_Follow along with this video:_ --- ## Foreword Welcome the second section of `Foundry Fundamentals`. Here we'll cover `Fund Me`, a simple funding contract. You will learn: - How to push your project to GitHub - Write and run amazing tests - Advanced deploy scripts, used to deploy on different chains that require different addresses - How to use scripts to interact with contracts, so we can easily reproduce our actions - How to use a price feed - How to use Chisel - Smart contract automation - How to make our contracts more gas efficient - And many more interesting things! Until now, we talked a lot about storage and state, but we didn't delve into what they really mean. We will learn what all these means! We used this project before when we used Remix. ### Fund Me Going through the [repo](https://github.com/Cyfrin/foundry-fund-me-f23) we can see that our contract is in the `src` folder. Let's open `FundMe.sol`. As you can see we are employing some advanced tools/standard naming conventions: - We use a named error `FundMe__NotOwner();` - We use all caps for constants - `i_` for immutable variables - `s_` for private variables Let's clone this project locally. Open your VS Code, and make sure you are in the `foundry-f23` folder, if not use `cd` to navigate to it. If we run the `ls` command in the terminal, we'll see that the only thing present in the `foundry-f23` folder is the `foundry-simple-storage-f23` folder that we used in the previous section. Run the following command in your terminal: ``` mkdir foundry-fund-me-f23 cd foundry-fund-me-f23 code . ``` The first line creates a new folder called `foundry-fund-me-f23`. The second line changed the directory into the newly created folder. The last line opens up a new VS Code instance using the newly created folder. Now we can apply the knowledge we acquired in the previous section to create a fresh Foundry project. **Do you remember how?** If you do, please proceed in creating a Foundry project on your own. If not peek down below. No worries, we all forget stuff, please run the following command: ``` forge init ``` or ``` forge init --force ``` Foundry will populate the project with the `Counter` files, the script, the main contract and the test. Before deleting it, let's look a bit through these.