Having CoinType using the protobuf structures has several disadvantages.
- We always need to change trezor-common if we need a new field (like
bech32 prefix)
- Every time Trezor initializes it sends all this information out and
nobody cares.
- The protobuf structures add storage overhead due to their fixed size.
I also removed most of the `has_` fields except for forkid:
- `has_segwit` was merged with segwit
- `has_coin_shortcut` can be replaced by test for NULL if necessary.
The fields were reordered for better padding.
There was a signed/unsigned problem: size_t is unsigned, but we use
-1 to indicate mismatch. The problem was that when checking the input
address path, it still did this unintentionally when a mismatch was
detected, forbidding to sign with mismatched inputs, even when there
is no change address.
We now use 1 for mismatch. Also we don't allow change address anymore
if the inputs have a path of length 1. This simplifies the code a bit.
Don't hash the whole transaction if forkid is set. Instead use the
same codepath as for segwit.
Rename segwit_to_spend to authorized_amount and use it for forkid
amount and segwit amount validity checks.
Removed some duplicated code.
Segwit progress bar fixed.
Call `signing_abort` instead of `layoutHome` on all errors
The second `compile_output` does not work for user button and cannot
return -1.
Tested, see f41cbedd8becee05a830f418d13aa665125464547db5c7a6cd28f21639fe1228
and c9348040bbc2024e12dcb4a0b4806b0398646b91acf314da028c3f03dd0179fc
on testnet
Most time in signing transaction on the Trezor side is spent
in layoutProgress. This patch reduces the calls to this functions.
We also compute the progress differently, reserving 50 % for downloading
input transactions and 50 % for the signing process. This gives a
smoother experience if the input transactions are large.
