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DZC
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dzcoding...
Replying to Avatar calle

Tap-to-pay with CashuBTC ecash — for bitcoin.

Fiat credit cards nailed the UX: fast, offline, works anywhere.

I always wanted that for Bitcoin.

Now it’s open-source. Private. Instant. Beep, done.

In the video: two Cashu wallets for bitcoin.

Left: nostr:nprofile1qy2hwumn8ghj7etyv4hzumn0wd68ytnvv9hxgqg4waehxw309aex2mrp0yhxgctdw4eju6t09uqzpveml85hk78n2622qtnthmuwwuzexuly9v9gtf3lykjsa076magdkt6tav (PoS)

Right: cashu.me (payer)

Ecash is sent directly via NFC — no internet, no delay. Beep, boop.

Ecash is a bearer token — the money lives on your device, not on a server. That’s why it pairs so well with NFC. Pick an amount, tap to send. No talking to servers. No syncing. Just push it over. The payment is pretty much instant. A PoS can accept ecash from any mint and receive payments via Lightning.

Still early days, but we’re experimenting. Card-to-phone works, but phone-to-phone? That’s the real killer use case.

Apple famously locks down the iPhone’s NFC chip — good monopolist.

F*k that. I found a workaround.

As long as one phone (ideally the PoS) is Android, you can send data both ways between iPhone and Android.

(You don’t really own your iPhone.)

Peace!

https://m.primal.net/PnpP.mp4

Unpopular opinion:

Attendance to local Bitcoin meetups is bad opsec.

🫂

Replying to Avatar Viss

https://blog.cloudflare.com/password-reuse-rampant-half-user-logins-compromised/

the only way for cloudflare to have this data is if it is inside the ssl channel, analyzing traffic to their customers who are logging in.

ssssoooooooo i guess this makes the cloudflare logs a massive target for nation states now?

Centralisation is a risk.

Internet was supposed to be decentralised.

🫂

Ok, maybe we are discussing semantics here, but let's see if this makes sense:

If a*b=c , you don't "find c" multiplying a*b.

"c" is just the same as "a*b". It's just another way to represent a*b.

"c" is "a*b".

Numbers are not found.

Measurements could be found, but not numbers. Numbers are by themselves.

You find the 'surface of a rectangle' with sides lengths a & b, by multiplying a*b. Right.

But you don't find numbers, just measures.

Does it make sense?

As I said, maybe it's just semantics...

🫂 GN

Replying to Avatar Egge

How?

Pubkeys are mathematically derived from privkeys

So, they are calculated, not found.

It's not.

A unique strong global fiat money is not good for Bitcoin adoption.

🫂