Ws examples

Co-Authored-By: itsdeka <dario.moceri@bitfinex.com>

examples/websocket/wallet_balance.py

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+# python -c "import examples.websocket.wallet_balance"
+
+import os
+
+from typing import List
+
+from bfxapi import Client, WSS_HOST
+from bfxapi.websocket.enums import Error
+from bfxapi.websocket.types import Wallet
+
+bfx = Client(
+    WSS_HOST=WSS_HOST,
+    API_KEY=os.getenv("BFX_API_KEY"),
+    API_SECRET=os.getenv("BFX_API_SECRET")
+)
+
+@bfx.wss.on("wallet_snapshot")
+def log_snapshot(wallets: List[Wallet]):
+    for wallet in wallets:
+        print(f"Balance: {wallet}")
+
+@bfx.wss.on("wallet_update")
+def log_update(wallet: Wallet):
+    print(f"Balance update: {wallet}")
+
+@bfx.wss.on("wss-error")
+def on_wss_error(code: Error, msg: str):
+    print(code, msg)
+
+bfx.wss.run()