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0 sats \ 6 replies \ @SwapMarket 3 Aug \ on: Long-form Content: ecash (Transacting with ecash while offline) by gandlaf21 bitcoin
  1. Offline wending machines are possible with Lightning, if the payer has internet access.
  2. "It cannot contain duplicate proofs (double-spend)" How can an offline receiver verify this? A customized mint can issue Cashu coins not backed by anythig. Cashu are scam.
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0 sats \ 5 replies \ @m0wer OP 4 Aug
Sure you have to trust the mint. But you can set a collection of trusted mints beforehand.
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0 sats \ 4 replies \ @SwapMarket 4 Aug
I can't, because I don't normally know in advance what mint the payer will use. And I don't want to trust anyone!
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0 sats \ 3 replies \ @m0wer OP 4 Aug
There is no way to solve the trust issue offline. Bitcoin solves that hard problem by creating a decentralized trustless ledger. Offline you don't have that possibility.
You should avoid using Cashu in general, because there are better options. What's a better option for this case?
For a vending machine operator, the risk of double spends might be worth it compared to the cost of having an internet connection for the machine. It's all about tradeoffs.
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21 sats \ 1 reply \ @SwapMarket 4 Aug
This: https://bitcointalk.org/index.php?topic=5381769.0
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0 sats \ 0 replies \ @m0wer OP 4 Aug
Yes that's very nice.
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0 sats \ 0 replies \ @SwapMarket 4 Aug
And no, I don't use cashu and fight everyone propagating this scammy idea. No one in their right mind should accept Cashu. It only works for the payers with own mints, they are driving the narrative.
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