def xfp_from_xpub(xpub):
# sometime we need to BIP32 fingerprint value: 4 bytes of ripemd(sha256(pubkey))
# UNTESTED
kk = bfh(Xpub.get_pubkey_from_xpub(xpub, []))
assert len(kk) == 33
xfp, = unpack('<I', hash_160(kk)[0:4])
return xfp
def get_password_for_storage_encryption(self) -> str:
# note: using a different password based on hw device type is highly undesirable! see #5993
derivation = get_derivation_used_for_hw_device_encryption()
xpub = self.get_xpub(derivation, "standard")
password = Xpub.get_pubkey_from_xpub(xpub, ()).hex()
return password