Hynek

Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

NIP-05 Address

Profile Code

nprofile1qqs03rnx9xejpjpm2kg8tvyy69xqqpp7q8wzq6gc0qkwgr25u5j5m4gpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0ds0avghn

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

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Last Notes

2026-10-15 14:03:42 GMT

🍕 You can now pay with bitcoin at Pizza Scuola in Prague! 🎉
Come give it a try — their pizza is delicious!
https://pizza-scuola.cz
https://image.nostr.build/23ea3c2d1dc59653316c6572b6a7b1736c05faebf9c1d925e9807d67cf0b147b.jpg

2026-10-13 17:24:45 GMT

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Merchant by merchant.

2026-10-13 17:12:32 GMT

Another business in Prague now accepts bitcoin 🎉
Flower shop - Libeňská květinka 💐
https://btcmap.org/merchant/43123
https://image.nostr.build/9f4901f8dc4360f481597babfc639f023dd4147b2fe7a2c2fa76623380c9f30c.jpg

2026-10-01 09:18:31 GMT

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@nprofile…w0lp is similar concept

2026-10-01 09:18:02 GMT

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Fair. We didn’t invent proxy.
Payment takes ~2 min. So it’s not usable in a hurry as of now.
However there is an idea to set a personal bot for payer. You give him limited fiat access and it stacks for you within seconds.

2026-10-01 07:00:30 GMT

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Check the video for the proxy payment demonstration:
https://youtu.be/9zRPQu2SOec

2026-09-29 04:21:22 GMT

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Nice. We’re telling very same story 🤩

2026-09-05 17:53:02 GMT

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Remote signer is not supported yet.

2026-09-04 16:16:17 GMT

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@npub1kkh…jvz8 generates nostr account during onboarding. Actually using npub.cash for lightning address. Using cashu and you can send to lightning anytime. (Hopefully soon even onchain)
Proxy payment is specific feature. Linky stands on trusted connections - friends. We test it now in Czechia only.. There is quite common to pay on eshops via QR - bank transfer - immediate and with no fees to VISA/Mastercard. The proxy payment means that you ask your friends if they could do the bank transfer for you and you give them sats for that.
So your friends stack your sats (when merchants don’t want them) and you can use bitcoin even more and building your network on the way.

2026-09-04 16:09:53 GMT

@npub1jw7…35fg is there an option to use different fiat value than USD?

2026-09-04 08:08:25 GMT

Proxy payments are banger 🔥
#nevent1q…6zdx

2026-08-25 06:05:15 GMT

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Yes. We have similar approach with @npub1kkh…jvz8

2026-08-25 06:02:53 GMT

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Just running node has no power.
Power of nodes is in transactions produced by these runners.
And that is yet another reason to utilize bitcoin.

2026-07-27 13:38:46 GMT

Pojeďte na @npub1fc6…zyq0 ..
Bude to stát za to! Já budu ukazovat, co je nového v @npub1kkh…jvz8 , ale koukněte obecně na program:
https://www.chaincamp.cz/#program
#nevent1q…kpzn

2026-07-23 17:38:42 GMT

Running Buzz

2026-07-22 17:32:32 GMT

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It is still possible in Trezor Suite. Just not straightforward

2026-07-16 16:01:53 GMT

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You can still coinjoin with Trezor

2026-07-09 03:41:52 GMT

Reálně se všichni ještě bank občas dotkneme, ale jde to dobrým směrem. 💪
#nevent1q…l34j

2026-07-08 06:19:01 GMT

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True. Bark looks significantly better. But still not battle tested

2026-07-08 03:15:57 GMT

Seems like spark is being implemented into many apps these days.
I appreciate their work but still it feels like a vendor lock, since there is basically only one spark service provider.

2026-07-05 09:46:41 GMT

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Yes. The same we should apply to solarpunk and lunarpunk.

2026-06-28 09:40:52 GMT

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Reserving mental capacity for more important tasks is the way. 👍

2026-06-27 12:27:26 GMT

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It’s an improvement, but I think that even better would be to start default for the user.

2026-06-17 11:21:53 GMT

NIP-05 seems quite handy for contact management
#nevent1q…pvgz

2026-06-15 17:08:35 GMT

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Good combo

2026-06-15 17:06:28 GMT

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Bitcoin walk, výborně 👏

2026-06-11 08:08:53 GMT

Feels like bitcoiners are finally pushing harder for real world usage of bitcoin 🔥
https://image.nostr.build/8bb7cc9f0a9dd264e3ffd889bcb244d88ed1bb9b7e0c201b1c79a4040c722db9.jpg

2026-06-11 07:13:10 GMT

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WTF? It’s not a bitcoin. Why do you do that?

2026-06-11 06:57:10 GMT

Let’s meet today on @npub167n…zu3r 🔥
 Today I will have a nice panel session with @npub1864…t2tq master - @npub1cn6…wt8a 🚀
Who knows where the discussion will progress, but I would like to discuss mainly bitcoin adoption. Examples what works and what doesn’t. Hope to see you there 🫵
https://image.nostr.build/a45598deab59d25807dcab817e4bfeae9c31f542b36cbf0b4c41c4c1cefd4962.jpg

2026-06-11 06:46:08 GMT

Proč je výhodný platit bitcoinem? Koukněte na přednášku z Cryptobyte na téma bitcoinové adopce. 🚀
https://www.youtube.com/watch?v=WCpVFIAyaZ4

2026-06-10 05:44:32 GMT

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Is it really a blocker?
Cashu/lightning seems quite private

2026-06-10 05:09:50 GMT

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Yes. And no matter what price you expect you always spend the same value in particular moment no matter what the mean of exchange is.
You can always buy more bitcoin if you still have some fiat for spending.

2026-06-10 04:54:38 GMT

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Actually it doesn’t make sense if you understand opportunity cost

2026-06-10 04:47:13 GMT

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Isn’t bitcoin useless if people don’t know how to use it?

2026-06-10 04:23:08 GMT

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Thier’s Law

2026-06-10 04:21:00 GMT

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Make sense. So I will rather focus more on ordinary people without these biases.

2026-06-10 04:04:19 GMT

Why do bitcoiners tend not to pay with bitcoin? Making a bitcoin transaction with an “ordinary” person often seems surprisingly easier to me...
#asknostr

2026-06-09 06:21:40 GMT

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Nice. You can catch me after some of my talks: https://btcprague.com/speakers/hynek-jina/

2026-06-08 14:22:18 GMT

Don’t miss the chance to visit Zlaté Sele during your @npub167n…zu3r trip.
https://btcmap.org/merchant/5710
#nevent1q…d9qf

2026-06-05 06:22:36 GMT

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True, but middle one is still kind of superior since it understands remainder two and not vice versa.

2026-06-01 07:20:15 GMT

73 years ago on this day, politicians robbed the people of Czechoslovakia through the so-called currency reform. Overnight. Today they're smarter and do it gradually.

2026-06-01 07:09:24 GMT

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Everyone wants to prosper → even fools.

2026-06-01 03:21:13 GMT

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Would be cool if regular people prefer bitcoin

2026-05-30 03:36:45 GMT

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Yes. Execution is the difficult part

2026-05-29 03:35:57 GMT

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True, but it’s more healthy to focus on building 🫡

2026-05-29 03:33:27 GMT

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Real life payments - grass-root adoption.
But if you mean technically then for example:
- cashu in secure enclave
- ark
- utreexo - I wish it could enable true LN in phone and then almost forgotten channel factories
Visit @npub16u0…qpwk if you are looking for more inspiration.

2026-05-25 04:19:41 GMT

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Sure. I just miss an option to use custom cashu mint…

2026-05-25 04:18:46 GMT

@npub1m2m…r8p9 is building AnyPay - service to pay any crypto request with ⚡️lightning.
https://anypay.today/
Scan or paste a BTC, ETH (including L2s), SOL, LTC, XMR, ZEC, or DOGE address — your Lightning wallet covers it (including stablecoins).
No account. We don’t have custody, we are only a frontend.
Support provided by the swap services used, not us. We just find a way to pay it.

2026-05-25 04:00:22 GMT

Using KYC is very dangerous. And paying taxes too...
https://www.youtube.com/watch?v=76lucU9xQX8

2026-05-24 05:07:22 GMT

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I use that as a default Lightning address for every new user of @npub1kkh…jvz8
And I’m missing ability to set custom cashu mint.

2026-05-24 04:42:18 GMT

@npub1mhc…c226 do you have some plans with npub.cash?
It’s super useful tool, but development seems to stopped?

2026-05-22 13:49:16 GMT

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I hope so. I believe it’s the best way everyone can benefit from bitcoin

2026-05-22 13:21:14 GMT

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🎯 Yes.
Graham is well misunderstood.
- It says nothing about preferred money. Only that subjective value beats the nominal. And btw there is also effect of Thiers law which works in opposite direction.

2026-05-22 13:15:53 GMT

Exactly. Most people don’t understand opportunity cost.
#nevent1q…lzxw

2026-05-22 12:49:21 GMT

Let's meet on https://pizzaday.cz/ - I will have a workshop on @npub1kkh…jvz8 project there tomorrow.

2026-05-22 07:13:52 GMT

Now with seamless migration from legacy labeling that was dependent on Google or Dropbox. 🚀
#nevent1q…fv28

2026-05-09 04:09:49 GMT

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/

2026-05-06 15:04:35 GMT

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We need to pay with bitcoin

2026-05-01 18:23:05 GMT

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 17:44:46 GMT

Not having control among others is blessing.

2026-05-01 17:35:27 GMT

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

2026-05-01 08:23:30 GMT

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

2026-05-01 06:47:03 GMT

@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 GMT

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

2026-05-01 04:42:25 GMT

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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 GMT

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That sounds frustrating, but got it.

2026-04-30 05:48:28 GMT

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

2026-04-30 05:43:41 GMT

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

2026-04-30 05:02:07 GMT

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 GMT

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 18:52:03 GMT

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Výborně.

2026-04-27 12:44:16 GMT

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Nechceš zítra přinést?

2026-04-25 06:36:24 GMT

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/

2026-04-22 03:51:01 GMT

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Get rid of fiat

2026-04-21 05:33:15 GMT

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How is active address defined?

2026-04-20 08:09:16 GMT

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The same way as always…

2026-04-20 05:53:57 GMT

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Interesting point. I think that it depends on your perception of previous state. If you think it’s evil, you probably want to switch it as fast as possible.
Some people can find evil even diesel cars - I don’t. But fiat system is in my eyes purely evil and therefore I wish bitcoin to voluntarily replace it.

2026-04-19 19:20:50 GMT

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How do you mean that?

2026-04-19 17:31:49 GMT

We are building the best tool for people who don’t even know yet they need bitcoin 😀

2026-04-19 11:55:18 GMT

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Better key storage for cashu wallet - @npub1kkh…jvz8

2026-04-16 07:00:02 GMT

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.

2026-04-12 09:59:28 GMT

I’m trying to find answers for myself to the previously mentioned questions around @npub17fz…9yxv.
Who will operate the mint? Without KYC. It won’t be run by a regulated entity
- Mints already exist - it seems this in itself isn’t such a big problem
How should a mint be selected in the wallet?
- The application can choose a default, but that leads to centralization and additional vulnerabilities.
- Select automatically based on defined parameters? Once the scoring is known, it will likely be attackable.
- The least bad option today seems to be to set some default mint (for example minibits) and allow easy switching. At least experienced users could consider which mint they use. When they then onboard someone, by sending their first cashu token to a friend they also set the first mint for them.
What if a given mint stops working?
- If it’s planned, tokens can be automatically moved to another mint. However, the user needs to at least open the app.
What if users don’t respond to notifications?
- People will lose their funds ⚠️
What if the mint does a rug pull?
- People will lose their funds ⚠️
From this, it follows to me that cashu is a great tool for onboarding new users. However, they should move their funds at the first opportunity or above a certain amount to a sovereign solution. Is that simply on-chain? Or is it better to experiment with Ark, Spark? Or Bitkit/Phoenix?
#note1nky…qqt3

2026-04-09 18:48:45 GMT

I listened to an interesting podcast where they discussed the pitfalls of a cashu wallet and why it’s likely problematic to support it in the Signal app. 
https://fountain.fm/episode/DcrZUespvsWbHL2wvb35
* Who will operate the mint? It won’t be run by a regulated entity without KYC.
* How should a mint be selected in the wallet?
* What happens if a given mint stops working?
* How can users be migrated?
* What if the mint does a rug pull?

2026-04-02 04:01:50 GMT

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 GMT

Embrace the competitors…

2026-03-22 10:38:30 GMT

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Delivery is still demanding…

2026-03-21 22:11:57 GMT

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 GMT

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

2026-03-21 19:34:22 GMT

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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 GMT

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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 GMT

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

2026-03-21 19:06:59 GMT

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

2026-03-21 07:50:20 GMT

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Nice 👏

2026-03-21 07:40:02 GMT

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 GMT

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

2026-03-17 04:34:35 GMT

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You can’t vibe code a plant yet 🙂

2026-03-15 16:01:53 GMT

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Sounds great 🔥

2026-03-15 14:39:17 GMT

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

2026-03-15 14:27:48 GMT

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 GMT

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