Nostr Web Client

We had a Cashu dev call yesterday and four (!!) new wallets based on NIP-60 were presented. NIP-60 is a standard for storing ecash on no:str relays, encrypted with your keys.

You open a wallet for the first time, login with your nsec, and boom, your balance appears.

Don't like this wallet? Switch to another one, enter your nsec, and your ecash appears there too.

This is pretty insane. If you're building a wallet, you're immediately plugged in into a social net. Now you can also carry your money around from app to app, or website to website.

If you're a Cashu dev, you should join our monthly open dev calls. Hit me up!

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Discussion

BTCPhoto 1y ago

So if I have a balance in Nutsack will it appear on the other wallets too?

calle 1y ago

Yes, on all other wallets that support NIP-60

elsat 1y ago

What are the criteria for interoperability nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg and what are the wallets that currently support?

https://github.com/nostrability/nostrability/issues/107

calle 1y ago

Thank you for raising that. Best person to ask it nostr:nprofile1qqs04xzt6ldm9qhs0ctw0t58kf4z57umjzmjg6jywu0seadwtqqc75sprfmhxue69uhhq7tjv9kkjepwve5kzar2v9nzucm0d5hsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0qythwumn8ghj7un9d3shjtnswf5k6ctv9ehx2ap0y8qdrm and implementors. I think nostr:nprofile1qqsxkxud4s60l3sagexlamcquj5y5czwzuh0vwglkc5jj0t0zenpfrqpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsq3samnwvaz7tmjv4kxz7fwwdhx7un59eek7cmfv9kqmw4ame is rolling his own version of NIP-60 but others looked compatible.

JeffG 1y ago

Why can't I zap you?

calle 1y ago

Good q, a bad client wiped my profile apparently. Can you try?

JeffG 1y ago

Back in action! ⚡

So Tachi 1y ago

you can nutszap on @nutscash

JeffG 1y ago

NIP-60 (aka "relays are the wallet") is one of the most insanely cool and under-appreciated developments on nostr recently.

#bullish

nostr:note1lqw2vhtcnfpc0sqm6puyf80pj7tnt62lala43j9ewf7f0dswsd2qpzge6u

Sirius 1y ago

Apparently cashu.me is not nip-60 yet — is there some other wallet I should use on iris.to instead?

Is nip-60 on public relays a privacy tradeoff? I imagine it reveals when there's been activity in your wallet.

calle 1y ago

cashu.me is still far from being NIP-60 ready. There are code bases you can have a look at, probably the simplest one being nutsack.me - nostr:nprofile1qqs04xzt6ldm9qhs0ctw0t58kf4z57umjzmjg6jywu0seadwtqqc75sprfmhxue69uhhq7tjv9kkjepwve5kzar2v9nzucm0d5hsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0qythwumn8ghj7un9d3shjtnswf5k6ctv9ehx2ap0y8qdrm's NDK will/does support NIP-60 wallets afaik. We use NDK in cashu.me as well.

calle 1y ago

Privacy: NIP-60 proposes a new event kind so it would be visible that there's activity. The ecash coins themselves are encrypted but the number of coins (which is visible) *might* allow correlations (realistically speaking, I'm not concerned by this). Example: "Martti seems to have 10 encrypted coins on this relay... I'm guessing that's around 10000 sats but who knows, could be 10, could be a million".

It might make sense to use a different key pair for NIP-60 that's derived from your OG keys, but that would be harder to agree on.

NIP-61 is about using these ecash coins for zaps so the whole idea there is to be public.

Machu Pikacchu 1y ago

In this example the eCash is publicly known to be locked to Martti’s npub? Is it possible to make these similar to silent payments [1]?

1. https://bitcoinops.org/en/topics/silent-payments/

Corrado Alvaro 1y ago

Sounds like a ton of cool stuff happening.

Francis Mars 1y ago

wen Mastering Cashu?

calle 1y ago

lol love it

calle 1y ago

nostr:nevent1qqsdev9g8nh5u4z7cu52rh3jqy78l6paufw6mc9qesnw37fyknvn5qspremhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet59upzq5xeflpdskqvdq4swxj59793uvdzqzc9pzatjk3nhmcg2h0js8trqvzqqqqqqy52mxml

Francis Mars 1y ago

ahahaha beautiful!!!

Gigi 1y ago

👀

nostr:nevent1qqs0s89xt4uf5su8cqdaq7zynhse09e4a907l76cezuhylyhkc8gx4qpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsygzsm98u9kzcp35zkpc62shck8335gqtq5yt4w26xwl0pp2a72qavvpsgqqqqqqs56ynfw

Gigi 1y ago

Love to see it.

Melvin Carvalho 1y ago

I like no:str ... calle is a poet

So Tachi 1y ago

would be happy to join those calls

Igno⚡ 1y ago

El internet del dinero está aquí

nostr:nevent1qqs0s89xt4uf5su8cqdaq7zynhse09e4a907l76cezuhylyhkc8gx4qpz4mhxue69uhkummnw3ezummcw3ezuer9wchsygzsm98u9kzcp35zkpc62shck8335gqtq5yt4w26xwl0pp2a72qavvpsgqqqqqqsplknkg

Zoltán 1y ago

Amazing! 😯 Thank you very much! 🥳

Tim Bouma 1y ago

NIP-60 is the way of the future for wallets.

https://github.com/trbouma/safebox

Niel Liesmons 1y ago

UI/UX-wise I can only incentivize a user to do a limited number of things.

Currently my priority is incentivizing the spinning up of their own private relay(s).

#noobquestion

If relays become npubs and a user owns it with the corresponding nsec, can that nsec also **be** the safebox?

Basically, how much can a private relay and your concept of a safebox technically be the same thing?

If it's the same trade off in terms of security, trust, privacy, etc... and if it's all "nostr events looking for safe storage", it should only requirev one extra nsec to hodl, ideally.

Tim Bouma 1y ago

I have implemented the capability of a safebox being generated with an existing nsec. That means a relay with an npub can have its own wallet, with itself being the home relay.

The other cool thing, is that any device with its own nsec can instantiate its own wallet, so long as it knows what relay to start on.

Only starting the explore the possibilities of this new approach!

Tim Bouma 1y ago

My goal is to build a very boring backend component that someone could bolt into their own service or into an end user app. I am inspired by nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm simplicity and like to take that simplicity one step further by enabling an enduser wallet app and lightning address service that attaches to a safebox that lives in the network controlled by the user.