### Exercise 2 Solution To increase liquidity, we will call the function `increaseLiquidity` on the `Nonfungible Position Manager`. So in our code we will start with: ```javascript manager.increaseLiquidity ``` We need to pass in a struct, which is defined inside the interface `INonfungiblePositionManager` as `IncreaseLiquidityParams`. We will copy the struct and include it in our code as: ```javascript INonfungiblePositionManager.increaseLiquidityParams { tokenId, amount0Desired, amount1Desired, amount0Min, amount1Min, deadline } ``` For the `tokenId`, we'll pass in the token id that is provided. For the `amount0Desired`, we'll pass in the DAI balance from the contract, but for simplicity, we will use a number: ```javascript amount0Desired: 500 * 1e18, ``` For `amount1Desired` we can pass in: ```javascript amount1Desired: 1e18, ``` For both `amount0Min` and `amount1Min` we will put 0, and for the `deadline` we will put: ```javascript deadline: block.timestamp ``` This completes Exercise 2. We can execute this test with the command: ```bash forge test --fork-url $FORK_URL --match-path test/uniswap-v3/exercises/UniswapV3Liquidity.test.sol --match-test test_increaseLiquidity -vvv ``` This runs our test and shows the console log. The test passes, and we added approximately 499 DAI, and 0.12 ETH.