Hynek

Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

NIP-05 Address

Profile Code

nprofile1qqs03rnx9xejpjpm2kg8tvyy69xqqpp7q8wzq6gc0qkwgr25u5j5m4gpzemhxue69uhhyetvv9ujumn0wd68ytnfdenx7qguwaehxw309ahx7um5wghxy6t5vdhkjmn9wgh8xmmrd9skcrv7pfu

Publishing to

relay.nostr.info

nostr.bitcoiner.social

Author Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

Show more details

Last Notes

2026-10-15 14:03:42 UTC

🍕 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 UTC

- reply

Merchant by merchant.

2026-10-13 17:12:32 UTC

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 UTC

- reply

@nprofile…w0lp is similar concept

2026-10-01 09:18:02 UTC

- reply

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 UTC

- reply

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

2026-09-29 19:12:31 UTC

After a year.. I’ve finally uploaded the story on @npub1jfu…m0gx
https://stacker.news/items/1584550
#nevent1q…mm6q

2026-09-29 19:06:49 UTC

- reply

This is edited photo from the first day.
https://image.nostr.build/a769dacba78ecc5a6c21bfb52c6ff6be7e2349e12454a4d11f1c71fb86722269.jpg

2026-09-29 04:21:22 UTC

- reply

Nice. We’re telling very same story 🤩

2026-09-05 17:53:02 UTC

- reply

Remote signer is not supported yet.

2026-09-05 17:48:02 UTC

- reply

Czech crowns (CZK) would be nice

2026-09-04 16:16:17 UTC

- reply

@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 UTC

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

2026-09-02 17:30:50 UTC

Ahoj,
jako spoustu lidí přede mnou bych vás chtěl také pozvat na @npub1fc6…zyq0. Vnímám to jako nejlepší komunitní akci pro získání cenných kontaktů.
Nyní píšu hlavně kvůli @npub1kkh…jvz8 - peněžence, kde můžete získat bitcoin soukromě od přátel, když za ně zaplatíte bankovním převodem - funguje to prakticky na kterémkoliv eshopu. Nepotřebujete email ani telefon. Stačí vám poznat skutečné lidi, kteří dávají přednost platbě bitcoinem. Věřím, že takových lidí bude na Chaincampu (a na Plan B) požehnaně.
Pojďte budovat svoji bitcoinovou síť 🔥
Linky skupina - https://signal.group/#CjQKIJKUyBsblgjCdYXJ4WOrI6s8u7uuYsip0oUIIBkIlEl9EhCH7JDQ13hWRWNZ5RkQeLJV
Lístky se slevou - https://www.chaincamp.cz/?promo=21CZ
Web - https://linky.fit/
https://video.nostr.build/bc20a771a2a38afbb36a5b551ca626060c62712d2b8ac9efc65b11db0f7902d4.mp4

2026-07-27 13:38:46 UTC

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 UTC

Running Buzz

2026-06-27 12:27:26 UTC

- reply

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

2026-06-11 08:08:53 UTC

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

2026-06-11 06:46:08 UTC

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 UTC

- reply

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

2026-06-10 05:09:50 UTC

- reply

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 UTC

- reply

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

2026-06-10 04:47:13 UTC

- reply

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

2026-06-10 04:23:08 UTC

- reply

Thier’s Law

2026-06-10 04:21:00 UTC

- reply

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

2026-06-10 04:04:19 UTC

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 UTC

- reply

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

2026-06-08 14:22:18 UTC

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

2026-06-01 07:09:24 UTC

- reply

Everyone wants to prosper → even fools.

2026-05-29 03:35:57 UTC

- reply

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

2026-05-24 04:42:18 UTC

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

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

- reply

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

2026-05-01 08:23:30 UTC

- reply

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

2026-05-01 05:39:59 UTC

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

2026-04-30 05:56:48 UTC

- reply

That sounds frustrating, but got it.

2026-04-30 05:43:41 UTC

- reply

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

2026-04-27 18:52:03 UTC

- reply

Výborně.

2026-04-27 12:44:16 UTC

- reply

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/

2026-04-20 08:09:16 UTC

- reply

The same way as always…

2026-04-20 05:53:57 UTC

- reply

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 UTC

- reply

How do you mean that?

2026-04-19 17:31:49 UTC

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

2026-04-19 11:55:18 UTC

- reply

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.

2026-04-09 18:48:45 UTC

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 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

2026-03-21 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

- reply

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

- reply

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

2026-03-21 19:23:32 UTC

- reply

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 07:40:02 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

2026-03-15 16:01:53 UTC

- reply

Sounds great 🔥

2026-03-15 14:39:17 UTC

- reply

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.

2026-03-08 19:57:50 UTC

- reply

Great news. When is the release planned?

2026-03-08 05:05:04 UTC

- reply

whitenoise.chat
What are other clients supporting it?

2026-03-08 04:58:22 UTC

- reply

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

2026-03-06 16:16:29 UTC

- reply

Do you have a link?

2026-03-03 17:53:21 UTC

- reply

Can you list those clients?

2026-02-25 11:45:01 UTC

- reply

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

- reply

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

2026-02-19 16:51:26 UTC

- reply

Ok. Thx. I’ll try it later then

2026-02-19 15:58:03 UTC

- reply

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

2026-02-19 15:57:13 UTC

- reply

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

2026-02-19 14:36:08 UTC

- reply

Thx. But it doesn’t have the newest models

2026-02-19 14:34:52 UTC

- reply

Why?

2026-02-19 14:34:19 UTC

- reply

Looks promising, but still missing the top tier models

2026-02-19 14:29:18 UTC

- reply

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

2026-02-19 14:17:29 UTC

- reply

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

- reply

Frustrating degeneration

2025-12-31 08:23:14 UTC

- reply

This!

2025-12-30 11:16:41 UTC

- reply

Ok. Got it

2025-12-30 10:57:26 UTC

- reply

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

- reply

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

- reply

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

2025-12-28 06:48:37 UTC

- reply

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

- reply

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

2025-12-27 19:31:26 UTC

- reply

And some wallets don’t work with it.

2025-12-27 19:27:03 UTC

- reply

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

2025-12-27 19:15:47 UTC

- reply

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

- reply

Do you mean in fiat or in bitcoin?

2025-12-27 11:44:06 UTC

- reply

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

- reply

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 11:10:52 UTC

Why @nprofile…rpsu doesn’t use gift-wrapped messages?

2025-12-27 10:19:45 UTC

- reply

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

- reply

Thank you. I’ll give it a try 👍

2025-12-26 08:38:24 UTC

- reply

Thx. I’ll have a look 👀

2025-12-26 08:37:54 UTC

- reply

You have a contact list and you can send sats directly to them without other communication

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

- reply

Nice. Thx