Waiting for return?

I have Script and ModuleScript. This is part of how Script looks:

owner = require(script.Owner)

function process(player)
    if owner == nil then
        var = require(player.PlayerGui.buyGui.buyFrame.buyScript)(player, price, name, image)
        print(var)
    end
end

And full ModuleScript:

function wipe()
    script.Parent.ProductPrice.Text = '%price%'
    script.Parent.houseImage.Image = 'rbxassetid://133293265'
    script.Parent.ProductName.Text = '%name%'
    script.Parent.Visible = false
end


local buyFunction = function(player, price, name, image)
        script.Parent.ProductPrice.Text = price
        script.Parent.houseImage.Image = image
        script.Parent.ProductName.Text = name
        local verify
        function verify()
            if player.leaderstats.Cash.Value >= price then
                player.leaderstats.Cash.Value = player.leaderstats.Cash.Value - price
                wipe()
                return 'success'
            elseif player.leaderstats.Cash.Value < price then
                wipe()
                return 'no_money'
            end
        end
        local close
        function close()
            wipe()
            return 'aborted'    
        end
        script.Parent.BuyButton.MouseButton1Click:connect(verify)
        script.Parent.CancelButton.MouseButton1Click:connect(close)
        script.Parent.Visible = true
end

return buyFunction

As you can see, ModuleScript returning status of purchase. But var in Script always is nil. It is because Script not waiting for completing actions in ModuleScript. So how to fix that? I think about BindableFunction for that, but interested is there a way to fix it?