fn withdraw_helper(ref self: ContractState, yang: ContractAddress, trove_id: u64, amount: Wad) {
    ...

    let new_trove_balance: Wad = trove_balance - amount;
    let new_total: Wad = self.yang_total.read(yang_id) - amount;

    self.charge(trove_id);

    //@audit will not account for exceptional redistribution added to deposits balance in `charge` call

    self.yang_total.write(yang_id, new_total);
    self.deposits.write((yang_id, trove_id), new_trove_balance);

    // Emit events
    self.emit(YangTotalUpdated { yang, total: new_total });
    self.emit(DepositUpdated { yang, trove_id, amount: new_trove_balance });
}
fn charge(ref self: ContractState, trove_id: u64) {
    ...

    // If there was any exceptional redistribution, write updated yang amounts to trove
    if updated_trove_yang_balances.is_some() {
        let mut updated_trove_yang_balances = updated_trove_yang_balances.unwrap();
        loop {
            match updated_trove_yang_balances.pop_front() {
                Option::Some(yang_balance) => {
                    //@audit will updated the trove yang balance
                    self.deposits.write((*yang_balance.yang_id, trove_id), *yang_balance.amount);
                },
                Option::None => { break; },
            };
        };
    }

    ...
}
fn withdraw_helper(ref self: ContractState, yang: ContractAddress, trove_id: u64, amount: Wad) {
        let yang_id: u32 = self.get_valid_yang_id(yang);

        //@audit add exceptional redistribution before calculating `new_trove_balance`
++      self.charge(trove_id);

        // Fails if amount > amount of yang deposited in the given trove
        let trove_balance: Wad = self.deposits.read((yang_id, trove_id));
        assert(trove_balance >= amount, 'SH: Insufficient yang balance');

        let new_trove_balance: Wad = trove_balance - amount;
        let new_total: Wad = self.yang_total.read(yang_id) - amount;

--      self.charge(trove_id);

        self.yang_total.write(yang_id, new_total);
        self.deposits.write((yang_id, trove_id), new_trove_balance);

        // Emit events
        self.emit(YangTotalUpdated { yang, total: new_total });
        self.emit(DepositUpdated { yang, trove_id, amount: new_trove_balance });
    }
