#TIR: Build a Simple Persistent Key-Value Store in Elixir, using Logs - Part 1

def lookup(key) do GenServer.call(__MODULE__, {:lookup, key}) end def handle_call({:lookup, key}, _from, index_map) do {:reply, get_key_offset_size(key, index_map), index_map} end defp get_key_offset_size(key, index_map) do case Map.get(index_map, key) do {_offset, _size} = offset_size -> {:ok, offset_size} nil -> {:error, :not_found} end end