baseUrl (string, optional): Override the API base URL
• config.sandbox (boolean, optional): Use sandbox environment (auto-detected from pk_sbox prefix if not set)

wayu.checkout.generatePaymentUrl(params)

Generates a payment link.

• params.amount (object, required): { value: number, currency: 'USD' | 'VES' }
• params.product_name (string, required): Product name
• params.product_description (string, optional): Product description
• params.merchant_id (string, optional): Merchant ID for multi-merchant

Returns: Promise<{ generatePaymentLink: string, transactionId: string }>

wayu.validateWebhook(headers, body, webhookSecret)

Validates a webhook request signature. Supports X-Webhook-Signature and x-signature headers.

Returns: boolean

wayu.generateSignature()

Generates HMAC-SHA256 signature for API requests (used internally).

Returns: { signature: string, timestamp: string }

Security

• Never expose your secret key in frontend code. Always call the SDK from your backend.
• Sandbox keys start with pk_sbox and sk_sbox.
• The timestamp in API requests must be within the last 5 minutes to prevent replay attacks.

License

MIT