Nostr: show QR of npub

internal_filesystem/apps/com.micropythonos.nostr/assets/fullscreen_qr.py

@@ -6,7 +6,23 @@ class FullscreenQR(Activity):
     # No __init__() so super.__init__() will be called automatically
 
     def onCreate(self):
-        receive_qr_data = self.getIntent().extras.get("receive_qr_data")
+        print("FullscreenQR.onCreate() called")
+        intent = self.getIntent()
+        print(f"Got intent: {intent}")
+        extras = intent.extras
+        print(f"Got extras: {extras}")
+        receive_qr_data = extras.get("receive_qr_data")
+        print(f"Got receive_qr_data: {receive_qr_data}")
+        
+        if not receive_qr_data:
+            print("ERROR: receive_qr_data is None or empty!")
+            error_screen = lv.obj()
+            error_label = lv.label(error_screen)
+            error_label.set_text("No QR data")
+            error_label.center()
+            self.setContentView(error_screen)
+            return
+        
         qr_screen = lv.obj()
         qr_screen.set_scrollbar_mode(lv.SCROLLBAR_MODE.OFF)
         qr_screen.set_scroll_dir(lv.DIR.NONE)
@@ -18,5 +34,8 @@ class FullscreenQR(Activity):
         big_receive_qr.center()
         big_receive_qr.set_style_border_color(lv.color_white(), 0)
         big_receive_qr.set_style_border_width(0, 0);
+        print(f"Updating QR code with data: {receive_qr_data[:20]}...")
         big_receive_qr.update(receive_qr_data, len(receive_qr_data))
+        print("QR code updated, setting content view")
         self.setContentView(qr_screen)
+        print("Content view set")

internal_filesystem/apps/com.micropythonos.nostr/assets/nostr_app.py

@@ -1,6 +1,59 @@
 import lvgl as lv
 
 from mpos import Activity, Intent, ConnectivityManager, pct_of_display_width, pct_of_display_height, SharedPreferences, SettingsActivity
+from fullscreen_qr import FullscreenQR
+
+class ShowNpubQRActivity(Activity):
+    """Activity that computes npub from nsec and displays it as a QR code"""
+    
+    def onCreate(self):
+        try:
+            print("ShowNpubQRActivity.onCreate() called")
+            prefs = self.getIntent().extras.get("prefs")
+            print(f"Got prefs: {prefs}")
+            nsec = prefs.get_string("nostr_nsec")
+            print(f"Got nsec: {nsec[:20] if nsec else 'None'}...")
+            
+            if not nsec:
+                print("ERROR: No nsec configured")
+                # Show error screen
+                error_screen = lv.obj()
+                error_label = lv.label(error_screen)
+                error_label.set_text("No nsec configured")
+                error_label.center()
+                self.setContentView(error_screen)
+                return
+            
+            # Compute npub from nsec
+            print("Importing PrivateKey...")
+            from nostr.key import PrivateKey
+            print("Computing npub from nsec...")
+            if nsec.startswith("nsec1"):
+                print("Using from_nsec()")
+                private_key = PrivateKey.from_nsec(nsec)
+            else:
+                print("Using hex format")
+                private_key = PrivateKey(bytes.fromhex(nsec))
+            
+            npub = private_key.public_key.bech32()
+            print(f"Computed npub: {npub[:20]}...")
+            
+            # Launch FullscreenQR activity with npub as QR data
+            print("Creating FullscreenQR intent...")
+            intent = Intent(activity_class=FullscreenQR)
+            intent.putExtra("receive_qr_data", npub)
+            print(f"Starting FullscreenQR activity with npub: {npub[:20]}...")
+            self.startActivity(intent)
+        except Exception as e:
+            print(f"ShowNpubQRActivity exception: {e}")
+            # Show error screen
+            error_screen = lv.obj()
+            error_label = lv.label(error_screen)
+            error_label.set_text(f"Error: {e}")
+            error_label.center()
+            self.setContentView(error_screen)
+            import sys
+            sys.print_exception(e)
 
 class NostrApp(Activity):
 
@@ -133,6 +186,7 @@ class NostrApp(Activity):
             {"title": "Nostr Private Key (nsec)", "key": "nostr_nsec", "placeholder": "nsec1...", "should_show": self.should_show_setting},
             {"title": "Nostr Follow Public Key (npub)", "key": "nostr_follow_npub", "placeholder": "npub1...", "should_show": self.should_show_setting},
             {"title": "Nostr Relay", "key": "nostr_relay", "placeholder": "wss://relay.example.com", "should_show": self.should_show_setting},
+            {"title": "Show My Public Key (npub)", "key": "show_npub_qr", "ui": "activity", "activity_class": ShowNpubQRActivity, "dont_persist": True, "should_show": self.should_show_setting},
         ])
         self.startActivity(intent)
 

internal_filesystem/apps/com.micropythonos.nostr/assets/nostr_client.py

@@ -23,7 +23,7 @@ class NostrEvent:
 class NostrClient():
     """Simple Nostr event subscriber that connects to a relay and subscribes to a public key's events"""
 
-    EVENTS_TO_SHOW = 10
+    EVENTS_TO_SHOW = 50
     
     relay = None
     nsec = None

internal_filesystem/lib/mpos/ui/settings_activity.py

@@ -67,13 +67,13 @@ class SettingsActivity(Activity):
                 focusgroup.add_obj(setting_cont)
 
     def focus_container(self, container):
-        print(f"container {container} focused, setting border...")
+        #print(f"container {container} focused, setting border...")
         container.set_style_border_color(lv.theme_get_color_primary(None),lv.PART.MAIN)
         container.set_style_border_width(1, lv.PART.MAIN)
         container.scroll_to_view(True) # scroll to bring it into view
 
     def defocus_container(self, container):
-        print(f"container {container} defocused, unsetting border...")
+        #print(f"container {container} defocused, unsetting border...")
         container.set_style_border_width(0, lv.PART.MAIN)
 
     def startSettingActivity(self, setting):