From 0dcd33f93f5f33311a6e1fcdb15bd1f070c8b04b Mon Sep 17 00:00:00 2001
From: Pavel Tikhonenko <hi@tikhop.com>
Date: Tue, 25 May 2021 17:25:07 +0300
Subject: [PATCH] Fix compilation issues

---
 Sources/Extras.swift | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Sources/Extras.swift b/Sources/Extras.swift
index 747d49f..c71deff 100644
--- a/Sources/Extras.swift
+++ b/Sources/Extras.swift
@@ -14,6 +14,8 @@ import StoreKit
 @available(watchOSApplicationExtension 6.2, *)
 fileprivate var refreshSession: RefreshSession?
 
+@available(tvOS 12.0, *)
+@available(macOS 10.14, *)
 @available(iOS 12.0, *)
 public class SKSubscriptionGroup
 {
@@ -28,7 +30,12 @@ public class SKSubscriptionGroup
 	
 	init(with products: Set<SKProduct>)
 	{
-		self.identifier = products.first?.subscriptionGroupIdentifier ?? ""
+		guard let gid = products.first?.subscriptionGroupIdentifier else
+		{
+			fatalError("All products must have subscriptionGroupIdentifier")
+		}
+		
+		self.identifier = gid
 		self.products = products
 	}
 	
@@ -50,7 +57,9 @@ public class SKSubscriptionGroup
 
 public typealias GroupIdentifier = String
 
+@available(tvOS 12.0, *)
 @available(iOS 12.0, *)
+@available(macOS 10.14, *)
 public extension SKProductsResponse
 {
 	/// Build a `SKSubscriptionGroup` object
@@ -118,6 +127,8 @@ public extension SKProductsResponse
 	}
 }
 
+@available(tvOS 12.0, *)
+@available(macOS 10.14, *)
 public extension InAppReceipt
 {