Vpos NPM | npm.io

vPOS Javascript

This javascript library helps you easily interact with the vPOS API, Allowing merchants apps/services to request a payment from a client through his/her mobile phone number.

The service currently works for solutions listed below:

EMIS GPO (Multicaixa Express)

Want to know more about how we are empowering merchants in Angola? See our website

Features

Simple interface
Uniform plain old objects are returned by all official libraries, so you don't have to serialize/deserialize the JSON returned by our API.

Documentation

Does interacting directly with our API service sound better to you? See our documentation on developer.vpos.ao

Installation

npm install vpos

Configuration

This javascript library requires you set up the following environment variables on your machine before interacting with the API using this library:

Variable	Description	Required
`GPO_POS_ID`	The Point of Sale ID provided by EMIS	true
`GPO_SUPERVISOR_CARD`	The Supervisor card ID provided by EMIS	true
`MERCHANT_VPOS_TOKEN`	The API token provided by vPOS	true
`PAYMENT_CALLBACK_URL`	The URL that will handle payment notifications	false
`REFUND_CALLBACK_URL`	The URL that will handle refund notifications	false

or using one of the optional arguments

Variable	Description	Required
`posId`	The Point of Sale ID provided by EMIS	false
`supervisorCard`	The Supervisor card ID provided by EMIS	false
`token`	The API token provided by vPOS	false
`paymentCallbackUrl`	The URL that will handle payment notifications	false
`refundCallbackUrl`	The URL that will handle refund notifications	false

Don't have this information? Talk to us

Given you have set up all the environment variables above with the correct information, you will now be able to authenticate and communicate effectively with our API using this library.

The next section will show the various payment actions that can be performed by you, the merchant.

Create a Instance

Creates a new vPOS instance

const Vpos = require('vpos')

// use the default environment variables option
let merchant = new Vpos();

// or use optional arguments option
let merchant = new Vpos({token: 'your_token_here'})

Get a specific Transaction

Retrieves a transaction given a valid transaction ID.

let response = await merchant.getTransaction({transactionId: '1jYQryG3Qo4nzaOKgJxzWDs25Ht'});

Argument	Description	Type
`transactionId`	An existing Transaction ID	`string`

New Payment Transaction

Creates a new payment transaction given a valid mobile number associated with a MULTICAIXA account and a valid amount.

let payment = await merchant.newPayment({amount: '123.45', customer: '915898553'});

Argument	Description	Type
`mobile`	The mobile number of the client who will pay	`string`
`amount`	The amount the client should pay, eg. "259.99", "259,000.00"	`string`

Request Refund

Given an existing parent_transaction_id, request a refund.

let response = await merchant.newRefund({parentTransactionId: '1kTFGhJH8i58uD9MdJpMjWnoE'});

Argument	Description	Type
`parent_transaction_id`	The ID of transaction you wish to refund	`string`

Poll Transaction Status

Poll the status of a transaction given a valid request_id.

Note: The request_id in this context is essentially the transaction_id of an existing request.

let response = await merchant.getRequest({requestId: '1jYQryG3Qo4nzaOKgJxzWDs25Ht'});

Complete `getRequest()` example with additional Context

let payment = await merchant.newPayment({amount: '123.45', customer: '915889553'});
refundId = merchant.getRequestId({response: payment})

let response = await merchant.getRequest({requestId: refundId});