calle 👁️⚡👁️

proof of concept for @npub1m2m…r8p9 – chaumian ecash conference tickets? @npub1par…amkj
required only minimal changes in the mint and the wallet. the mint sells tickets for a fixed BTC price via Lightning. users can trade tickets aftermarket without double-spend risk – buying a ticket that has been sold multiple times, a very common issue for conferences, concerts, etc. should we explore this further?
https://image.nostr.build/899fcab031848113930d17f60ac693e5a77fcac4225cf24c26a82a2919906f93.png

2024-11-03 10:08:29

Bitcoin has benefited immensely from Tor.
Give back. Run a relay.

2024-11-03 08:36:35

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which client is this? Looks sleek af

2024-11-01 09:32:15

Who here runs a Tor relay?

2024-10-31 13:25:54

Continuity replacement for macOS (Soduto) + Android (KDE Connect)
https://soduto.com/
+
https://kdeconnect.kde.org/

2024-10-31 12:41:56

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"You spend too much time in bitcoin circles." – if that's true, I'm fucked

2024-10-31 09:37:54

Don't get psyoped into believing that running a Lightning node is hard. It's not.
Most people just wants to sell you something.

2024-10-31 09:27:19

Getting consistently more engagement here than on X for weeks now.

2024-10-30 21:21:53

https://www.prlondonlive.com/listings
https://image.nostr.build/75af59897c3ad66a42fcc6ed6a5497c7bc2ff9d64cf67be147e03923ad021048.jpg

2024-10-29 23:30:00

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cashu.space > docs.cashu.space > Resources 🫡

2024-10-29 16:11:34

super nice, I wasn't aware, this is a great use case!

2024-10-29 09:02:14

GM, it's not the best book but it's honest work. What matters though is consistency.
The hardest part about philosophy is to remember in daily life what you once understood during a meditation. On the spot, within a second or two, when life challenges you, to be able to recognize your emotions and to remember what you've once read and decided how you would act. The hard part is not understanding, it's acting on it when you actually need to. Even a child can understand it because what's good is often simple, even trivial.
The only way to get there is through repetition. Do philosophy every day and your moral instincts will grow like a muscle.
https://image.nostr.build/9b0b3d7cef2f742172bffe11733b20923adf3b6d347c54f1f2f47f883ebf0395.jpg

2024-10-27 01:33:59

cashu.me now supports restoring ecash from a seed phrase
https://video.nostr.build/1e4c3ad0d0f87179050087cd9d996424dc2241d6f49d47c5addaeb643a3f0660.mp4

2024-10-25 12:08:19

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Those 1 sat tx can become inefficient over time, mints are expected to incurr fees at some point (a minimum fee of 1 sat is realistic). There are msat keysets where this becomes cheaper though.

2024-10-25 12:05:56

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Test harder!

2024-10-25 12:02:58

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Only one of the parties usually has to contact the server at time of transaction.

2024-10-25 12:01:40

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Are there portable hotspots that support random IMEI and eSIM?

2024-10-25 09:37:08

"Years ago i had a conversation with Daniel about implementing the possibility to change the IMEI of the device. He is of course aware about the privacy impact a non changeable identifier as the IMEI has. But there is nothing we could do about this. Neither the hardware provides the possibility to do that nor the law allows it. With the exception Africa. This is the only continent where it is explicitly allowed."
They say you're not allowed to change a number stored in a device that you own 🤣
https://discuss.grapheneos.org/d/5126-imei-and-geolocation-tracking/6

2024-10-23 22:04:49

NIP-17 for NDK (timestamps off-spec)
Time to drop NIP-04 for good, anon.
#nevent1q…2a8a

2024-10-23 22:03:04

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Here's my contribution to the bounty. Note that the created_at timestamp (and thus also the filter for receiving) are off-spec and need to be random(2daysAgo, now) and 2daysAgo instead.
https://gist.github.com/callebtc/0ed77c137809c7fc7627fe8fd4e9f163

2024-10-23 20:46:50

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Same, only annoying thing is that I sometimes see my personal obsessive haters in apps where I haven't muted them yet. Otherwise, talk to the void fuckers. I don't even think about you.

2024-10-21 18:37:35

GM fellow paranoid crypto anarchists.

2024-10-21 06:55:36

Testing ecash payments with bearer tokens stored on a physical card. You can see the card being topped up with one phone and pay the other. It feels incredibly fast and smooth.
Tap to pay UX with ecash is as good as it gets for payments. You're literally handing over the money.
https://video.nostr.build/41b9c7bb2306a6b21249a80f1e4d986b4c5663df3f9c60e8fc84ba33abf2ca46.mp4

2024-10-19 10:56:28

NIP-17 maxis call to action. Death to NIP-04!
#nevent1q…3rdt

2024-10-19 10:29:16

I've noticed that people who regularly pump out code have a more cheerful and positive attitude.

2024-10-19 10:25:25

MERGED: NUT-18 Cashu Payment Requests
This NUT introduces a standard format for payment requests that supply a sending wallet with the information necessary to make an ecash payment to the receiver (e.g. a point of sale).
Here, the payment is transmitted via Nostr.
https://github.com/cashubtc/nuts/blob/main/18.md
https://video.nostr.build/29fd7b89b0118fe392f6c0d04c65a7c1871180d8163272712acac59781db0034.mp4

2024-10-16 17:34:15

"I support a shitcoin scammer because the other clown is a communist"
– Bitcoin "anarchists" in 2024

2024-10-16 07:57:11

My condolences to the single-issue Bitcoiners who supported a presidential candidate who's now officially a fully-retarded shitcoin scammer.

2024-10-14 10:44:18

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That wasn't Tor's purpose nor is it in its control. Tor has other more serious issues.

2024-10-13 18:00:01

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You're offline

2024-10-13 17:36:03

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It accepts ecash from any mint, gotcha

2024-10-13 17:23:40

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there is a difference between understanding and using something

2024-10-13 16:01:27

This happened during a demo of Tollgate, a tool for OpenWRT routers which let's users pay for WiFi with sats-denominated ecash. Friend of mine connects his phone to the wifi hotspot and is shown a captive portal that says it wants ecash from a certain mint. Friend doesn't have ecash. But I do.
I whip out my phone and create a 100 sat token, show it to him as a QR code, which he copies and pastes into the captive portal. A few seconds later, he's online. 1 sat = 1 minute internet.
We're just scratching the surface of what's possible.

2024-10-13 11:19:31

bolt12 fixed by @npub16an…6pfx @npub1yxp…399s
https://alexlwn123.github.io/Lightning-Welder/

2024-10-13 09:39:02

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Web portal with "paste ecash here" with a backend wallet that you control. Backend wallet can be in CDK/Cashu-ts/Python.

2024-10-12 17:49:28

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Agree, @nprofile…xx9q's talk was outstanding

2024-10-12 17:40:52

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Everytime I take a shower?!

2024-10-12 17:07:10

Make Bitcoin conferences weird again https://files.sovbit.host/media/50d94fc2d8580c682b071a542f8b1e31a200b0508bab95a33bef0855df281d63/a26055ce321865430656a8aaf847d6bc77a36d74d6822ad27e834d24242c25ca.webp

2024-10-12 17:05:12

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lol

2024-10-12 12:47:42

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This is 99% my fault, I've discovered a few bugs in the last few days. Will fix it and explain when it's done!

2024-10-12 06:54:21

The internet is fucked.
#nevent1q…yaqf

2024-10-12 06:54:05

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Which app?

2024-10-11 23:06:53

Super interesting wallet.
Micro payments go into a Cashu mint, medium payments go into Liquid, Large payments go into a Lightning channel.
#nevent1q…ads5

2024-10-11 07:14:15

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People that tell you you HAVE TO listen to the users and if you don't you're a bad programmer.
Every good programmer knows that you don't listen to the users. Never.

2024-10-10 21:55:28

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Donate some ecash and it will be added to the list 🫡

2024-10-10 11:42:15

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Yes

2024-10-10 08:25:13

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https://api.audit.8333.space/docs
🫡

2024-10-10 07:24:54

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I wanna say @npub1h2q…w8ch mint is amazing but it seems like they don't like Tor so their mint isn't reachable by this tool. Maybe something they'd reconsider?

2024-10-10 06:52:44

I've built a thing: The Cashu mint Round Robin auditor
An app that perpetually monitors a list of mints by randomly sending Lightning payments between them. Forever. The sats go in a circle until all is lost to fees or rugs. If a mint fails to pay an invoice, it is marked with a scary red label.
You can donate Ecash from any mint to add it to the list of audited mints!
https://audit.8333.space
https://image.nostr.build/1681a4dce2de71daa02c14046412f05ecdabff3fbe4df2f46aa389a3424fb975.jpg

2024-10-10 05:52:16

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lol

2024-10-09 10:24:29

I still can't believe we're having an ecash btc++ conference in two days.
Just a year ago we were merely a handful of nutcases. Now we have a whole ecosystem to build on. Incredible.

2024-10-09 09:59:46

I've been thinking too much about NFC payments lately. It would be insane if we could achive card-to-terminal payments one day but I think challenges with storage and coin selection make the naive approach (store nuts on card, terminal takes them out) infeasible in the short term. However, we can still achieve a lot with phones.
The naive approach with phones would be to send the nuts directly via NFC form device to device. This is possible in Android through Host Card Emulation (HCE) where one phone can pretend to be an NFC card with data on it (the nuts) and the other phone simply scans it. Unfortunately, Apple will never allow us to use their (your!!) hardware for HCE so we shouldn't depend on it.
There is an alternative approach though, which use payment requests. Payment requests are a work-in-progress Cashu NUT protocol update. They are generated by a receiver to tell the sender how to send them nuts. They include information transport methods (how to reach the receiver), optional amount and receiver pubkey. For example, a payment request can say "send 100 sats to this HTTP endpoint, or DM this pubkey on nostr". It can also include instructions to lock the tokens to a pubkey. A payment request can be shared as a QR code, which can be scanned by another cashu wallet that then makes the payment (similar UX like Lightning invoices).
We can use payment requests in combination with NFC to make a very good payment UX that works with Android, iPhones, and on the web (webnfc). If we put a payment request onto an NFC card, that card can be scanned by a sender's phone. The sender's phone could then do the coinselection and send the nuts via nostr to the receiver, for example. This would basically be almost instant. A web wallet like cashu.me could even generate payment requests and store them on an NFC card (from the browser) which another cashu.me wallet could scan (also from the browser) to make a payment. A little bit like a cursed PoS system.
Should be further explored!

2024-10-09 09:20:20

🔥
#nevent1q…t7dn

2024-10-09 09:16:13

Fantastic writeup of the case by the law firm Bird & Bird who represented COPA in the trial against Craig Wright
https://www.twobirds.com/en/insights/2024/global/a-different-way-to-defraud-the-lessons-from-the-trial-of-bitcoins-origins

2024-10-09 07:16:29

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Awesome feedback! @nprofile…le0h is the amazing dev behind npub.cash

2024-10-09 07:11:18

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Before you eat it, hit me up!

2024-10-08 18:23:06

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I don't do DMs here, please use Matrix or even Telegram for DMs sir

2024-10-08 17:58:16

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*protocol (nobody owns you here)

2024-10-08 16:30:28

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love your blog, read many of your articles 🙏

2024-10-08 15:43:00

📢 sovereign.app and Chamberlain mint release with a nice blog post by @nprofile…6090.
Let's see some Nostr clans!
#nevent1q…44un

2024-10-07 16:37:35

I like this slide https://image.nostr.build/66e6df67a9a9975939217c0f0b8a79bb9fecbd83e6bc6f6bfa633461c371dfbd.png

2024-10-06 16:28:17

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justdoit.gif

2024-10-06 16:25:33

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🫡

2024-10-06 15:16:54

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https://cashubtc.github.io/nuts/00/

2024-10-06 14:05:16

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github.com/cashubtc/nutshell 🤙

2024-10-06 10:59:44

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outbox model, I connect to your relay to get your posts.

2024-10-06 10:30:01

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🧡

2024-10-06 09:45:59

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cashu.me only does NWC for Lightning so far. NWC for Cashu will blow people's minds because it's going to be too fast and smooth

2024-10-06 09:36:39

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Oh no, I'm getting too bullish again

2024-10-06 09:31:37

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When we have working payment requests, we can use that in NWC, we don't need to reinvent much

2024-10-06 09:30:19

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An nwc extension is trivial, let's get the harder things done first :)

2024-10-06 09:18:18

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Which app is this? Nice design

2024-10-06 08:47:36

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It's still embryonic

2024-10-06 08:46:56

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Yes

2024-10-06 08:13:41

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Not really hard. You define one clock as the truth and that's it, we've been doing it for a long time and it works great.

2024-10-06 07:52:28

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Plausible

2024-10-06 07:48:35

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Time keeping without centralization is a paradox

2024-10-06 07:46:52

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It's could be as straightforward as "paste token here" in the beginning. Eventually (I hope soon), we will have NWC for ecash operations and ecash payment requests so that it's more convenient to pay ( @nprofile…le0h is the man here).

2024-10-06 07:44:03

Hard to admit for some people but Unix time is likely going to have a more significant historical impact than the Gregorian calendar

2024-10-06 07:32:42

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Nice work

2024-10-06 07:30:23

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I should check out Nostur!

2024-10-06 07:30:02

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Weird bug

2024-10-06 07:29:24

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Cool stuff. Is this a cashuB token? (Or cashuA?)

2024-10-06 07:28:50

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Let us pay in ecash. Paywall receives ecash, burns it and receives on LN. Just two simple API calls (see NUT-05) or you use cashu-ts and it's almost trivial :)

2024-10-05 19:28:43

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sweet

2024-10-05 10:27:53

supplementing selenium with 2 brazil nuts a day

2024-10-05 10:24:20

bolt12 offers 🔥
#nevent1q…jhzc

2024-10-05 10:21:21

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That's very interesting, it would indeed be very useful for mints not having to reveal their UTXOs for a proof of reserves. Thanks for noting that.
I haven't been able to look at your protocol yet so I have a rather basic bunch of questions that come to mind:
- The ~55 Mb keyset file you load seems to have information up to a certain block height. Is this file generic for the entire chain or custom to the prover?
- The processing of the file takes quite some time and you mention this can be done once and proofs can be checked faster after that. Does the client need to do the processing or could someone else do it for them?
- Does it require processing custom to the prover or can it be used to prove anyone's claim?
- Is there a window for cheating when the file is for a lower block height than the current one? Since I don't know the UTXOs, is there a way to make sure the coins haven't been moved since the proof was made?
- The range was from 100k to a power of two, you say it's just the way you set it up. Can the range be arbitrarily precise?

2024-10-05 10:04:18

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outputs have already been signed!

2024-10-05 09:53:47

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There are a few apps that use it already, it's pretty simple in design: put the NUT in an X-Cashu header, make the middleware read and receive it, and let the request through. I'm not aware of a comprehensive middleware that you can just plug and play but there are many libraries available depending on what you're building.
check this out: https://proxnut.com/

2024-10-04 22:10:16

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I should give it another try, especially the desktop client looks great