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diff --git a/archived/projt-launcher/launcher/net/FileSink.h b/archived/projt-launcher/launcher/net/FileSink.h
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+// SPDX-License-Identifier: GPL-3.0-only
+// SPDX-FileCopyrightText: 2026 Project Tick
+// SPDX-FileContributor: Project Tick Team
+/*
+ *  ProjT Launcher - Minecraft Launcher
+ *  Copyright (C) 2026 Project Tick
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * === Upstream License Block (Do Not Modify) ==============================
+ *
+ *
+ *
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2013-2021 MultiMC Contributors
+ *
+ *      Licensed under the Apache License, Version 2.0 (the "License");
+ *      you may not use this file except in compliance with the License.
+ *      You may obtain a copy of the License at
+ *
+ *          http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *      Unless required by applicable law or agreed to in writing, software
+ *      distributed under the License is distributed on an "AS IS" BASIS,
+ *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *      See the License for the specific language governing permissions and
+ *      limitations under the License.
+ *
+ * ======================================================================== */
+
+#pragma once
+
+#include "PSaveFile.h"
+#include "Sink.h"
+
+namespace Net
+{
+	class FileSink : public Sink
+	{
+	  public:
+		FileSink(QString filename) : m_filename(filename) {};
+		virtual ~FileSink() = default;
+
+	  public:
+		auto init(QNetworkRequest& request) -> Task::State override;
+		auto write(QByteArray& data) -> Task::State override;
+		auto abort() -> Task::State override;
+		auto finalize(QNetworkReply& reply) -> Task::State override;
+
+		auto hasLocalData() -> bool override;
+
+	  protected:
+		virtual auto initCache(QNetworkRequest&) -> Task::State;
+		virtual auto finalizeCache(QNetworkReply& reply) -> Task::State;
+
+	  protected:
+		QString m_filename;
+		bool m_wroteAnyData = false;
+		std::unique_ptr<PSaveFile> m_output_file;
+	};
+} // namespace Net