chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
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+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+
+using System;
+using QuantConnect.Securities;
+
+namespace QuantConnect.Orders.Fees
+{
+    /// <summary>
+    /// Provides an order fee model that always returns the same order fee.
+    /// </summary>
+    public class ConstantFeeModel : FeeModel
+    {
+        private readonly decimal _fee;
+        private readonly string _currency;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ConstantFeeModel"/> class with the specified <paramref name="fee"/>
+        /// </summary>
+        /// <param name="fee">The constant order fee used by the model</param>
+        /// <param name="currency">The currency of the order fee</param>
+        public ConstantFeeModel(decimal fee, string currency = "USD")
+        {
+            _fee = Math.Abs(fee);
+            _currency = currency;
+        }
+
+        /// <summary>
+        /// Returns the constant fee for the model in units of the account currency
+        /// </summary>
+        /// <param name="parameters">A <see cref="OrderFeeParameters"/> object
+        /// containing the security and order</param>
+        /// <returns>The cost of the order in units of the account currency</returns>
+        public override OrderFee GetOrderFee(OrderFeeParameters parameters)
+        {
+            return new OrderFee(new CashAmount(_fee, _currency));
+        }
+    }
+}