# `FlashLev.getMaxFlashLoanAmountUsd` exercise Write your code inside the [`FlashLev` contract](https://github.com/Cyfrin/defi-reth/blob/main/foundry/src/exercises/FlashLev.sol) This exercise is designed to test your understanding of the math for how the max flash loan amount is calculated. ```solidity function getMaxFlashLoanAmountUsd(address collateral, uint256 baseColAmount) external view returns (uint256 max, uint256 price, uint256 ltv, uint256 maxLev) { // Write your code here } ``` ## Instructions 1. **Calculate max flash loan amount in USD** - Implement logic to calculate the max flash loan amount in USD, given the collateral amount. > **Hint:** Look for comments inside `dataProvider` and `oracle` contracts to fetch relevant data. > These contracts are initialized inside `AaveHelper`. ## Testing ```shell forge test --fork-url $FORK_URL --match-path test/exercise-aave-flash-lev.sol --match-test test_getMaxFlashLoanAmountUsd -vvv ```