rename btc_amount to stake_amount

test/test_main.py

@@ -61,7 +61,7 @@ class TestMain(unittest.TestCase):
                         self.assertEqual(trade.pair, 'BTC_ETH')
                         self.assertEqual(trade.exchange, exchange.Exchange.BITTREX)
                         self.assertEqual(trade.amount, 206.43811673387373)
-                        self.assertEqual(trade.btc_amount, 15.0)
+                        self.assertEqual(trade.stake_amount, 15.0)
                         self.assertEqual(trade.is_open, True)
                         self.assertIsNotNone(trade.open_date)
                         buy_signal.assert_called_once_with('BTC_ETH')

test/test_persistence.py

@@ -10,7 +10,7 @@ class TestTrade(unittest.TestCase):
         with patch('main.exchange.sell', side_effect='mocked_order_id') as api_mock:
             trade = Trade(
                 pair='BTC_ETH',
-                btc_amount=1.00,
+                stake_amount=1.00,
                 open_rate=0.50,
                 amount=10.00,
                 exchange=Exchange.BITTREX,