fix：1、接入合作方的sdk。2、支付逻辑接入sdk中的接口

Assets/AppsFlyer/AFSDKPurchaseDetailsIOS.cs

@@ -4,26 +4,33 @@ using System.Collections.Generic;
 namespace AppsFlyerSDK
 {
     /// <summary>
-    // 
+    /// Purchase type enum matching iOS SDK AFSDKPurchaseType
+    /// </summary>
+    public enum AFSDKPurchaseType
+    {
+        Subscription,
+        OneTimePurchase
+    }
+
+    /// <summary>
+    /// Purchase details class matching iOS SDK AFSDKPurchaseDetails
     /// </summary>
     public class AFSDKPurchaseDetailsIOS
     {
         public string productId { get; private set; }
-        public string price { get; private set; }
-        public string currency { get; private set; }
         public string transactionId { get; private set; }
+        public AFSDKPurchaseType purchaseType { get; private set; }
 
-        private AFSDKPurchaseDetailsIOS(string productId, string price, string currency, string transactionId)
+        private AFSDKPurchaseDetailsIOS(string productId, string transactionId, AFSDKPurchaseType purchaseType)
         {
             this.productId = productId;
-            this.price = price;
-            this.currency = currency;
             this.transactionId = transactionId;
+            this.purchaseType = purchaseType;
         }
 
-        public static AFSDKPurchaseDetailsIOS Init(string productId, string price, string currency, string transactionId)
+        public static AFSDKPurchaseDetailsIOS Init(string productId, string transactionId, AFSDKPurchaseType purchaseType)
         {
-            return new AFSDKPurchaseDetailsIOS(productId, price, currency, transactionId);
+            return new AFSDKPurchaseDetailsIOS(productId, transactionId, purchaseType);
         }
     }