ERC implementations

ERC20 (Fungible Token)
ERC721 (Non-Fungible Token)
ERC1155 (ERC20 + ERC721)
ERC777 (Ethereum Based Currency)
ERC223 (Council Standard for European Research)
ERC827 (Third Parties Can Transferred Tokens)
ERC725 (Digital Identity)
ERC621 (Modifies Total Supply)
ERC884 (Stock Tokenization)

Hardhat helper commands

npx hardhat help
npx hardhat compile
npx hardhat test
REPORT_GAS=true npx hardhat test
npx hardhat node
npx hardhat run scripts/deploy.ts