Basically i tried to change this script so that it would give player points instead of gold and health but it doesnt do that (This script is in workspace)

local MarketplaceService = game:GetService("PointsService")
local HealthID, GoldID = 20215653 , 20215669 
local PurchaseHistory = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
 
MarketplaceService.ProcessReceipt = function(receiptInfo) 
    local playerProductKey = receiptInfo.PlayerId .. ":" .. receiptInfo.PurchaseId
    if PurchaseHistory:GetAsync(playerProductKey) then
        return Enum.ProductPurchaseDecision.PurchaseGranted --We already granted it.
    end
    -- find the player based on the PlayerId in receiptInfo
    for i, player in ipairs(game.Players:GetPlayers()) do
        if player.userId == receiptInfo.PlayerId then
            -- check which product was purchased (required, otherwise you'll award the wrong items if you're using more than one developer product)
            if receiptInfo.ProductId == HealthID then
                -- handle purchase. In this case we are healing the player.
               game:GetService("PointsService")AwardPoints(player.userId,200)
			 elseif receiptInfo.ProductId == GoldID then
             game:GetService("PointsService")AwardPoints(player.userId,400)
            end
        end	
    end
    -- record the transaction in a Data Store
    PurchaseHistory:SetAsync(playerProductKey, true)	
    -- tell ROBLOX that we have successfully handled the transaction (required)
    return Enum.ProductPurchaseDecision.PurchaseGranted		
end

This one is in the actual GUI button (Local Script)

--Local script
	id = 20215712
sp = script.Parent
	p = game.Players.LocalPlayer
	
	sp.MouseButton1Down:connect(function()
	    game:GetService("MarketplaceService"):PromptProductPurchase(p, id)
	end)
Anonymous