Talk about ERC20 contract

• git
  • You'll know you did it right if you can run git --version and you see a response like git version x.x.x
• foundry
  • You'll know you did it right if you can run forge --version and you see a response like forge 0.2.0 (816e00b 2023-03-16T00:05:26.396218Z)

• run:

  mkdir foundry-erc20-f24
  cd foundry-erc20-f24
  code .
  forge init

• EIP: Ethereum Improvement Proposal
• ERC: Ethereum Request for Comments
• BEP: Binance Evolution Proposal
• PEP: Python Enhancement Proposal
• go to https://eips.ethereum.org/EIPS/eip-20
• go to https://ethereum.org/en/developers/docs/standards/tokens/erc-20/

• ERC-20
• ERC-677
• ERC-777

• create ManualToken.sol

• run

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

• add remappings into foundry.toml
• create OurToken.sol
• run forge build

• create DeployOurToken.s.sol
• create Makefile
• run:

  forge install
  make anvil
  make deploy

• create OurTokenTest.t.sol

• run:

  forge test --match-test testBobBalance

• go to https://etherscan.io/tokenapprovalchecker, we can see the amount eth transferFrom can use

• run:

  forge test --match-test testAllowancesWorks
  forge test
  forge coverage