What happens to sats that were minted on my node to ecash that I sent to my brother, but now my LNbits app is broken. Just because he can’t access the token, the sats will still be available on my node for later correct?
The blinding scheme used in Cashu means that the mint does not know whether ecash is sent from Alice to Carol.
to get a more in-depth understanding of the cryptography used in Cashu, check out this awesome post by thunderbiscuit.
https://delvingbitcoin.org/t/building-intuition-for-the-cashu-blind-signature-scheme/506
Discussion
You did not mint sats, you minted tokens. Your sats will still be available (in your LN node)