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Remix Workshop

Non-essential Prerequisites

Basic tasks for people who have never used Remix

  1. Make a new workspace with the default template
  2. Change the name of the workspace
  3. Change the theme - by going to the Settings tab
    • And check what else is in settings
    • You will probably be adding a github key later
  4. Go to the Plugin Manager
  5. Activate Learneth (although you could do this on the hometab)
  6. Check the tutorials Solidity Beginner Course, Soldity ERC20 Token Course, Soldity NFT Course, and the NFT Auction Contract course.
  7. Go back to the File Explorer and choose 2_owner.sol
  8. Compile it in the Solidity Compiler
  9. Then compile it again with the clue mentioned here: https://twitter.com/EthereumRemix/status/1511901727389147136
  10. Click the follow button in Twitter (only if you like)
  11. In the top of the Solidity Compiler, click the > symbol and then click the link to get to the documentation of this plugin.
  12. Open a new tab and go to:
  13. Go to the Deploy & Run Module
  14. Deploy 2_Owner.sol to remix vm
  15. Interact with the changeOwner function - in 2_Owner.sol
    • Hint: you need to input an account address that is not the address of the 1st account in the ACCOUNT select box. If you switch to a different account to copy, remember to switch back to the original account.
  16. Start a debugging session from the terminal
    • Find out what the solidity state & local variables are at different points by dragging the slider or stepping through the transaction.
  17. Switch back to the Deploy & Run Module. Then deploy to another testnet (ganache, hardhat, or a public test chain with Metamask)

More Advanced (but often used) Tasks

Console.log & Switching Accounts

  1. Check the use of console.log in 2_Owner.sol
  2. Edit the message on line 33.
  3. Compile and deploy the contract.
  4. Find your message in the terminal.
  5. Try putting a console.log in the changeOwner function.
  6. Compile and Deploy the contract.
  7. Open up the deployed instance and find the changeOwner function.
  8. Change the account and copy the new account.
  9. Switch back to the original account.
  10. Paste the account address that you copied into changeOwner's parameter newOwner.
  11. Click the changeOwner button.
  12. Why did you need to change back to the original account to run this function?
  13. Find the console.log message you put in this function.

Sending value with a transaction

  1. Make a function changeOwner payable:
  2. Add the word payable after the word public on line 42. - - - Compile the contract and deploy it to the Remix VM.
  3. Send 4 ETH to the contract (using our not so intuitive UI)
  4. Check gas usage of the function - see gas line in the editor
  5. In the deployed instance, see how much value has been sent to the contract.

Cloning

  1. In the File Explorer, click the clone icon on the row of Workspace icons.
  2. and use this repo - or any other you like: https://github.com/Aniket-Engg/solidity-school.git

Editor Features

  1. Go to https://wizard.openzeppelin.com and add some features (or not) and then click on the Open in Remix button.
  2. This will open Remix in a new tab and the workspace will be code-sample.
  3. Compile it.
  4. Then in the Editor, hover over the word onlyOwner.
  5. See the window that pops up. (The file must be compiled for this to pop up).
  6. Right click on the onlyOwner and choose Go to Definition.