docs: use requestThingDescription() instead of fetch in examples

Author: danielpeintner

API.md

@@ -245,7 +245,7 @@ Interacting with another WoT Thing is called consuming a Thing and works by usin
 ##### Fetch a Thing Description of a Thing given its URL
 
 ```javascript
-WoTHelpers.fetch("http://localhost:8080/counter").then(async(td) => {
+WoT.requestThingDescription("http://localhost:8080/counter").then(async(td) => {
   // Do something with the TD
 }
 ```
@@ -255,13 +255,13 @@ URLs can have various schemes, including `file://` to read from the local filesy
 ##### Consume a TD of a Thing, including parsing the TD and generating the protocol bindings in order to access lower level functionality
 
 ```javascript
-WoTHelpers.fetch("http://localhost:8080/counter").then(async (td) => {
+WoT.requestThingDescription("http://localhost:8080/counter").then(async (td) => {
     let thing = WoT.consume(td);
     // Do something with the consumed Thing
 });
 ```
 
-Things can be `consume`d no matter if they were fetched with WoTHelpers or not.
+Things can be `consume`d no matter if they were fetched with `WoT.requestThingDescription()`, `WoTHelpers.fetch()` or any other mean.
 `consume` only requires a TD as an `Object`, so you could also use `fs.readFile` and `JSON.parse` or inline it into your code.
 As long at it results in a TD Object, you can receive it over Fax, Morse it or use smoke signals.
 
@@ -298,10 +298,10 @@ It is an asynchronous function that will take some time to complete.
 So you should handle it explicitly.
 Here we use the `async`/`await` functionality of NodeJS.
 
-Declare the surrounding function as `async`, e.g., the `WoTHelpers.fetch()` resolve handler:
+Declare the surrounding function as `async`, e.g., the `WoT.requestThingDescription()` resolve handler:
 
 ```javascript
-WoTHelpers.fetch(myURI).then(async(td) => { ... });
+WoT.requestThingDescription(myURI).then(async(td) => { ... });
 ```
 
 Use `await` to make Promises synchronous (blocking):

README.md

@@ -180,14 +180,13 @@ Now supposing you want to interact with the device, you have to consume its Thin
 ```JavaScript
 // client.js
 // Required steps to create a servient for a client
-const { Servient, Helpers } = require("@node-wot/core");
+const { Servient } = require("@node-wot/core");
 const { HttpClientFactory } = require('@node-wot/binding-http');
 
 const servient = new Servient();
 servient.addClientFactory(new HttpClientFactory(null));
-const WoTHelpers = new Helpers(servient);
 
-WoTHelpers.fetch("http://localhost:8080/counter").then(async (td) => {
+WoT.requestThingDescription("http://localhost:8080/counter").then(async (td) => {
     try {
         const WoT = await servient.start();
         // Then from here on you can consume the thing

packages/binding-coap/README.md

@@ -26,18 +26,15 @@ The Thing Description is located under the following CoAP URI `coap://plugfest.t
 
 ```js
 // example-client.js
-const { Servient, Helpers } = require("@node-wot/core");
+const { Servient } = require("@node-wot/core");
 const { CoapClientFactory } = require("@node-wot/binding-coap");
 
 // create Servient and add CoAP binding
 const servient = new Servient();
 servient.addClientFactory(new CoapClientFactory());
 
-const wotHelper = new Helpers(servient);
-wotHelper
-    .fetch("coap://plugfest.thingweb.io:5683/testthing")
+WoT.requestThingDescription("coap://plugfest.thingweb.io:5683/testthing")
     .then(async (td) => {
-        // using await for serial execution (note 'async' in then() of fetch())
         try {
             const WoT = await servient.start();
             const thing = await WoT.consume(td);

packages/binding-http/README.md

@@ -29,17 +29,12 @@ The Thing Description is located under the following uri <http://plugfest.thingw
 Servient = require("@node-wot/core").Servient;
 HttpClientFactory = require("@node-wot/binding-http").HttpClientFactory;
 
-Helpers = require("@node-wot/core").Helpers;
-
 // create Servient and add HTTP binding
 let servient = new Servient();
 servient.addClientFactory(new HttpClientFactory(null));
 
-let wotHelper = new Helpers(servient);
-wotHelper
-    .fetch("http://plugfest.thingweb.io:8083/testthing")
+WoT.requestThingDescription("http://plugfest.thingweb.io:8083/testthing")
     .then(async (td) => {
-        // using await for serial execution (note 'async' in then() of fetch())
         try {
             const WoT = await servient.start();
             const thing = await WoT.consume(td);