## Solution: Last Deposit Block To get the last block that the user deposited, we need to call the `RocketStorage` contract. First, return the value from `rStorage.getUint` ```solidity return rStorage.getUint(); ``` Next, we need to figure out what key we need to pass in, by looking at the `rETH` contract. Inside of the `rETH` contract, in the `_beforeTokenTransfer` function, the following line of code: ```solidity uint256 lastDepositBlock = getUint(key); ``` gets the last block that the user deposited. The code to compute the key is above: ```solidity bytes32 key = keccak256(abi.encodePacked("user.deposit.block", from)); ``` Let's copy this line of code and paste it into our code. Now, change the `from` address to `user`: ```solidity keccak256(abi.encodePacked("user.deposit.block", user)); ``` The code should look like this: ```solidity return rStorage.getUint( keccak256(abi.encodePacked("user.deposit.block", user)) ); ``` Now let's execute the test. The function that we're testing is called `test_getLastDepositBlock`. The command is: ```bash forge test --fork-url $FORK_URL --match-path test/exercise-swap-rocket-pool.sol --match-test test_getLastDepositBlock -vvv ``` The test should now pass.