Hynek

Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

Profile Code

nprofile1qqs03rnx9xejpjpm2kg8tvyy69xqqpp7q8wzq6gc0qkwgr25u5j5m4gpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsq3vamnwvaz7tmjv4kxz7fwxpuxx6rpwshxxmmdqyg8wumn8ghj7mn0wd68ytnvv9hxgqgswaehxw309ahx7um5wgh8w6twv5x3wrtg

Publishing to

Author Public Key

npub1lz8xv2dnyryrk4vswkcgf52vqqzruqwuyp53s7pvusx4fef9fh2s7hh86s

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Last Notes

2026-01-24 11:10:08 UTC

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I’m trying to build an alternative. But in terms of decentralized tools, not retail store itself 🙂

2026-01-24 10:49:06 UTC

Keep growing 🌱
#note1dnc…aypr

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 🫡

2026-01-21 06:08:12 UTC

I’ve written proposal for promise payments between known contacts - Credo.
Kind of fractional reserves for plebs.
https://github.com/hynek-jina/linky/blob/main/Credo.md

2026-01-16 11:01:27 UTC

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Yes

2026-01-12 17:27:47 UTC

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F do C.

2026-01-12 17:27:27 UTC

Mmgtew c xds

2026-01-11 06:13:41 UTC

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What is CT?

2026-01-10 09:48:12 UTC

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True, but doesn’t it work in both ways?
Incetives work better with bitcoin → people are less dump after discovering bitcoin.

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

2026-01-07 05:21:00 UTC

I’ve created an app for myself to manage Lightning contacts, but maybe some of you could find it useful as well. I’d like to test it primary with newcomers.
#note193e…c89h

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 19:31:26 UTC

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And some wallets don’t work with it.

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 11:10:52 UTC

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

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 08:37:54 UTC

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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

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Nice. Thx

2025-12-23 20:48:46 UTC

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I don’t know about any serious fork.. But I want to understand how it works.. So the question is how much is the protocol independent on specific app. Since there are no metadata?

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

2025-12-23 05:53:00 UTC

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Ah. Got it. Thx

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

2025-12-21 20:08:24 UTC

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- It doesn’t seem sufficiently explored. When I tried to understand it, it felt like transaction trees keep growing and can’t be merged together.
- The WoS implementation reuses the same address. Anyone who pays you once can read your entire transaction history.
- I’m worried about centralization. Overall, I have the impression that it lacks a bit of honesty - it doesn’t have good documentation, yet it’s already in production in several applications that charge fees for it.
But these are more impressions than solid conclusions… I’ll need to study it more thoroughly.

2025-12-20 22:52:29 UTC

After some research I feel that cashu is the next starting point for newcomers. I have tested Zeus, Cashu.me, eNuts, Minibits, Sovran, Nutstash, and Macadamia. Each of them have some nuances, but none of them fit to my needs.. or rather needs that I observe around me.
## What do I want from a wallet
- Trust in long live maintenance
- Reliability without significant UX changes in time
- Data storage - not losing cashu tokens, nor contacts
- Generate automatically 12 words on the background and utilize it for nostr, evolu?, and even onchain addresses potentially
- Enforce words backup when reaching predefined threshold - ie 1 000 000 sat
- Automated mint selection
- Either based on first receive or from nostr ratings
- Automated contact creation
- Ideally LN address (from preselected mint), but even npub can be sufficient
- Localization
- Fiat rates and translation for small countries
- Direct flow for send and receive
- No selection between cashu, LN, onchain, scan/NFC, …
- Aways go with lightning executed via cashu

2025-12-20 09:15:02 UTC

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I don’t know yet. VPN helps or you can still use POS or LN address to receive. But future is unknown and not pleasant for normies.
Proposed Spark has very very bad privacy as of now. Basically anyone who pays you can read your whole transaction history. But it can be improved.

2025-12-20 09:04:42 UTC

Finally we have a motivation for upgrade on another level
https://blossom.primal.net/ed285a6eaca450d969c4c7f3ea0bcbd9db36857f49ffb6aedc74685f5fd95264.png

2025-12-17 15:57:22 UTC

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Yes 🙂

2025-11-19 06:50:12 UTC

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Sorry there is mistake in article. Will be updated soon.
Bootloader is signed with ed25519 not ecdsa

2025-11-19 05:18:09 UTC

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The Trezor Safe 7 boardloader uses a hybrid scheme:
Signed with both SLH-DSA and ECDSA (secp256r1).
The ECDSA signature also signs the SLH-DSA signature.
It is described in more technical details here https://trezor.io/guides/trezor-devices/trezor-safe-7/going-quantum

2025-11-17 08:32:24 UTC

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I made a typo in the link. Here is the correct one..
https://docs.wasabiwallet.io/using-wasabi/RPC.html#payincoinjoin

2025-11-16 18:15:19 UTC

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Ok. Than I will continue reckless 😀

2025-11-16 17:25:04 UTC

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Nice, thx

2025-11-16 16:56:52 UTC

Is there any testnet coinjoin coordinator?
#asknostr #asknostr

2025-11-16 08:04:13 UTC

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Some are Peter Horvath. Some are Jan Novák. But we are all Satoshi

2025-11-16 07:53:24 UTC

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But generally even save and get privacy

2025-11-16 07:52:29 UTC

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Actually overpaid because of small amounts and resulting dust 😀

2025-11-16 06:11:34 UTC

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Would be nice to have a UI for it.
- Basically send as is - just use conjoin
- Maybe offer rounding of amounts to standard denominations…
Next time I will test batch transaction… 👀

2025-11-16 05:46:41 UTC

Payincoinjoin with Wasabi is nice.. and works 👏
Ihttps://docs.wasabiwallet.io/using-wasabi/RPC.html#payincoinjoin

2025-11-14 05:14:43 UTC

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This is cool but more relevant is how many people are already willing to pay with bitcoin. Not messing with fiat 🚀

2025-11-13 17:56:58 UTC

Czech Nation Bank is buying bitcoin..
https://www.cnb.cz/en/cnb-news/press-releases/The-CNB-creates-a-test-portfolio-of-digital-assets/
Hurry up, the race is on. Don’t let the bitcoin be eaten by institutions 🔥

2025-11-11 06:38:07 UTC

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Great news. We just need more people willing to pay with bitcoin…
#nevent1q…yvv9

2025-11-08 16:08:32 UTC

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You can run LNbits on your node.
Purpose of nfc is that you can reuse it. Meaning top up again. But for one time action is ok to use just printed qr

2025-11-08 07:34:32 UTC

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I’ve bought NTAG216 cards and record LNURLw on them:
#note1rld…hx08
Easiest is to use https://lnbits.com/
Btw. I’ve prepared mobile app to make it simpler, but it’s not maintained now.. https://github.com/hynek-jina/lotes

2025-11-08 07:31:20 UTC

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Yes… waiting is fine too.
It’s just not my way — I’ve spent years trying to help people around me, and it’s paying off.
I see many happy people whom I’ve even kind of pushed toward bitcoin, and I’ve even shared part of the risk with them.

2025-11-08 07:27:19 UTC

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Privacy coins have other downsides. There are many trade-offs. And I think it’s better to go with bitcoin from very first moment.
There are private ways how to use bitcoin.

2025-11-08 07:22:48 UTC

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Right, it’s not perfect. However you can use it private way.  And monero has other problems that are not that easy to resolve.

2025-11-06 08:16:10 UTC

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This is really great initiative. Do you have some respond from Signal? Are they interested somehow?

2025-11-03 03:42:58 UTC

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Yes. That would be nice. But Trezor doesn’t want to support it. So I’m glad that it even works

2025-11-03 03:41:06 UTC

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I think it works

2025-11-02 17:41:22 UTC

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I can’t find the guide, but basically you need to run Trezor Suite from terminal with additional params like:
`
open /Applications/Trezor\ Suite.app --args --state.wallet.coinjoin.debug.coinjoinConfigOverride.btc='{"affiliationId":null,"coordinatorUrl":"https://btcpay.kruw.io/plugins/wabisabi-coordinator/wabisabi/%22%7D'
`

2025-11-02 16:35:52 UTC

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You can use @nprofile…fyt7 for whatever you want. Even monero

2025-11-02 15:49:47 UTC

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Yes. Please do so

2025-11-02 15:49:13 UTC

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Good slides. But you can still use conjoin with Trezor

2025-11-02 05:50:31 UTC

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Interesting. Thx for the link. Seems like the market reacts really to anything.
I got the feeling that the bitcoin adoption is more about existing bitcoiners. That we must first truly want to use it everywhere.

2025-11-02 05:13:36 UTC

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Can you tell me more about your recommendation?

2025-11-02 05:09:19 UTC

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Do you mean https://twentyone.world/ ?

2025-11-02 05:07:27 UTC

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Great 👏 that was fast

2025-11-01 20:18:30 UTC

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You never know everything. It is completely fine to not know if you are honest

2025-11-01 19:40:11 UTC

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What slows you down?

2025-11-01 19:38:51 UTC

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Thx, we are all Satoshi 🫡

2025-11-01 11:27:04 UTC

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Yes. It’s here https://btcmap.org/merchant/node:1392150444

2025-11-01 10:05:40 UTC

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Yes. This one is in Prague.

2025-11-01 10:00:54 UTC

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It was divided in more visits, but basically yes.

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.

2025-10-29 06:06:24 UTC

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It sounds like a joke, but I really don’t like how it narrows my vocabulary…

2025-10-29 06:04:25 UTC

Classic postcards with custom photo. Send from anywhere to anywhere. Paid by bitcoin ⚡️
https://bitcoinpostcards.net/

2025-10-22 09:19:54 UTC

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This might be the last drop for me. Duck this crab 😀

2025-10-22 09:18:50 UTC

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Good for you. I’ll need to change mine

2025-10-22 08:05:25 UTC

Can you type a swear word using swipe typing?
On my iPhone, it keeps autocorrecting everything — in every language.
For example, in English, instead of “fuck,” it always writes “duck.”
And it won’t let me type any word like that at all…
Swear words have their place, and this Orwellian bending of reality drives me crazy — it just makes me need to use those words even more. 🤬

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 17:25:28 UTC

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Mindset from adoring no usage to quite opposite approach.

2025-10-21 15:24:57 UTC

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Don’t blame the tool for stupid action

2025-10-21 08:48:15 UTC

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

2025-10-20 04:38:08 UTC

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[email protected]