Developer product if bought

Help and Feedback Scripting Support
#1

im trying to make a game where if you buy a dev product a coin drops into a jar that is in the middle of the room, i have a script wrote but whenever i buy the product it just never works. doe anyone have a fix?

image

#2

Could you show the code on where you used processreceipt

1 Like
#3

It’s because you’re using the ProcessReceipt callback improperly.

There are alot of things you’re missing to successfully complete the purchase.

A detailed explanation is explained here:

https://create.roblox.com/docs/reference/engine/classes/MarketplaceService#ProcessReceipt

Sample script that fits your needs:

local MarketplaceService = game:GetService("MarketplaceService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local DataStoreService = game:GetService("DataStoreService")
local Players = game:GetService("Players")

-- Data store for tracking purchases that were successfully processed
local purchaseHistoryStore = DataStoreService:GetDataStore("PurchaseHistory")

-- Table setup containing product IDs and functions for handling purchases
local productFunctions = {}

-- Your Developer Product ID 1319099915
productFunctions[1319099915] = function(_receipt, player)
     local coin = ReplicatedStorage.Coin
     local clone = coin:Clone()
     Clone.Parent = workspace
   return true
end

-- The core 'ProcessReceipt' callback function
local function processReceipt(receiptInfo)
	-- Determine if the product was already granted by checking the data store
	local playerProductKey = receiptInfo.PlayerId .. "_" .. receiptInfo.PurchaseId
	local purchased = false
	local success, result, errorMessage

	success, errorMessage = pcall(function()
		purchased = purchaseHistoryStore:GetAsync(playerProductKey)
	end)
	-- If purchase was recorded, the product was already granted
	if success and purchased then
		return Enum.ProductPurchaseDecision.PurchaseGranted
	elseif not success then
		error("Data store error:" .. errorMessage)
	end

	-- Determine if the product was already granted by checking the data store  
	local playerProductKey = receiptInfo.PlayerId .. "_" .. receiptInfo.PurchaseId

	local success, isPurchaseRecorded = pcall(function()
		return purchaseHistoryStore:UpdateAsync(playerProductKey, function(alreadyPurchased)
			if alreadyPurchased then
				return true
			end

			-- Find the player who made the purchase in the server
			local player = Players:GetPlayerByUserId(receiptInfo.PlayerId)
			if not player then
				-- The player probably left the game
				-- If they come back, the callback will be called again
				return nil
			end

			local handler = productFunctions[receiptInfo.ProductId]

			local success, result = pcall(handler, receiptInfo, player)
			-- If granting the product failed, do NOT record the purchase in datastores.
			if not success or not result then
				error("Failed to process a product purchase for ProductId:", receiptInfo.ProductId, " Player:", player)
				return nil
			end

			-- Record the transcation in purchaseHistoryStore.
			return true
		end)
	end)

	if not success then
		error("Failed to process receipt due to data store error.")
		return Enum.ProductPurchaseDecision.NotProcessedYet
	elseif isPurchaseRecorded == nil then
		-- Didn't update the value in data store.
		return Enum.ProductPurchaseDecision.NotProcessedYet
	else	
		-- IMPORTANT: Tell Roblox that the game successfully handled the purchase
		return Enum.ProductPurchaseDecision.PurchaseGranted
	end
end

-- Set the callback; this can only be done once by one script on the server!
MarketplaceService.ProcessReceipt = processReceipt
5 Likes
#4

tysm bro, this works perfectly. and i understand how to use PrecessReceipt properly now, i really appreciate it.

1 Like