From 3c015fa34fef1195cb16034c0ca0af787c77ba49 Mon Sep 17 00:00:00 2001
From: The MMGen Project <mmgen@tuta.io>
Date: Sat, 5 Feb 2022 13:32:53 +0000
Subject: [PATCH] minor fixes and cleanups

---
 mmgen/main_tool.py   | 1 +
 mmgen/tool/common.py | 4 +++-
 mmgen/tool/file.py   | 1 +
 mmgen/wallet.py      | 2 +-
 4 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/mmgen/main_tool.py b/mmgen/main_tool.py
index f4b47d28..02b8cfa1 100755
--- a/mmgen/main_tool.py
+++ b/mmgen/main_tool.py
@@ -229,6 +229,7 @@ def process_args(cmd,cmd_args,cls):
 	u_nkwargs = len(cmd_args) - len(c_args)
 	u_kwargs = {}
 	if flag == 'VAR_ARGS':
+		cmd_args = ['dummy_arg'] + cmd_args
 		t = [a.split('=',1) for a in cmd_args if '=' in a]
 		tk = [a[0] for a in t]
 		tk_bad = [a for a in tk if a not in c_kwargs]
diff --git a/mmgen/tool/common.py b/mmgen/tool/common.py
index 9f2d38d0..9027eb12 100755
--- a/mmgen/tool/common.py
+++ b/mmgen/tool/common.py
@@ -20,10 +20,12 @@
 tool/common.py: Base class and shared routines for the 'mmgen-tool' utility
 """
 
+from ..objmethods import MMGenObject
+
 def options_annot_str(l):
 	return "(valid options: '{}')".format( "','".join(l) )
 
-class tool_cmd_base:
+class tool_cmd_base(MMGenObject):
 
 	need_proto = False
 	need_addrtype = False
diff --git a/mmgen/tool/file.py b/mmgen/tool/file.py
index 6d6eebca..e797f880 100755
--- a/mmgen/tool/file.py
+++ b/mmgen/tool/file.py
@@ -67,6 +67,7 @@ class tool_cmd(tool_cmd_base):
 		return self._file_chksum(mmgen_passwdfile,PasswordList)
 
 	async def txview(
+			self,
 			varargs_call_sig = { # hack to allow for multiple filenames
 				'args': (
 					'mmgen_tx_file(s)',
diff --git a/mmgen/wallet.py b/mmgen/wallet.py
index 0849129e..c254818e 100755
--- a/mmgen/wallet.py
+++ b/mmgen/wallet.py
@@ -206,7 +206,7 @@ class Wallet(MMGenObject,metaclass=WalletMeta):
 		return None
 
 	@classmethod
-	def ext_to_type(cls,ext,proto):
+	def ext_to_type(cls,ext,proto=None):
 		for c in cls.wallet_classes:
 			if ext == getattr(c,'ext',None):
 				return c