From 3cf9dfebb2392e72f20ab28a4e2b7d99ae5ccbfa Mon Sep 17 00:00:00 2001
From: The MMGen Project <mmgen@tuta.io>
Date: Fri, 23 Oct 2026 17:01:32 +0000
Subject: [PATCH] tx.file, xmrwallet.file: encapsulated compat data changes

---
 mmgen/tx/base.py                 |  1 +
 mmgen/tx/file.py                 |  4 ++--
 mmgen/xmrwallet/file/__init__.py | 11 +++++------
 mmgen/xmrwallet/file/outputs.py  |  2 +-
 mmgen/xmrwallet/file/tx.py       |  2 +-
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/mmgen/tx/base.py b/mmgen/tx/base.py
index 70cbaf50..bb87d432 100644
--- a/mmgen/tx/base.py
+++ b/mmgen/tx/base.py
@@ -83,6 +83,7 @@ class Base(MMGenObject):
 	is_refreq    = False
 	is_memoless  = False
 	is_compat    = False
+	compat_data  = None
 	has_comment  = True
 	swap_attrs = {
 		'swap_proto': None,
diff --git a/mmgen/tx/file.py b/mmgen/tx/file.py
index b26d251a..c44eeb99 100644
--- a/mmgen/tx/file.py
+++ b/mmgen/tx/file.py
@@ -283,13 +283,13 @@ class MMGenTxFile(MMGenObject):
 			data = txfile_json_dumps({
 					'coin_id': coin_id,
 					'version': tx.txfile_version
-				} | {
+				} | (tx.compat_data or ({
 					k: getattr(tx, k) for k in self.attrs
 				} | {
 					'inputs':  [e._asdict() for e in tx.inputs],
 					'outputs': [{k: v for k,v in e._asdict().items()
 						if not (type(v) is bool and v is False)} for e in tx.outputs]
-				} | {
+				})) | {
 					k: getattr(tx, k) for k in self.extra_attrs if getattr(tx, k, None)
 				} | ({
 					k: getattr(tx, k) for k in tx.swap_attrs if getattr(tx, k, None)
diff --git a/mmgen/xmrwallet/file/__init__.py b/mmgen/xmrwallet/file/__init__.py
index 7f8eb2bf..1f5d803b 100644
--- a/mmgen/xmrwallet/file/__init__.py
+++ b/mmgen/xmrwallet/file/__init__.py
@@ -40,18 +40,17 @@ class MoneroMMGenFile:
 				b = d_wrap[k]
 				assert a == b, f'{k} mismatch: {a} != {b}'
 
+	def make_wrapped_json_data(self, in_data):
+		return json.dumps(self.make_wrapped_data(in_data), cls=json_encoder, indent=2)
+
 	def make_wrapped_data(self, in_data):
-		out = {
+		return {self.data_label: {
 			'base_chksum': self.base_chksum,
 			'full_chksum': self.full_chksum,
 			'data': in_data,
 		} if self.full_chksum else {
 			'base_chksum': self.base_chksum,
-			'data': in_data}
-		return json.dumps(
-			{self.data_label: out},
-			cls = json_encoder,
-			indent = 2)
+			'data': in_data}}
 
 	def extract_data_from_file(self, cfg, fn):
 		return json.loads(
diff --git a/mmgen/xmrwallet/file/outputs.py b/mmgen/xmrwallet/file/outputs.py
index 637f719f..8ed5cf4f 100644
--- a/mmgen/xmrwallet/file/outputs.py
+++ b/mmgen/xmrwallet/file/outputs.py
@@ -47,7 +47,7 @@ class MoneroWalletOutputsFile:
 			write_data_to_file(
 				cfg               = self.cfg,
 				outfile           = str(self.get_outfile(self.cfg, self.wallet_fn)) + add_suf,
-				data              = self.make_wrapped_data(self.data._asdict()),
+				data              = self.make_wrapped_json_data(self.data._asdict()),
 				desc              = self.desc,
 				ask_overwrite     = False,
 				quiet             = quiet,
diff --git a/mmgen/xmrwallet/file/tx.py b/mmgen/xmrwallet/file/tx.py
index d7688192..7e20d03a 100644
--- a/mmgen/xmrwallet/file/tx.py
+++ b/mmgen/xmrwallet/file/tx.py
@@ -170,7 +170,7 @@ class MoneroMMGenTX:
 			write_data_to_file(
 				cfg                   = self.cfg,
 				outfile               = str(fn),
-				data                  = self.make_wrapped_data(dict_data),
+				data                  = self.make_wrapped_json_data(dict_data),
 				desc                  = self.desc,
 				ask_write             = ask_write,
 				ask_write_default_yes = not ask_write,