[DVX-919] support exchanges for Business futures websockets — v8.2.0 alpha (#240)

* support optional exchange (for futures business connections)

* 8.2.0-alpha.0

Author: penelopus

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@polygon.io/client-js",
-  "version": "8.1.0",
+  "version": "8.2.0-alpha.0",
   "description": "Isomorphic Javascript client for Polygon.io Stocks, Forex, and Crypto APIs",
   "main": "dist/main.js",
   "types": "dist/main.d.ts",

package.json

@@ -41,5 +41,6 @@ export interface IQuoteFuturesEvent {
 
 export const getFuturesWebsocket = (
   apiKey: string,
-  apiBase = "wss://socket.polygon.io"
-): websocket.w3cwebsocket => getWsClient(`${apiBase}/futures`, apiKey);
+  apiBase = "wss://socket.polygon.io",
+  exchange?: string
+): websocket.w3cwebsocket => getWsClient(`${apiBase}/futures${exchange ? `/${exchange}` : ""}`, apiKey);

src/websockets/futures/index.ts

@@ -24,14 +24,15 @@ export interface IWebsocketClient {
 
 export const websocketClient = (
   apiKey: string,
-  apiBase?: string
+  apiBase?: string,
+  exchange?: string
 ): IWebsocketClient => ({
   crypto: () => getCryptoWebsocket(apiKey, apiBase),
   forex: () => getForexWebsocket(apiKey, apiBase),
   indices: () => getIndicesWebsocket(apiKey, apiBase),
   options: () => getOptionsWebsocket(apiKey, apiBase),
   stocks: () => getStocksWebsocket(apiKey, apiBase),
-  futures: () => getFuturesWebsocket(apiKey, apiBase),
+  futures: () => getFuturesWebsocket(apiKey, apiBase, exchange),
 });
 
 export default websocketClient;