# Foundry

The template repository contains submodules and remappings for ds-test assertions for testing, solmate building blocks for contracts, and forge-std to layer on top of EVM cheat codes to improve UX.

## Prerequisites

You must have the following installed:

* [Git](https://git-scm.com/)
* [Yarn](https://yarnpkg.com/)

You should also have an address on the Filecoin Calibration testnet. See the [MetaMask setup page](/basics/assets/metamask-setup.md) for information on how to get an address. You also need test `tFIL` in your wallet.

## Steps

1. Clone the `filecoin-project/fevm-foundry-kit` repository and move into the `fevm-foundry-kit` directory:

```
git clone https://github.com/filecoin-project/fevm-foundry-kit/tree/main.git
cd fevm-foundry-kit
```

2. Install the project dependencies with Yarn:

```
yarn install
```

3. Export your private key from MetaMask. See the [MetaMask documentation](https://support.metamask.io/configure/accounts/how-to-export-an-accounts-private-key/) to find out how to export your private key.
4. Create your env file by running

```
cp .env.example .env
```

5. In your newly created`.env` replace `PRIVATE_KEY` with the one gathered from MetaMask. Also, do the same for the `CALIBRATIONNET_RPC_URL`.:

```bash
PRIVATE_KEY=eed8e9d727a647f7302bab440d405ea87d36726e7d9f233ab3ff88036cfbce9c
CALIBRATIONNET_RPC_URL=https://api.calibration.node.glif.io/rpc/v1
```

6. Inside the `src` folder in a contract called `SimpleCoin.sol`. Deploy this contract using Foundry:

```shell
forge build
forge create --rpc-url https://api.calibration.node.glif.io/rpc/v1 --private-key $PRIVATE_KEY src/SimpleCoin.sol:SimpleCoin --broadcast
```

7. You can now interact with your contract using the contract address given by Foundry.

Done! For more information, see the [Foundry book](https://book.getfoundry.sh/).

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