Imagine a BTCPayServer point of sale receiving Cashu ecash to the merchant's Lightning wallet.

- no rug risk for merchant
- can accept ecash from a million different mints
- merchant pays LN fees
- users can remain offline while paying

Ecash is Bitcoin's credit card killer.


Mind blowing!


By the way, how's the Cashu integration with Greenlight going?


LFG


zaps are scarce


I am still trying to understand bitcoin's layer one energy usage and your talking about layer 3 already. Stop the world and let me off. 😉 How long can you hold and ecash token until you have to come online with the 1 and 0s?


Theoretically, indefinitely I would think.


🎩…tip of the hat


Interesting
nostr:nevent1qqsd4zmjdhgfygtcu0ns48zt5x95y26qusqf0nr92cr9yv98cnfsu6gpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtczypgdjn7zmpvqc6ptqud9gtutrcc6yq9s2z96h9dr80hss4wl9qwkxqcyqqqqqqg0unl3h


:gachiHYPER:


As a dev, where can I find Cashu Ecash information?


cashu.space
docs.cashu.spacw
awesome.cashu.space

we like the devs 🫡🥜


the rust mint of nostr:nprofile1qqsqfyvdlsmvj0nakmxq6c8n0c2j9uwrddjd8a95ynzn9479jhlth3gpz4mhxue69uhkummnw3ezummcw3ezuer9wchsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0q9n8wumn8ghj7enfd36x2u3wdehhxarj9emkjmn99ah8qatzx9ck5emrd4k8q6m909krsmtyddm8qdrnxpuxcue5096xxatcxekhjd3sxe6xwenc89u8gar4wsunqdmgxpa8xdekd3nk5aelvfex7ctyvdshxapaw3e82egzmrk82 used greenlight a while ago, unsure if it's still supported. I've done a bunch of preparation for breez sdk in nutshell, there isn't much left to do afaik!


Lightning is not really used, why should someone implement something like ecash which is a much much smaller bubble?

nostr:nevent1qqsd4zmjdhgfygtcu0ns48zt5x95y26qusqf0nr92cr9yv98cnfsu6gpz4mhxue69uhhyetvv9ujumn0wd68ytnzvuhsygzsm98u9kzcp35zkpc62shck8335gqtq5yt4w26xwl0pp2a72qavvpsgqqqqqqsm3ctj9


Was just working on it. Think its mostly done just need to figure out how to test it since greenlight doesnt support mutiny net and test net is a pain.

https://github.com/cashubtc/cdk/pull/275


That's amazing.


Onward 🫡


This would be an awesome payment flow for nostr:nprofile1qqs2xugc5jyguqkj36rk0syv4tmnkjdtmtperttl7x9rqjy3ustdcvcpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsq3camnwvaz7tmjv4kxz7fwd46hg6tw09mkzmrvv46zucm0d5yx7efd!


Nostr


No time limit but both the sender & receiver theoretically have a copy of the data & either can swap them.

The vendor is incentivised to swap them out ASAP.


Speechless


Ok, going to ask the important question.

Is it cash-you?

Or cash-shoo? gesundheit

Or Cash-uh?


which app can i invest in Bitcoin?


Honest mints won’t create fake ecash so you can always redeem ecash for  sats on lightning


Zap ‘em⚡


Plz 🙏


Can the eCash move from customer to seller, while they’re both offline?


Do you think mutiny wallet would work with the BTCpayServer nostr connect plug-in/NWC?


Great job!


CHARLES SCHWAB I THINK


Theres a double spend risk until receiver redeems online.


Thanks for clarifying


Imagine a BTCPayServer point of sale receiving Cashu ecash to the merchant's Lightning wallet.

- no rug risk for merchant
- can accept ecash from a million different mints
- merchant pays LN fees
- users can remain offline while paying

Ecash is Bitcoin's credit card killer.


Think of it like old school checks. The mint/bank can rug you, the person that wrote the check can try a kiting scam. So trust is involved. If you're not online to withdraw the funds to your mint or lightning wallet a bad actor can leave you holding the cashu token.

This is just my experience testing it with two self hosted implementations and running various scenarios.  So now you have two ways to create offline bitcoin "checks"
1. A PSBT that you send to the merchant that they broadcast onchain.
Or
2. A cashu token they redeem via cashu/lightning.


I thought ecash wallets can already pay lightning invoices?


I am a fairly recent “BTC crazy” (circa summer 2022) and have spent ~2 years in the rabbit hole.

I feel like my grasp on layer one is pretty solid

…layer 2 not so much…I use Zeus and until recently mutiny but find them confusing and the UX mediocre…when onboarding BTC curious friends I default to Muun to avoid overwhelming them… the initial reax to a Muun transfer is typically mind blowing (despite the sometimes goofy fees)

…I love the idea of cashew and have a couple of cashew wallets with low balances (fav so far is aqua) but the eNuts debacle really drove home the problem of trust in these systems (much like the mutiny situation has). I have yet to actively join/select a mint and use the default on aqua.

Again I love the idea of cashew and I hope the rails (mints), ux and educational tools available will continue to improve for idgits like me…
For my part I will continue to commit small amounts to testing these technologies and further my education on them…also I will attempt to be more generous with supporting the devs involved in these projects.

A big shout out to #calle👁⚡👁  for all u do in this space🙌🏽🌅