fix CLI exception handling

electrum/commands.py

@@ -107,18 +107,14 @@ def command(s):
                     wallet_path = kwargs.pop('wallet_path')
                     wallet = daemon.wallets.get(wallet_path)
                     if wallet is None:
-                        return {'error': "Wallet not loaded. try 'electrum load_wallet'" }
+                        raise Exception('wallet not loaded')
                     kwargs['wallet'] = wallet
             else:
-                # we are offline. the wallet must have been passed
-                pass
+                # we are offline. the wallet must have been passed if required
+                wallet = kwargs.get('wallet')
             if cmd.requires_password and password is None and wallet.has_password():
-                return {'error': 'Password required' }
-            try:
-                return await func(*args, **kwargs)
-            except Exception as e:
-                #traceback.print_exc(sys.stderr)
-                return {'error':str(e)}
+                raise Exception('Password required')
+            return await func(*args, **kwargs)
         return func_wrapper
     return decorator
 

electrum/daemon.py

@@ -326,10 +326,11 @@ class Daemon(Logger):
         except AuthenticationError:
             return web.Response(text='Forbidden', status=403)
         request = await request.text()
-        #self.logger.info(f'handling request: {request}')
         response = await jsonrpcserver.async_dispatch(request, methods=self.methods)
         if isinstance(response, jsonrpcserver.response.ExceptionResponse):
             self.logger.error(f"error handling request: {request}", exc_info=response.exc)
+            # this exposes the error message to the client
+            response.message = str(response.exc)
         if response.wanted:
             return web.json_response(response.deserialized(), status=response.http_status)
         else:
@@ -441,7 +442,11 @@ class Daemon(Logger):
         for x in cmd.options:
             kwargs[x] = (config_options.get(x) if x in ['password', 'new_password'] else config.get(x))
         func = getattr(self.cmd_runner, cmd.name)
-        result = await func(*args, **kwargs)
+        # fixme: not sure how to retrieve message in jsonrpcclient
+        try:
+            result = await func(*args, **kwargs)
+        except Exception as e:
+            result = {'error':str(e)}
         return result
 
     def run_daemon(self):