store = require("store")
 
local listOfProducts = { 
       "KP0001",
}
 
local price = {"£0.69"}
local desc = {"Test Description"}
   
 
    local validProducts, invalidProducts = {}, {}
    
    function unpackValidProducts()
    myText[9].text  = "Unpack fired"
        print ("Loading product list")
        if not validProducts then
            native.showAlert( "In-App features not available", "initStore() failed", { "OK" } )        
        else
            for i=1, #invalidProducts do
                native.showAlert( "Item " .. invalidProducts[i] .. " is invalid.",{ "OK" } )
            end
 
        end
    end
    
    function loadProductsCallback( event )
        validProducts = event.products
        price[1] = validProducts[1].price
        desc[1] = validProducts[1].description
 
        myText[5].text = price[1]
        myText[6].text = desc[1]
        myText[7].text = "Load products fired"
 
        invalidProducts = event.invalidProducts    
        unpackValidProducts ()
    
        end
        
        function savePurchase(product)
                --function on what should be save when user buy a product
        end
 
        function transactionCallback( event )
        if event.transaction.state == "purchased" then 
           savePurchase("product") --you should enter here the product being purchased
        elseif event.transcation.state == "restored" then  
           savePurchase("product") --you should enter here the product being purchased
        elseif event.transaction.state == "cancelled" then
        elseif event.transaction.state == "failed" then        
            infoString = "Transaction failed, type: ", event.transaction.errorType, event.transaction.errorString
            local alert = native.showAlert("Failed ", infoString,{ "OK" })
        else
            infoString = "Unknown event"
            local alert = native.showAlert("Unknown ", infoString,{ "OK" })
        end
        store.finishTransaction( event.transaction )
        end
 
        function setupMyStore (event)
                store.loadProducts( listOfProducts, loadProductsCallback )
        end
 
    store.init(transactionCallback)
   timer.performWithDelay (1000, setupMyStore)