# Arké MacOS prototype

**URL:** <https://community.second.tech/t/arke-macos-prototype/156>\
**Category:** Integrations\
**Created:** [October 21, 2025, 8:23am UTC](https://community.second.tech/t/arke-macos-prototype/156 "2025-10-21T08:23:07Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![Christoph](https://community.second.tech/user_avatar/community.second.tech/christoph/32/117_2.png) [@Christoph](https://community.second.tech/u/Christoph)\
**Post date:** [October 21, 2025, 8:23am UTC](https://community.second.tech/t/arke-macos-prototype/156/1 "2025-10-21T08:23:07Z")

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Hi all. Big shout-out to the second.tech team for the great work on Ark. I put together a MacOS prototype wallet app because I wanted to feel out how some of the sensitive UX bits around boarding. It’s been really interesting to dig in and I wanted to share it here in case others find it useful.

Here’s a demo video:

[![](https://community.second.tech/uploads/default/original/1X/88712c4255611f9a03c4e63e0933b02f31bb463c.jpeg "Arké wallet prototypé overview") ](https://www.youtube.com/watch?v=2UffFtiHqDw)

Also happy to share the code if that’s of interest.

Integrating bark was very straightforward, although I am sure I am still missing various nuances. Some questions and thoughts that came up:

1. Are fees simply not implemented at all yet? I somehow expected that there’d be a call to provide transaction info and get a fee estimate back. But maybe that’s not how it works?
2. Is there a way to retrieve the mnemonic via the CLI?
3. Or switch between different mnemonics to manage multiple wallets?
4. When loading the balance, does bark automatically refresh VTXOs if needed? Or did I get the wrong impression? If so, isn’t there a cost involved that users should be aware of ahead of time?
5. What’s the logic around refreshing expired VTXOs? Can they be refreshed just like active ones? Or is there a difference in the process or cost or so?
6. Is it correct that offboarding happens on a VTXO basis and the user cannot choose an exact amount of sats?

That’s it for now. I am hoping that this experimentation can help the project in some small way, and that I can gather some best practices for the [Bitcoin Design Guide](https://bitcoin.design/guide/).

Thanks again for all the hard work on this project.

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