# 64 bit arithmetic soft fork

**URL:** <https://delvingbitcoin.org/t/64-bit-arithmetic-soft-fork/397>\
**Category:** Protocol Design\
**Tags:** softfork\
**Created:** [January 10, 2024, 3:36pm UTC](https://delvingbitcoin.org/t/64-bit-arithmetic-soft-fork/397 "2024-01-10T15:36:12Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![Chris\_Stewart\_5](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/chris_stewart_5/32/296_2.png) [@Chris\_Stewart\_5](https://delvingbitcoin.org/u/Chris_Stewart_5)\
**Post date:** [January 10, 2024, 3:36pm UTC](https://delvingbitcoin.org/t/64-bit-arithmetic-soft-fork/397/1 "2024-01-10T15:36:12Z")

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Hi all, when reviewing OP\_TLUV mailing list posts it became clear that 64bit arithmetic would be a subset of necessary changes to enable something like TLUV. I’ve heard from other protocol developers that 64bit arithmetic operations would be useful to their protocols as well.

Here is a live link to my BIP proposal: [64bit arithmetic op codes by Christewart · Pull Request #1538 · bitcoin/bips · GitHub](https://github.com/bitcoin/bips/pull/1538)

and the implementation:

> <https://github.com/bitcoin/bitcoin/pull/29221>
>
> This PR adds 64 bit arithmetic op codes to the Script interpreter.
> 
> 
> This PR …corresponds with this BIP proposal: https://github.com/bitcoin/bips/pull/1538
> 
> This work is heavily borrowed from the elements implementation of 64 bit op codes: https://github.com/ElementsProject/elements/pull/1020

I figured I would try posting here to see if there is any early feedback before sending to the mailing list. Apologies if this isn’t the right format for this venue.

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