Hynek

Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

Profile Code

nprofile1qqs03rnx9xejpjpm2kg8tvyy69xqqpp7q8wzq6gc0qkwgr25u5j5m4gpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0ds0avghn

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

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Last Notes

2026-05-09 04:09:49 UTC

Come to Prague in June and don’t miss Freedom Tech Summit (powered by @npub1mft…rkl3 , event formerly known as dev/hac/day). It’s a highly inspiring and interactive event for people interested in building within the #bitcoin, #cashu, #nostr, and other self-sovereign technology.
I’m very grateful that this year I’ll also be giving a short workshop introducing the @npub1kkh…jvz8 project. 🎉
https://freedomtechsummit.com/

2026-05-01 18:23:05 UTC

Satoshi can reveal himself at any time simply by signing a message. Maybe his fingers itch somewhere and he occasionally feels like doing something like that.
But quantum computers might make it possible for anyone to eventually create such a signature. In that sense, we will all truly become Satoshi. And finally relieve him of that burden.
#weareallsatoshi

2026-05-01 17:35:27 UTC

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Aren’t you describing Numo?
https://numopay.org/

2026-05-01 08:23:30 UTC

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I don’t care who he is. But the message he sends is positive.

2026-05-01 06:47:03 UTC

@npub17fz…9yxv is great for sharing bitcoin with people who don’t yet have any bitcoin or even a bitcoin wallet. However, when I compose a specific denomination, it ends up being a lot of tokens - in other words, a very long URL that I’m trying to use. The web URL is so long that messaging apps often don’t even recognize it as a link… and it can even look a bit like a scam. In printed form, I can’t use animated QR codes.
I understand that using powers of two has many advantages, such as privacy or simpler splitting and merging. However, wouldn’t it make sense in some cases to create one-time exact denominations? Or to keep it composed of many tokens, but allow the mint to temporarily group them into a single alias? Since there is already trust in the given mint, it feels like this wouldn’t introduce additional risk.
What do you think? @npub12rv…85vg ? 🙏

2026-05-01 05:39:59 UTC

Banksy strikes again.. The statue looks good to me.
https://www.bbc.com/news/articles/c5y9wlnwl85o

2026-05-01 04:42:25 UTC

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Calling something self-custody means today “Regulator, it’s not your business”
But true that it’s not fully true. Just like with Ark or Spark…

2026-04-30 05:56:48 UTC

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That sounds frustrating, but got it.

2026-04-30 05:48:28 UTC

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Hopefully someone will raise the flag and vibe code better alternative 🤞

2026-04-30 05:43:41 UTC

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Keep calm and use @npub1v5u…n0v5 ?
Or mp3 for music I guess? 😬

2026-04-30 05:02:07 UTC

Another browser extension that shows the prices on any website in real money:
https://chromewebstore.google.com/detail/fiat2satoshi/nihiakcjmmnpacepgpfkjbhmndohjkag

2026-04-30 04:54:51 UTC

We live in a funny time. The governor of the Czech National Bank is giving a lecture about bitcoin. 😀 He says that if they allocate 1% to bitcoin, they can get more value for the same level of risk. Feels good, but don’t forget that fiat is a scam.  
https://xcancel.com/BitcoinMagazine/status/2049187896440320054

2026-04-27 12:44:16 UTC

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Nechceš zítra přinést?

2026-04-25 06:36:24 UTC

Příští pražské setkání @npub18cs…y4jv bude na téma adopce bitcoinu. Vítaný je každý, koho téma zajímá. Představím aplikaci @npub1kkh…jvz8 , se kterou je použití bitcoinu opravdu velmi jednoduché. Po krátké prezentaci bude diskuze - co komu v používání bitcoinu funguje nejlépe nebo co naopak komu chybí.
Linky nabízí několik způsobů, jak poslat lidem bitcoin.
- Poslat přes Facebook, WhatsApp, Signal nebo jakoukoliv jinou chatovací aplikaci
- Fyzicky na NFC kartě
- Nebo když už na někoho máte kontakt, tak mu platíte na přímo nebo naopak platbu vyžádáte
Přihlásit se na setkání můžete zde:
https://meetup.jednadvacet.org/events/BRkTAg9
Nebo pokud nemáte lightning peněženku: https://luma.com/ez4662ss
Kdybyste měli chuť pomoct s testováním, tak se můžete přidat do dedikované Signal skupiny:
https://signal.group/#CjQKIJKUyBsblgjCdYXJ4WOrI6s8u7uuYsip0oUIIBkIlEl9EhCH7JDQ13hWRWNZ5RkQeLJV
Nebo si to jen tak můžete sami vyzkoušet: https://linky.fit/

2026-04-21 05:33:15 UTC

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How is active address defined?

2026-04-19 11:55:18 UTC

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Better key storage for cashu wallet - @npub1kkh…jvz8

2026-04-16 07:00:02 UTC

Trezor Suite is introducing Suite Sync. 🎉
Now you can label wallets, accounts, addresses and having that synchronized between various devices without any email. Privately and only based on your hardware device.
https://trezor.io/guides/trezor-suite/suite-sync
And desktop now supports BIP-329 labels exports and imports. Mobile hopefully following next month.

2026-04-02 04:01:50 UTC

What bitcoin app do you recommend to your friends?
After checking more than 20 alternatives, I decided to build my own version - designed with each user’s independence in mind.
Give it a try and help me make it even better. 🚀
https://linky.fit @npub1kkh…jvz8

2026-03-22 18:46:44 UTC

Embrace the competitors…

2026-03-22 10:38:30 UTC

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Delivery is still demanding…

2026-03-21 22:11:57 UTC

At the last bitcoin meetup, I was intrigued by a 60-year-old bitcoiner who wasn’t interested in any lofty ideas about how bitcoin will improve the world. He simply has bad experiences with the state. Many years ago, he didn’t pay a property tax. It was a relatively small amount. However, over the years, they calculated very high interest on it. Eventually, he wasn’t able to pay it at all. Gradually, debt collectors stripped him of all his official assets.
He renounced his citizenship - I’m not sure how he manages it, but he says he only has a passport and a driver’s license. He has to renew the driver’s license every five years, and for that purpose he temporarily arranges citizenship again. I might be using some terms incorrectly. In any case, this person lives in the Czech Republic but doesn’t have any bank account, so he pays for everything he can with bitcoin. 🔥
For that reason, he also dreams of better ways to acquire bitcoin around the world. Like peer-to-peer exchanges even in smaller amounts (for security reasons), based just on location, or cooperating with pensioners who have bank accounts, so they can buy bitcoin for him on exchanges and he gives them cash with an extra fee.
And btw his mother is over 80 and collects sats through silly online clicking games. Seems like that the age is not a blocker for using bitcoin at all.

2026-03-21 20:42:30 UTC

Is there some issue with https://testnut.cashu.space?

2026-03-21 19:34:22 UTC

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Cool. This makes me a bit nervous on the other hand. Meaning that sometimes it feels like regulations are moving faster than the development.

2026-03-21 19:25:39 UTC

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I don’t remember paying bills feature. But I’m that old that I remember using Mycelium 🫣

2026-03-21 19:23:32 UTC

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I’m talking about my tryings. No VCs involved 😀

2026-03-21 19:06:59 UTC

It feels weird to see one week old version of an application 😀

2026-03-21 07:50:20 UTC

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Nice 👏

2026-03-21 07:40:02 UTC

Eddie created a “Med-O-Mat” - a honey vending machine. Two things about it caught my attention:
1. The goal wasn’t to use lightning, but to find a working offline payment solution. And bitcoin, with the help of LNbits, turned out to be the best approach. 💪
2. He built it in a small village where most residents are of retirement age and generally not interested in bitcoin. But once he helped the first elderly lady set up an LN wallet and sent her first sats, it triggered a chain reaction. She started showing it to others. It seems that age is not a barrier to bitcoin adoption at all.
According to Eddie, locals have even started using these payments in some other businesses. 🔥
https://www.med-o-mat.cz/

2026-03-20 13:31:52 UTC

... https://image.nostr.build/0d9c0553a4c1d06111902966e1b0a0209b134d6fcf280745147c330ad7f098d9.jpg

2026-03-17 04:34:35 UTC

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You can’t vibe code a plant yet 🙂

2026-03-15 16:01:53 UTC

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Sounds great 🔥

2026-03-15 14:39:17 UTC

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Tech is mostly helping to reveal lies. The future might be very bright.

2026-03-15 14:27:48 UTC

I’m reading Humankind and it’s surprising how good and kind people actually are.
And that only fews are trying hard to turn us against each other.
https://image.nostr.build/b808a559768470d5b680e71d2d0993cea7262f93aec6d6009a803c0d87c9f3ea.jpg

2026-03-15 05:12:29 UTC

We’re on a mission to provide you an bitcoin onboarding tool for your friends. Help us improve.🙏
#nevent1q…x77l

2026-03-14 15:43:43 UTC

State is a scam. Don’t share their propaganda. Every talking politic is using you as amplifier.

2026-03-11 05:35:11 UTC

Improving app daily. Aim is to build the best tool for onboarding your friends and family into bitcoin.
#nevent1q…hkds

2026-03-11 04:50:37 UTC

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I’m building @npub1kkh…jvz8
Cashu wallet and messenger. Tool for onboarding your friends and family.

2026-03-08 19:57:50 UTC

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Great news. When is the release planned?

2026-03-08 07:32:40 UTC

Anyone willing to test nostr messenger with cashu payments?
https://linky.fit/
I recommend to download PWA

2026-03-08 05:38:40 UTC

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Using default relays. Damus, nos, and primal

2026-03-08 05:37:15 UTC

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After another restart I see 3 messages.

2026-03-08 05:26:18 UTC

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Now I see 👍 reaction

2026-03-08 05:24:54 UTC

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I don’t see the message from you

2026-03-08 05:17:08 UTC

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Have you received my message?

2026-03-08 05:15:42 UTC

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It’s quite long time from my previous test. Now I have to restart the client to see the messages

2026-03-08 05:05:04 UTC

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whitenoise.chat
What are other clients supporting it?

2026-03-08 04:58:22 UTC

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Does it work smoothly to you?
I’m not able to send a message 🤷

2026-03-08 04:35:29 UTC

Running White Noise

2026-03-06 16:16:29 UTC

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Do you have a link?

2026-03-04 04:49:56 UTC

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Interesting how politics can be kind of reasonable when commenting someone else’s politics

2026-03-03 17:53:21 UTC

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Can you list those clients?

2026-02-25 11:45:01 UTC

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Maybe not a good term. But I mean the times when the development is faster and faster. Being sceptic protects you against frauds but also from new discoveries.
Ignoring internet was costly, but not as costly as ignoring bitcoin.

2026-02-25 07:19:39 UTC

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Focusing on negatives is not an advantageous strategy in the technical era.

2026-02-19 16:51:26 UTC

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Ok. Thx. I’ll try it later then

2026-02-19 15:58:03 UTC

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That is exactly one I’m using and here is missing

2026-02-19 15:57:13 UTC

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I don’t see for example gpt 5.3 codex. Which suits me best so far

2026-02-19 14:36:08 UTC

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Thx. But it doesn’t have the newest models

2026-02-19 14:34:52 UTC

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Why?

2026-02-19 14:34:19 UTC

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Looks promising, but still missing the top tier models

2026-02-19 14:29:18 UTC

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All of them are quite weak compared to ie gpt 5.3 codex

2026-02-19 14:17:29 UTC

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No offense, but have you tried it?

2026-02-19 13:36:43 UTC

What is the best way to purchase best ai models for sats instead of medieval KYC fiat?

2026-02-16 11:56:21 UTC

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Frustrating degeneration

2026-02-11 07:10:51 UTC

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It’s already over

2026-01-23 14:26:35 UTC

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It happened to me twice in a row. So I assume it is required always.

2026-01-23 14:16:10 UTC

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Transaction used to be settled in seconds. Now you have to fill in crazy KYC forms for Alza and Confirmo. And then wait circa 24h for their approval

2026-01-23 08:34:42 UTC

Hi,
We probably all expected it to some extent, but it still caught me off guard when Wallet of Satoshi stopped supporting incoming payments to their custodial wallet in the EU. Even more shocking to me was the crippled payment option on Alza. I started dealing with the frustration by vibe-coding an app called Linky - for P2P Bitcoin payments.
It’s meant for managing contacts you know personally and want to interact with freely. The app doesn’t use any proprietary backend, and you can clone it at any time and even run it locally. You always have access to your data. At the same time, you can instantly receive and send Bitcoin. Across different devices, you have the same Bitcoin, which also automatically creates an additional backup. For Bitcoin payments, well-known Cashu mints are used.
I’d be happy if you helped me test it and gradually improve it. A few dozen of you are already actively helping, and thanks to that the app is literally getting better every single day.
Please don’t keep too much money in it. 🙏 If it gets lost, I won’t be able to get it back to you. I don’t see any of your data, so I also don’t have access to your Bitcoin. The app has plenty of bugs! Right now I’m trying to polish the UX, and after that we’ll most likely start rewriting it gradually so it can be relied on.
I call the app Linky, and you can try it out at this link:
https://linky-weld.vercel.app/
I recommend installing it on your home screen as a PWA 🫡

2026-01-12 17:27:47 UTC

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F do C.

2026-01-11 06:13:41 UTC

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What is CT?

2026-01-08 21:37:32 UTC

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It is interesting direction (meaning the self-custody of commerce), but we all must prioritize

2026-01-08 20:57:50 UTC

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I think that Umbrel is close to that:
https://umbrel.com/

2026-01-08 16:05:30 UTC

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All these harming regulations will push us to find better solutions

2026-01-08 15:32:00 UTC

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Tested.. no additional KYC was requested - only delivery address.

2026-01-08 15:24:42 UTC

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Ok, then it sounds really stupid.. Will need to test it..

2026-01-08 15:08:29 UTC

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Give it a try. 😉
I see no KYC request...
https://image.nostr.build/dd2d43351111bdf377b157119b202003068412b0a4a1a69fb97d6a4ee2facf9d.jpg
https://image.nostr.build/e162673b18ecd8437430547dda33d6e3d8cc9866e8d713bc1a35068ad0d12a91.jpg

2025-12-31 08:23:14 UTC

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This!

2025-12-30 11:16:41 UTC

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Ok. Got it

2025-12-30 10:57:26 UTC

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Do you like nostr protocol? I think that existing content shouldn’t be the reason to not be here. You can start creating the better one.
And btw nostr is not only social network…

2025-12-28 12:59:51 UTC

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I did. Thanks. @npub1cm3…96wt is using Spark which is different concept. Interesting one, but currently cashu seems to have a better tradeoff for me.. but definitely checking spark progress 👀

2025-12-28 07:56:56 UTC

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Thank you. And it is priced per token, right? So the amount doesn’t matter.

2025-12-28 06:48:37 UTC

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Thx.. it makes sense.. And is there any mint overview with their fee policy?
It’s probably param `MINT_INPUT_FEE_PPK`?
And the fee applies per token? Meaning it’s more efficient to user bigger amounts?

2025-12-28 06:43:05 UTC

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Could it be applied dynamically? Meaning when is the traffic low then you could swap your tokens for free (or cheaper)?

2025-12-27 19:27:03 UTC

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I’ve never experienced it before, but today from two various mints

2025-12-27 19:15:47 UTC

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I mean cashu ofc. Stupid autocorrect.

2025-12-27 19:07:53 UTC

Cash mints are charging fees even if you transfer within the same mint?
#asknostr

2025-12-27 14:33:02 UTC

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Do you mean in fiat or in bitcoin?

2025-12-27 11:44:06 UTC

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Looks very good.. Thanks.
I’ve been testing it circa year ago, but I didn’t get it’s utility back then.
https://image.nostr.build/e97076813db595ff64e9dba9f8670f1c6459288d52c777e1ba7dad1f170c6288.jpg

2025-12-27 11:42:06 UTC

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Nice.. This looks very good 💪
I currently miss only two small things
1) Ability to use same the account on more devices (mobile and desktop). It works with messages (via nostr), but not with cashu balance. It could be implemented with some local-first protocol. I like https://github.com/evoluhq/evolu most.
2) Using `nsec` instead of words is slightly limiting using other tech - like mentioned local storage, but also bitcoin onchain addressed for example. It could be derived probably even from `nsec`, but it’s not standard.

2025-12-27 10:19:45 UTC

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It’s true that onchain usage is stagnating. But it keeps evolving. Ark and Spark are scaling while using onchain. Even lightning is on one hand reducing the need of many onchain transaction but creating dependency on it at the same time.
Nobody knows what is the reasonable security budget. Maybe it’s still too big.

2025-12-26 20:44:56 UTC

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Thank you. I’ll give it a try 👍

2025-12-26 08:38:24 UTC

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Thx. I’ll have a look 👀

2025-12-26 06:07:46 UTC

Na cashu.me jsem přidal 🇨🇿češtinu, aby to bylo zase trochu přístupnější.
Dejte vědět, kdyby vám tam něco nesedělo 🙏

2025-12-26 05:35:40 UTC

I’ve done some more testing and I wasn’t able to find a solid solution for contact payments - ideally combined with messaging. Do I miss something?
@npub1n03…h0ky @npub17fz…9yxv @npub1wht…r3ec @npub1ref…64x3
https://image.nostr.build/a767ae5ec83f6316c48f811759b85a859651862d8dfa12d6fdd1cd4911eade33.jpg

2025-12-24 11:49:50 UTC

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Nice. Thx

2025-12-23 20:03:57 UTC

Would I be able to interact with @nprofile…sp3z users from its fork?

2025-12-23 19:28:26 UTC

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This always selects Telegram 😞
https://blossom.primal.net/8f8599ecfa4f7becfab5854d6189beaa4373649518d82f612899246df5cf493f.png

2025-12-22 20:21:03 UTC

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OK, it could be.. I just don’t see such option there..

2025-12-22 20:03:00 UTC

What is the meaning of this BTC pill in cashu.me wallet?🤔
https://blossom.primal.net/f3cd171b2d984398692fb546848cf8d1b3c501bcf58faa30ecc581170e0d0fa7.png

2025-12-22 12:08:48 UTC

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Start offering great bitcoin only service. In whatever industry

2025-12-22 05:39:42 UTC

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Super. Díky za tip. Problém tří těles jsem zrovna dočetl.
Bitcoin astronomy je taky reakci na problém tří těles. Ale to určitě znáš.
https://www.unchained.com/blog-tag/bitcoin-astronomy