Add MicroSD PSBT Setting in Advanced

src/seedsigner/hardware/microsd.py

@@ -3,7 +3,7 @@
 
 from seedsigner.models.singleton import Singleton
 from seedsigner.models.threads import BaseThread
-from seedsigner.models.settings import Settings
+from seedsigner.models.settings import Settings, SettingsConstants
 #from seedsigner.views.view import MicroSDToastView
 from seedsigner.gui.screens.screen import MicroSDToastScreen
 
@@ -73,27 +73,29 @@ def find_psbt_files(self):
 		self.psbt_files = []
 		# only populate psbt files from the microsd in seedsigner-os
 		if Settings.HOSTNAME == Settings.SEEDSIGNER_OS:
-			for filepath in sorted(glob.glob(MicroSD.MOUNT_LOCATION + '*')):
-				if os.path.isfile(filepath):
-					with open(filepath, 'rb') as psbt_file:
-						file_header = psbt_file.read(MicroSD.MAGIC_MAX_LENGTH)
+			# only populate psbt files if setting is enabled
+			if Settings.get_instance().get_value(SettingsConstants.SETTING__MICROSD_PSBT) == SettingsConstants.OPTION__ENABLED:
+				for filepath in sorted(glob.glob(MicroSD.MOUNT_LOCATION + '*')):
+					if os.path.isfile(filepath):
+						with open(filepath, 'rb') as psbt_file:
+							file_header = psbt_file.read(MicroSD.MAGIC_MAX_LENGTH)
+
+					# binary psbt file check
+					if file_header.startswith(MicroSD.MAGIC):
+						self.psbt_files.append({
+							"name": os.path.splitext(os.path.basename(filepath))[0],
+							"filename": os.path.basename(filepath),
+							"filepath": filepath,
+							"type": "binary"
+						})
+					# base64 psbt file check
+					elif file_header.startswith(MicroSD.MAGIC_BASE64):
+						self.psbt_files.append({
+							"name": os.path.splitext(os.path.basename(filepath))[0],
+							"filename": os.path.basename(filepath),
+							"filepath": filepath,
+							"type": "base64"
+						})
 
-				# binary psbt file check
-				if file_header.startswith(MicroSD.MAGIC):
-					self.psbt_files.append({
-						"name": os.path.splitext(os.path.basename(filepath))[0],
-						"filename": os.path.basename(filepath),
-						"filepath": filepath,
-						"type": "binary"
-					})
-				# base64 psbt file check
-				elif file_header.startswith(MicroSD.MAGIC_BASE64):
-					self.psbt_files.append({
-						"name": os.path.splitext(os.path.basename(filepath))[0],
-						"filename": os.path.basename(filepath),
-						"filepath": filepath,
-						"type": "base64"
-					})
-
-			# sort the list by name of file without extension	
-			self.psbt_files = sorted(self.psbt_files, key=lambda d: d['name']) 
+				# sort the list by name of file without extension	
+				self.psbt_files = sorted(self.psbt_files, key=lambda d: d['name']) 

src/seedsigner/models/settings.py

@@ -106,8 +106,14 @@ def set_value(self, attr_name: str, value: any):
                 print(f"Removed {self.SETTINGS_FILENAME}")
             except:
                 print(f"{self.SETTINGS_FILENAME} not found to be removed")
-                
+
         self._data[attr_name] = value
+
+        # Special handling for MicroSD PSBT setting
+        if attr_name == SettingsConstants.SETTING__MICROSD_PSBT:
+            from seedsigner.hardware.microsd import MicroSD
+            MicroSD.get_instance().find_psbt_files()
+
         self.save()
 
 

src/seedsigner/models/settings_definition.py

@@ -156,6 +156,7 @@ def map_network_to_embit(cls, network) -> str:
     SETTING__CAMERA_ROTATION = "camera_rotation"
     SETTING__COMPACT_SEEDQR = "compact_seedqr"
     SETTING__BIP85_CHILD_SEEDS = "bip85_child_seeds"
+    SETTING__MICROSD_PSBT = "microsd_psbt"
     SETTING__PRIVACY_WARNINGS = "privacy_warnings"
     SETTING__DIRE_WARNINGS = "dire_warnings"
     SETTING__PARTNER_LOGOS = "partner_logos"
@@ -446,6 +447,12 @@ class SettingsDefinition:
                       visibility=SettingsConstants.VISIBILITY__ADVANCED,
                       default_value=SettingsConstants.OPTION__DISABLED),
 
+        SettingsEntry(category=SettingsConstants.CATEGORY__FEATURES,
+                      attr_name=SettingsConstants.SETTING__MICROSD_PSBT,
+                      display_name="MicroSD PSBT",
+                      visibility=SettingsConstants.VISIBILITY__ADVANCED,
+                      default_value=SettingsConstants.OPTION__DISABLED),
+
         SettingsEntry(category=SettingsConstants.CATEGORY__FEATURES,
                       attr_name=SettingsConstants.SETTING__PRIVACY_WARNINGS,
                       display_name="Show privacy warnings",

src/seedsigner/views/psbt_views.py

@@ -48,17 +48,17 @@ def run(self):
 
         # Read PSBT file select if it exists
         psbt_file = self.controller.microsd.psbt_files[selected_menu_num]
-        tx = PSBT.PSBT
+        tx = PSBT
 
         if os.path.exists(psbt_file["filepath"]):
             with open(psbt_file["filepath"], 'rb') as f:
                 data = f.read()
 
             if psbt_file["type"] == "binary":
-                tx = psbt.PSBT.parse(data)
+                tx = PSBT.parse(data)
             elif psbt_file["type"] == "base64":
                 raw = a2b_base64(data)
-                tx = psbt.PSBT.parse(raw)
+                tx = PSBT.parse(raw)
             self.controller.psbt = tx
             self.controller.psbt_parser = None
             self.controller.psbt_file = psbt_file
@@ -573,6 +573,24 @@ def run(self):
         signed_filepath = MicroSD.MOUNT_LOCATION + signed_filename
         increment = 0
 
+        # verify microsd directory exists and is writable, display message warning on failure
+        selected_menu_num = 0
+        while (not os.path.exists(MicroSD.MOUNT_LOCATION) or not os.access(MicroSD.MOUNT_LOCATION, os.W_OK)):
+            selected_menu_num = WarningScreen(
+                status_headline="MicroSD Card Missing!",
+                text="MicroSD Card is required to write out signed PSBT file.",
+                button_data=["Continue", "Exit"],
+            ).display()
+
+            # if users chooses to exit, consider the PSBT workflow complete
+            if selected_menu_num == 1:
+                # We're done with this PSBT. Remove all related data
+                self.controller.psbt = None
+                self.controller.psbt_parser = None
+                self.controller.psbt_seed = None
+                self.controller.psbt_file = None
+                return Destination(MainMenuView)
+
         # if signed filename already exists on disk, add incremented number to the end of the file name
         while os.path.exists(signed_filepath):
             increment += 1