add GetPurchasesHistoryAsync for Android

src/Plugin.InAppBilling/Converters.android.cs

@@ -34,5 +34,22 @@ public static InAppBillingPurchase ToIABPurchase(this Purchase purchase)
             };
             return finalPurchase;
         }
+
+        public static InAppBillingPurchase ToIABPurchase(this PurchaseHistoryRecord purchase)
+        {
+            return new InAppBillingPurchase
+            {
+                ConsumptionState = ConsumptionState.NoYetConsumed,
+                OriginalJson = purchase.OriginalJson,
+                Signature = purchase.Signature,
+                Payload = purchase.DeveloperPayload,
+                ProductId = purchase.Skus.FirstOrDefault(),
+                Quantity = purchase.Quantity,
+                ProductIds = purchase.Skus,
+                PurchaseToken = purchase.PurchaseToken,
+                TransactionDateUtc = DateTimeOffset.FromUnixTimeMilliseconds(purchase.PurchaseTime).DateTime,
+                State = PurchaseState.Unknown
+            };
+        }
     }
 }

src/Plugin.InAppBilling/InAppBilling.android.cs

@@ -203,11 +203,32 @@ public override Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemTy
             return Task.FromResult(purchasesResult.PurchasesList.Select(p => p.ToIABPurchase()));
         }
 
+        /// <summary>
+        /// Android only: Returns the most recent purchase made by the user for each SKU, even if that purchase is expired, canceled, or consumed.
+        /// </summary>
+        /// <param name="itemType">Type of product</param>
+        /// <returns>The current purchases</returns>
+        public override async Task<IEnumerable<InAppBillingPurchase>> GetPurchasesHistoryAsync(ItemType itemType)
+        {
+            if (BillingClient == null)
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
+
+            var skuType = itemType switch
+            {
+                ItemType.InAppPurchase => BillingClient.SkuType.Inapp,
+                _ => BillingClient.SkuType.Subs
+            };
+
+            var purchasesResult = await BillingClient.QueryPurchaseHistoryAsync(skuType);
+
+
+            return purchasesResult?.PurchaseHistoryRecords?.Select(p => p.ToIABPurchase()) ?? new List<InAppBillingPurchase>();
+        }
+
         /// <summary>
         /// (Android specific) Upgrade/Downgrade/Change a previously purchased subscription
         /// </summary>
         /// <param name="newProductId">Sku or ID of product that will replace the old one</param>
-        /// <param name="oldProductId">Sku or ID of product that needs to be upgraded</param>
         /// <param name="purchaseTokenOfOriginalSubscription">Purchase token of original subscription</param>
         /// <param name="prorationMode">Proration mode (1 - ImmediateWithTimeProration, 2 - ImmediateAndChargeProratedPrice, 3 - ImmediateWithoutProration, 4 - Deferred)</param>
         /// <returns>Purchase details</returns>

src/Plugin.InAppBilling/Shared/BaseInAppBilling.shared.cs

@@ -49,6 +49,16 @@ public abstract class BaseInAppBilling : IInAppBilling, IDisposable
 		/// <returns>The current purchases</returns>
 		public abstract Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType);
 
+
+
+        /// <summary>
+        /// Android only: Returns the most recent purchase made by the user for each SKU, even if that purchase is expired, canceled, or consumed.
+        /// </summary>
+        /// <param name="itemType">Type of product</param>
+        /// <returns>The current purchases</returns>
+        public virtual Task<IEnumerable<InAppBillingPurchase>> GetPurchasesHistoryAsync(ItemType itemType) => 
+            Task.FromResult<IEnumerable<InAppBillingPurchase>>(new List<InAppBillingPurchase>());
+
         /// <summary>
         /// Purchase a specific product or subscription
         /// </summary>

src/Plugin.InAppBilling/Shared/IInAppBilling.shared.cs

@@ -47,10 +47,17 @@ public interface IInAppBilling : IDisposable
 		/// Get all current purchases for a specific product type. If you use verification and it fails for some purchase, it's not contained in the result.
 		/// </summary>
 		/// <param name="itemType">Type of product</param>
-        /// <param name="verifyPurchase">Verify purchase implementation</param>
 		/// <returns>The current purchases</returns>
 		Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType);
 
+
+        /// <summary>
+        /// Android only: Returns the most recent purchase made by the user for each SKU, even if that purchase is expired, canceled, or consumed.
+        /// </summary>
+        /// <param name="itemType">Type of product</param>
+        /// <returns>The current purchases</returns>
+        Task<IEnumerable<InAppBillingPurchase>> GetPurchasesHistoryAsync(ItemType itemType);
+
         /// <summary>
         /// Purchase a specific product or subscription
         /// </summary>