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Question about EIP-137 (Ethereum Name Service)

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Question about EIP-137 (Ethereum Name Service)

I am trying to build the namehash() algorithm in python for https://eips.ethereum.org/EIPS/eip-137

A screenshot of the algorithm is below. I'm able to get the keccak/sha3 of a specific labelHash (like 'vitalik' and 'eth' for example).

However, I can't for the life of me figure out how to do this recursively. I have tried about every way of adding the 2 hashes together and then hashing again with no luck.

Basically, where it says

the previous output is concatenated with the label hash and hashed again

Does anyone have any tips to do this, or better yet, a working python namehash function?

https://preview.redd.it/mao12orfrim91.png?1763&format=png&auto=webp&s=f3a27a5769d69aa37fd9ec81021ccbb6d02c8878

submitted by /u/guuuuuuuy
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