2023-06-20-episode-81.md

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true	74561935-4B07-4FF7-9DB3-BB9E0058306B	Bunnies thesis & Remix	Essential features you need to know	Essential features in Remix that users may not know about with Rob Stupay and a deep dive into OnChainBunnies research by Axelle Moortgat including optimizations and strategies for random ID generation.	2023-06-20 18:00:00 -0400	false	81	full	https://youtu.be/hb0P6guDX4Y	https://twitter.com/fulldecent/status/1674046924075278336	seconds title 0 Intro seconds title 28 OnChainBunnies seconds title 76 Loot algorithm seconds title 147 Solidity optimizer seconds title 212 Memory data seconds title 219 Traits encoding seconds title 313 Stumbled on insiders seconds title 429 Random, no dupes seconds title 574 How to hack random mints seconds title 824 Remix seconds title 824 OnChainBunnies seconds title 1037 Never deploy for your clients	https://media.phor.net/csh/2023-06-20-episode-81.m4a	27561810	audio/x-m4a	1292	type participant stayed-to-end fulldecent type participant stayed-to-end dtedesco1 type participant stayed-to-end 037 type participant stayed-to-end legend type participant stayed-to-end axellemoortgat type participant stayed-to-end themiamiape type participant stayed-to-end ethereumremix type participant stayed-to-end ryestew type participant stayed-to-end sbu_honeyradio type participant stayed-to-end jhinnbay type participant stayed-to-end rocsolmiami type participant stayed-to-end retromort type participant stayed-to-end h_t_v_ type participant stayed-to-end ana_s_14 type participant stayed-to-end stackierobins0n

• OnChainBunnies research
• How NFT randomness works

• Axelle Moortgat: OnChainBunnies research
  • Optimizations
    • Generation instead of storage (Loot generation, SVG)
    • Optimizer
      • Solidity gets translated to opcode by EVM
      • SSTORE is the most expensive opcode
    • Memory data
      • Storage options: Storage data, call data, and memory data
      • Every time you ask for memory data, code is read, data is declared, and data is deleted
    • Bitfieldencoding
      • How to store the IDs?
      • Use bits for every trait
      • Bitfield operations are very cheap
      • Store one integer and get all the data once
  • Random ID generation
    • Uncovered insider trading
      • Developer knows which IDs have which traits and will tell friends
    • How to prevent this? Need to reveal IDs randomly
    • Need a random number, but this is hard on blockchain
    • Some ways
      • Timestamp
      • Miner address
      • Who will be next validator
      • Combination of these to generate a random number
    • Still need to figure out how to generate the IDs as a result
      • Pick numbers in an ascending order
      • Random ID picking algorithm
      • ID revealed at mint
      • Tradeoffs: Can abort transactions if you don’t like what you minted
    • "Randomness can be controlled by sandwiches"
    • Randomness https://blog.phor.net/2022/02/04/Randomization-strategies-for-NFT-drops.html
• Remix Project
  • https://remix.ethereum.org/#lang=en&optimize=false&runs=200&evmVersion=null&version=soljson-v0.8.20+commit.a1b79de6.js&language=Solidity
  • Get your NFT drop by joining as a beta tester at https://docs.google.com/forms/d/e/1FAIpQLSd0WsJnKbeJo-BGrnf7WijxAdmE4PnC_Z4M0IApbBfHLHZdsQ/viewform

1. Community Service Hour episode 81 featuring @axellemoortgat @OnChainBunnies @ryestew

   Key points for efficiently putting image-NFTs on chain

   And things you might not know about Remix IDE

2. Best practices for generating the images when needed ON-CHAIN, and minimizing storage (SSTORE) use.

3. "Randomness can be controlled by sandwiches" // @legend has the official framed book note for this!

4. See also our article https://blog.phor.net/2022/02/04/Randomization-strategies-for-NFT-drops.html about all the tradeoffs

5. Check out Remix at https://remix.ethereum.org and now I can see all this documentation that was always there. Here is where to find it…

   [[ PHOTO ]]

6. Get your NFT drop by joining as a Remix beta tester at [https://docs.google.com/forms/d/e/1FAIpQLSd0WsJnKbeJo-BGrnf7WijxAdmE4PnC_Z4M0IApbBfHLHZdsQ/viewform

   ](https://docs.google.com/forms/d/e/1FAIpQLSd0WsJnKbeJo-BGrnf7WijxAdmE4PnC_Z4M0IApbBfHLHZdsQ/viewform)Is this the first official Ethereum Foundation sanctioned NFT drop?