fix：1、添加项目

Assets/AppsFlyer/IAppsFlyerValidateAndLog.cs

@@ -0,0 +1,19 @@
+namespace AppsFlyerSDK
+{
+    public interface IAppsFlyerValidateAndLog
+    {
+        /// <summary>
+        /// The success callback for validateAndSendInAppPurchase API.
+        /// For Android : the callback will return JSON string.
+        /// For iOS : the callback will return a JSON string from apples verifyReceipt API.
+        /// </summary>
+        /// <param name="result"></param>
+        void onValidateAndLogComplete(string result);
+
+        /// <summary>
+        /// The error callback for validateAndSendInAppPurchase API.
+        /// </summary>
+        /// <param name="error">A string describing the error.</param>
+        void onValidateAndLogFailure(string error);
+    }
+}