websocket request with nodeJS - node.js

Question

I am trying to initiate a websocket request using nodeJS. I am new to WS, and I am quite stuck with this, and all examples I could find seem to be the same one with building a chat, repeated over and over in every media lol, and it didn't help me better understand.
I have an API that provides real-time data (forex). I am able to successfully subscribe to sources of real-time data on the front-end, and do what I want. BTW, I don't get any CORS issue doing that, for some reason I don't understand.... :-o
However, i'd like to get this real-time data through my server, so my API key doesn't appear clearly.
So, I want to initiate a request to my server; this request open a channel to the supplier of forex data's API. Then I open a channel to receive this real-time data from my server.
I have thought of the following, but that doesn't work.
var enableWs = require('express-ws');
enableWs(app);
const WebSocket = require('ws');
const WebSocketServer = require('ws').Server;
const URL = 'wss://API_ENDPOINT?api_key=MY_KEY';
app.ws('/ws', function (ws, req) {
const wss = new WebSocket(URL);
let msg = { action: 'subscribe', symbol : 'EUR-USD'};
wss.onopen = (event) => {
wss.send(JSON.stringify(msg));
};
wss.onmessage = function (event) {
jsonData = JSON.parse(event.data);
// now, i want to send the RT data received in jsonData to another channel so I can display the data on the FE
const wssReact = new WebSocketServer({ port: 7100 });
wssReact.send(jsonData);
}
wss.onclose = function (event) {
wss.terminate();
};
});
On the front-end, I expected to get a result when opening a socket as follows :
const socket = new WebSocket('ws://localhost:7100');

Answer 1

ok, I figured how to do what i wanted to achieve. I was close :-) And now it seems obvious lol.
My incoming WS data from the data provider is inconsistent, that's one reason why I couldn't figure the solution earlier.
app.ws('/ws', function (ws, req) {
const wss = new WebSocket(URL);
let msg = { action: 'subscribe', symbol : 'EUR-USD'};
wss.onopen = (event) => {
wss.send(JSON.stringify(msg));
};
wss.onmessage = function (event) {
ws.send(event.data);
}
wss.onclose = function (event) {
wss.terminate();
};
});
I hope it can be of any help to someone else :)