Foundry Defi is a project that creates an ERC20 stablecoin and then allows users to deposit WETH and WBTC in exchange for a token that will be pegged to the USD.
by Taki Baker Alyasri
- GitHub: hadesbaker
- Twitter: hadesbaker
- LinkedIn: Taki Baker
- Portfolio: takibaker.netlify.app
- Foundry DeFi
- Table of Contents
- Getting Started
- Updates
- Usage
- Deployment to a testnet or mainnet
- Formatting
- git
- You'll know you did it right if you can run
git --version
and you see a response likegit version x.x.x
- You'll know you did it right if you can run
- foundry
- You'll know you did it right if you can run
forge --version
and you see a response likeforge 0.2.0 (816e00b 2023-03-16T00:05:26.396218Z)
- You'll know you did it right if you can run
git clone https://github.com/hadesbaker/foundry-defi.git
cd foundry-defi
forge build
- The latest version of openzeppelin-contracts has changes in the ERC20Mock file. You need to install version 4.8.3 which can be done by
forge install openzeppelin/[email protected] --no-commit
instead offorge install openzeppelin/openzeppelin-contracts --no-commit
make anvil
This will default to your local node. You need to have it running in another terminal in order for it to deploy.
make deploy
forge test
forge coverage
and for coverage based testing:
forge coverage --report debug
- Setup environment variables
You'll want to set your SEPOLIA_RPC_URL
and PRIVATE_KEY
as environment variables. You can add them to a .env
file.
PRIVATE_KEY
: The private key of your account (like from metamask). NOTE: FOR DEVELOPMENT, PLEASE USE A KEY THAT DOESN'T HAVE ANY REAL FUNDS ASSOCIATED WITH IT.- You can learn how to export it here.
SEPOLIA_RPC_URL
: This is url of the sepolia testnet node you're working with. You can get setup with one for free from Alchemy
Optionally, add your ETHERSCAN_API_KEY
if you want to verify your contract on Etherscan.
- Get testnet ETH
Head over to faucets.chain.link and get some testnet ETH. You should see the ETH show up in your metamask.
- Deploy
make deploy ARGS="--network sepolia"
Instead of scripts, we can directly use the cast
command to interact with the contract.
For example, on Sepolia:
- Get some WETH
cast send 0xdd13E55209Fd76AfE204dBda4007C227904f0a81 "deposit()" --value 0.1ether --rpc-url $SEPOLIA_RPC_URL --private-key $PRIVATE_KEY
- Approve the WETH
cast send 0xdd13E55209Fd76AfE204dBda4007C227904f0a81 "approve(address,uint256)" 0x091EA0838eBD5b7ddA2F2A641B068d6D59639b98 1000000000000000000 --rpc-url $SEPOLIA_RPC_URL --private-key $PRIVATE_KEY
- Deposit and Mint DSC
cast send 0x091EA0838eBD5b7ddA2F2A641B068d6D59639b98 "depositCollateralAndMintDsc(address,uint256,uint256)" 0xdd13E55209Fd76AfE204dBda4007C227904f0a81 100000000000000000 10000000000000000 --rpc-url $SEPOLIA_RPC_URL --private-key $PRIVATE_KEY
You can estimate how much gas things cost by running:
forge snapshot
And you'll see an output file called .gas-snapshot
To run code formatting:
forge fmt