Alchemix Transmuter

Summary

balanceDeployed view function can be used to check the total deployed alETH but including underlying(WETH) makes it incorrect.

Vulnerability Details

WETH and alETH don’t have the same exchange rate and it is just a softly pegged asset. Including raw WETH in the balanceDeployed view, function will result in the incorrect return value for the external system.

https://github.com/Cyfrin/2024-12-alchemix/blob/82798f4891e41959eef866bd1d4cb44fc1e26439/src/StrategyMainnet.sol#L147

Example Scenario: Let's say the strategy has:

• 100 alETH in the transmuter (unexchanged balance)

• 10 WETH (underlying balance)

• 5 alETH (loose asset balance)

With WETH/alETH exchange rate of 0.95 (meaning 1 WETH = 0.95 alETH), the current implementation would return:

But this is incorrect because those 10 WETH are actually only worth 9.5 alETH (10 * 0.95). The actual deployed value should be:

Impact

Incorrect return data in view function,so i think it is low issue.Tools Used

Recommendations

Either exclude WETH from calculation or implement a way to get the current exchange rate of WETH → alETH and use that.