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title: FROST/Gordian Meeting Letters (August 2025)

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# Letters for FROST/Bitcoin Meeting

## Gordian Dev

Our next Gordian Dev Meeting is this coming Wednesday, August 6th, at 10am PT.

WHAT? FROST in Bitcoin Gordian Meeting
WHEN? Wed., August 6th, 10am PT
WHERE? Zoom (https://us02web.zoom.us/j/88143195571?pwd=BVv4zCnnaNor97Vj8ayajh26yyICBr.1)

Thanks to a new grant from HRF, we have been working on new tools to make decentralized FROST signatures more accessible to developers. Our prime work in the last few months has been the creation of a demo to generate FROST key shares and then use those to sign a Bitcoin PSBT. We'll be talking about the challenges and showing how it works at our meeting.

The ultimate object was to give you as developers a playground, to experiment with FROST using a command line interface. We know that FROST can be intimidating, and we think this a great way in! It's a learning method that we've found very useful in our Learning Bitcoin From the Command Line course, and we think you'll find it useful here too.

FROST is the important next generation of multisig that will make Bitcoin more resilient and  multisignatures more efficient. We highly encourage wallet developers to attend so that we can give you all the tools you need to play with FROST and so that you can learn enough about it to incorporate it into your own work.

Hope to see you there!

The Blockchain Commons Crew

## FROST Dev

Hi Folks,

As we turn to the back half of the year, Blockchain Commons is preparing another series of FROST workshops and meetings, with the intent of continuing to support its development and to bring it to the attention of wallet developers.

Our first meeting for 2025 will be this coming Wednesday. You're invited!

WHAT? FROST in Bitcoin Gordian Meeting
WHEN? Wed., August 6th, 10am PT
WHERE? Zoom (https://us02web.zoom.us/j/88143195571?pwd=BVv4zCnnaNor97Vj8ayajh26yyICBr.1)

Our prime focus for this meeting will be integrating ZF FROST into the Bitcoin ecosystem using the intermediary of BDK. We've got a working demo and we'll show you have we generate FROST key shares with it, then use those to sign a PSBT! 

We've also got some open questions on ZF FROST, on BDK, and generally what the architectural design should be for this type of work. We hope you can help to answer them!

Jesse Posner, the author of the BIP340 FROST implementation, will be with us. We'd love to get folks from ZF FROST too, since we'll be talking about how to get our PRs merged into the main ZF FROST branch — and whether that's the proper procedure or if we should instead make a branch, and for that matter what sort of ongoing support ZF FROST is receiving at this time. We'd of course love to have any other FROST implementers or developers to share in the conversation!

Hope to see you there,

The Blockchain Commons Crew

## Zcash Forums

When ZF FROST was originally produced, we were thrilled with it as a library that could be used not just for Zcash transactions, but for transactions of other types of cryptocurrencies.

Over the last few months, we've worked to create a set of tools for using ZF FROST to sign Bitcoin PSBTs, and we'll be demoing them at our next Gordian meeting, which you're invited to:

WHAT? FROST in Bitcoin Gordian Meeting
WHEN? Wed., August 6th, 10am PT
WHERE? Zoom (https://us02web.zoom.us/j/88143195571?pwd=BVv4zCnnaNor97Vj8ayajh26yyICBr.1)

Though this is obviously Bitcoin specific, we think the Zcash community might be interested both in seeing how their work on ZF FROST is being put to wider use (and hopefully bringing attention back to Zcash as a result), and also in seeing actual pragmatic uses of FROST signing.

We hope to see you next Wednesday!

The Blockchain Commons Crew

## Bitcoin Dev Post

FROST is the important next generation of multisig that will make Bitcoin more resilient and  multisignatures more efficient. That's why Blockchain Commons has been working on  integrating FROST signing with Bitcoin transactions.

We now have a working demo, and we'll be showing it at our Gordian meeting next Wednesday. You're invited!

WHAT? FROST in Bitcoin Gordian Meeting
WHEN? Wed., August 6th, 10am PT
WHERE? Zoom (https://us02web.zoom.us/j/88143195571?pwd=BVv4zCnnaNor97Vj8ayajh26yyICBr.1)

At the meeting, we'll be talking about the challenges of the integration, especially concerning the need to "tweak" FROST signatures for use with Taproot. We think there are important architectural questions about who should be doing this and when, and there may also be privacy concerns. We'd love to get community input on all those questions. (We'll also be showing how it all works at our meeting!)

The ultimate object of our tool creation was to give developers a playground, to experiment with FROST using a command line interface. It's a learning method that we've found with useful in our Learning Bitcoin From the Command Line course, and we think you'll find it useful here too. 

(It's also just the first step. We hope to offer Learning FROST from the Command Line and Learning BDK from the Command Line courses in the future. If you'd like to help fund these works, please let us know!)

We highly encourage wallet developers to attend so that we can give them all the tools they need to play with FROST. And, we hope to get domain experts too, to help talk about the issues with tweaking FROST signatures for use in Taproot!

If you want to know more about FROST, see our FROST developers page (https://developer.blockchaincommons.com/frost/), which includes links to four previous FROST meetings. You can also sign up for our developers list or our FROST implementers announce-only lists, to get notices of upcoming meetings (https://www.blockchaincommons.com/subscribe/).

Hope to see you next Wednesday!

The Blockchain Commons Crew