Document Nostr key QR codes

README.md

@@ -266,6 +266,9 @@ SeedPass supports storing more than just passwords and 2FA secrets. You can also
 - **Seed Phrase** – generate a BIP-39 mnemonic and keep it encrypted until needed.
 - **PGP Key** – derive an OpenPGP key pair from your master seed.
 - **Nostr Key Pair** – store the index used to derive an `npub`/`nsec` pair for Nostr clients.
+  When you retrieve one of these entries, SeedPass can display QR codes for the
+  keys. The `npub` is wrapped in the `nostr:` URI scheme so any client can scan
+  it, while the `nsec` QR is shown only after a security warning.
 
 
 ### Managing Multiple Seeds

src/password_manager/manager.py

@@ -1147,6 +1147,12 @@ class PasswordManager:
                 )
             else:
                 print(colored(f"nsec: {nsec}", "cyan"))
+            if confirm_action("Show QR code for npub? (Y/N): "):
+                TotpManager.print_qr_code(f"nostr:{npub}")
+            if confirm_action(
+                "WARNING: Displaying the nsec QR reveals your private key. Continue? (Y/N): "
+            ):
+                TotpManager.print_qr_code(nsec)
             try:
                 self.sync_vault()
             except Exception as nostr_error:  # pragma: no cover - best effort
@@ -1342,6 +1348,12 @@ class PasswordManager:
                         )
                     else:
                         print(colored(f"nsec: {nsec}", "cyan"))
+                    if confirm_action("Show QR code for npub? (Y/N): "):
+                        TotpManager.print_qr_code(f"nostr:{npub}")
+                    if confirm_action(
+                        "WARNING: Displaying the nsec QR reveals your private key. Continue? (Y/N): "
+                    ):
+                        TotpManager.print_qr_code(nsec)
                     if notes:
                         print(colored(f"Notes: {notes}", "cyan"))
                 except Exception as e:

src/tests/test_nostr_qr.py

@@ -0,0 +1,60 @@
+import sys
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+from helpers import create_vault, TEST_SEED, TEST_PASSWORD
+
+sys.path.append(str(Path(__file__).resolve().parents[1]))
+
+from password_manager.entry_management import EntryManager
+from password_manager.backup import BackupManager
+from password_manager.manager import PasswordManager, EncryptionMode, TotpManager
+from password_manager.config_manager import ConfigManager
+
+
+class FakeNostrClient:
+    def __init__(self, *args, **kwargs):
+        self.published = []
+
+    def publish_snapshot(self, data: bytes):
+        self.published.append(data)
+        return None, "abcd"
+
+
+def test_show_qr_for_nostr_keys(monkeypatch):
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        vault, enc_mgr = create_vault(tmp_path, TEST_SEED, TEST_PASSWORD)
+        cfg_mgr = ConfigManager(vault, tmp_path)
+        backup_mgr = BackupManager(tmp_path, cfg_mgr)
+        entry_mgr = EntryManager(vault, backup_mgr)
+
+        pm = PasswordManager.__new__(PasswordManager)
+        pm.encryption_mode = EncryptionMode.SEED_ONLY
+        pm.encryption_manager = enc_mgr
+        pm.vault = vault
+        pm.entry_manager = entry_mgr
+        pm.backup_manager = backup_mgr
+        pm.parent_seed = TEST_SEED
+        pm.nostr_client = FakeNostrClient()
+        pm.fingerprint_dir = tmp_path
+        pm.is_dirty = False
+        pm.secret_mode_enabled = False
+
+        idx = entry_mgr.add_nostr_key("main")
+        npub, _ = entry_mgr.get_nostr_key_pair(idx, TEST_SEED)
+
+        monkeypatch.setattr("builtins.input", lambda *a, **k: str(idx))
+        responses = iter([True, False])
+        monkeypatch.setattr(
+            "password_manager.manager.confirm_action",
+            lambda *_a, **_k: next(responses),
+        )
+        called = []
+        monkeypatch.setattr(
+            "password_manager.manager.TotpManager.print_qr_code",
+            lambda data: called.append(data),
+        )
+
+        pm.handle_retrieve_entry()
+        assert called == [f"nostr:{npub}"]