        fn convert_to_yang_helper(self: @ContractState, asset_amt: u128) -> Wad {
            let asset: IERC20Dispatcher = self.asset.read();
            let total_yang: Wad = self.get_total_yang_helper(asset.contract_address);

            if total_yang.is_zero() {
                let decimals: u8 = asset.decimals();
                // Otherwise, scale `asset_amt` up by the difference to match `Wad`
                // precision of yang. If asset is of `Wad` precision, then the same
                // value is returned
                fixed_point_to_wad(asset_amt, decimals)
            } else {
                (asset_amt.into() * total_yang) / get_total_assets_helper(asset).into() <<<--- the second user calcuates the `yang_amout` using this code
            }
        }
    #[inline(always)]
    fn get_total_assets_helper(asset: IERC20Dispatcher) -> u128 {
        asset.balance_of(get_contract_address()).try_into().unwrap() <<<--- balance_of is used here
    }
