chore: import upstream snapshot with attribution

Common/Interfaces/IDataProviderEvents.cs

@@ -0,0 +1,50 @@
+/*
+ * 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;
+
+namespace QuantConnect.Interfaces
+{
+    /// <summary>
+    /// Events related to data providers
+    /// </summary>
+    public interface IDataProviderEvents
+    {
+        /// <summary>
+        /// Event fired when an invalid configuration has been detected
+        /// </summary>
+        event EventHandler<InvalidConfigurationDetectedEventArgs> InvalidConfigurationDetected;
+
+        /// <summary>
+        /// Event fired when the numerical precision in the factor file has been limited
+        /// </summary>
+        event EventHandler<NumericalPrecisionLimitedEventArgs> NumericalPrecisionLimited;
+
+        /// <summary>
+        /// Event fired when there was an error downloading a remote file
+        /// </summary>
+        event EventHandler<DownloadFailedEventArgs> DownloadFailed;
+
+        /// <summary>
+        /// Event fired when there was an error reading the data
+        /// </summary>
+        event EventHandler<ReaderErrorDetectedEventArgs> ReaderErrorDetected;
+
+        /// <summary>
+        /// Event fired when the start date has been limited
+        /// </summary>
+        event EventHandler<StartDateLimitedEventArgs> StartDateLimited;
+    }
+}