-- hypothetical behavior of getPlayerIp
function getPlayerIp(cid)
    return cid
end

killRewardToken = {} --

---------------------------------
-- this would go in a global or compat

-- constructor, you would want to call this up 1st
function killRewardToken.new()
    local temp = {} -- empty table,
    -- construct our metatable
    setmetatable(temp, killRewardToken)

end

-- this is to set the ip as the index of the metatable killRewardToken, with an initial value of current time
function killRewardToken:SetTable(cid)
    self[getPlayerIp(cid)] = os.time()
end

-- this just current time stored in killRewardToken
function killRewardToken:get(cid)
    return self[getPlayerIp(cid)]
end
-----------------------------

killRewardToken.new()
killRewardToken:SetTable(123)
print(killRewardToken:get(123))