nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg is there a way for the users of a mint to privately and cryptographically prove how much #ecash they own? If we can sum the values and check the result against a voluntary audit by the mint, the fractional reserve problem could be solved.

If possible, wallets could implement this automatically for the mints that join the scrutiny, so users would have a real-time check of the mint correctness.