improve rounding

Th0rgal · Jul 23, 2020 · 369b8b2 · 369b8b2
1 parent 27cb4c6
commit 369b8b2
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Showing 2 changed files with 8 additions and 5 deletions.
diff --git a/binance/client.py b/binance/client.py
@@ -64,7 +64,10 @@ def assert_symbol_exists(self, symbol):
     def round(self, symbol, amount):
         if self.loaded:
             precision = self.symbols[symbol]["baseAssetPrecision"]
-            return f"%.{precision}f" % round(amount, precision)
+            step_size = self.symbols[symbol]["stepSize"]
+            return (
+                f"%.{precision}f" % round((amount // step_size) * step_size, precision)
+            ).strip("0")
         return amount
 
     def assert_symbol(self, symbol):

diff --git a/binance/events.py b/binance/events.py
@@ -58,7 +58,7 @@ def wrap_event(self, event_data):
 
         stream = event_data["stream"] if "stream" in event_data else False
         event_type = event_data["e"] if "e" in event_data else stream
-        if "@" in event_type: # lgtm [py/member-test-non-container]
+        if "@" in event_type:  # lgtm [py/member-test-non-container]
             event_type = event_type.split("@")[1]
         if event_type.startswith("kline_"):
             event_type = "kline"
@@ -81,7 +81,7 @@ def fire(self):
 
 
 class AggregateTradeWrapper(BinanceEventWrapper):
-    def __init__(self, event_data, handlers): # lgtm [py/similar-function]
+    def __init__(self, event_data, handlers):  # lgtm [py/similar-function]
         super().__init__(event_data, handlers)
         self.event_type = event_data["e"]
         self.event_time = event_data["E"]
@@ -97,7 +97,7 @@ def __init__(self, event_data, handlers): # lgtm [py/similar-function]
 
 
 class TradeWrapper(BinanceEventWrapper):
-    def __init__(self, event_data, handlers): # lgtm [py/similar-function]
+    def __init__(self, event_data, handlers):  # lgtm [py/similar-function]
         super().__init__(event_data, handlers)
         self.event_type = event_data["e"]
         self.event_time = event_data["E"]
@@ -140,7 +140,7 @@ def __init__(self, event_data, handlers):
 
 class SymbolMiniTickerWrapper(BinanceEventWrapper):
     def __init__(self, event_data, handlers):
-        super().__init__(event_data, handlers) # lgtm [py/similar-function]
+        super().__init__(event_data, handlers)  # lgtm [py/similar-function]
         self.event_type = event_data["e"]
         self.event_time = event_data["E"]
         self.symbol = event_data["s"]