thedavidcoen
David Coen

Author of Q/A about Bitcoin, SW QA Tester and Support for EdgeWallet.
Donations:⚡️ donate@btcpay.davidcoen.it
Useful links: https://links.davidcoen.it
Lightning node: 02e74c09ca720c891221164424651f62176a4737a4b2fd4f75a5befee127e90b9e

Public Key

npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

NIP-05 Address

_@davidcoen.it

NIP-57 Address

donate@btcpay.davidcoen.it

Profile Code

nprofile1qqs2jas4dhsrs3skjg0r907gx9xvv37n8pp67eya9kgl42ajg59cprg6g5wvq

Author Public Key

npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

Show more details

Last Notes

2024-11-08 21:14:59

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Is it atomic and trustless?
Do you have a demo I can try?

2024-09-26 21:34:00

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What ar(k) you talking about? 😄

2024-09-18 13:06:11

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Yes, you should not run a big routing node on that.
To be honest, I use my Raspberry as a Bitcoin onchain node and electrum server.

2024-09-14 08:44:45

Trying to orange pill a Chinese merchant who accepted bitcoin in the past but using Binance and now he's cut out. https://m.primal.net/KpXh.png

2024-09-07 10:18:29

@npub1tm9…xn72 do you guys have a React Native version of the app?

2024-09-03 09:51:30

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Is it the Primal wallet? https://image.nostr.build/78b420d4d26efafa922f3851c095512002826cef6535d6ce75aea16b0241e97c.jpg
I didn't activate it as it asks too much.

2024-09-03 09:13:37

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What's a Ditto micro app?

2024-08-31 10:23:26

GM!
Nostr is not a scalable alternative to X and other centralized social media platforms, but can be useful as a censorship resistant tool, even for emergency situations.
X could easily create a relay to re-broadcast tweets to Nostr (tweets from users with a npub linked to their profile) and good luck govs that wants to ban https.

2024-08-28 10:18:50

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Not sarcasm. But I don't have a report, just empirical observation. Also, some clients or website pages are gone as far as I see:
Yo, Sup
Nostrum
...

2024-08-28 09:00:39

Every 4-5 months I go back to Nostr from X to check how things are going, what's the status of the UX / clients and how many relays died.
I deserve some zaps for this hard job.

2024-08-28 08:58:28

Your suggestion.
What's the best Nostr client for:
1. Desktop - general use / X style
2. Android - general use / X style
3. Android messaging app / Telegram - Signal style

2024-08-28 07:49:28

How to add an app to the ZapStore?

2024-01-08 21:26:29

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Thanks!

2024-01-08 09:36:38

Can anyone zap me a few sat (even 1 is ok)?
I changed the lightning address and I want to be sure it works with zaps.

2023-10-31 10:11:20

I've just tipped this post with Lightning, which is a scam.
https://iris.to/note1j4kcxrfnyyqk9f22gcvvxvtyyas9zny8lvgtwpxcexx8l7lusneqrrgqay

2023-10-31 10:10:22

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I tip this reply with Lightning, which is a scam.

2023-05-25 13:25:13

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I was panicking today because I was out and unable to connect to the phone’s Wi-Fi.
Then I thought: “oh, timeshift.”
Once home I restored a previous state and it’s working now.

2023-05-25 13:09:44

Timeshift on Linux is a kind of magic.

2023-05-11 13:30:47

#Bitcoin protocol is currently unusable because of a spam attack (spamtokens on Bitcoin).
We did nothing to prevent this and we can't fix it now. We can only deal with it.
We'll remember this as "that time we had the good money but we weren't ready for Lightning."

2023-05-10 21:11:41

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Ho chiesto a chatgpt
https://nostr.build/i/57fd895df3b4b57bb6038d5630f71f42c39369dfc66f8555181350800ebfcf21.jpg

2023-05-10 21:11:40

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Ho chiesto a chatgpt
https://nostr.build/i/57fd895df3b4b57bb6038d5630f71f42c39369dfc66f8555181350800ebfcf21.jpg

2023-05-10 12:20:30

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Non che io sappia

2023-05-08 08:27:08

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That’s me waiting for my 1 sat/vbyte to be confirmed.

2023-05-08 08:25:28

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Indeed.

2023-05-08 07:55:28

Well, i suppose now we know the Fee Market on Bitcoin has a chance to exist, after all.
https://nostr.build/i/59e2ae59c8d291584027468ccf0ba32421df171b726872f98f7385b80f6bc21a.jpg
https://nostr.build/i/363b17528f27ab6eb02782151c81fff8d02bd5c2686f1fadfd4e0de6a75d782f.jpg

2023-05-06 16:12:07

Does anyone know how to group the applications into folders in the dock with Ubuntu 23.04?
I tried "Pin App Folders to Dash" but it doesn't work 😕.
https://iris.to/note16qhp5mc63jg9djtj9hgj6964xu2f982y9nytxcdautda7hrjlqtqnes7r2

2023-05-01 10:04:28

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This?
https://nostredirect.davidcoen.it

2023-04-29 13:11:09

No, not yet.
https://void.cat/d/4rU5mRPNCars68eBJvbL3Q.webp

2023-04-20 20:39:07

They: "You should never update at day 1."
Me: "Yes."
https://nostr.build/av/nostr.build_a68d105444ac5cbe35d83d10804eec1de866ec7d02ed9cad13ac15a5b91a1a0c.mp4

2023-04-07 09:49:57

#Bitcoin

2023-04-04 07:39:06

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Grazie!!

2023-04-03 17:19:56

To the Moon.
Literally.
https://www.space.com/bitcoin-treasure-hunt-moon-lunar-rover

2023-03-31 13:31:19

Everyday I have calls with users from different countries.
I have a curiosity:
why some German users say "Ciao" (Italian for "Hi" or "By") and Romanian/Moldovan users say "Merci!" (French for "Thank you")?

2023-03-30 08:03:19

Today it's my birthday.
35 trips around the Sun.
I appreciate if you want to zap me a beer!
https://void.cat/d/GLMjgX68vrmNB9bc3kWKoQ.webp

2023-03-24 22:45:11

BSV fanboys, trying to rise from the ashes: "Bitcoin nodes are purging TXs will less than 5 sat/vbyte!1!"
Me: "Hold my beer, and my 1 sat/vbyte TX."
https://nostr.build/av/nostr.build_c3e4baa716b9fe9ba3f5397af14b4f5e3930c474aca570a9196d33c350a378af.mp4

2023-03-24 13:40:11

https://void.cat/d/TBsA9saVnccsKL7A9M1P8f.webp
#Bitcoin' skull is cool as fuck!

2023-03-24 11:04:22

Now, this is not a tragedy, but it's objectively a problem, when all major Bitcoin wallets are not ready for Lightning.
And I mean real non-custodial Lightning with an optimized UX.
Too much, too soon.
https://nostr.build/i/nostr.build_dac8cebedcc1a540af5e6a58c777f2bdda9a8275694e0e715ac56ff00d1670f5.png

2023-03-24 10:20:51

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In addition:
Edit means I can make a user also an admin. Nothing more.
Disable means I can temporary disable/enable its role.
Remove means I can remove the user from the server.

2023-03-24 10:18:18

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I can remove you for my server. Yes. Well it’s my own server.
Still, I have no control over your instance.

2023-03-23 14:30:32

More than 200 users have an account on my BTCpay server!
It's free and I have no control over your instance.
Signup here: https://btcpay.davidcoen.it/
https://nostr.build/i/nostr.build_02b26fc2b851e0ab4bfb8112187931b197ac4051591fc1295e83ace4100e7629.png

2023-03-18 20:21:13

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I'm gonna 🤮

2023-03-18 20:01:37

CBDC are your one way ticket to digital slavery.

2023-03-18 12:17:36

I increased my Mempool size to 1 GB.
Probably it's useless, but if you want to send 1 sat/vbyte transaction I don't see why you shouldn't be able to do it.
https://nostr.build/i/nostr.build_bae30bdf49ed0d59d0f900f68ca719cc3a8ee974b60faddb65cc1378f5495244.png

2023-03-14 18:04:02

She already wants bitcoin! Ahahahah
https://void.cat/d/7QQKr6TdSiJ4UWLwvG4xDg.webp

2023-03-13 17:39:38

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Thank you!

2023-03-11 12:38:16

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I need to check better the cors

2023-03-11 11:49:22

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I think it might actually be an issue with my json.
A space between the name and the key.
Which is funny, because I created this tool after I manually wrote the json, which is actually giving the correct json! ahahahah
https://resources.davidcoen.it/nip05creator/

2023-03-11 11:43:45

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Can you show me your nostr.json in .well-known?
I want to understand if it's a problem with mine.

2023-03-11 10:12:46

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Right now, yes.

2023-03-11 10:12:18

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Not sure. I mean, I'm pretty sure SVB doesn't fall alone and probably there is still time to withdraw from "affiliated" banks.

2023-03-11 10:09:43

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Usually.
What if other banks are involved in a bank run?
What SVB did, I bet is not a rare thing.

2023-03-11 08:46:30

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From SVB? No.

2023-03-11 08:36:24

It's interesting.
Startups are in a situation in which they need to decide if they want to sell the USD they still have in their bank accounts (if able to withdraw) for #Bitcoin and expose themselves to volatility (with risk of losing a %), or remain with their USD and risk of losing everything.

2023-03-08 17:20:53

Listen side B of The Seventh One by Toto.
Thank me later.
https://nostr.build/i/nostr.build_16c84a3ab8c72c1464039a913541f47afda62795dfc8ab9b5897b9138b9a7754.jpg

2023-03-08 13:16:10

Hey #[0] I opened a PR last week to add a NIP-05 creation tool to your website.
Can you take a look when you have a chance?
https://github.com/damus-io/website/pull/10

2023-03-07 20:27:22

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Good question

2023-03-07 20:24:47

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Thanks!

2023-03-07 20:15:19

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Not sure why i can't see the video on Iris or Snort Ahahha

2023-03-07 20:04:02

"Shoot the thrill" on my Technics SL-1401 + AT440MLa, through my Yamaha CA-610.
https://void.cat/d/4uVwCahYpJozF1z9X6JWAS.mp4

2023-03-06 08:21:03

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They are not (yet) automatic payments, only recurring.

2023-03-06 08:20:31

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I use Lunanode, but I think also Namecheap offers VPS and support Bitcoin.
I also use Voltage for 1 of my LNURL servers.

2023-03-05 22:14:48

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Mainly VPSs.

2023-03-05 21:57:53

I use #LightningNetwork for my recurring payments.
Instant and zero fees.
Pure p2p, no routing nodes.
It works great.
I don't understand all this noise around it.
https://nostr.build/i/nostr.build_803fdd1bc437906a123ab2ad09f8a92c759189fd1f329fb58b25029ea214726d.jpg

2023-03-05 19:40:32

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I'm looking for a hi-fi streaming service but they are all too expensive for my wallet.
I don't want a divorce! Ahahahah

2023-03-05 15:21:00

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What should do a poor man like me to have some free months on Tidal?

2023-03-04 13:29:30

A curiosity about Bitcoin you might not know.
If you are at the last block of the current Epoch and look behind, the subsidy per block equals the percentage of the total supply mined during that Epoch and the percentage of total supply that still need to be mined.
Example:
we are at Epoch 4, the subsidy is 6.25 BTC per block.
At block 840,000 we'll start a new Epoch with a new halving.
The total bitcoin mined during Epoch 4 will be 6.25% of the total supply, and an additional 6.25% will remain to be mined.

2023-03-03 11:41:16

A curiosity about Ethereum and Bitcoin that not many people know about.
By default, Ethereum does not have a checksum in its addresses.
What does this mean?
Try entering this address into your wallet:
0x5f927395213ee6b95de97bddcb1b2b1c0f16844f
Now enter the address 0x5f927395213ee6b95de97bddbc1b2b1c0f16844f
Your wallet will consider both addresses valid.
However, if you look closely, the second address has two letters switched.
Assuming the first address is yours, if someone sends funds to the second address, they obviously wouldn't reach your wallet.
To address this problem, the Checksum was introduced as an extra solution.
To generate a checksum, the Ethereum address is first converted into a lowercase and uppercase version. Then, the checksum is calculated by hashing the address and comparing it to the lowercase and uppercase version. If the hashed address matches the lowercase or uppercase version, the checksum is considered valid.
Therefore,
0x5f927395213ee6b95de97bddcb1b2b1c0f16844f becomes 0x5F927395213ee6b95dE97bDdCb1b2B1C0F16844F and if you try to invert some letters, the new address will be considered invalid, provided your wallet supports checksum!
In Bitcoin, this does not happen: there is no extra solution applied.
The reason is simple: addresses are already generated with a checksum.
So, if we take a random address 1L7s77cV9hCAGPXo2SNmLmQ3FaPstYJVcT and switch two letters, obtaining 1L7s77cV9hCAGPXo2SNmLmQ3FaPtsYJVcT, if we scan the address, our wallet will show us an error (invalid address).
Satoshi was foresighted!
Nakamoto 1: Buterin 0

2023-03-02 23:21:44

Cool I see the amount of received sats near the Zap icon on Snort Social! #[0]

2023-03-02 22:54:07

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Boom!

2023-03-02 22:52:28

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Yessir!
https://void.cat/d/SAj52zxSiuPbx9wacTCijZ.webp

2023-03-02 22:50:26

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Probably because I'm using the ln address from my BTCpay, which should not have zap yet.
I try to switch to Alby

2023-03-02 22:45:46

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Is there any risks with connecting directly?

2023-03-02 22:43:39

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It show me my BTCpay. Is it because I'm signed in with Alby connected to my BTCpay?

2023-03-02 22:42:35

Am I late to the Zap party?

2023-03-02 22:33:38

#[0] what's this new feature?
https://void.cat/d/Ddz1uXLhByuHxTmUD2Akum.webp

2023-03-02 14:29:29

what's the status of Bolt12?

2023-03-02 14:29:26

what's the status of Bolt12?

2023-03-01 08:06:33

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I already follow you 😊 . Love what you are building!

2023-02-28 21:32:25

Zap ⚡ time with Snort Social + Alby, with total budget and per zap established early.
Each tap (Zap) is a Lightning instant payment!
https://youtu.be/mUqzfmcCH4g

2023-02-28 20:36:18

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Thank you for following me!

2023-02-28 20:13:01

I followed back some bitcoiners I missed.
If I should follow you please let me know why!
https://void.cat/d/EYpQ97nRDdch47gCv8pRup.webp

2023-02-28 17:48:54

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Thanks for your suggestions Patrick!

2023-02-28 17:48:17

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Yes. The reason why I didn’t add this feature is because it overrides your current relay list and you risk to lose all your Follows list. Unfortunately I went through this.

2023-02-28 15:19:16

NIP-05 Creation Tool now integrates the npub to HEX conversion tool provided by #[0] https://resources.davidcoen.it/nip05creator/ !

2023-02-28 07:45:25

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Yes, i had 1.7.9, now i see that

2023-02-27 19:10:51

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I still don't see the plugin. What should I do?

2023-02-24 19:52:52

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It is

2023-02-24 11:46:28

Timechain Calendar is great, so... Why shouldn't I have it as a live wallpaper for my office? 😃
https://nostr.build/i/nostr.build_2b420561d0fbf78b7bb1198ba35c82cc87438a4c5bd220ccde4f44b277174ed5.jpg

2023-02-21 09:18:15

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Yes, you are right.

2023-02-20 17:39:57

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mempool.space is just another node, so estimates are not more accurate then yours, if you run a node and do not apply filters.
Mine were already probably off, since I don't drop transactions: when mempool.space shows a network congestion and transactions < n sat/vbyte are dropped by their mempool, my node keeps and relays them.

2023-02-20 17:33:36

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I thought about this.
Probably.
But I don't care because I use always 1 sat/vbyte for onchain transactions.
What is more interesting is to know if forced closure of LN channels will have the correct estimates or if this is not an issue at all because they are not affected.
By the way, I'm also wondering if Ordinals/Inscriptions are affecting them.

2023-02-20 14:01:25

Running #ordisrespector patch on my #Bitcoin node.
Probably will be useless, but my node, my rules.
https://nostr.build/i/nostr.build_884da37d205ce9f9bbda7a65c2b004d6f423e5dec120af463793ef28d9286163.png

2023-02-20 13:00:49

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Thanks Roman!

2023-02-20 12:01:24

I'm under a tips attack, OMG ahahahahahh!🤣
Please stop!
Or continue, choice is yours! 😂😂😂
https://nostr.build/i/nostr.build_274502e9c5b9eedd89b86e37e0fd920af97b2912b1226bd6af7ab6a3f94fbb5b.jpg

2023-02-20 11:46:38

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Thanks a lot!

2023-02-20 11:44:26

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Thanks!
Was it fast enough to retrieve the invoice in your opinion?

2023-02-20 11:39:39

Just to clarify my previous request of tips:
the test is due to a problem with LN Address from BTCpay and some Nostr clients, unable to get the invoice from LUD16.
The issue was probably on BTCpay side and it should be fixed, but Damus gave no issues even before, so please don't try from Damus.
Astral and Snort had difficulties with the LN Address.
If you can try to send me 1 sat (no more) using Astral or Snort and tell me here in the comments if it works or give you some errors, I appreciate!

2023-02-20 11:37:48

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yes I'm aware 😉
The test is due to a problem with LN Address from BTCpay and some Nostr clients, unable to get the invoice from LUD16.
The issue was probably on BTCpay side and it should be fixed, but Damus gave no issues even before. Astral and Snort had difficulties with the LN Address.
If you can try to send me 1 sat (no more) using Astral or Snort and tell me here if it works or give you some errors, I appreciate!

2023-02-20 11:27:12

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From which Nostr client?

2023-02-20 11:22:09

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Did you tip using Snort? Or Astral?