fix(premium): snake_case source/target exchange+quote wire keys

datamaxi/datamaxi/premium.py

@@ -162,19 +162,19 @@ def __call__(  # noqa: C901
         params = {}
 
         if source_exchange is not None:
-            params["sourceExchange"] = source_exchange
+            params["source_exchange"] = source_exchange
 
         if target_exchange is not None:
-            params["targetExchange"] = target_exchange
+            params["target_exchange"] = target_exchange
 
         if asset is not None:
             params["asset"] = asset
 
         if source_quote is not None:
-            params["sourceQuote"] = source_quote
+            params["source_quote"] = source_quote
 
         if target_quote is not None:
-            params["targetQuote"] = target_quote
+            params["target_quote"] = target_quote
 
         if sort is not None:
             params["sort"] = sort

tests/test_premium.py

@@ -55,10 +55,16 @@ def test_premium_call_param_name_translation():
         json=_RESPONSE,
         status=200,
     )
-    _client()(source_exchange="binance", conversion_base="USDT", page=2)
+    _client()(
+        source_exchange="binance",
+        target_quote="USDT",
+        conversion_base="USDT",
+        page=2,
+    )
     qs = _qs(responses.calls[0])
-    # camelCase wire keys for exchange params, snake_case for conversion_base
-    assert qs["sourceExchange"] == ["binance"]
+    # snake_case wire keys for all params (backend expects snake_case)
+    assert qs["source_exchange"] == ["binance"]
+    assert qs["target_quote"] == ["USDT"]
     assert qs["conversion_base"] == ["USDT"]
     assert qs["page"] == ["2"]