fix validation rules so description_hash works.

lnbits/decorators.py

@@ -36,7 +36,7 @@ def api_validate_post_request(*, schema: dict):
                 return jsonify({"message": "Content-Type must be `application/json`."}), HTTPStatus.BAD_REQUEST
 
             v = Validator(schema)
-            g.data = {key: (request.json[key] if key in request.json else None) for key in schema.keys()}
+            g.data = {key: request.json[key] for key in schema.keys() if key in request.json}
 
             if not v.validate(g.data):
                 return jsonify({"message": f"Errors in request data: {v.errors}"}), HTTPStatus.BAD_REQUEST
@@ -56,7 +56,7 @@ def check_user_exists(param: str = "usr"):
             allowed_users = getenv("LNBITS_ALLOWED_USERS", "all")
 
             if allowed_users != "all" and g.user.id not in allowed_users.split(","):
-                abort(HTTPStatus.UNAUTHORIZED, f"User not authorized.")
+                abort(HTTPStatus.UNAUTHORIZED, "User not authorized.")
 
             return view(**kwargs)