Security that powers the world’s onchain financial system

/// @inheritdoc IPoolManager function sync(Currency currency) public returns (uint256 balance) { balance = currency.balanceOfSelf(); currency.setReserves(balance); } /// @inheritdoc IPoolManager function take(Currency currency, address to, uint256 amount) external override onlyWhenUnlocked { unchecked { // negation must be safe as amount is not negative _accountDelta(currency, -(amount.toInt128()), msg.sender); currency.transfer(to, amount); } } /// @inheritdoc IPoolManager function settle(Currency currency) external payable override onlyWhenUnlocked returns (uint256 paid) { if (currency.isNative()) { paid = msg.value;Critical 01 : L281-290 } else { if (msg.value > 0) NonZeroNativeValue.selector.revertWith(); uint256 reservesBefore = currency.getReserves(); uint256 reservesNow = sync(currency); paid = reservesNow - reservesBefore; } _accountDelta(currency, paid.toInt128(), msg.sender); }