Hi Calvin, Tadge, Davidson,
Thanks for sharing this important work ...it's exciting to see Utreexo 
maturing into a full BIP proposal. The modular split into accumulator, 
validation, and P2P layers is very clean and helpful for review.
After a quick conceptual and implementation-level analysis, I believe 
there's a critical detail missing from the current accumulator spec: a 
deterministic order for processing UTXO deletions and additions per block.
Aside from that, the spec is well written and shows deep consideration.
Best regards,

El martes, 29 de julio de 2025 a las 20:26:42 UTC-3, Calvin Kim escribió:

> Hello all,
>
> Tadge Dryja, Davidson Souza, and I would like to propose 3 BIPs describing 
> Utreexo, a consensus-compatible (non-soft fork) way to send and verify 
> transactions without storing the full UTXO set.
>
> The 3 BIPs are for:
>
>    1. The specification of the Utreexo accumulator.
>    2. The specification of Bitcoin block and tx validation using the 
>    Utreexo accumulator.
>    3. The peer to peer networking changes required to enable Utreexo 
>    nodes.
>
>
> We are currently looking for conceptual review. Do note that the documents 
> are not final, and they will be updated.
>
> All of the BIPs can be found here: https://github.com/utreexo/biptreexo
>
> We thank you in advance for your time and consideration.
>
> Best,
> Calvin
>

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