refactor(core): Clean up BackupType usage.

core/src/apps/management/recovery_device/homescreen.py

@@ -152,7 +152,7 @@ async def _finish_recovery(secret: bytes, backup_type: BackupType) -> Success:
     storage_device.store_mnemonic_secret(
         secret, backup_type, needs_backup=False, no_backup=False
     )
-    if backup_type in (BackupType.Slip39_Basic, BackupType.Slip39_Advanced):
+    if backup_types.is_slip39_backup_type(backup_type):
         identifier = storage_recovery.get_slip39_identifier()
         extendable = storage_recovery.get_slip39_extendable()
         exponent = storage_recovery.get_slip39_iteration_exponent()

core/src/apps/management/reset_device/__init__.py

@@ -8,6 +8,7 @@ from trezor.enums import BackupType
 from trezor.ui.layouts import confirm_action
 from trezor.wire import ProcessError
 
+from .. import backup_types
 from . import layout
 
 if __debug__:
@@ -70,7 +71,7 @@ async def reset_device(msg: ResetDevice) -> Success:
     if backup_type == BAK_T_BIP39:
         # in BIP-39 we store mnemonic string instead of the secret
         secret = bip39.from_data(secret).encode()
-    elif backup_type in (BAK_T_SLIP39_BASIC, BAK_T_SLIP39_ADVANCED):
+    elif backup_types.is_slip39_backup_type(backup_type):
         # generate and set SLIP39 parameters
         storage_device.set_slip39_identifier(slip39.generate_random_identifier())
         storage_device.set_slip39_extendable(slip39.DEFAULT_EXTENDABLE_FLAG)
@@ -113,11 +114,11 @@ async def _backup_slip39_basic(encrypted_master_secret: bytes) -> None:
     group_threshold = 1
 
     # get number of shares
-    await layout.slip39_show_checklist(0, BAK_T_SLIP39_BASIC)
+    await layout.slip39_show_checklist(0, advanced=False)
     share_count = await layout.slip39_prompt_number_of_shares()
 
     # get threshold
-    await layout.slip39_show_checklist(1, BAK_T_SLIP39_BASIC)
+    await layout.slip39_show_checklist(1, advanced=False)
     share_threshold = await layout.slip39_prompt_threshold(share_count)
 
     mnemonics = _get_slip39_mnemonics(
@@ -125,21 +126,21 @@ async def _backup_slip39_basic(encrypted_master_secret: bytes) -> None:
     )
 
     # show and confirm individual shares
-    await layout.slip39_show_checklist(2, BAK_T_SLIP39_BASIC)
+    await layout.slip39_show_checklist(2, advanced=False)
     await layout.slip39_basic_show_and_confirm_shares(mnemonics[0])
 
 
 async def _backup_slip39_advanced(encrypted_master_secret: bytes) -> None:
     # get number of groups
-    await layout.slip39_show_checklist(0, BAK_T_SLIP39_ADVANCED)
+    await layout.slip39_show_checklist(0, advanced=True)
     groups_count = await layout.slip39_advanced_prompt_number_of_groups()
 
     # get group threshold
-    await layout.slip39_show_checklist(1, BAK_T_SLIP39_ADVANCED)
+    await layout.slip39_show_checklist(1, advanced=True)
     group_threshold = await layout.slip39_advanced_prompt_group_threshold(groups_count)
 
     # get shares and thresholds
-    await layout.slip39_show_checklist(2, BAK_T_SLIP39_ADVANCED)
+    await layout.slip39_show_checklist(2, advanced=True)
     groups = []
     for i in range(groups_count):
         share_count = await layout.slip39_prompt_number_of_shares(i)
@@ -206,18 +207,15 @@ def _validate_reset_device(msg: ResetDevice) -> None:
     from .. import backup_types
 
     backup_type = msg.backup_type or _DEFAULT_BACKUP_TYPE
-    if backup_type not in (
-        BAK_T_BIP39,
-        BAK_T_SLIP39_BASIC,
-        BAK_T_SLIP39_ADVANCED,
-    ):
-        raise ProcessError("Backup type not implemented")
     if backup_types.is_slip39_backup_type(backup_type):
         if msg.strength not in (128, 256):
             raise ProcessError("Invalid strength (has to be 128 or 256 bits)")
-    else:  # BIP-39
+    elif backup_type == BAK_T_BIP39:
         if msg.strength not in (128, 192, 256):
             raise ProcessError("Invalid strength (has to be 128, 192 or 256 bits)")
+    else:
+        raise ProcessError("Backup type not implemented")
+
     if msg.display_random and (msg.skip_backup or msg.no_backup):
         raise ProcessError("Can't show internal entropy when backup is skipped")
     if storage_device.is_initialized():

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

@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING
+from typing import Sequence
 
 import trezorui2
 from trezor import TR
@@ -10,11 +10,6 @@ from . import RustLayout, confirm_action, show_warning
 
 CONFIRMED = trezorui2.CONFIRMED  # global_import_cache
 
-if TYPE_CHECKING:
-    from typing import Sequence
-
-    from trezor.enums import BackupType
-
 
 async def show_share_words(
     share_words: Sequence[str],
@@ -104,18 +99,14 @@ async def select_word(
     return words[result]
 
 
-async def slip39_show_checklist(step: int, backup_type: BackupType) -> None:
-    from trezor.enums import BackupType
-
-    assert backup_type in (BackupType.Slip39_Basic, BackupType.Slip39_Advanced)
-
+async def slip39_show_checklist(step: int, advanced: bool) -> None:
     items = (
         (
             TR.reset__slip39_checklist_num_shares,
             TR.reset__slip39_checklist_set_threshold,
             TR.reset__slip39_checklist_write_down,
         )
-        if backup_type == BackupType.Slip39_Basic
+        if not advanced
         else (
             TR.reset__slip39_checklist_num_groups,
             TR.reset__slip39_checklist_num_shares,

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

@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING
+from typing import Callable, Sequence
 
 import trezorui2
 from trezor import TR
@@ -9,12 +9,6 @@ from trezor.wire.context import wait as ctx_wait
 from ..common import interact
 from . import RustLayout, raise_if_not_confirmed
 
-if TYPE_CHECKING:
-    from typing import Callable, Sequence
-
-    from trezor.enums import BackupType
-
-
 CONFIRMED = trezorui2.CONFIRMED  # global_import_cache
 
 
@@ -112,18 +106,14 @@ async def select_word(
     return words[result]
 
 
-async def slip39_show_checklist(step: int, backup_type: BackupType) -> None:
-    from trezor.enums import BackupType
-
-    assert backup_type in (BackupType.Slip39_Basic, BackupType.Slip39_Advanced)
-
+async def slip39_show_checklist(step: int, advanced: bool) -> None:
     items = (
         (
             TR.reset__slip39_checklist_set_num_shares,
             TR.reset__slip39_checklist_set_threshold,
             TR.reset__slip39_checklist_write_down_recovery,
         )
-        if backup_type == BackupType.Slip39_Basic
+        if not advanced
         else (
             TR.reset__slip39_checklist_set_num_groups,
             TR.reset__slip39_checklist_set_num_shares,