v2.2.0 - new major version for mempool-js (#2)

* - Refactoring code.
- Refactoring folder structure.
- Adding apiEndpoint and websocketEndpoint to Mempool config.
- Adding brownserify feature.
- Adding MIT LICENSE

* - Changing package.json information.
- Reorganizing README.md information.
- Default export for CommonJs and ES6 Modules.
- Changing default variable to mempoolJS.
- Organizing the API and WS providers.
- Splitting websocket connection types: client and server.

* Change version to 2.2.0.
Reorder keywords in alphabetical order.

src/services/api.ts

@@ -0,0 +1,10 @@
+import axios, { AxiosInstance } from 'axios';
+
+export const makeAPI = (apiEndpoint?: string): { api: AxiosInstance } => {
+  const api = axios.create({
+    baseURL: apiEndpoint,
+  });
+  return {
+    api,
+  };
+};

src/services/wsClient.ts

@@ -0,0 +1,25 @@
+const browserWS = (
+  options: string[],
+  defaultWs: string,
+  websocketEndpoint?: string
+): WebSocket => {
+  const ws = new WebSocket(websocketEndpoint || defaultWs);
+  ws.addEventListener('open', function open() {
+    handleMessage(ws, options);
+  });
+  return ws;
+};
+
+const handleMessage = (ws: WebSocket, options: string[]) => {
+  ws.send(JSON.stringify({ action: 'init' }));
+  setInterval(function timeout() {
+    ws.send(
+      JSON.stringify({
+        action: 'want',
+        data: options,
+      })
+    );
+  }, 500);
+};
+
+export default browserWS;

src/services/wsServer.ts

@@ -0,0 +1,26 @@
+import WebSocket from 'ws';
+
+const serverWS = (
+  options: string[],
+  defaultWs: string,
+  websocketEndpoint?: string
+): WebSocket => {
+  const ws = new WebSocket(websocketEndpoint || defaultWs);
+  ws.on('open', function open() {
+    handleMessage(ws, options);
+  });
+  return ws;
+};
+
+const handleMessage = (ws: WebSocket, options: string[]) => {
+  ws.send(JSON.stringify({ action: 'init' }));
+  setInterval(function timeout() {
+    ws.send(
+      JSON.stringify({
+        action: 'want',
+        data: options,
+      })
+    );
+  }, 500);
+};
+export default serverWS;