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Foundry ERC20

This is a section of the Cyfrin Foundry Solidity Course.

⭐️ (7:08:04) | Lesson 10: Foundry ERC20

Getting Started

Requirements

Quickstart

git clone https://github.com/PatrickAlphaC/foundry-erc20-cu
cd foundry-erc20-cu
forge install 
forge build

Optional Gitpod

If you can't or don't want to run and install locally, you can work with this repo in Gitpod. If you do this, you can skip the clone this repo part.

Open in Gitpod

Usage

OpenZeppelin

OpenZeppelin Contracts Docs <br><br> OpenZeppelin GitHub Repo <br>

Installing OpenZeppelin Contracts Package

forge install OpenZeppelin/openzeppelin-contracts --no-commit

Start a local node

make anvil

Deploy

This will default to your local node. You need to have it running in another terminal in order for it to deploy.

make deploy

Deploy - Other Network

See below

Testing

We talk about 4 test tiers in the video.

  1. Unit
  2. Integration
  3. Forked
  4. Staging

This repo we cover #1 and #3.

forge test

or

forge test --fork-url $SEPOLIA_RPC_URL

Test Coverage

forge coverage

Deployment to a testnet or mainnet

  1. 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, similar to what you see in .env.example.

Optionally, add your ETHERSCAN_API_KEY if you want to verify your contract on Etherscan.

  1. Get testnet ETH

Head over to faucets.chain.link and get some testnet ETH. You should see the ETH show up in your metamask.

  1. Deploy
make deploy ARGS="--network sepolia"

Scripts

After deploy to a testnet or local net, you can run the scripts.

Using cast deployed locally example:

cast send <ERC20_CONTRACT_ADDRESS> "transfer()"  --value 0.1ether --private-key <PRIVATE_KEY> --rpc-url $SEPOLIA_RPC_URL

or, to create a ChainlinkVRF Subscription:

make createSubscription ARGS="--network sepolia"

Estimate gas

You can estimate how much gas things cost by running:

forge snapshot

And you'll see and output file called .gas-snapshot

Formatting

To run code formatting:

forge fmt

Thank you!

If you appreciated this, feel free to follow me or donate!

ETH/zkSync/Arbitrum/Optimism Address(cyfrin1.eth): 0x3846c3A30E62075Fa916216b35EF04B8F53931f6

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