rest/examples: add wallet transfer examples

bfxapi/examples/rest/transfer_wallet.py

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+import os
+import sys
+import asyncio
+import time
+sys.path.append('../')
+
+from bfxapi import Client
+
+API_KEY=os.getenv("BFX_KEY")
+API_SECRET=os.getenv("BFX_SECRET")
+
+bfx = Client(
+  API_KEY=API_KEY,
+  API_SECRET=API_SECRET,
+  logLevel='DEBUG'
+)
+
+async def transfer_wallet():
+  response = await bfx.rest.submit_wallet_transfer("exchange", "margin", "BTC", "BTC", 0.1)
+  # response is in the form of a Notification object
+  # notify_info is in the form of a Transfer object
+  print ("Transfer: ", response.notify_info)
+
+async def deposit_address():
+  response = await bfx.rest.get_wallet_deposit_address("exchange", "bitcoin")
+  # response is in the form of a Notification object
+  # notify_info is in the form of a DepositAddress object
+  print ("Address: ", response.notify_info)
+
+async def create_new_address():
+  response = await bfx.rest.create_wallet_deposit_address("exchange", "bitcoin")
+  # response is in the form of a Notification object
+  # notify_info is in the form of a DepositAddress object
+  print ("Address: ", response.notify_info)
+
+async def withdraw():
+  # tetheruse = Tether (ERC20)
+  response = await bfx.rest.submit_wallet_withdraw("exchange", "tetheruse", 5, "0xc5bbb852f82c24327693937d4012f496cff7eddf")
+  # response is in the form of a Notification object
+  # notify_info is in the form of a DepositAddress object
+  print ("Address: ", response.notify_info)
+
+async def run():
+  await transfer_wallet()
+  await deposit_address()
+  await withdraw()
+
+t = asyncio.ensure_future(run())
+asyncio.get_event_loop().run_until_complete(t)