Hynek

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

2026-03-11 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.

2025-11-16 18:15:19 UTC

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Ok. Than I will continue reckless 😀

2025-11-01 09:40:50 UTC

I’d like to share a story about adoption with you.
Lately, I haven’t been able to find time for meetups because of family and work, so I decided to focus on lunches instead. In a regular local pub, I asked the owner if he’d be willing to accept Bitcoin. He politely declined.
I kept going there about once a week. After a few visits, I made an NFC card and loaded it with 1,000 sats as a tip. I also gave him a leaflet with instructions on how to access the Bitcoin. He’s an older gentleman, not very interested in technology, and doesn’t have much time for experiments while running the place. The following week, I tipped him another 1,000 sats. On the third week, he finally agreed to let me install a mobile wallet app for him.
Suddenly, he had a bit of Bitcoin in his Wallet of Satoshi. I asked him if I could start paying that way — with the promise that if it didn’t work out, I’d exchange it back into cash for him. He wasn’t too keen at first, but since I was a regular, he wanted to make me happy.
From that moment, I announced in the local Jednadvacet (our Czech version of Einundzwanzig) community that we’d meet for lunch every Thursday. A short meetup — a chance to exchange Bitcoin, learn something new, meet people, etc. The only condition: payment must be in Bitcoin.
Two months have passed since then. The group has been growing. At first, there were just three of us. Last time, there were already seventeen. For the owner, it’s become a significant part of that day’s revenue. He’s started treating us better too — now he greets us from afar and even reserves the biggest table for us every Thursday, not letting anyone else sit there.
Every time I ask him if everything’s okay, if he wants to cash out, or needs any help with it. And you know what he told me last time? That he doesn’t need to — it’s growing nicely in Bitcoin. He even recently bought a fridge with Bitcoin. He said he had to use Lightning because he ran into some issues with on-chain. I never even mentioned the word “Lightning” to him. He’s been learning on his own, and now he’s become quite the Bitcoiner.
It looks like the pub might soon turn into a nice little vexl point — a place where people can exchange Bitcoin for dirty fiat and vice versa.
I’m writing this because I think it’s a great blueprint. It’s short, takes me about an hour a week — time I’d spend on lunch anyway — I meet people, and it helps Bitcoin adoption in a very natural way. Hopefully, it’ll inspire more Bitcoiners to try something similar in their own area.

2025-10-22 07:59:40 UTC

Great video.. I would just add few more options
- @npub1mft…rkl3 is the best for P2P - nonKYC bitcoin
- Conjoin works even with the Trezor hardware wallet - you don’t need to use hot wallet
- Wipe code is more straightforward alternative for trick pins
- Multi-share (aka Shamir/SLIP39) offers better options compared to XOR - you can set the required threshold - so it’s fault tolerant
- Be careful with border wallet.. it’s not a good practice.
- More things are in the pipeline….We can talk about them if you are interested.
#note1due…adfh

2025-10-21 08:48:15 UTC

Trezor Safe 7 is here 🔥
https://trezor.io/

2025-09-13 05:54:19 UTC

Interesting insight from Nepal:
https://xcancel.com/rachinkalakheti/status/1966314602251301138

2025-09-10 06:40:18 UTC

Lidi sedí ve vězení 8-12 let kvůli tomu že pěstovali pár kytek.. Žijeme v absurdistánu… Soudce taky chápe, že to je barbarství, ale stejně je odsuzuje, protože je prostě takový zákon.
Kdo dává přednost zákonu před morálkou…. ...není morální..
Jak chcete jednou svým vnoučatům obhajovat, že “takový byl prostě zákon”?
https://www.youtube.com/watch?v=wqE3E2eHPpo

2025-08-31 07:52:34 UTC

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Nová

2025-08-31 05:44:39 UTC

Znáte někoho ve svém okolí, kdo řeší hypotéky?
Na jaké nejnižší RPSN se dokáží dostat?

2025-08-28 14:58:50 UTC

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Since it doesn’t tell anything about your physical location

2025-08-28 06:11:04 UTC

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You can if it’s #21m 😄

2025-08-27 16:31:23 UTC

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Where we go we don’t need gatekeepers

2025-08-25 04:54:45 UTC

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Onboard into bitcoin as many people as possible as fast as you can.

2025-08-24 14:47:19 UTC

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Good to know. We should hurry up with bitcoin adoption

2025-08-24 13:14:14 UTC

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Cash is the way

2025-08-24 12:39:34 UTC

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Use @npub1mft…rkl3

2025-08-23 14:39:10 UTC

Zásilkovna (also known as Packeta) is a Czech logistics company that operates a large network of pick-up and drop-off points for parcels.
They usually don’t take on another partner business if there’s already an underutilized location nearby. The idea is to make sure each partner has enough customers so that the cooperation remains attractive.
If we convince a business to start accepting bitcoin, it might not be desirable to recruit another business in the same area until the first one gets enough traffic. Otherwise, they might struggle to use bitcoin effectively and could even end up turning away from it.

2025-08-17 04:03:27 UTC

Doesn’t it seem a bit strange to you that in the age of AI we still have so many ideas that haven’t been implemented yet? And that it will probably take years before they are?
For example Ark, Channel factories, … and many others.

2025-08-15 07:02:37 UTC

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But was it fun?

2025-08-12 20:11:54 UTC

We should use bitcoin everywhere 🔥
Here are some reasons if you need an ammo:
https://www.youtube.com/watch?v=Zag0_ZescDY

2025-08-09 20:53:35 UTC

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This one is great. Built by @npub1cpr…pg42

2025-07-25 11:31:38 UTC

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Good point. 💪

2025-07-22 06:22:01 UTC

The man who planted trees can be you — but instead of seeds, you can orange pill your neighborhood and make it blossom.
https://www.youtube.com/watch?v=epTqUnKsuUY

2025-07-21 16:27:12 UTC

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Bitcoin will surprise all of us 😊

2025-07-16 18:47:51 UTC

We're improving fee rate predictions in Trezor Suite:
- More frequent data refresh
- Precision to two decimal places
- Soon, you'll be able to make transactions below 1 sat/vB

2025-07-15 17:40:19 UTC

It is happening 🎉
https://stacker.news/items/998229/r/hynek

2025-07-04 11:03:27 UTC

Is there some private electricity provider accepting bitcoin? The state version obviously doesn’t work 🫠

2025-07-04 09:43:23 UTC

Let’s imagine we’re living 30 years ago and going around trying to explain to people how email will change the world. Who would even care? We could even tell them how to set it up, but that would be pointless too. However, if during collaboration we mention that we’ll send the info via email and act like they’re Neanderthals for not knowing what it is… maybe after a few iterations, they’ll start getting interested. I remember many companies trying to figure out how to make a website—just so they wouldn’t fall completely behind.
We should approach bitcoin adoption the same way. Don’t explain anything—just require bitcoin for collaboration.

2025-07-02 20:12:32 UTC

Have dignity and always demand payment in bitcoin for your work.

2025-07-02 06:45:19 UTC

Do you think we can catch up over the summer on what we neglected because of school?
https://image.nostr.build/7507c564ff97d1c294334886599fb7ee206bf2b897354cca62a52ccc8e72dcf8.jpg

2025-07-01 07:37:23 UTC

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UTXOs

2025-06-18 19:56:38 UTC

Bitcoiners look like a honeypot... But if @npub1myv…n5t5 can be realized, then on the contrary, the aggressor will become increasingly more and more afraid to attack a bitcoiner.

2025-06-06 07:44:10 UTC

My new daily routine is to read @npub1lxk…5xlc ’s comments on SN. 🍿
Here is the handy link:
https://stacker.news/DarthCoin/all

2025-05-31 06:15:12 UTC

**Your wealth is fading silently **
The obsession with "store of value" alone isn’t healthy. It’s much better to embrace all three characteristics of bitcoin at once.
- 💭 Think in bitcoin, so you get real insight into how the value of your assets is evolving.
- 📈 Save in bitcoin, so you don’t lose your wealth.
- 💪 Pay in bitcoin, so no one can stop you from doing so.
Read the full article here:
https://github.com/hynek-jina/Hynek/blob/main/blog/Your%20wealth%20is%20fading%20silently.md
…and let me know in the comments what you think.

2025-05-30 14:03:56 UTC

Is there any browser extension or something that would replace any X link to xcancel link?

2025-05-02 16:56:31 UTC

I got an offer today to give a keynote at ETHPrague on topic "What I don't like about Ethereum"...
I'm actually kind of tempted.. 🤔
It’s a distraction, but could be fun…

2025-02-22 07:31:57 UTC

ETH price denominated in real money in last year…
It is more than 50% loss.. But ethereans get circa 5% back in staking 🎉 https://image.nostr.build/85c34d29fd294e51a5d9cf343cf8a6a882042a88933a4b0aa4f5556b63e2532b.jpg

2025-02-10 20:05:49 UTC

I still don’t get the DCA.
Why would you keep holding the fiat?

2025-01-13 07:04:21 UTC

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Can you share more insights?

2024-12-31 09:04:24 UTC

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Which one do you recommend?
I don’t see it formatted on Damus, Coracle, noStrudel, nor Primal…

2024-12-08 08:36:04 UTC

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Mimochodem ta výměna displeje není tak složitá jak jsem se obával. Zachráníš tím bitcoin i ten mobil..

2024-09-14 07:27:29 UTC

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That sounds terrifying 🫣

2024-09-13 09:44:21 UTC

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I don’t see the direct link to my points.
1. Fees go to Functionaries, right? Or maybe to Federation members, but it doesn’t make huge difference..
2. I agree that Liquid federation might be the best federation in the space, but still. Any 5 of them can steal all the funds. If government will push, they can do whatever they want with Liquid - and all the locked bitcoin.
3. Ecash is not that mature and anyone can steal there.. But we can build tools to make it inefficient. And it can be way more resilient.

2024-09-08 19:42:39 UTC

Na @npub1fc6…zyq0 je vypsaných spoustu nových workshopů. A mám docela problém. Jednak budou určitě často už obsazený a taky je občas poměrně těžký se rozhodnout, kterému dát přednost..
No a tak než pojedu do Ostravy, tak si jdu kroužkovat jako Jiřina Bohdalová před tím než jde do Penny.
1. Michal Novák - Taproot assets - Stable coins na LN - Stable coiny jsou podle mě distrakce, ale vím, že Michal je hooodně chytrý. Navíc tam můžou být zajímavé informace i o lightningu samotném
2. Tomáš Sušánka - Základy kryptografie pro bitcoin - To doporučuji už jenom proto, že Suši je můj šéf v Trezoru. 🙃 Pokud nevěříte, že to bude skvělý, tak se podívejte na jeho přednášku na podobné téma z letošního BTC Prague 🤯 Velmi jednoduché a užitečné pro chápání souvislostí.
3. iWarp - Cashu a ecash nad LN - Na tenhle workshop bych chtěl hodně jít. Ecash je kontroverzní. Mám k němu milion výhrad, ale zároveň v tom vidím obrovský potenciál. Hlavní problém pro mě je, že tou dobou povedu workshop o UTXO managementu, tak se můžete stavit i za mnou, pokud bude na ecashi plno…
4. Josef Kříž - Nostr - Nostr asi tady na nostru všichni znáte,.. ale Pepa by mohl dát praktický tipy, jak ho použít v dalších aplikacích..
5. Michael Haase - Úvod do světa multisig peněženek - Bohužel se to kryje s Pepou, tak nevím kam se budu nakonec snažit dostat víc. Michael to bude mít určitě velmi pečlivě zpracovaný a má veliký přehled.
Spoustu dalších workshopů bych taky velmi doporučil i navštívil.. Záleží, co vás zrovna zajímá - nejde sledovat úplně všechno.. Snažil jsem se jich vybrat jenom pár, aby byla šance, že si to vůbec přečtete..
Co doporučujete vy? https://image.nostr.build/b41bb4995d15690e44ebf2d46149f8b78467b49ba967ae952bbf52bc9401cab1.jpg

2024-09-03 04:44:42 UTC

Beautiful research about #bitcoin scaling. 👏
Eventhough I think we need more than one transaction per user and year..
https://petertodd.org/2024/covenant-dependent-layer-2-review

2024-08-19 09:05:12 UTC

Trezor Suite from 24.8.1 supports full RBF.
All transactions has RBF enabled and we ignore RBF flag. So you can overwrite any pending transaction.

2024-08-19 08:56:09 UTC

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There are many more levels

2024-08-10 05:01:18 UTC

I’m playing with various lightning wallets and being triggered with small dust amounts there when I’m done.
Is there any way to withdraw all or do I have to manually keep lowering the amount sat by sat?

2024-08-06 05:07:45 UTC

What is your current favorite nostr messaging client?
@npub1h0u…rwx8 and 0xchat.com look promising…

2024-08-06 04:44:42 UTC

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It ain’t much, but it’s honest work 🙂
Congratulations 👏

2024-07-26 11:54:40 UTC

SatoshiLabs created the BIP-39 standard years ago, which is now used by virtually the entire industry. However, with the new Trezor Safe 5, we have switched to SLIP-39 - which uses 20 words.
It's a change that allows anyone to subsequently switch to multi-share. Plus, it's faster to enter, words are harder to confuse, errors are easier to spot, and overall it's just better 🚀
https://content.trezor.io/slip39

2024-07-20 04:09:28 UTC

We have simplified the flow in Suite 24.7.1
You don't have to think of the passphrase right away, but you turn it on in the top left corner when you're ready. And we've added better explanations, too.
We've also added better instructions for remembering your wallet. You can still see your balances after you unplug the Trezor. You just won't be able to sign the transaction, of course. https://image.nostr.build/b090e77b1d13cb5cf7501eb32a0b770e80d90e486f405c6bdcf155376e0b6b16.jpg https://image.nostr.build/e6c8358f13e3be0aad58f1b0b64a481aa51c536b13e598d644d4ccfc43e79524.jpg

2024-07-13 12:45:31 UTC

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Is the code public?

2024-06-24 18:17:13 UTC

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Tady asi jediné video, kde #bitcoin skoro vůbec neřešíme..
https://www.youtube.com/watch?v=P6PVMF--JxQ&list=PLzzgcGPTEzHtifUquXGFmZ7vTApbm87AI&index=15

2024-06-24 13:08:57 UTC

🥖 Rohlik možná bude brzy přijímat platby bitcoinem… 🚀
https://x.com/tomcuprcz/status/1805195028827947264

2024-06-23 19:21:21 UTC

Dneska jsem se dozvěděl, že už jsou venku přednášky z Cryptobyte konference.
Měl jsem tam přednášku o školování bitcoinu:
https://www.youtube.com/watch?v=f7HCuFVPios
A taky jsme si povídali v panelovce o lightningu s Gordym, Michalem (@PlatbyBudoucnosti) a Petrem Lukáčem
šhttps://www.youtube.com/watch?v=RZqWvbQvOtQ

2024-06-23 07:19:38 UTC

What a reckless times when it is easier to test on main net 🙂

2024-06-21 18:04:54 UTC

What is your best candidate for scaling #bitcoin?
https://youtu.be/FdtgU9TptFo?si=PObfJQ02N8ug1o5h

2024-06-13 18:08:59 UTC

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Part of the problem is that it is almost impossible to tell.

2024-06-10 09:03:45 UTC

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It’s more about disbelief in governments than math…

2024-06-10 07:20:03 UTC

I would like to express my gratitude for the way the guys @npub137x…z69c and @npub1f40…jn7l have started a bitcoin conference on a global level 💪
Overall level off bitcoin adoption in Czechia is amazing btw.
Even people who don't come to the conference might know that there's a growing alternative to fiat injustice here.
Bitcoin shouldn't just be for some elite. Bitcoin is the gospel. Gospel means spreading the good news.
Today we have the good news that there is a marathon of inspiration ahead of us - @npub167n…zu3r 🚀

2024-06-10 04:27:34 UTC

Jak malá by musela být účast ve volbách, abyste si řekli, že to vlastně nemá váhu? Že vlastně takový mandát politiky k ničemu neopravňuje?
Voleb do Evropského parlamentu se účastnilo rekordních 36,45 %. V předchozích letech to bylo ještě míň. Z toho navíc 11,12 % hlasů propadlo.
Pro variantu Běžte do háje se letos vyjádřilo 63,55 % .. Plus 2 426 hlasů pro Urzu - Nevolte.

2024-06-06 17:48:32 UTC

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Nice. Can you share more?

2024-06-06 17:47:34 UTC

Rozhovor s Gorrdym o Jednadvacet…
https://open.spotify.com/episode/0a5bXRjMJf8xWBn571PJaC?si=kG4ME9gfTE2v6l-2tbNbvQ&context=spotify%3Ashow%3A2CGjpt1kz3WAfYg4NICdE4

2024-06-03 14:48:36 UTC

V pátek se mnou vyšel rozhovor o Jednadvacet..
https://www.investicniweb.cz/investice/alternativy/hynek-jina-jednadvacet-spousta-lidi-je-stale-ochotna-vzdavat-se-bitcoinu-za

2024-05-21 15:11:54 UTC

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Thank you. So what is the least bad scaling solution from your perspective?

2024-05-17 19:26:04 UTC

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Did he succeed?

2024-05-11 11:20:34 UTC

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What is your current way of thinking?

2024-05-03 15:29:47 UTC

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Fedimint is privacy layer, but the trade-off is in security

2024-04-24 04:36:06 UTC

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Trezor wen?

2024-04-22 12:10:39 UTC

## Changes in Last mile states could take place in three phases
1. Updates - UTXO owner (Alice) collects change requests from all previous recipients.
2. Notice - Alice constructs a modified `status` transaction that is shared with all recipients. It also sends them their `defense` transactions.
3. Valid - previously constructed transactions become valid. At the same time, the previous transactions stop being valid.
In other words in one moment there is valid state 1. Alice is announcing state 2 and collecting updates for state 3. https://image.nostr.build/db5f46b22d6f8e286861290d35d293bdd6b22bd1d58b56c181aa3e85050564e9.png

2024-04-12 21:08:55 UTC

Do you know about handy library that would help with #nostr and #bitcoin keys and addresses derivations?
And is this schema true?
(Meaning that you could derive nsec from bitcoin seed and vice versa?)
#asknostr https://image.nostr.build/e5d8fb81685e10d34deec029e2480173b71b2a4261db218d024d88e9a17c614d.png

2024-04-08 16:29:31 UTC

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Nice 😊

2024-04-06 06:39:25 UTC

Is there such a thing as an inverse timelock in #bitcoin?
A condition that a given transaction is only valid if it is mined before a certain block height?

2024-04-01 20:02:37 UTC

I love lightning, but it’s very frustrating at the same time. It’s simply cheaper to use custodians.. and I believe that it isn’t necessary. The crucial part of sovereignty is ability to sign the message. Which doesn’t require any costs. Therefore I believe that there is some way how to make self-custody fast and cheap. And here is my current way of thinking. This approach is kind of naive but maybe there is some potential. Maybe it motivates you to improve it into something even better.
https://stacker.news/items/489877/r/hynek

2024-03-11 09:24:47 UTC

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Tu úplně základní pravdu jsem nezmínil takhle naprimo. Ty libertariani to snad všichni ví

2024-03-11 07:16:53 UTC

Jak bitcoin chrání svobodu a jaké jsou možnosti jeho používání? Žádná veliká překvapení pro lidi, se kterými jsem měl možnost někdy mluvit 🙂
Můžete to použít pro rovnání vlastních myšlenek. A nebo jako materiál pro někoho, kdo se na #bitcoin stále neměl čas podívat.
Samotná přednáška je cca 20 minut.
https://youtu.be/tSiKNOkAkWs?si=NKmFZE3G9fVRw8ef

2024-03-05 17:01:50 UTC

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Krtek je shitcoiner?

2024-03-04 09:26:55 UTC

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https://jednadvacet.org/je-na-case-platit-bitcoinem/

2024-03-04 09:05:56 UTC

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Everyone needs to eat. Therefore spend some #bitcoin

2024-02-26 09:28:58 UTC

These fee rates announce coinjoin time 🚀

2024-02-04 06:59:07 UTC

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Available for iOS: https://testflight.apple.com/join/92K4nHPd
And Android: https://play.google.com/store/apps/details?id=com.hynjin.lotesapp

2024-01-05 13:40:38 UTC

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Ale je to souboj titánů 🙂

2023-12-27 07:15:17 UTC

Don't buy #bitcoin if you want to make money on it and exchange it back into fiat. You're basically trying to rip someone off, and more likely someone will rip you off.
Buy bitcoin if you believe, as I do, that it is money for the foreseeable future. A fairer money that will replace government money.

2023-12-19 20:54:04 UTC

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You have to trust them..
You can’t swap bitcoin directly to liquid, but ok.
Is there a way how to play with it on testnet?

2023-11-29 16:13:54 UTC

https://stacker.news/items/332759/r/hynek

2023-11-10 07:56:48 UTC

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With every device that needs a battery, the reward increases for someone who can solve this problem..
It’s a beautiful bounty program 🙂

2023-11-08 08:03:20 UTC

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This is cool service too… However few cons from my perspective:
- KYC → that really sucks
- It's a one-time transaction. You can’t reuse the code and therefore it is expensive
Basically it serves slightly different purpose.. To buy bitcoin.

2023-10-24 10:50:50 UTC

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It shows relative change.. It doesn’t matter if the price increases by 10k.. but percentages matter. You cannot simply compare absolute prices of various assets.

2023-10-19 15:26:22 UTC

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What matters is what's moral, not legal!

2023-08-27 05:31:13 UTC

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The money in your bank account
- is not your money
- is not money
- is not
No my idea, but I kind of like it 🙂

2023-08-23 19:15:30 UTC

Is there anyone testing https://simplex.chat/ ?

2023-08-02 14:37:38 UTC

Is Lina Seiche already on #nostr? https://cdn.nostr.build/i/41cdfda2910eca525c22bca61f7faaeb7077f8beedd5f488bf1a2b3ede63c80b.jpg

2023-07-31 19:33:36 UTC

## How to get your first #bitcoin?
1. Do not sign up for any exchange or other service that asks for personal information and documents.
2. Actually don’t use bank transfers either.
3. Bitcoin ATMs are fine, but quite expensive.
4. Getting paid directly with bitcoin is perfect, but it took me about two years to talk someone into it.
## So what's the best way to do it?
Find a person who already has bitcoin and ask them to sell you some. I'm sure he can answer most of your questions and you'll learn a lot very quickly.
It can be someone who is mining, getting paid in bitcoin or simply early adopter who needs to eat.
Do it first with just a small amount through the Lightning Network - that means "no fees" in simple terms for you.
If your friend starts recommending something other than bitcoin, be very careful. And you'd better ditch it altogether.
If you don’t have anyone in your network have a look on @npub1mft…rkl3

2023-07-31 07:15:56 UTC

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Start with why..
https://www.youtube.com/watch?v=tWub0qtlk9s