Improve API error messages

hyperliquid/utils/error.py

@@ -4,6 +4,10 @@ class Error(Exception):
 
 class ClientError(Error):
     def __init__(self, status_code, error_code, error_message, header, error_data=None):
+        if error_code is None:
+            super().__init__(f"({status_code}) {error_message}")
+        else:
+            super().__init__(f"({status_code}, {error_code}) {error_message}")
         self.status_code = status_code
         self.error_code = error_code
         self.error_message = error_message
@@ -13,5 +17,6 @@ def __init__(self, status_code, error_code, error_message, header, error_data=No
 
 class ServerError(Error):
     def __init__(self, status_code, message):
+        super().__init__(f"({status_code}) {message}")
         self.status_code = status_code
         self.message = message

tests/error_test.py

@@ -0,0 +1,27 @@
+from hyperliquid.utils.error import ClientError, ServerError
+
+
+def test_client_error_string_includes_api_message():
+    error = ClientError(400, "BadRequest", "invalid order", {"x-request-id": "abc"}, {"field": "coin"})
+
+    assert str(error) == "(400, BadRequest) invalid order"
+    assert error.status_code == 400
+    assert error.error_code == "BadRequest"
+    assert error.error_message == "invalid order"
+    assert error.header == {"x-request-id": "abc"}
+    assert error.error_data == {"field": "coin"}
+
+
+def test_client_error_string_handles_missing_error_code():
+    error = ClientError(429, None, "rate limited", {})
+
+    assert str(error) == "(429) rate limited"
+    assert error.error_code is None
+
+
+def test_server_error_string_includes_status_code_and_message():
+    error = ServerError(503, "temporarily unavailable")
+
+    assert str(error) == "(503) temporarily unavailable"
+    assert error.status_code == 503
+    assert error.message == "temporarily unavailable"