Make a simple developer product function?

How can I make an easy developer product prompter that prompts the product, and returns true if it has been purchased and false if it has been canceled or etc..? (NEED HELP FOR SCRIPT IN SERVER SCRIPT STORAGE AND NOT IN LOCAL SCRIPT!) Example:

local MarketplaceService = game:GetService("MarketplaceService")
local product = 0000000000
function pF(plr, id)
	MarketplaceService:PromptProductPurchase(plr, id)
	if bought then
		return true
	else 
		return false
	end
end
game.Players.PlayerAdded:connect(function(plar)
	if pF(plar,product) then -- product defined in line 2
		print("Purchased!")
	else
		print("CANCELLED")
	end
end)