smart-contract-solidity (wip)

study contents:

• https://blog.oliverjumpertz.dev/how-to-set-up-a-solidity-project-and-create-your-first-smart-contract
• https://docs.soliditylang.org/en/v0.4.24/introduction-to-smart-contracts.html
• https://www.freecodecamp.org/news/solidity-tutorial-hardhat-nfts/