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

nprofile1qqs2jas4dhsrs3skjg0r907gx9xvv37n8pp67eya9kgl42ajg59cprgpz3mhxue69uhhyetvv9ujuerpd46hxtnfdue7ufwx

Publishing to

relay.damus.io

Author Public Key

npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

Show more details

Last Notes

2024-09-12 09:50:05

I'm trying Nostree.
Thanks @npub1gzu…a5ds!
Would it be possible to add a contact form that basically sends the user's message as an encrypted DM on Nostr?
Also a "Save link tree" button to save as a JSON file would be cool.
https://nostree.me/npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

2024-09-04 07:58:51

I was thinking about the "space and time" analogy a few weeks ago, then @npub1ej4…ndrm comes out with this beautiful article: https://petertodd.org/2024/covenant-dependent-layer-2-review
🤯
I like the suggestion: "do a consensus cleanup soft-fork, followed by CTV."
I would add SIGHASH_ANYPREVOUT.

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 10:20:49

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Yes, APK and source code on Github. Here the latest master: https://github.com/EdgeApp/edge-react-gui/releases/tag/v4.11.0
Here the releases: https://github.com/EdgeApp/edge-react-gui/releases

2024-08-28 10:15:38

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Our app https://play.google.com/store/apps/details?id=co.edgesecure.app&hl=en

2024-08-28 07:49:28

How to add an app to the ZapStore?

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.

2023-03-31 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")?

2023-03-24 13:40:11

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

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

2023-03-11 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 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 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

2023-03-06 08:21:03

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

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?

2023-03-03 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 22:52:28

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

2023-03-02 22:33:38

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

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 15:19:00

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

2023-02-27 19:10:51

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

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

2023-02-20 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 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 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 11:27:12

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From which Nostr client?

2023-02-14 13:37:35

I create a simple, old style, html page in which I start collecting some resources I use on a daily basis for my job.
You can find it here, if you need some tool: https://resources.davidcoen.it
I show you some of them here, for Nostr👇
#Nostr Redirect Tool
This tool is useful for creating a redirect for a domain to a Nostr profile. Nostr URLs are non-standard, so it can be a bit tricky to understand what to do. https://nostredirect.davidcoen.it
Nostr broadcast
A tool by Bordalix
Find your Nostr events via your public key
NIP-05 Creation Tool
The tool generates a .zip file. Inside you have a .htaccess file for your Apache server and a folder which contains a JSON called "nostr.json".
You simply need to paste the unzipped contents in the domain you prefer.
https://resources.davidcoen.it/nip05creator/

2023-02-13 08:56:36

LImagine to have the best monetary protocol ever invented with the strongest public ledger, which has the second scarse asset after bitcoin, and the best usecase you find is to inscribe jpegs and consider them NFT.
"You want censorship?" No.
"I create demand!" Still idiot.

2023-02-11 14:03:05

Anyone wants to zap me? :-)

2023-02-04 19:56:47

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https://void.cat/d/M5GFNtUwnDf93Sx9ikvMjP.webp

2023-02-04 19:56:19

My second paid relay.

2023-01-27 15:48:17

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Got it.
So is it not possible to have a clickable link to a Nostr uri which is shown as a domain?
for example I have https://nostr.davidcoen.it which is a redirect to my Nostr public key on Nostr.Social. I’d like to have a more general link you can open with your default Nostr client.

2023-01-25 14:56:41

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Way better!
I still don't like the grey backround for the original post while replies below have transparent background. I would do the opposite: imo this would prioritize the first post from a user perspective.

2023-01-06 19:51:26

Serious question: who's gonna buy an iphone to try #[0]? 😄😬