优化保存已处理交易哈希的逻辑，合并新哈希并更新总记录数

main.py

@@ -136,7 +136,7 @@ def update_json_file(new_data):
             "成功更新%s，合并%d条记录，总计%d条记录",
             JSON_FILE,
             len(processed_data),
-            len(existing_data)
+            len(existing_data),
         )
     except (FileNotFoundError, json.JSONDecodeError, IOError) as e:
         LOGGER.error("更新JSON文件时发生错误: %s，跳过本次更新", e)
@@ -175,9 +175,26 @@ def load_processed_hashes():
 def save_processed_hashes():
     """Save processed transaction hashes to file."""
     try:
+        # 读取现有数据
+        try:
+            with open(HASH_FILE, "r", encoding="utf-8") as file:
+                existing_data = json.load(file)
+        except (FileNotFoundError, json.JSONDecodeError):
+            existing_data = []
+
+        # 合并新哈希
+        updated_data = list(set(existing_data) | SEEN_TXHASHES)
+
+        # 写回文件
         with open(HASH_FILE, "w", encoding="utf-8") as file:
-            json.dump(list(SEEN_TXHASHES), file, indent=4, ensure_ascii=False)
-        LOGGER.info("成功保存已处理交易哈希到%s", HASH_FILE)
+            json.dump(updated_data, file, indent=4, ensure_ascii=False)
+
+        LOGGER.info(
+            "成功更新%s，新增%d条哈希，总计%d条记录",
+            HASH_FILE,
+            len(SEEN_TXHASHES - set(existing_data)),
+            len(updated_data),
+        )
     except IOError as e:
         LOGGER.error("保存已处理交易哈希时发生错误: %s", e)