publishing to EventGrid using REST endpoints and Request module

slightlyMoreEventFun.js

const uuid = require("uuid").v4;
const topicCreds = "mytopickey";
const topicEndpoint = "mytopic.westeurope-1.eventgrid.azure.net";
const request = require('request');

function publishEvent(topicURL, topicSecret, eventPayload, callback) {

    const options = {
        method: 'POST',
        url: topicURL,
        headers: {
            'aeg-sas-key': topicSecret
        },
        json: true,
        body: [eventPayload]
    }

    request(options, (err, response, body) => {
        if (err) {
            callback(err)
        } else {
            callback(null, true);
        }
    })
}

module.exports = function(context, req) {
  context.log("JavaScript HTTP trigger function processed a request.");

  let events = [
    {
      id: uuid(),
      subject: "TestSubject",
      dataVersion: "1.0",
      eventType: "Microsoft.MockPublisher.TestEvent",
      eventTime: new Date(),
      data: {
        field1: "value1",
        filed2: "value2"
      }
    }
  ];
  
  publishEvent(topicEndpoint, topicCreds, events, (err,response)=> {
    if (!err) {
      context.res = {
        body: "Success " + result
      };
      context.done(); 
    } else {
      context.log("An error ocurred. " + err);
      context.res = {
        body: "Failure " + err
      };
      context.done();
    });
};