add gs

RCCService2018/content/LuaPackages/PurchasePrompt/Network/performPurchase.lua

@@ -0,0 +1,28 @@
+local PurchaseError = require(script.Parent.Parent.PurchaseError)
+local Promise = require(script.Parent.Parent.Promise)
+
+local function performPurchase(network, infoType, productId, expectedPrice, requestId)
+	return network.performPurchase(infoType, productId, expectedPrice, requestId)
+		:andThen(function(result)
+			--[[
+				User might purchase the product through the web after having
+				opened the purchase prompt, so an AlreadyOwned status is
+				acceptable.
+			]]
+			if result.success or result.status == "AlreadyOwned" then
+				return Promise.resolve(result)
+			elseif infoType == Enum.InfoType.Product and not result.receipt then
+				return Promise.reject(PurchaseError.UnknownFailure)
+			else
+				if result.status == "EconomyDisabled" then
+					return Promise.reject(PurchaseError.PurchaseDisabled)
+				else
+					return Promise.reject(PurchaseError.UnknownFailure)
+				end
+			end
+		end, function(failure)
+			return Promise.reject(PurchaseError.UnknownFailure)
+		end)
+end
+
+return performPurchase