node-restlet-example.js

/*
    =================    REQUIRED USER ACCOUNT INFORMATION    ==============================================
To install pre-reqs:-
npm install request
npm install oauth-1.0a@1.0.1
*/
var accountID = '4541795_SB1';
var consumer = {
    public: 'YOUR CLIENT ID',
    secret: 'CLIENT SECRET'
};
var token = {
    public: '<YOUR TOKEN ID>',
    secret: '<YOUR TOKEN SECRET>'
};
//for example, https://YOURACCOUNTNUMBER.restlets.api.netsuite.com/app/site/hosting/restlet.nl?script=SCRIPTNUMBER&deploy=DEPLOYNUMBER
var restlet_url = 'https://4541795-sb1.restlets.api.netsuite.com/app/site/hosting/restlet.nl?script=237&deploy=1';

/*
    =========================================================================================================
*/

//REQUIRED NPM MODULES
const request = require('request');
const OAuth   = require('oauth-1.0a');      //version 1.0.1, don't do version 1.1.0

//SET UP THE OAUTH OBJECT
var oauth = OAuth({
    consumer: consumer,
    signature_method: 'HMAC-SHA256'         //you can also use HMAC-SHA1 but HMAC-SHA256 is more secure (supposedly)
});

//SET UP THE REQUEST OBJECT
var request_data = {
    url: restlet_url,
    method: 'POST',
};

//GET THE AUTHORIZATION AND STICK IT IN THE HEADER, ALONG WITH THE REALM AND CONTENT-TYPE
var authorization = oauth.authorize(request_data, token);
var header = oauth.toHeader(authorization);
header.Authorization += ', realm="' + accountID + '"';
header['content-type'] = 'application/json';

//MAKE THE REQUEST
request({
    url: request_data.url,
    method: request_data.method,
    headers: header,
    json: {"action":"createinvoice",
    "data": [
    {
    "invoiceId" : "3888-invoice",
    "saleOrderId" : "9876",
    "origin" : "3890",
    "invoiceDate" : "10/26/2019 10:09:08 PM",
    "name": "INV/0001",
    "stripeTransactionId": "abc13",
    "item" : [
    {
    "invoiceLineId" : "76861",
    "quantity": "1",
    "saleOrderLineId" : "6723",
    "productServiceAmount" : "26.44"
    }
    ]
    }
    ]
    }
}, function(error, response, body) {
    if(error)
    {
        console.log(error);
    }
    else
    {
        console.log(body);
    }
});