How would I check if the player has enough currency in datastore to buy an item?

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#1

I am currently working on a currency where players can buy one time products with it. However I have came to a problem, I am unsure about how to go with checking the player has enough cash and if they do then give them the item otherwise send a GUI to notify them.

Thanks!

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#2

Is the cash stored as a Number/IntValue, inside a table or what?

#3

Its Pretty simple

local Cash = player.leaderstats.cash
if Cash.Value >= Cost then
cash.Value -= Cost
--give item
end
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#4

Yes, I was just making sure that I knew what the “cash” value is (Number/IntValue, stored inside a table, etc.). That is correct though.

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#5

Inside a datastore. No values or almost anything stored on the client.

#6

Retrieve the data using GetAsync or UpdateAsync and check the return value.

Demonstration:

local DataStore = game:GetService("DataStoreService"):GetDataStore("Data")

game.Players.PlayerAdded:Connect(function(player)
    local success, data = pcall(DataStore.GetAsync, DataStore, player.UserId)
    
    if success then
        if data then
              if data >= 3 then --> assuming that you have saved some number
                    --> execute code
             end
        end
    end
end)
#7

You need to have gui on the client, Fire with a remote event/function the server to purchase the product, then you can fire back weather the purchase was successful or not

#8

Yeah this is the reason I don’t store the data on the client.

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#9

You can just use a remote function to return whether it was successful or not. Also, @rivertropic if it is just inside a data store you should make a value to hold how much they have while in the game and then save that value to the data store after leaving.

#10

Exploiters could change this value.

#11

No they could not. Just make it on the server and check on the server as well.

#12

Ah, I thought you meant on the client.

#13

My current code for the server on products is:

local DataStoreService = game:GetService("DataStoreService")
local frCashData = DataStoreService:GetDataStore("frCashBETAThree")



function CheckFr(userid)
	local success, frCash = pcall(function()
		return frCashData:GetAsync("player_"..userid)
	end)
	
	if success then
		-- Send data to client, wait for response for how much product costs then check if they have enough
	end
end

How would I add this?

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#14

What are you saving though? Also check if frCash is nil and if it is, send the default data to the client.

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#15

No. Just invoke a remote function on the client telling the server to buy and all that, and then return if it was successful or not.

game.ReplicatedStorage.BuyEvent:InvokeServer(itemName)

On the server:

local prices = {
   ["Item"] = 30;
}

game.ReplicatedStorage.BuyEvent.OnServerInvoke = function(plr, itemName)
          local statsFolder = plr:WaitForChild("leaderstats")
          local cash = statsFolder:WaitForChild("Cash")
          
          if cash.Value >= prices[itemName] then
                cash.Value -= prices[itemName]
                --Code for giving item

               return true --for telling the player that it was purchased
         end
end
#16

The cash isn’t a leaderboard value as it is more of an account balance than a game cash (like simulators etc)

image

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#17

So then just change the cash to the value that it is.

#18

What do you mean? :sweat_smile: Sorry if I seem dumb lol.

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#19

Change this line:

To whatever your cash value for the player is. If it is held inside a table, index it that way.

#20

Okay, I’ll leave it for today and work on it tommorow, thanks for the help!

1 Like