chore(core): make minor improvements

core/src/apps/cardano/layout.py

@@ -9,6 +9,7 @@ from trezor.enums import (
 )
 from trezor.strings import format_amount
 from trezor.ui import layouts
+from trezor.ui.layouts import confirm_metadata, confirm_properties
 
 from apps.common.paths import address_n_to_str
 
@@ -21,9 +22,6 @@ from .helpers.utils import (
     format_stake_pool_id,
 )
 
-confirm_metadata = layouts.confirm_metadata  # global_import_cache
-confirm_properties = layouts.confirm_properties  # global_import_cache
-
 if TYPE_CHECKING:
     from typing import Literal
 

core/src/boot.py

@@ -26,8 +26,8 @@ _WELCOME_SCREEN_MS = 1200  # how long do we want to show welcome screen (minimum
 
 def enforce_welcome_screen_duration() -> None:
     """Make sure we will show the welcome screen for appropriate amount of time."""
-    # Not wasting the time in debug builds (saves time during emulator debugging)
-    if __debug__:
+    # Not wasting the time in emulator debug builds (debugging and development)
+    if __debug__ and utils.EMULATOR:
         return
     while utime.ticks_ms() - welcome_screen_start_ms < _WELCOME_SCREEN_MS:
         utime.sleep_ms(100)

core/src/trezor/ui/layouts/common.py

@@ -38,6 +38,7 @@ async def interact(
     br_code: ButtonRequestType = ButtonRequestType.Other,
 ) -> Any:
     if hasattr(layout, "page_count") and layout.page_count() > 1:  # type: ignore [Cannot access member "page_count" for type "LayoutType"]
+        # We know for certain how many pages the layout will have
         await button_request(ctx, br_type, br_code, pages=layout.page_count())  # type: ignore [Cannot access member "page_count" for type "LayoutType"]
         return await ctx.wait(layout)
     else:

core/src/trezor/ui/layouts/tt_v2/__init__.py

@@ -189,7 +189,6 @@ class RustLayout(ui.Layout):
 
         touch = loop.wait(io.TOUCH)
         self._first_paint()
-        # self.layout.bounds()
         while True:
             # Using `yield` instead of `await` to avoid allocations.
             event, x, y = yield touch
@@ -200,7 +199,6 @@ class RustLayout(ui.Layout):
             if msg is not None:
                 raise ui.Result(msg)
             self._paint()
-            # self.layout.bounds()
 
     def handle_timers(self) -> loop.Task:  # type: ignore [awaitable-is-generator]
         while True:
@@ -408,12 +406,12 @@ async def show_address(
     xpubs: Sequence[str] = (),
 ) -> None:
     send_button_request = True
+    title = (
+        "RECEIVE ADDRESS\n(MULTISIG)"
+        if multisig_index is not None
+        else "RECEIVE ADDRESS"
+    )
     while True:
-        title = (
-            "RECEIVE ADDRESS\n(MULTISIG)"
-            if multisig_index is not None
-            else "RECEIVE ADDRESS"
-        )
         layout = RustLayout(
             trezorui2.confirm_address(
                 title=title,
@@ -825,7 +823,7 @@ def confirm_value(
     value: str,
     description: str,
     br_type: str,
-    br_code: ButtonRequestType = ButtonRequestType.Other,
+    br_code: ButtonRequestType = BR_TYPE_OTHER,
     *,
     verb: str | None = None,
     subtitle: str | None = None,
@@ -1052,7 +1050,7 @@ async def confirm_coinjoin(
                 )
             ),
             "coinjoin_final",
-            ButtonRequestType.Other,
+            BR_TYPE_OTHER,
         )
     )
 
@@ -1067,7 +1065,7 @@ async def confirm_sign_identity(
         data=identity,
         description=challenge_visual + "\n" if challenge_visual else "",
         br_type="sign_identity",
-        br_code=ButtonRequestType.Other,
+        br_code=BR_TYPE_OTHER,
     )
 
 
@@ -1087,7 +1085,7 @@ async def confirm_signverify(
         title,
         address,
         "Confirm address:",
-        br_code=ButtonRequestType.Other,
+        br_code=BR_TYPE_OTHER,
     )
 
     await confirm_blob(
@@ -1096,7 +1094,7 @@ async def confirm_signverify(
         title,
         message,
         "Confirm message:",
-        br_code=ButtonRequestType.Other,
+        br_code=BR_TYPE_OTHER,
     )
 
 
@@ -1170,12 +1168,11 @@ async def request_pin_on_device(
             wrong_pin=wrong_pin,
         )
     )
-    while True:
-        result = await ctx.wait(dialog)
-        if result is CANCELLED:
-            raise PinCancelled
-        assert isinstance(result, str)
-        return result
+    result = await ctx.wait(dialog)
+    if result is CANCELLED:
+        raise PinCancelled
+    assert isinstance(result, str)
+    return result
 
 
 class RustProgress:

core/src/trezor/ui/layouts/tt_v2/reset.py

@@ -9,7 +9,7 @@ from ..common import interact
 from . import RustLayout
 
 if TYPE_CHECKING:
-    from typing import Callable, Sequence, List
+    from typing import Callable, Sequence
     from trezor.enums import BackupType
     from trezor.wire import GenericContext
 
@@ -17,8 +17,8 @@ if TYPE_CHECKING:
 CONFIRMED = trezorui2.CONFIRMED  # global_import_cache
 
 
-def _split_share_into_pages(share_words: Sequence[str], per_page: int = 4) -> List[str]:
-    pages = []
+def _split_share_into_pages(share_words: Sequence[str], per_page: int = 4) -> list[str]:
+    pages: list[str] = []
     current = ""
 
     for i, word in enumerate(share_words):

core/src/trezor/wire/__init__.py

@@ -466,7 +466,13 @@ def failure(exc: BaseException) -> Failure:
     elif isinstance(exc, InvalidSessionError):
         return Failure(code=FailureType.InvalidSession, message="Invalid session")
     else:
-        return Failure(code=FailureType.FirmwareError, message="Firmware error")
+        # NOTE: when receiving generic `FirmwareError` on non-debug build,
+        # change the `if __debug__` to `if True` to get the full error message.
+        if __debug__:
+            message = str(exc)
+        else:
+            message = "Firmware error"
+        return Failure(code=FailureType.FirmwareError, message=message)
 
 
 def unexpected_message() -> Failure: