fix for step_size

the bot is returning the wrong step_size value.
some background, in 0.0.177 -> 178 the step_size function started
failing as binance returned the step_size in a different element of the
filters array. As a change in 178, the step_size was calculated by
merging all the dictionaries available in the filters array. However
there are some filters that also contain a key named stepSize. This
resulted in the stepSize being overwritten by another later key with
that same name and the function returned that value instead.

We now check if the dictionary in the array is the correct filter that
we want to check and retrieve the stepSize from that filter.

app.py

@@ -973,10 +973,10 @@ def get_step_size(self, symbol: str) -> str:
                 logging.error(error_msg)
                 return str(-1)
 
-        result: dict = {}
         for d in info["filters"]:
-            result.update(d)
-        step_size = result["stepSize"]
+            if "filterType" in d.keys():
+                if d["filterType"] == "LOT_SIZE":
+                    step_size = d["stepSize"]
 
         if self.mode == "backtesting" and not exists(f_path):
             with open(f_path, "w") as f:

tests/test_bot.py

@@ -373,7 +373,83 @@ def test_get_step_size(self, bot):
             "get_symbol_info",
             return_value={
                 "symbol": "BTCUSDT",
-                "filters": [{}, {}, {"stepSize": "0.00001000"}],
+                "status": "TRADING",
+                "baseAsset": "BTC",
+                "baseAssetPrecision": 8,
+                "quoteAsset": "USDT",
+                "quotePrecision": 8,
+                "quoteAssetPrecision": 8,
+                "baseCommissionPrecision": 8,
+                "quoteCommissionPrecision": 8,
+                "orderTypes": [
+                    "LIMIT",
+                    "LIMIT_MAKER",
+                    "MARKET",
+                    "STOP_LOSS_LIMIT",
+                    "TAKE_PROFIT_LIMIT",
+                ],
+                "icebergAllowed": "true",
+                "ocoAllowed": "true",
+                "quoteOrderQtyMarketAllowed": "true",
+                "allowTrailingStop": "true",
+                "cancelReplaceAllowed": "true",
+                "isSpotTradingAllowed": "true",
+                "isMarginTradingAllowed": "true",
+                "filters": [
+                    {
+                        "filterType": "PRICE_FILTER",
+                        "minPrice": "0.10000000",
+                        "maxPrice": "100000.00000000",
+                        "tickSize": "0.10000000",
+                    },
+                    {
+                        "filterType": "LOT_SIZE",
+                        "minQty": "0.00100000",
+                        "maxQty": "900000.00000000",
+                        "stepSize": "0.00001000",
+                    },
+                    {
+                        "filterType": "MIN_NOTIONAL",
+                        "minNotional": "10.00000000",
+                        "applyToMarket": "true",
+                        "avgPriceMins": 5,
+                    },
+                    {"filterType": "ICEBERG_PARTS", "limit": 10},
+                    {
+                        "filterType": "MARKET_LOT_SIZE",
+                        "minQty": "0.00000000",
+                        "maxQty": "15943.07122777",
+                        "stepSize": "0.00000000",
+                    },
+                    {
+                        "filterType": "TRAILING_DELTA",
+                        "minTrailingAboveDelta": 10,
+                        "maxTrailingAboveDelta": 2000,
+                        "minTrailingBelowDelta": 10,
+                        "maxTrailingBelowDelta": 2000,
+                    },
+                    {
+                        "filterType": "PERCENT_PRICE_BY_SIDE",
+                        "bidMultiplierUp": "5",
+                        "bidMultiplierDown": "0.2",
+                        "askMultiplierUp": "5",
+                        "askMultiplierDown": "0.2",
+                        "avgPriceMins": 5,
+                    },
+                    {"filterType": "MAX_NUM_ORDERS", "maxNumOrders": 200},
+                    {
+                        "filterType": "MAX_NUM_ALGO_ORDERS",
+                        "maxNumAlgoOrders": 5,
+                    },
+                ],
+                "permissions": [
+                    "SPOT",
+                    "MARGIN",
+                    "TRD_GRP_004",
+                    "TRD_GRP_005",
+                ],
+                "defaultSelfTradePreventionMode": "NONE",
+                "allowedSelfTradePreventionModes": ["NONE"],
             },
         ) as _:
             result = bot.get_step_size("BTCUSDT")