ERC20 Token - WeeToken

This is the implementation of ERC20 Standard Token using Open Zeppelin with foundry framework

Foundry consists of:

• Forge: Ethereum testing framework (like Truffle, Hardhat and DappTools).
• Cast: Swiss army knife for interacting with EVM smart contracts, sending transactions and getting chain data.
• Anvil: Local Ethereum node, akin to Ganache, Hardhat Network.
• Chisel: Fast, utilitarian, and verbose solidity REPL.

Documentation of Foundry

https://book.getfoundry.sh/

Getting Started

Requirements

• Git: Install git on your computer, to make sure it installed correctly you can run git --version on your terminal.
• Foundry: Install foundry on your computer, you'll know you did it correctly if you run forge --version and you see response like forge 0.2.0 on your terminal.

QuickStart

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

Usage

Open Zeppelin

OpenZeppelin Contracts Docs

OpenZeppelin GitHub Repo

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

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.

• 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.

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.

2. Deploy

make deploy-sepolia or any other network you want to add in Makefile 

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!

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