Note: This repo has been recently updated for Sepolia

Foundry Starter Kit

Foundry Starter Kit is a repo that shows developers how to quickly build, test, and deploy smart contracts with one of the fastest frameworks out there, foundry!

• Foundry Starter Kit
• Getting Started
  • Requirements
  • Quickstart
  • Testing
• Deploying to a network
  • Setup
  • Deploying
    • Working with a local network
    • Working with other chains
• Security
• Contributing
• Thank You!
  • Resources
    • TODO

Getting Started

Requirements

Please install the following:

• Git
  • You'll know you've done it right if you can run git --version
• Foundry / Foundryup
  • This will install forge, cast, and anvil
  • You can test you've installed them right by running forge --version and get an output like: forge 0.2.0 (f016135 2022-07-04T00:15:02.930499Z)
  • To get the latest of each, just run foundryup

And you probably already have make installed... but if not try looking here.

Quickstart

git clone https://github.com/smartcontractkit/foundry-starter-kit
cd foundry-starter-kit
make # This installs the project's dependencies.
make test

Testing

make test

or

forge test

Deploying to a network

Deploying to a network uses the foundry scripting system, where you write your deploy scripts in solidity!

Setup

We'll demo using the Sepolia testnet. (Go here for testnet sepolia ETH.)

You'll need to add the following variables to a .env file:

• SEPOLIA_RPC_URL: A URL to connect to the blockchain. You can get one for free from Infura account
• PRIVATE_KEY: A private key from your wallet. You can get a private key from a new Metamask account
  • Additionally, if you want to deploy to a testnet, you'll need test ETH and/or LINK. You can get them from faucets.chain.link.
• Optional ETHERSCAN_API_KEY: If you want to verify on etherscan

Deploying

make deploy-sepolia contract=<CONTRACT_NAME>

For example:

make deploy-sepolia contract=PriceFeedConsumer

This will run the forge script, the script it's running is:

@forge script script/${contract}.s.sol:Deploy${contract} --rpc-url ${SEPOLIA_RPC_URL}  --private-key ${PRIVATE_KEY} --broadcast --verify --etherscan-api-key ${ETHERSCAN_API_KEY}  -vvvv

If you don't have an ETHERSCAN_API_KEY, you can also just run:

@forge script script/${contract}.s.sol:Deploy${contract} --rpc-url ${SEPOLIA_RPC_URL}  --private-key ${PRIVATE_KEY} --broadcast 

These pull from the files in the script folder.

Working with a local network

Foundry comes with local network anvil baked in, and allows us to deploy to our local network for quick testing locally.

To start a local network run:

make anvil

This will spin up a local blockchain with a determined private key, so you can use the same private key each time.

Then, you can deploy to it with:

make deploy-anvil contract=<CONTRACT_NAME>

Similar to deploy-sepolia

Working with other chains

To add a chain, you'd just need to make a new entry in the Makefile, and replace <YOUR_CHAIN> with whatever your chain's information is.

deploy-<YOUR_CHAIN> :; @forge script script/${contract}.s.sol:Deploy${contract} --rpc-url ${<YOUR_CHAIN>_RPC_URL}  --private-key ${PRIVATE_KEY} --broadcast -vvvv

Security

This framework comes with slither parameters, a popular security framework from Trail of Bits. To use slither, you'll first need to install python and install slither.

Then, you can run:

make slither

And get your slither output.

Contributing

Contributions are always welcome! Open a PR or an issue!

Thank You!

Resources

• Chainlink Documentation
• Foundry Documentation

TODO

[ ] Add bash scripts to interact with contracts using cast

[ ] Make deploying contracts to anvil simpler