startup

local currencyName = "Diamonds"
local chan = 12345
peripheral.find("modem").open(chan)
if not fs.exists("/users") then
  fs.makeDir("/users")
end
if not fs.exists("/balance") then
  fs.makeDir("/balance")
end
if not fs.exists("/sha256") then
  f = fs.open("sha256",'w')
  f.writeLine(http.get('https://raw.github.com/jakemroman/JakeHub/master/sha256').readAll())
  f.close()
end
os.loadAPI("sha256")
  term.current().setVisible(false)
  term.clear()
  term.current().setVisible(true)
  term.setCursorPos(2,2)
  write("QuantumTech Banking")
  term.setCursorPos(2,5)
  write("If you do not have an account then")
  term.setCursorPos(2,6)
  write("enter your credentials now.")
  term.setCursorPos(2,8)
  write("Currency: ")
  term.setTextColor(colors.black)
  write(currencyName)
  term.setCursorPos(2,9)
  write("Username: ")
  local username = read()
  term.setCursorPos(2,11)
  write("Password: ")
  local password = sha256.sha256(read("*"))
  term.setCursorPos(2,4)
  if fs.exists("/users/"..username) then
    f = fs.open("/users/"..username,"r")
    local pw = f.readAll()
    f.close()
    if pw == password then
      term.setTextColor(colors.green)
      write("Access Granted!")
      sleep(1)
      term.clear()
      term.setCursorPos(1,1)
      term.setTextColor( colors.white )
      write("Logged in as "..username)


    else
      term.setTextColor(colors.red)
      textutils.slowWrite("Access Denied!")
      sleep(2)
  end
  else
    write("Registered!")
    f = fs.open("/users/"..username,"w")
    f.write(password)
    f.close()
    f = fs.open("/balance/"..username,"w")
    f.write("0")
    f.close()
    sleep(2.3)
  end