How to buy things with your in game currency?

Good day, Tizzel40.

I assume your game is filtering enabled, so you'd use InvokeServer and onServerInvoke to handle currency transfer.

Otherwise: Since you are looking at this and probably wondering why I assumed your game is filtering enabled, you can handle everything with the client. Should you use datastores, you MIGHT want to handle it with the server.

Enough with the tips, now. Let's get to the actual solution.

FOR FILTERING ENABLED: When a user presses the Buy button, the Client uses InvokeServer to send a request to the RemoteFunction. A serverscript recieves that request and gives the require item to the player. The Client does all the money checking, but the server will be the only one distributing the Speed Coil, because if the Client does, it likely wont be recognized by the server. Now, to put this into code form.

--I assume that the Speed Coil is in ReplicatedStorage.
replicatedStorage = game:GetService('ReplicatedStorage')
gameTools = replicatedStorage.gameTools
getBuyRequest = function(Player, ItemLocation)
    --*
    local Reciever = game:GetService('Players')[Player.Name]
    local itemToBuy = ItemLocation
    local newSpeedCoil = itemToBuy:Clone()
    newSpeedCoil.Parent = Reciever.StarterGear
    newSpeedCoil:Clone().Parent = Reciever.Backpack
end

replicatedStorage.remoteFunctions.handleBuying.OnServerInvoke = getBuyRequest

So then, the client can InvokeServer the remotefunction like so.

if game.Players.LocalPlayer.Money.Value>=tonumber(game.Players.LocalPlayer.PlayerGui.buySystem.buySpeedCoil.Cost.Text) then
    game:GetService('ReplicatedStorage').remoteFunctions.handleBuying:InvokeServer(game:GetService('ReplicatedStorage').gameTools.SpeedCoil)
else
    print('Too little money!')
end

Also, please note that you have to copy this script from the Copy Script button in the top right. I don't know if this only happens to me, but ScriptingHelpers cuts off line 1 by a lot.

FOR EXPERIMENTAL MODE: When a user presses the Buy button, the Client handles everything, unless you want to be fancy and still use remotefunctions in experimental mode. It distributes the Speed Coil to the LocalPlayer by itself. It distributes the gravity coil the same way the ServerScript does.

• >> You might want to make an if statement to check if the ItemLocation is valid, so someone doesnt try to shove a banana into your RemoteFunction.

I hope this helped you with your problem. If you have any questions, don't be afraid to ask!