Add examples/websocket/ticker.py demo.

examples/websocket/ticker.py

@@ -0,0 +1,19 @@
+import asyncio
+
+from bfxapi import Client, Constants
+from bfxapi.websocket import Channels
+from bfxapi.websocket.typings import Subscriptions, TradingPairTicker
+
+bfx = Client(WSS_HOST=Constants.PUB_WSS_HOST)
+
+@bfx.wss.on("t_ticker_update")
+def on_t_ticker_update(subscription: Subscriptions.TradingPairsTicker, data: TradingPairTicker):
+    print(f"Subscription channel ID: {subscription['chanId']}")
+
+    print(f"Data: {data}")
+
+@bfx.wss.once("open")
+async def open():
+    await bfx.wss.subscribe(Channels.TICKER, symbol="tBTCUSD")
+
+asyncio.run(bfx.wss.start())