Cardano small updates

[gabrielKerekes]

This PR contains small refactorings and updates for the Cardano app.

• address validation has so far been coupled with address derivation - this PR splits out address validation - Decouple address parameters validation from address derivation vacuumlabs/trezor-firmware#59
• we also decided to introduce validation to check that no extra fields are set in address parameters
• transaction outputs can no longer contain both address and address_parameters - previously if both were set were set address would simply be ignored and address_parameters would be used
• we decided to re-introduce the MAX_TX_OUTPUT_SIZE limitation so that Trezor wouldn't be able to create an output, which it later wouldn't be able to spend because of memory constraints - Reintroduce utxo max size limitation vacuumlabs/trezor-firmware#58

[matejcik]

very nice
one point about typing annotations, otherwise LGTM

[matejcik]

also please add a changelog per https://docs.trezor.io/trezor-firmware/misc/changelog.html

[matejcik]

it seems some of your address test vectors are wrong now: https://gitlab.com/satoshilabs/trezor/trezor-firmware/-/jobs/1318118622

[gabrielKerekes]

also please add a changelog per https://docs.trezor.io/trezor-firmware/misc/changelog.html

Changelogs added - 0010bbc. I am not sure if two entries are desirable or just one would be enough similar to Cardano: refactor and improve address validation and reintroduce maximum transaction output size. Or perhaps there should be one entry for each point in the PR description.

it seems some of your address test vectors are wrong now: https://gitlab.com/satoshilabs/trezor/trezor-firmware/-/jobs/1318118622

Indeed. Luckily nothing got broken, it really was just an invalid test vector. Fixed in 7c573c9.

[matejcik]

I am not sure if two entries are desirable

these entries seem appropriate 👍

in the meantime we changed import paths so you got some conflicts, please squash the fixups and rebase on top of master

[matejcik]

changed import paths

for messages, instead of from trezor.messages.Foo import Foo it's just from trezor.messages import Foo
for enums, instead of from trezor.messages import FooEnum it's from trezor.enums import FooEnum, and this FooEnum name is now valid for typechecking, so no more EnumTypeFooEnum

[gabrielKerekes]

please squash the fixups and rebase on top of master

Done.

[matejcik]

and done, thanks!