VantagePay SDK for TypeScript/JavaScript

@vantagepay/vantagepay is the official TypeScript/JavaScript SDK for integrating with VantagePay APIs.

It provides:

• typed API modules backed by VantagePay model types
• automatic HTTP retries for transient failures
• automatic token refresh using refreshToken
• real-time payment status updates via SignalR
• event publishing for session and payment lifecycle signals

This package is client-focused. Administrative API-key capabilities are available in the .NET SDK (VantagePay.SDK) and are not part of this package.

---

Table of Contents

• Installation
• Client Types
• Basic Usage
• Configuration and Construction
• Authentication and Tokens
• Error Handling
• Public API Surface
• Payments and Signals
• Server-side Admin Usage
• Additional Modules

---

Installation

npm install @vantagepay/vantagepay

---

Client Types

This package exposes one top-level client:

• VantagePay for client-facing integrations (web/mobile/POS-style app integrations).

Important:

• there is no VantagePayAdminClient in TypeScript.
• for server-side admin API-key workflows, use the .NET SDK.

---

Basic Usage

import { VantagePay } from '@vantagepay/vantagepay'

const client = new VantagePay({
  baseUrl: 'https://sandbox-api.vantagepay.dev/',
})

await client.auth.login('233548306110', 'Password123!')

const currencies = await client.lookups.getCurrencies()
const summary = await client.reports.getTransactionSummary('GHS')

await client.close()

---

Configuration and Construction

Available VantagePay constructor options:

import { VantagePay } from '@vantagepay/vantagepay'

const client = new VantagePay({
  baseUrl: 'https://sandbox-api.vantagepay.dev/',
  headers: { 'X-EXAMPLE-HEADER': 'Test' },
  language: 'en',
  retries: 3,
  consoleLogging: false,
  logBatchSize: 100,
  logBatchInterval: 60000,
})

Notes:

• baseUrl defaults to http://localhost:5000.
• close() flushes logs, stops payment status checks, unsubscribes events, and aborts in-flight requests.

---

Authentication and Tokens

Login and token storage

import { ApiTokens } from '@vantagepay/vantagepay'

const tokenResponse = await client.auth.login('233548306110', 'Password123!')

console.log(tokenResponse.accessToken)
console.log(ApiTokens.accessToken)
console.log(ApiTokens.refreshToken)

Restore existing tokens

import { ApiTokens } from '@vantagepay/vantagepay'

ApiTokens.accessToken = secureStore.get('accessToken') || null
ApiTokens.refreshToken = secureStore.get('refreshToken') || null

Session helpers

const isLoggedIn = client.auth.isLoggedIn()
await client.auth.refresh()
await client.auth.logout()

Token claim helpers

client.auth.getCurrentUserReference()
client.auth.getCurrentConsumerReference()
client.auth.getCurrentMerchantReference()
client.auth.getCurrentBusinessReference()
client.auth.getCurrentTerminalReference()
client.auth.getCurrentUserName()
client.auth.getMobileNumber()
client.auth.getEmailAddress()
client.auth.getRedirectAction()

---

Error Handling

All API methods throw ApiError for HTTP/API failures.

import { ApiError } from '@vantagepay/vantagepay'

try {
  await client.auth.login('user', 'wrong-password')
} catch (error) {
  if (error instanceof ApiError) {
    console.error(error.statusCode)
    console.error(error.message)
    console.error(error.result)

    if (error.statusCode === 401 && error.result?.mustChangePassword) {
      await client.auth.changePassword('OldPassword', 'NewPassword123!')
    }

    if (error.statusCode === 401 && (error.result?.mustValidatePhoneNumber || error.result?.mustValidateEmailAddress)) {
      await client.auth.resendOtp()
      await client.auth.validateOtp('123456')
    }
  } else {
    throw error
  }
}

---

Public API Surface

VantagePay modules:

Module	Purpose
auth	Login/logout, refresh, OTP, password, face/liveness checks, token claim helpers
lookups	Countries, currencies, languages, banks, wallet operators, categories, product types, address resolution
consumers	Consumer profile operations, files, limits, debit orders, feedback/support
merchants	Merchant profile operations, OTP verify, merchant user flows, product catalog and merchant product management, POS setup/config
payments	Payment initiation, status monitoring, tokenization, interactive payment submissions
notifications	In-app message retrieval and lifecycle
qrCodes	QR decode and QR image generation
reports	Recent transactions, summaries, daily and detailed transaction reporting
system	Health ping
content	Client content and contact-details retrieval (cached)
log	Structured application logging with batching
events	PubSub event bus for session and payment signals

Example API calls:

const banks = await client.lookups.getBanks()
const consumer = await client.consumers.getConsumer()
const merchant = await client.merchants.getMerchant()
const productTypes = await client.merchants.getActiveProductTypes()
const messages = await client.notifications.getMessages()
const recent = await client.reports.getRecentTransactions(10, true)
await client.system.ping()

---

Payments and Signals

Basic payment submission

const status = await client.payments.pay({
  yourReference: 'ORDER-1001',
  paymentSources: {
    mobileWallets: [{
      mobileWalletOperator: 'MTN',
      msisdn: '233555666112',
      amountInCents: 5000,
      currency: 'GHS',
    }],
  },
  paymentDestinations: {
    merchants: [{
      merchantReference: 'merchant-reference',
      amountInCents: 5000,
      currency: 'GHS',
      paymentType: 'BuyingGoods',
    }],
  },
})

Subscribing to payment/session signals

import {
  OnSessionStarted,
  OnSessionExpired,
  OnAutomaticRefresh,
  OnApiRetry,
  OnPaymentStatusUpdate,
  OnPaymentComplete,
  OnRequiresPin,
  OnRequiresConfirmation,
  OnRequires3DSecure,
  OnComplete3DSecure,
  OnRequiresAddress,
} from '@vantagepay/vantagepay'

const sub1 = client.events.subscribe(OnPaymentStatusUpdate, (_, data) => {
  console.log('status update', data)
})

const sub2 = client.events.subscribe(OnPaymentComplete, (_, data) => {
  console.log('payment complete', data.paymentReference)
})

client.events.subscribe(OnRequiresPin, async (_, data) => {
  await client.payments.submitPinCode(data.transactionReference, '1234')
})

client.events.subscribe(OnRequiresConfirmation, async (_, data) => {
  await client.payments.submitConfirmation(data.transactionReference, true)
})

client.events.subscribe(OnRequiresAddress, async (_, data) => {
  await client.payments.submitAddress(data.transactionReference, {
    addressType: 'BILL',
    addressLine1: '10 Main Road',
    city: 'Johannesburg',
    countryIsoCode: 'ZAF',
    postalCode: '2196',
  })
})

client.events.subscribe(OnRequires3DSecure, (_, data) => {
  window.open(data.url)
})

client.events.subscribe(OnComplete3DSecure, () => {
  console.log('3DS completed')
})

client.events.subscribe(OnSessionStarted, () => console.log('session started'))
client.events.subscribe(OnSessionExpired, () => console.log('session expired'))
client.events.subscribe(OnAutomaticRefresh, (_, token) => console.log('refreshed', token))
client.events.subscribe(OnApiRetry, (_, data) => console.log('retry', data.retryCount))

client.events.unsubscribe(sub1)
client.events.unsubscribe(sub2)

Manual status-check control

await client.payments.startPaymentStatusChecking()            // external/incoming payment listener
await client.payments.stopPaymentStatusChecking('payment-ref') // one payment
await client.payments.stopPaymentStatusChecking()              // all payments

Tokenization and notifications

const cardToken = await client.payments.createCardToken({
  cardNumber: '5200000000000114',
  nameOnCard: 'John Doe',
  expiryMonth: 9,
  expiryYear: 2028,
})

await client.payments.sendEmailPaymentNotification('payment-reference', 'user@example.com')
await client.payments.sendSmsPaymentNotification('payment-reference', '233548306110')

Payment helpers

client.payments.getRequiredPinLength('VDF') // 6
client.payments.getRequiredPinLength('MTN') // 4
client.payments.luhnCheck('5200000000000114') // true

---

Server-side Admin Usage

This TypeScript package does not expose admin API-key modules.

For administrative workflows (for example user administration, KYC/KYB administration, template management, and admin payment/refund orchestration), use the .NET SDK VantagePay.SDK with VantagePayAdminClient.

---

Additional Modules

QR utilities

const decoded = await client.qrCodes.decode('000201010211...')
const qrBase64 = await client.qrCodes.generate('https://example.com/pay', 500)

Content

const clientContent = await client.content.getClientContent()
const contactDetails = await client.content.getContactDetails()

Structured logging

client.log.info('User {Username} logged in from {Country}', 'john', 'GHA')
client.log.warn('Payment {PaymentRef} is delayed', 'PAY-123')
await client.log.flush()