Consumer Commercial Shopping terminal

--Edit This\/
local Items = {} --item tag, display name, {amount per sale, cost, max sale},available
local BankNet_En = false
local BankKey = 0001
local ShopFile = "Products.txt"
--DONT TOUCH
local Payment = {{"currency:dollar_bill",1},{"currency:ten_dollar_bill",10},{"currency:twenty_dollar_bill",20},{"currency:fifty_dollar_bill",50},{"currency:hundred_dollar_bill",100}}
local Version = "1.2.0"
local ClientBankKey
local w, h = term.getSize()
--Change to sides of computer for chests
local PayChest = peripheral.wrap("top")
local StoreChest = peripheral.wrap("bottom")
--Your Name
local Owner = "Marlin"
--Company
local Company = "WST"
local Label = "Example"


--DONT TOUCH ANYTHING BEYOND THIS
local function start()
for i = 1, #Items do
  local Amount = 0
  for slot, item in pairs(StoreChest.list()) do
    if item.name == Items[i][1] then Amount = Amount + item.count end
  end
  if Amount >= Items[i][3] then Storage[i] = true else Storage[i] = false end
end
if Receipt.CheckPrinter() == false then error("printer error") end
Menu()
Options()
end

local function CurrencyCheck(name)
local Worth = 0
for i = 1, #Payment do
  if name == Payment[i][1] then Worth = Payment[i][2] end
end
return Worth
end

local function CountCash(Target)
local Pay = 0
for slot, item in pairs(PayChest.list()) do
  Pay = Pay + (CurrencyCheck(item.name) * item.count)
end
Pass = false
if Pay >= Target then Pass = true end
return Pass
end

local function TakePayment(Target)
local Pay = 0
Pass = false
for slot, item in pairs(PayChest.list()) do
  local Cash = CurrencyCheck(item.name)
  repeat
    if (Pay + Cash) <= Target then Pay = Pay + Cash TransferItem(slot,"PayChest",1) end
  until (Pay + Cash) > Target
end
if Pay == Target then Pass = true end
return Pass
end

local function FindStoredItem(Name,amount)
local F = 0
for slot, item in pairs(StoreChest.list()) do
  if item.name == Name and F ~= amount then
    if item.count >= amount then
      F = amount
      TransferItem(slot,"StoreChest",F)
    else

    end
  end
end
end

function TransferItem(slot,from,amount)
if from == "PayChest" then
  PayChest.pushItems(peripheral.getName(StoreChest),slot,amount)
else
  StoreChest.pushItems(peripheral.getName(PayChest),slot,amount)
end
end


local function PurchaseLoad(item,price,amount)
local Total = price + (price * GovEc.GetTax("sales"))
if CountCash(Total) == true then
  print("Correct Amount")
  if TakePayment(Total) == true then
    FindStoredItem(item,amount)
    Receipt.PrintReceipt(Company,"Commercial Purchase","Purchase Receipt","n",{{item,amount,price}})
  end
end
end




function Shop()

end

function Login()
local Len = #Company + #Label + 17
term.clear()
term.setCursorPos(w/2 - Len/2,h/2 -1)
print(Company.." - "..Label.." Shop Terminal")
term.setCursorPos(w/2 - 6, h/2 + 1)
print("press enter")
repeat
  local a, b = os.pullEvent("key")
until b == keys.enter
local Sta = BankLogin()
if Sta == true then Shop() end
end

function BankLogin()
term.clear()
term.setCursorPos(w/2 - 4,h/2)
term.write("Bank Key:")

local BV = BankNet.GetV()
term.setCursorPos(w/2 - string.len(BV)/2,h/2 + 2)
term.write(BV)

term.setCursorPos(1,h/2 + 1)
local input

repeat
  input = read()
until string.len(input) == 4
local CKey = input
local Result = BankNet.AuthenticateAccount(CKey)
if Result == true then ClientBankKey = CKey end
return Result
end

function Start()
while true do
  Login()
end
end

Start()