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});

Argument	Description	Type
requestId	The ID of transaction you wish to poll	string

Have any doubts?

In case of any doubts, bugs, or the like, please leave an issue. We would love to help.

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

License

The library is available as open source under the terms of the MIT License.