feat: integrate Nostr keypair generation with LNBits user accounts

- Added Nostr private key storage to the accounts table via a new migration.
- Updated Account model to include Nostr private key field.
- Modified user creation process to automatically generate Nostr keypairs.
- Introduced new API endpoints for retrieving Nostr public keys and user information including private keys.
- Implemented tests to verify Nostr keypair generation and account model updates.

misc-aio/test_nostr_integration.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""
+Test script to verify Nostr keypair integration with LNBits User model
+"""
+
+import sys
+import os
+
+# Add the lnbits directory to the path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'lnbits'))
+
+def test_nostr_keypair_generation():
+    """Test that we can generate Nostr keypairs"""
+    try:
+        from lnbits.utils.nostr import generate_keypair
+        private_key, public_key = generate_keypair()
+        print(f"✓ Nostr keypair generation works")
+        print(f"  Private key: {private_key[:16]}...")
+        print(f"  Public key: {public_key}")
+        return True
+    except Exception as e:
+        print(f"✗ Nostr keypair generation failed: {e}")
+        return False
+
+def test_account_model():
+    """Test that the Account model includes prvkey field"""
+    try:
+        from lnbits.core.models.users import Account
+        account = Account(
+            id="test123",
+            username="testuser",
+        )
+        print(f"✓ Account model includes prvkey field")
+        print(f"  prvkey: {account.prvkey}")
+        print(f"  pubkey: {account.pubkey}")
+        return True
+    except Exception as e:
+        print(f"✗ Account model test failed: {e}")
+        return False
+
+def test_user_model():
+    """Test that the User model includes pubkey field"""
+    try:
+        from lnbits.core.models.users import User
+        user = User(
+            id="test123",
+            created_at=None,
+            updated_at=None,
+            pubkey="test_public_key"
+        )
+        print(f"✓ User model includes pubkey field")
+        print(f"  pubkey: {user.pubkey}")
+        return True
+    except Exception as e:
+        print(f"✗ User model test failed: {e}")
+        return False
+
+def test_migration():
+    """Test that the migration function exists"""
+    try:
+        from lnbits.core.migrations import m034_add_nostr_private_key_to_accounts
+        print(f"✓ Migration function exists")
+        return True
+    except Exception as e:
+        print(f"✗ Migration test failed: {e}")
+        return False
+
+def main():
+    print("Testing Nostr integration with LNBits...")
+    print("=" * 50)
+    
+    tests = [
+        test_nostr_keypair_generation,
+        test_account_model,
+        test_user_model,
+        test_migration,
+    ]
+    
+    passed = 0
+    total = len(tests)
+    
+    for test in tests:
+        if test():
+            passed += 1
+        print()
+    
+    print("=" * 50)
+    print(f"Tests passed: {passed}/{total}")
+    
+    if passed == total:
+        print("✓ All tests passed! Nostr integration is ready.")
+    else:
+        print("✗ Some tests failed. Please check the implementation.")
+
+if __name__ == "__main__":
+    main()