Minor enhancements

[davidmisiak]

This PR fixes #120, #126, #131, #132, #134 and allows non-Plutus signing modes for txs with required signers. Most of the changes are rather small and simple, therefore only a single PR instead of six, but I recommend reviewing commit-by-commit.

[gitmachtl]

#132 so the restriction has been lifted and now the payment key from a hw-wallet can also be used for any kind of pool-registration/pool-update transactions?

#131 😃

[davidmisiak]

#132 so the restriction has been lifted and now the payment key from a hw-wallet can also be used for any kind of pool-registration/pool-update transactions?

No, pool registration still cannot be signed with a payment key as a pool owner (i.e. by a pyament and a staking key at the same time). Signing only with a payment key as the pool operator was allowed by the Ledger app (if I'm not mistaken), it just hasn't been supported by hw-cli.

[janmazak]

Maybe a little refactor of isByronPath, but LGTM. I've not run any tests, nor searched all the source code for missed items to rename etc.

[gitmachtl]

For release notes 1.12.0:

• keeping original auxiliary data hash on transaction transform when the tx doesn't contain auxiliary data (cardano-hw-interop-lib)

that line is a bit misleading. the auxdata hash is kept if no auxiliary data is in the tx, and its corrected if the auxdata was reordered in canonical order. or is the auxdata not reordered anymore?

[davidmisiak]

the auxdata hash is kept if no auxiliary data is in the tx, and its corrected if the auxdata was reordered in canonical order

Yes, that's the case. I can try to clarify that in the release notes.