Free functions

• shift_bit

• one_shift_left_bytes_felt252

• one_shift_left_bytes_u128

• reversing

• reversing_partial_result

• keccak_u128s_be

• u256_reverse_endian

• u8_array_to_u256

• u32s_to_u256

• u128_array_slice

• u128_split

• read_sub_u128

• u128_join

• pad_left_data