flutterwave-events/index.js

A tiny module to help you handle flutterwave api events automatically

const { EventEmitter } = require('events');
const util = require('util');

const DEFAULT_HASH = process.env.FLUTTERWAVE_SECRET_HASH;
const DEFAULT_OPTIONS = {
  useEventKey: true,
  defaultEventKey: 'FLW_EVENT',
  emitWildCardEvents: true,
};

function FlutterwaveEvents(hash = DEFAULT_HASH, options = DEFAULT_OPTIONS) {
  if (!hash) throw new Error('You must supply your `Flutterwave` secret hash!');

  this._hash = hash;
  this._options = options;

  if (!(this instanceof FlutterwaveEvents)) {
    return new FlutterwaveEvents(key);
  }
}

FlutterwaveEvents.prototype.webhook = function () {
  const self = this;
  return function (req, res, next) {
    const flutterwaveHeader = req.headers['verif-hash'];
    // If the header is empty or request body is empty, then it is not a valid webhook
    if (!flutterwaveHeader || !Object.keys(req.body).length) {
      return res.sendStatus(400);
    }
    if (flutterwaveHeader === self._hash) {
      let eventKey = self._options.defaultEventKey;
      if (self._options.useEventKey) {
        eventKey = req.body.event || self._options.defaultEventKey
      }
      self.emit(eventKey, req.body);
      if (self._options.emitWildCardEvents) {
        self.emit('*', req.body);
      }
      return res.sendStatus(200);
    }
    return res.sendStatus(400);
  };
};

util.inherits(FlutterwaveEvents, EventEmitter);

module.exports = FlutterwaveEvents;