There is no source of errors in doing: bigint_value = float_value * 10^E if E else float_value float_value = bigint_value / 10^E if E else bigint_value Obvious

There is no source of errors in doing: bigint_value = float_value * 10^E if E else float_value float_value = bigint_value / 10^E if E else bigint_value Obviously only convert to real numbers if you are doing operations on numbers in your system, otherwise keep in client format like you said.