In this video I explain how Merkle trees work, how bitmaps work, and how to combine these data structures to implement an efficient airdrop distribution for an ERC20 token. I first explain things at a high-level using the digram, then I show how we can implement it all in solidity.The diagram will be available as an NFT soon. Check my twitter for more info!
Code:
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How contract storage is laid out:
0:00 - intro
0:15 - world state
1:29 - diagram overview
4:08 - airdrop design
6:47 - merkle trees
7:39 - tree construction
9:55 - proofs
13:01 - proof complexity
14:57 - intuition
17:43 - bitmaps
21:16 - bool array
22:06 - uint array
24:30 - mapping
28:14 - code
37:22 - outro
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