mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
61 lines
2 KiB
C++
61 lines
2 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "LastBlockStorage.h"
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#include "tonlib/utils.h"
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#include "td/utils/as.h"
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#include "td/utils/filesystem.h"
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#include "td/utils/port/path.h"
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#include "td/utils/tl_helpers.h"
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namespace tonlib {
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void LastBlockStorage::set_key_value(std::shared_ptr<KeyValue> kv) {
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kv_ = std::move(kv);
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}
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namespace {
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std::string get_file_name(td::Slice name) {
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return td::buffer_to_hex(name) + ".blkstate";
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}
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} // namespace
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td::Result<LastBlockState> LastBlockStorage::get_state(td::Slice name) {
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TRY_RESULT(data, kv_->get(get_file_name(name)));
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if (data.size() < 8) {
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return td::Status::Error("too short");
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}
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if (td::as<td::uint64>(data.data()) != td::crc64(td::Slice(data).substr(8))) {
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return td::Status::Error("crc64 mismatch");
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}
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LastBlockState res;
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TRY_STATUS(td::unserialize(res, td::Slice(data).substr(8)));
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return res;
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}
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void LastBlockStorage::save_state(td::Slice name, LastBlockState state) {
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VLOG(last_block) << "Save to cache: " << state;
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auto x = td::serialize(state);
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std::string y(x.size() + 8, 0);
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td::MutableSlice(y).substr(8).copy_from(x);
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td::as<td::uint64>(td::MutableSlice(y).data()) = td::crc64(x);
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kv_->set(get_file_name(name), y);
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}
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} // namespace tonlib
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