Oddbean new post about login | logout 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
นึกถึงแหวนพี่บี nostr:nprofile1qqsq4vzucuz3lzguf8tk2565dg20234rtxfkpmtscl5gkwxn0cas7dgpzpmhxue69uhkummnw3ezuamfdejszyrhwden5te0dehhxarj9ekxzmnyqyxhwumn8ghj7mn0wvhxcmmvxyajdz เลย อนาคตคงเป็นแบบ เมียโยน ecash ใส่แหวนไปทำงานวันละ 50 sats งี้ แน่ ๆ 🤣 #siamstr nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46sprpmhxue69uhhyetvv9ujuumfv9khxarj9e3k7mf0qgs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccrqsqqqqqp5vd7de
Even if this is a not a regular NFC card, I wonder how is the double-spend solved if you are offline?
It is a regular NFC card and the receiver is online
Will it work offline?
And the best thing about NFC tags is, they can be added into anything. 🧸 Do NTAG213/215/216 all have sufficient memory for this?
Which phones are you using for this?
This is nice
When will this update come? I'm excited to use this method to use ecash.
https://smilemoji.cash to test this out. You'll need a regular NFC card or tag with at least 4Kb of storage. Please DO NOT use smilemoji.cash as a real wallet because i will take it down once the PR is merged! nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46spzpmhxue69uhkummnw3ezumt0d5hsygzsm98u9kzcp35zkpc62shck8335gqtq5yt4w26xwl0pp2a72qavvpsgqqqqqqs35xprl
Each day we move closer to Satoshis vision of Bitcoin. But on trusted third party apps and payment channels. Same same but different but same nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46spzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtczypgdjn7zmpvqc6ptqud9gtutrcc6yq9s2z96h9dr80hss4wl9qwkxqcyqqqqqqgzme27s
pretty neat. Also pretty useless for anything other than a giftorang pilling. In a transaction the receiving party would need a phone to verify anyway, and the card would be just another step. nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46spzdmhxue69uhhwmm59e6hg7r09ehkuef0qgs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccrqsqqqqqp4ls3zg
Am I misunderstanding or is this putting a copy of the ecash token on the card? I guess this is good if you arent physically meeting someone but can get them a physical card, avoid encrypt and send via email, or anonymous bearer instrument. Receiver gets value, and can then reuse the card or keep as a collectible
Hi! You blocked me on X 😢 I saw this today, I guess it’s a fake you: https://x.com/callebitc/status/1848359949694284236?s=46&t=XWrYg9eiORcaHZrxw2--AQ
Can we play with it yet?
https://smilemoji.cash remember the demo i showed you?
Yes, but I didn't realize it was live and I could play with it! Fuck yes! https://image.nostr.build/31d0886651d110b72f4ead7b950f19e7e44279d128f5fc4c85a9dfb38578ccfe.jpg
Love it! As a nut maxi 🌰
Having to Trust someone’s mint is a deal breaker
Facts
I have built very similar project with LNUrl circa year ago… https://github.com/hynek-jina/lotes
My Flipper is now an ecash wallet. 😎
Dayum
I either came up with something unique or incredibly stupid, can't tell which. 😂
That is actually a really good idea. And you can type the amount and hand over just the ecash notes in that amount. And just mark them as spent locally. Much safer than dumb card which gives everything. How does one make a flipper app?
A small gadget with brains + NFC has the potential to be a very cypherpunk ecash hardware wallet. Would love to see this in reality.
I'm new to it, but I don't think any dev-type-person would have any problem. They're called FAPs (😆) and they seem to run the code like an APK or something and reference data folders. Most of it gets stored on an SD card.
This is amazing but I didn’t understand. The receiver didn’t specify an amount like you would do in a credit card payment. Is this just receive full amount stored in the card 🤔
This isn't supposed to be a debit card. It's an ecash note.
I think it's still a valid question and actually the biggest challenge in this current design. Either the card needs brains to do coin selection, or the receiver NFC reader must select the correct amounts it wants to withdraw.
Could this technically be done with a Java card?
It would be so much better with a Java card!
Awesome 👏 can’t wait to try it
This is what we need nostr:note14m0g4nc45fnw0656zy4lm007whu3df5cdxjeu5xqxtydxe38et4q8vw5lq
Is the same system as bolt cards ?
I think that bolt cards uses lnurl
🥹🥳⚡
I think this could be *so much* better with a smart Java card. Question: Is it possible that a terminal could tell the card "Hey card, select 2500 sats and send them over"? nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46sppemhxue69uhkummn9ekx7mp0qgs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccrqsqqqqqp95l460
very cool
Algo parecido hicimos con las tarjetas #lightning de #lawallet de nostr:nprofile1qqsp7fxsmxnahv3pkqsx4pn9pqm5739sp4cy5d8gkxelex5tc9qrspspz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsz9thwden5te0dehhxarj9ehhsarj9ejx2a30qy88wumn8ghj7mn0wvhxcmmv9u3cn2wv Enviar sats ⚡ desde una tarjeta a otra También un P2P o Arbolito como le llamamos en Argentina en dónde te da dinero Fiat y le cargas su tarjeta https://video.nostr.build/5b4dac69c512eb80ea3c0e732e8e1de277b150ece0eaf97bf41e85f8d53364a0.mp4 nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46spzdmhxue69uhhwmm59e6hg7r09ehkuef0qgs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccrqsqqqqqp4ls3zg
Ok, anyone seen those credit card size calculators? Imagine that, but there are no buttons, just a low voltage numeric display, slim internal battery, small solar strip, the nfc reader and you have a payment card which visually verifies how many sats it's holding 🤯 now that feels like scifi money!
คล้ายบัตรเครดิตไหม? nostr:nevent1qqs2ah52eu26yeh8a2dpz2lahhl8t7gk56vxnfv72rqr9jxnvcnu46sprpmhxue69uhhyetvv9ujumn0w3hhx6rf9emkjm30qgs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccrqsqqqqqpvynr4w
