You can just drop ecash in the chat.
erik
erik@primal.net
npub1zqsu...cqrs
Bitcoin Product Designer @ Hoseki. Human Rights Foundation grantee working on ecash.
Riga round four.
When I’m on Nostr I feel optimistic about the direction we’re heading in.
Running Dia browser, but having issues with Nostr.
Who has Lugano recommendations? Send them.
I prototyped a fully functional Bitchat Cashu wallet. From Figma wireframes to Kotlin code running live on Android. Pretty excited about the workflow. Sharing my exact flow in case it helps anyone else.
why would anyone do drugs when they could just vibe code a cashu wallet?
Woke up to a screenshot on TechCrunch. Not sure if anyone reads Tech Crunch anymore but LFG!
Cashu - Open-source Ecash
TechCrunch
Jack Dorsey pumps $10M into a nonprofit focused on open source social media | TechCrunch
Dorsey's initial investment has gotten the new nonprofit "andOtherStuff" up and running, and he worked on some of its initial iOS apps.
Bitchat reminds me of the feeling of coming from school, jumping on IRC, and loading up Counter Strike 1.6.
Here’s an update on what I’ve been working on and what's been happening: grants, hackathons, Cashu, Fedimint, Sovran, and more.
#10 Grants, Hackathons, & Cashu Design
Kicking off summer with design, vibe coding, and an unexpected hackathon W.
TOMORROW, Thursday July 10th at 14:00 UTC the @Bitcoin Design Community will be hosting a design review of the @Fedimint web wallet! Join us!
Call details: 
GitHub
Fedimint Web Wallet Design Call #1 · Issue #807 · BitcoinDesign/Meta
UTCTime: 2025-07-10 14:00 UTC Duration: 1h Agenda Welcome & Call Goals Target Audience & Primary Platform (Web vs Mobile) Key Features & User Flows...
Don't forget to put this on your calendars. Next Thursday, July 10th the @Bitcoin Design community is hosting a @Fedimint web wallet design review call at 14:00 UTC.
We're going to be taking a look at a new Fedimint wallet built during the summer of bitcoin program and discussing where the design community can jump in and help.
Call details:
Call details: GitHub
Fedimint Web Wallet Design Call #1 · Issue #807 · BitcoinDesign/Meta
UTCTime: 2025-07-10 14:00 UTC Duration: 1h Agenda Welcome & Call Goals Target Audience & Primary Platform (Web vs Mobile) Key Features & User Flows...
Any job where you get to work with your heroes is a good job. I’m very fortunate to have a good job.
A quick summary of the Design-a-Note contest we ran as part of the @Bitcoin Design Designathon.
We had community members design printable Cashu banknotes, we brought some of the designs to @BTC Prague Dev/Hack/Day and handed them out loaded with ₿21.
Special thanks to OpenCash for sponsoring this track, @gandlaf21 for building Brr, Tom Badley for judging, and everyone who submitted a design.
View article →
During @BTC Prague Dev/Hack/Day I gave a talk on the State of Cashu Design. I'm sharing the presentation here along with a few key points.
I covered 3 common problem areas that Cashu applications face, what wallets are currently doing to address them, what we could be doing better and how Multinut Payments helps address some of these points.
Discoverability & Onboarding
One of the most common hurdles users experience when they first download a Cashu wallet is the "How do I find a mint?" question.
Some wallets that have made progress in addressing this. Cashu.me and @Boardwalk They have a built in a mint discovery feature, the data is pulled from bitcoinmints.com. Cashu.me does a great job of keeping the discovery flow in wallet.
What could we be doing better?
Bitcoin Mints is a great resource but the current mint list display still requires significant cognitive effort on the users behalf.
Here's a design idea that could reduce that cognitive bottleneck.
Note: There is a centralization risks associated with this design. By showing a limited number of highly rated mints we could be reducing the variety of mints people are using across the Cashu ecosystem.
Rug Protection & Risk Mitigation
Another common problem users face is knowing the risks associated with a mint.
How can users make a more informed decision when picking a mint? bitcoinmints.com shows community ratings (e.g. 4.2⭐) for each mint, but is that enough?
We can combine a mint auditor and mint swaps to increase rug protection and reduce risk.
Let's talk about the mint auditor. It provides detailed information about the performance, uptime, and reliability of Cashu mints.
Cashu.me and @Sovran Money have integrated the mint auditor. In Cashu.me the user can see the mint audit information in a modal before they decide to trust a mint.
What could we be doing better?
Combine the community reviews from bitcoinmints and the audit data from a mint auditor. This could make it easier show the user the most important info in plain english.
Next up, Mint swaps.
Mint swaps allow users to receive ecash into their trusted mint. Reducing the need to hold ecash from unknown mints. Cashu.me and Macadamia both support mint swaps.
Lastly, I want to talk about Multinut Payments. A feature I am very fond of and I think will play a huge role in risk mitigation in the future.
Multinut payments is still in the very early stages. is the only GUI wallet that supports it as of right now.
When making a LN payment for an amount larger than your current mint balance, Multinut Payments allow the user to pay using the balance from multiple mints.
As bullish as I am on Multinut Payments, I know that the UX (right now) is not where it needs to be. If I told you that executing a Multinut payment is simple, you would be right to call me a liar.
The current user cognitive costs outweigh the benefits. Users have to manually choose mints, decide how much to send from each, and manage multiple balances. It feels like doing accounting or using an abacus just to pay an invoice.
What the user actually wants is simple: Pay while being able to spread risk across mints, without losing the convenience of ecash.
I think this Steve Jobs quote nails where we are. The groundwork is here, but we haven’t had enough time to design it so it feels like magic.
The goal isn’t to make users feel smart. It’s to make them feel like it was easy all along.
We have to make it simple. The more time and energy we spend, the better the tools will be.
YOU can help us. You don't need to be a developer or a designer. One of the biggest ways to help is to just USE the tools and give us your thoughts. Tells us what you found confusing, what words didn't make sense. What you felt could be better. Your feedback is a gift.
Link to full presentation: https://www.figma.com/deck/nR0U6iQklDvngKQdHumBlo/State-of-ecash-Design?node-id=1-779&t=C4dfhrCUssAO5qHl-1
I covered 3 common problem areas that Cashu applications face, what wallets are currently doing to address them, what we could be doing better and how Multinut Payments helps address some of these points.
Discoverability & Onboarding
One of the most common hurdles users experience when they first download a Cashu wallet is the "How do I find a mint?" question.
Some wallets that have made progress in addressing this. Cashu.me and @Boardwalk They have a built in a mint discovery feature, the data is pulled from bitcoinmints.com. Cashu.me does a great job of keeping the discovery flow in wallet.
What could we be doing better?
Bitcoin Mints is a great resource but the current mint list display still requires significant cognitive effort on the users behalf.
Here's a design idea that could reduce that cognitive bottleneck.
Note: There is a centralization risks associated with this design. By showing a limited number of highly rated mints we could be reducing the variety of mints people are using across the Cashu ecosystem.
Rug Protection & Risk Mitigation
Another common problem users face is knowing the risks associated with a mint.
How can users make a more informed decision when picking a mint? bitcoinmints.com shows community ratings (e.g. 4.2⭐) for each mint, but is that enough?
We can combine a mint auditor Mint Auditor
Next up, Mint swaps.
Mint swaps allow users to receive ecash into their trusted mint. Reducing the need to hold ecash from unknown mints. Cashu.me and Macadamia macadamia Wallet
macadamia Wallet for iOS
Multinut payments is still in the very early stages. Cashu.me
The current user cognitive costs outweigh the benefits. Users have to manually choose mints, decide how much to send from each, and manage multiple balances. It feels like doing accounting or using an abacus just to pay an invoice.
What the user actually wants is simple: Pay while being able to spread risk across mints, without losing the convenience of ecash.
I think this Steve Jobs quote nails where we are. The groundwork is here, but we haven’t had enough time to design it so it feels like magic.
The goal isn’t to make users feel smart. It’s to make them feel like it was easy all along.
We have to make it simple. The more time and energy we spend, the better the tools will be.
YOU can help us. You don't need to be a developer or a designer. One of the biggest ways to help is to just USE the tools and give us your thoughts. Tells us what you found confusing, what words didn't make sense. What you felt could be better. Your feedback is a gift.
Link to full presentation: https://www.figma.com/deck/nR0U6iQklDvngKQdHumBlo/State-of-ecash-Design?node-id=1-779&t=C4dfhrCUssAO5qHl-1