examples: adds wallet_balance example

bfxapi/examples/wallet_balance.py

@@ -0,0 +1,28 @@
+import os
+import sys
+sys.path.append('../')
+
+from bfxapi.websockets.LiveWebsocket import LiveBfxWebsocket
+
+API_KEY=os.getenv("BFX_KEY")
+API_SECRET=os.getenv("BFX_SECRET")
+
+ws = LiveBfxWebsocket(
+  API_KEY=API_KEY,
+  API_SECRET=API_SECRET,
+  logLevel='INFO'
+)
+
+@ws.on('wallet_snapshot')
+def log_snapshot(data):
+  print ("Opening balance: {}".format(data))
+
+@ws.on('wallet_update')
+def log_update(data):
+  print ("Balance updates: {}".format(data))
+
+ws.on('error')
+def log_error(msg):
+  print ("Error: {}".format(msg))
+
+ws.run()