Damus
calle · 123w
It feels so damn great to top up an anonymous e-sim card with Bitcoin paid from a Chaumian mint. https://image.nostr.build/2fceb2ce5b08ed2456ad076c43b45b2cdb93088eb0de725113c9ed5bffdee7e5.jpg
Big Barry Bitcoin profile picture
Something is bugging me.

Over lightning, sender privacy is good.
Over lightning, receiver privacy is bad.
Over ecash, receiver privacy is good.
Over ecash, sender privacy has a middleman.

Of course the mint doesn't know who you are, or what your source of income is, but they may know the target payee... Doesn't this open the door to potential censorship? A mint may refuse to perform the payment.

Also, seeing that the original tokens remain valid upon a payment failure, those tokens can just become blocklisted (breaking fungibility).

Correct me if I'm wrong, but it seems as if cashu improves receiver privacy, but can compromise sender privacy/targetability unless a proxy is used when making payments.
2
calle · 123w
The mint know the destination but not who is sending it, correct. This is an intricacy of how LN works, there is a potential but complicated solution for this and that's source-based routing. In principle, a Cashu wallet could contrusct the onion themselves and pass it on to the mint, much like ho...