Correct me if I'm wrong, but the only way to view the xpub of my Jade is with a QR. Is there a way to view the xpub somewhere and not in a software wallet? The thing is, that when I scan my xpub in, for example, Sparrow wallet, it will show me a fingerprint an xpub. But how do I know that what I see is correct? I have no way to verify this outside my software wallet
Also, when you register a multi sig wallet in your Jade, you'll also see xpubs and fingerprints per seed. But how do I know if they're correct?
AFAIK,
contrary to Passport 2 Jade doesn't reveal xpub's fingerprint on its display
Passport 2 does! thus the one way to see it is to use 3
rd party software
like Sparrow.
You may also see for yourself the correctness of Sparrow
(in respect of displaying that fingeprint) via
stand-alone iancoleman BIP 39 generator.1) Launch it on the cold air gapped machine.
2) Input your Jade Seed into "BIP39 Mnemonic" field.
3) Select the correct derivation path
4) Look at "BIP32 Extended Public Key" and copy somewhere the record of this field.
5) Find SHA256 digest of this record and after this the RIPEMD160 digest of that SHA256 hash.
May do it even online as SEED can not be determined from xpub.
6) Take first four bites of RIPEMD160[SHA256]. According to
BIP32 the result you get will represent the fingeprint of relevant xpub.
How important is the finger print? I tried to compute the fingerprint, but mine was not the same as the one sparrow shows. Probably due to the fact that it show the Master Fingerprint.