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A819DBD3-DC3C-495F-B86C-542DBCB3508A |
Type juggling |
Can you shove multiple variables in one slot? |
We look at important details everyone needs to know when writing smart contracts. Slots, loops and reentrancy. |
2023-10-17T18:00:00-04:00 |
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- Published IRS comments
- How to be aware of problems with when you are calling another contract https://hour.gg/episodes/2022-06-07-episode-27.html
- Type juggling optimization (storage bit stuffing)
- The "signature trick" 32B + 32B + 1B → 64B for public key signatuares
- The bit-stuffing: 48bits for your timestamp + … …. = 256bts, just make sure that you put them in the correct order in your Solidity contract definition
- Should we have an extension for this? Or at least a checklist for optimizing.
- Keep in mind
- Slots
- Loops
- Reentrancy
- Linters
- 037 tried a linter that flagged lots of false positive reentrancies
- How to be aware of problems with when you are calling another contract
- https://hour.gg/episodes/2022-06-07-episode-27.html
- Front-end synchronization ("slippage") and
- How to ensure the price a buyer pays is the price they saw on the website? https://hour.gg/episodes/2021-12-21-episode-3.html
- Watch out for sandwiching/frontrunning
- buy(tokenId, price) // for a ERC-20 order
- buy(tokenId) payable // for a ETH order
- Pentesting as a service
- https://phor.net/ please see "code reviews"
- #1 – test cases
- If you don't define what is your front hole and back hole, then all your holes are back holes
- “Premature optimization is the root of all evil”
- What is the famous artist that said something like: if you are painting and the parts of the face are in the wrong places it is better to throw away the painting and start over
- “Keeping yourself out of dark places is part of the mysticism of creating.”
- Bing says: “I found a quote by Andy Andrews that is similar to what you are looking for: "Successful people make their decisions quickly and change their minds slowly. Failures make their decisions slowly and change their minds quickly."1 I hope this quote is more relevant to your question!”
- Hot take topic: