[gravicard] database

local modem = peripheral.wrap("right")
local backupModem = peripheral.wrap("bottom")
backupModem.open(69)
modem.open(420)
local db = {}


while true do
    local _, side, freq, rfreq, name = os.pullEvent('modem_message')
    if side == "bottom" then
        if type(name) == "table" then
            db = name
            print("Backup received.")
        elseif name == "askForDB" then
            backupModem.transmit(69, 69, db)
            print("Sent database to backup.")
        end
    elseif side == "right" then
        if db[name] then
            modem.transmit(420, 420, {"Found", db[name]["bal"]})
            print("Account already existed.")
        else
            db[name] = {}
            db[name]["bal"] = 0
            modem.transmit(420, 420, {"Not Found", db[name]["bal"]})
            backupModem.transmit(69, 69, db)
            print("Created new account with name "..name)
        end
    end
end

modem.close()
backupModem.close()