Add featured contents and ters + policy

src/content/blog/binance-websocket-ticker.md

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+---
+author: Max Pijittum
+pubDatetime: 2023-12-17T20:00:00Z
+title: Retrieving Binance price ticker with websocket using TypeScript
+postSlug: reading-binance-price-ticker-with-wss-using-typescript
+featured: true
+draft: false
+tags:
+  - trading
+description: Retrieving price ticker from Binance using websocket
+---
+
+Recently, I want to collect Binance trading ticker to simulate a trade setup of a specific pair and was researched for how to do it programmatically and found Binance offered a WSS API to actully subscribe a price ticker.
+
+This is a rough step-by-step i follow through Binance docs:
+
+**Step #1** - Install Binance Typescript connector
+
+```bash
+npm install @binance/connector-typescript
+```
+
+**Step #2** - Exporting Binance API key to your shell session (or add it to environment variable).
+
+```shell
+export API_KEY=<your_api_key>
+export API_SECRET=<you_api_secret>
+```
+
+**Step #3** - Define callaback for Binance websocket events and subscribe to ticker.
+
+```typescript
+import {
+  WebsocketAPI,
+  WsMarketTypes,
+  WebsocketStream,
+} from "@binance/connector-typescript";
+
+const callbacks = {
+  open: () => console.debug("Connected to WebSocket server"),
+  close: () => console.debug("Disconnected from WebSocket server"),
+  message: (data: string) => console.info(data),
+};
+
+const websocketStreamClient = new WebsocketStream({ callbacks });
+
+websocketStreamClient.ticker("bnbbtc");
+
+setTimeout(() => websocketStreamClient.pingServer(), 4000);
+
+setTimeout(() => websocketStreamClient.disconnect(), 6000);
+```
+
+**Optional** - Reconnecting to Binance WSS
+
+```typescript
+setTimeout(() => {
+  websocketStreamClient.ticker("bnbbtc");
+}, 9000);
+
+setTimeout(() => websocketStreamClient.disconnect(), 12000);
+```