ProcessReceipt running more than it should

[svenska_kartongbit (Programming_kitten)]

I have tried making script to handle donations by using developerproducts. my issue is that ProcessReceipt is running more than it should. upon donating the first time it works as expected.
donating the second time makes the function run twice, giving them 2x the “dono” points. the same applies to donating 3x and so on

My script incase needed:

local ID = {
	[1] = 1885099102,
	[2] = 0,
	[3] = 0,
	[4] = 0,
	[5] = 0,
	[6] = 0,
	[7] = 0,
	[8] = 0,
}

local Amount = {
	[1885099102] = 10,
	[1] = 50,
	[2] = 100,
	[3] = 250,
	[4] = 500,
	[5] = 750,
	[6] = 1000,
	[7] = 10000,
}

local MarketplaceService = game:GetService("MarketplaceService")

script.Purchase.OnServerEvent:Connect(function(plr, button)
	MarketplaceService:PromptProductPurchase(plr, ID[button])
end)

MarketplaceService.ProcessReceipt = function(receiptInfo)
	if receiptInfo then
		if receiptInfo.PurchaseId then
			local playerId = receiptInfo.PlayerId
			local player = game.Players:GetPlayerByUserId(playerId)
			local productId = receiptInfo.ProductId
			player.DonoAmount.Value += Amount[productId]
			
		end
	end
end

[JamiePro248clone (jaymey)]

add this to the end of the processreceipt function:

return Enum.ProductPurchaseDecision.PurchaseGranted