From 5896d2c9392784602107470498086e764c1e621e Mon Sep 17 00:00:00 2001
From: AntsyLich <59261191+AntsyLich@users.noreply.github.com>
Date: Tue, 16 Jun 2026 03:17:20 +0600
Subject: [PATCH] Fix compatibility with older backups

Fixes #3413
---
 .../eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt    | 3 ++-
 .../java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt | 3 ++-
 .../src/main/kotlin/mihon/core/common/extensions/JsonObject.kt | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt
index c74dbc6e4..09745f11f 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt
@@ -4,6 +4,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.protobuf.ProtoNumber
 import mihon.core.common.extensions.EMPTY
+import mihon.core.common.extensions.JsonObjectEmptyBytes
 import tachiyomi.data.MemoColumnAdapter
 import tachiyomi.domain.chapter.model.Chapter
 
@@ -25,7 +26,7 @@ class BackupChapter(
     @ProtoNumber(10) var sourceOrder: Long = 0,
     @ProtoNumber(11) var lastModifiedAt: Long = 0,
     @ProtoNumber(12) var version: Long = 0,
-    @ProtoNumber(13) var memo: ByteArray = byteArrayOf(),
+    @ProtoNumber(13) var memo: ByteArray = JsonObjectEmptyBytes,
 ) {
     fun toChapterImpl(): Chapter {
         return Chapter.create().copy(
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
index 20012fc39..6736eb287 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
@@ -5,6 +5,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.protobuf.ProtoNumber
 import mihon.core.common.extensions.EMPTY
+import mihon.core.common.extensions.JsonObjectEmptyBytes
 import tachiyomi.data.MemoColumnAdapter
 import tachiyomi.domain.manga.model.Manga
 
@@ -46,7 +47,7 @@ class BackupManga(
     @ProtoNumber(109) var version: Long = 0,
     @ProtoNumber(110) var notes: String = "",
     @ProtoNumber(111) var initialized: Boolean = false,
-    @ProtoNumber(112) var memo: ByteArray = byteArrayOf(),
+    @ProtoNumber(112) var memo: ByteArray = JsonObjectEmptyBytes,
 ) {
     fun getMangaImpl(): Manga {
         return Manga.create().copy(
diff --git a/core/common/src/main/kotlin/mihon/core/common/extensions/JsonObject.kt b/core/common/src/main/kotlin/mihon/core/common/extensions/JsonObject.kt
index 8ad4e6dbb..d7d17b164 100644
--- a/core/common/src/main/kotlin/mihon/core/common/extensions/JsonObject.kt
+++ b/core/common/src/main/kotlin/mihon/core/common/extensions/JsonObject.kt
@@ -4,5 +4,7 @@ import kotlinx.serialization.json.JsonObject
 
 val JsonObjectEmpty = JsonObject(emptyMap())
 
+val JsonObjectEmptyBytes = byteArrayOf(0x7B, 0x7D)
+
 val JsonObject.Companion.EMPTY: JsonObject
     inline get() = JsonObjectEmpty