thedavidcoen
David Coen

Author of Q/A about Bitcoin, SW QA Tester and Support for EdgeWallet.
Tips:⚡️ [email protected]
Useful links: https://links.davidcoen.it
Lightning node: 02e74c09ca720c891221164424651f62176a4737a4b2fd4f75a5befee127e90b9e

Public Key

npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

NIP-05 Address

davidcoen.it

Profile Code

nprofile1qqs2jas4dhsrs3skjg0r907gx9xvv37n8pp67eya9kgl42ajg59cprgpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsusrchq

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub149mp2m0q8prpdys7x2lusv2vceraxwzr4ajf6tv3l24my3gtszxsncas0t

Show more details

Last Notes

2025-07-15 07:41:56 GMT

- reply

You don't need a blockchain if you "move" bitcoin between ETFs using Coinbase.

2025-05-19 14:26:47 GMT

It's not so much, but it's something.
https://btcpay.davidcoen.it/txcounter/html
If you like, you can make a donation to help maintain the server: [email protected]
or here https://btcpay.davidcoen.it/apps/2g9NXCoPgF5zRvNkVx3iavPaneBc/crowdfund https://blossom.primal.net/65af6c8b1be82f239067bbe11f7768aaa7930ad5cabdfbe28dcc1e2331eed61b.png

2025-04-11 09:10:09 GMT

- reply

You should NEVER, EVER, send "on ramp" bitcoin to a custodial service.
"Yes, but for small amounts the setup is a mess!".
Soon it will become as easy as sending to a Bitcoin address.

2025-04-06 16:17:15 GMT

- reply

Totally!

2025-04-06 15:01:41 GMT

- reply

I don't think it's a matter of "believing in Lightning".
Paul is a bit skeptical about reliability and has self-custody as a priority, that's why we strongly opposed previous lightning solutions that were custodial.
I respect his point of view.
Edge remains open source, so PRs are very welcome.
Also, you don't need to use shitcoins it you use Edge! Imagine your edge account as a client-side encrypted package where you can collect seed phrases (aka wallets) and maybe in the future ever more things.
You can have Bitcoin-only accounts with as many Bitcoin wallets as you wish.
That's how I use my accounts.

2025-04-06 11:16:52 GMT

- reply

Also @nprofile…thfh the reply was for @nprofile…k9pr's comment, not for the main post by Daniel.
Ps: I saw the recorded event with Bitpolito. You were great. Too bad I wasn't aware of that, I live a few km from there, it would have been an occasion to meet in person :-( !

2025-04-06 11:13:02 GMT

- reply

Hey Daniel, I'll do!
We currently don't support lightning, that's true.
I'm a Lightning early adopter so you can clearly understand how much I want to use Edge to make LN payments.
Unfortunately we are not still ready for that, for a few reasons:
Onboarding would be difficult for the majority of our user base
Hard for them to manage liquidity (the current SDK options do not support splicing yet, as far as I know)
Success rate of payments (it's actually improved a lot lately, so that might not be a big issue anymore!)
In the meantime, I use Breez and Phoenix wallet.
As for Ark, it's no longer theoretical. There are a couple of implementations currently in development, check ArkLabs and Second.
They are in testnet, and probably out in mainnet later this year.

2025-04-06 11:02:45 GMT

- reply

Yes, that's why I think we should work on sharing liquidity management.

2025-04-05 07:07:57 GMT

- reply

The problem is being a liquidity provider.
Not just for the infrastructure and the rebalance, but because as a centralized identity, you are an easy target for the state.
If they decide you are a money transmitter, then good luck.
That's why we need distributed liquidity and possibly separate the service operator from the liquidity providers.
For onboarding, the issue is definitely channel creation.
We may be able to solve this with Ark.

2025-03-28 14:17:45 GMT

As a non-engineer, I had hard time getting an Overseerr service reachable remotely.
I asked chatGPT and I had the solution in 5 minutes! 😱
So, I used it again to create this tool: https://resources.davidcoen.it/ddnscpanel/
This tool helps users with a dynamic IP and a hosting provider with cPanel configure Dynamic DNS (DDNS) automatically.
If you have a domestic server but your ISP changes your public IP frequently, you need a way to update your domain to always point to your current IP.
Who is this for?
- Users who have a dynamic public IP
- Users whose domain is managed via cPanel (with a URL to update the IP).
Users who want to access their home services (like Jellyfin, Overseerr, BTCpay, etc.) remotely.

2024-12-23 21:23:51 GMT

- reply

Economic node validators affect the consensus, not the miners.
At least on Bitcoin.

2024-12-22 10:23:38 GMT

- reply

The original topic didn't directly mention monero, even if monero can't be a real alternative to fiat.

2024-12-21 10:27:42 GMT

- reply

No, of course.
But I would bet if you compare the probability of changing Bitcoin monetary policies vs Monero’s or any other crypto you choose ;-)

2024-12-20 19:07:48 GMT

- reply

Thanks. So an inflation bug on coinbase tx can be seen as in Bitcoin, that's good.

2024-12-20 18:23:41 GMT

- reply

No hard fork needed to add that terrible block weight parameter.

2024-12-20 18:22:46 GMT

- reply

Sorry but it’s not “predictable”.
Also, with Bitcoin you can see an inflation bug seconds after the transaction is sent, you can’t in Monero.
In addition to that, even if the inflation bug is in a coinbase transaction (probably impossible, but who knows) with Bitcoin a miner needs to wait around 16 hours before being able to spend the funds, with Monero just 2.
With Monero an inflation bug can be buried under days of blocks or more.

2024-12-20 18:15:17 GMT

- reply

Can you show me a coinbase transaction where I can see those 0.6 XMR?

2024-12-19 12:39:40 GMT

- reply

I tried a couple of times, but it was never appreciated. I ended up doing presents, paid in BTC.
I guess they will regret in the future.

2024-12-19 12:24:01 GMT

- reply

I believe we have fiat characteristics or Bitcoin. That’s not necessary bad, if you need crypto in order to make more usd or bitcoin, or if you need tools you find in the fiat world but are way more advanced in the crypto world (lending, staking, mixing…).
But Bitcoin is something else.
The Bitcoin capped supply and the distributed consensus that makes changes so hard to be implemented are the key features that differentiate Bitcoin from crypto.
As per Monero, I think it’s cool and might be useful for getting privacy on low amounts if you use it as a tool and go back to Bitcoin as soon as possible. I would not hold funds there as an alternative to Bitcoin.
I don’t speak for Edge, I speak for myself.

2024-12-19 12:11:03 GMT

- reply

Monero issuance is not predictable.
PoW can be changed to PoS or anything else if the validators want and it has already been changed in the past. It’s easier to change the consensus layer on these crypto because they can be “decentralized” but their consensus is not really distributed.

2024-12-18 22:00:34 GMT

- reply

Embrace fiat with onchain "privacy" features.

2024-12-02 18:33:28 GMT

- reply

I managed to add some indexers.
The whole configuration takes time but it's pretty cool!

2024-12-02 16:36:36 GMT

- reply

How do you pass CloudFlare protection when adding indexers to Prowlarr?
I tried to add Tor in settings, Indexers with tag tor, but when I go to > Indexers and try with one (say 1337), I cannot pass CloudFlare.

2024-12-02 08:10:29 GMT

- reply

I'll read it later today. Does this work also with Ubuntu/Debian?

2024-12-01 21:23:16 GMT

- reply

Any good tutorial?

2024-12-01 18:26:27 GMT

- reply

Yeah, I give her a couple of years.
#nevent1q…dzwg

2024-12-01 18:23:21 GMT

I asked Chatgpt to create something to print, but it still sucks.
Any free image generators I can try? https://image.nostr.build/f4d984ef6420297f00c94b2229fb62996af8b0b4ef21a01a767728036a90c439.jpg

2024-11-25 19:57:23 GMT

My #BTCpay server has always been free and will continue to be free.
However, there is a cost to keep it alive and it's becoming not negligible over time, considering the amount of users, the files they upload and the increasing size of the Bitcoin blockchain.
If you want to contribute, I'd really appreciate.
Any amount is important!
If you prefer Bolt12, you can donate at [email protected] or zap some sats here.
Thanks!
https://btcpay.davidcoen.it/apps/2g9NXCoPgF5zRvNkVx3iavPaneBc/crowdfund

2024-11-08 22:53:35 GMT

- reply

Can you ping me? Also can you share the git repo if available?

2024-11-08 21:14:59 GMT

- reply

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

2024-10-31 20:12:22 GMT

- reply

Yes, I still need to figure out how to make this useful.

2024-10-27 18:22:26 GMT

I'm not sure how this #pubky thing works.
https://app.pkarr.org/?pk=p3c4ynqzrwgnpf18putmxy1duutnps3q46knmgbtu3wbojqqx7zo
https://image.nostr.build/318efcf05f890da39803de7f7d0ff50574e317480b543e7c9a3947f2b1b1b042.jpg

2024-10-25 19:03:12 GMT

- reply

Nice! Tipped

2024-10-08 12:29:11 GMT

I think I did it!
I have an email-alike address which is
a Lightning Address (LNURL -> Bolt11) &
a BIP353 address (Bolt 12 aka LN Offers + silent payment onchain fallback).
Please try [email protected] with ANY Bitcoin app you want that supports one of the method above!

2024-10-06 17:34:12 GMT

Can anyone send me some sats at [email protected]?
I'm trying BIP353 on a new domain.

2024-10-06 17:32:38 GMT

Can anyone send me some sats at [email protected]?
I'm trying BIP353 on a new domain.

2024-09-27 12:55:04 GMT

Anyone on @npub1uq7…u0c2?
I want to try the chat and send some sats.

2024-09-26 21:34:00 GMT

- reply

What ar(k) you talking about? 😄

2024-09-24 20:04:55 GMT

- reply

That's cool!
#nevent1q…s4t6

2024-09-23 10:54:45 GMT

Users of my BTCpay Server https://btcpay.davidcoen.it can now use the B2P Central plugin, an aggregator of Bitcoin peer-to-peer buy and sell offers, retrieved from the main market platforms.
All without exiting their BTCpay dashboard and using their onchain / offchain funds!

2024-09-19 20:48:37 GMT

- reply

Same.
#nevent1q…yg9h

2024-09-18 17:46:47 GMT

- reply

Diffuse antisemitic contents / comments / ideologies are my triggers.
They keep me focused on my number one goal: keep my family safe.

2024-09-18 14:06:43 GMT

Can you point me to some privacy advocates here on Nostr worth following?

2024-09-18 13:06:11 GMT

- reply

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.

2024-09-18 08:29:22 GMT

- reply

My wimpy raspberry pi 4 is up and running for more than 4 years.

2024-09-14 13:18:01 GMT

- reply

You are so true, my mistake!

2024-09-14 13:03:20 GMT

Is there anyone working on a NIP44-compatible Nostr client made in React Native?

2024-09-14 08:44:45 GMT

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

2024-09-12 10:22:26 GMT

- reply

Done!

2024-09-12 09:50:05 GMT

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

2024-09-10 18:28:54 GMT

First ride with my baby on board.
https://m.primal.net/KmKG.jpg
https://m.primal.net/KmKJ.jpg
https://m.primal.net/KmKL.jpg

2024-09-09 11:28:11 GMT

Saying that Bitcoin's scalability & privacy issues can be solved with Liquid / sidechains or even drivechains, is misleading and scammy.
I see no difference in trying to convince the users that they should "wrap" their assets into your shitcoin.

2024-09-07 10:18:54 GMT

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

2024-09-07 10:18:29 GMT

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

2024-09-07 10:18:15 GMT

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

2024-09-07 08:02:21 GMT

Can you guys stop selling #Bitcoin?
I have to pay the rent.

2024-09-06 17:52:09 GMT

Lately it seems more and more movies and TV shows I watch have a character who breaks the Fourth Wall. Am I wrong?
I find it incredibly annoying.
And I'm not talking about movies or shows where the character is known for this, like Deadpool or She Hulk.
I also often see an introduction where the character builds the background narrative, almost as if the average viewer is no longer able to immerse themselves and understand the relational dynamics as they get deeper into the story, but needs to be prepared.
Is it me?
Is it a problem with the writers?
Or is there a study behind it by the streaming services to capture the viewer's attention as quickly as possible?

2024-09-04 16:30:41 GMT

- reply

As far as I like "AI" as a complementary tool, we have the kind of users who really needs human touch.
But we could try some AI-powered auto-reply for sure, maybe in a A-B test.

2024-09-04 07:58:51 GMT

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 GMT

- reply

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 GMT

- reply

What's a Ditto micro app?

2024-09-03 07:40:42 GMT

- reply

how?

2024-09-02 09:12:58 GMT

It's Monday and you have 100+ tickets to reply (users are more active during the weekend).
What do you do?

2024-08-31 10:23:26 GMT

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.

2024-08-29 12:01:38 GMT

- reply

That's correct!

2024-08-29 11:44:06 GMT

- reply

That's not correct.
Paul (and we agreed) refused to add a custodial solution for Lightning, contrary to what other competitors did.
I deep into Lightning since the beginning and one of my role with Edge is research for possible integrations.
Not just Lightning: I already opened a research task for (cl)Ark / Ark in addition to the one we have for LN.

2024-08-29 11:32:02 GMT

Edge Wallet is on Zap.Store!
Thanks @npub10r8…t2p8!
https://m.primal.net/KTWq.jpg

2024-08-29 11:27:20 GMT

- reply

Not yet.

2024-08-28 11:12:21 GMT

- reply

the zap part is sarcasm, of course.
The first part is not. Every x month I come back and check how things are going.

2024-08-28 10:20:49 GMT

- reply

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 10:18:50 GMT

- reply

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 10:15:38 GMT

- reply

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

2024-08-28 09:00:39 GMT

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 GMT

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 GMT

How to add an app to the ZapStore?

2024-01-08 21:26:29 GMT

- reply

Thanks!

2024-01-08 09:36:38 GMT

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 GMT

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

2023-10-31 10:10:22 GMT

- reply

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

2023-05-25 13:25:13 GMT

- reply

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 GMT

Timeshift on Linux is a kind of magic.

2023-05-11 13:30:47 GMT

#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 GMT

- reply

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

2023-05-10 21:11:40 GMT

- reply

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

2023-05-10 12:20:30 GMT

- reply

Non che io sappia

2023-05-08 09:34:10 GMT

Heads up:
I have to temporary stop new user registration on my BTCpay server. It has more of 200 users and lately the database is having a hard time. I'm investigating if that's the problem, or if those shitty inscriptions are, and trying to understand if increasing the resources can help, but this will cost.
If you have an account on my server btcpay.davidcoen.it, would you consider to support me with a "pay what you can" model?
Any suggestions is appreciated!

2023-05-08 08:27:08 GMT

- reply

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

2023-05-08 08:25:28 GMT

- reply

Indeed.

2023-05-08 07:55:28 GMT

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 GMT

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 GMT

- reply

This?
https://nostredirect.davidcoen.it

2023-04-29 13:11:09 GMT

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

2023-04-20 20:39:07 GMT

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

2023-04-07 09:49:57 GMT

#Bitcoin

2023-04-04 07:39:06 GMT

- reply

Grazie!!

2023-04-03 17:19:56 GMT

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

2023-03-31 13:31:19 GMT

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 GMT

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 GMT

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 GMT

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