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feat: Read and write LedgerCache to file (#2761)

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Fixes #2413.
This commit is contained in:
Sergey Kuznetsov
2025-11-13 17:01:40 +00:00
committed by GitHub
parent c6308ce036
commit 346c9f9bdf
35 changed files with 2725 additions and 26 deletions
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58
src/data/impl/InputFile.cpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include "data/impl/InputFile.hpp"
#include <xrpl/basics/base_uint.h>
#include <cstddef>
#include <cstring>
#include <ios>
#include <iosfwd>
#include <string>
#include <utility>
namespace data::impl {
InputFile::InputFile(std::string const& path) : file_(path, std::ios::binary | std::ios::in)
{
}
bool
InputFile::isOpen() const
{
return file_.is_open();
}
bool
InputFile::readRaw(char* data, size_t size)
{
file_.read(data, size);
shasum_.update(data, size);
return not file_.fail();
}
ripple::uint256
InputFile::hash() const
{
auto sum = shasum_;
return std::move(sum).finalize();
}
} // namespace data::impl

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src/data/impl/InputFile.hpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#pragma once
#include "util/Shasum.hpp"
#include <xrpl/basics/base_uint.h>
#include <cstddef>
#include <cstring>
#include <fstream>
#include <iosfwd>
#include <string>
namespace data::impl {
class InputFile {
std::ifstream file_;
util::Sha256sum shasum_;
public:
InputFile(std::string const& path);
bool
isOpen() const;
template <typename T>
bool
read(T& t)
{
return readRaw(reinterpret_cast<char*>(&t), sizeof(T));
}
bool
readRaw(char* data, size_t size);
ripple::uint256
hash() const;
};
} // namespace data::impl

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src/data/impl/LedgerCacheFile.cpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include "data/impl/LedgerCacheFile.hpp"
#include "data/LedgerCache.hpp"
#include "data/Types.hpp"
#include <fmt/format.h>
#include <xrpl/basics/base_uint.h>
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstdint>
#include <exception>
#include <filesystem>
#include <string>
#include <utility>
namespace data::impl {
using Hash = ripple::uint256;
using Separator = std::array<char, 16>;
static constexpr Separator kSEPARATOR = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
namespace {
std::expected<std::pair<ripple::uint256, LedgerCache::CacheEntry>, std::string>
readCacheEntry(InputFile& file, size_t i)
{
ripple::uint256 key;
if (not file.readRaw(reinterpret_cast<char*>(key.data()), ripple::base_uint<256>::bytes)) {
return std::unexpected(fmt::format("Failed to read key at index {}", i));
}
uint32_t seq{};
if (not file.read(seq)) {
return std::unexpected(fmt::format("Failed to read sequence at index {}", i));
}
size_t blobSize{};
if (not file.read(blobSize)) {
return std::unexpected(fmt::format("Failed to read blob size at index {}", i));
}
Blob blob(blobSize);
if (not file.readRaw(reinterpret_cast<char*>(blob.data()), blobSize)) {
return std::unexpected(fmt::format("Failed to read blob data at index {}", i));
}
return std::make_pair(key, LedgerCache::CacheEntry{.seq = seq, .blob = std::move(blob)});
}
std::expected<void, std::string>
verifySeparator(Separator const& s)
{
if (not std::ranges::all_of(s, [](char c) { return c == 0; })) {
return std::unexpected{"Separator verification failed - data corruption detected"};
}
return {};
}
} // anonymous namespace
LedgerCacheFile::LedgerCacheFile(std::string path) : path_(std::move(path))
{
}
std::expected<void, std::string>
LedgerCacheFile::write(DataView dataView)
{
auto const newFilePath = fmt::format("{}.new", path_);
auto file = OutputFile{newFilePath};
if (not file.isOpen()) {
return std::unexpected{fmt::format("Couldn't open file: {}", newFilePath)};
}
Header const header{
.latestSeq = dataView.latestSeq, .mapSize = dataView.map.size(), .deletedSize = dataView.deleted.size()
};
file.write(header);
file.write(kSEPARATOR);
for (auto const& [k, v] : dataView.map) {
file.write(k.data(), decltype(k)::bytes);
file.write(v.seq);
file.write(v.blob.size());
file.writeRaw(reinterpret_cast<char const*>(v.blob.data()), v.blob.size());
}
file.write(kSEPARATOR);
for (auto const& [k, v] : dataView.deleted) {
file.write(k.data(), decltype(k)::bytes);
file.write(v.seq);
file.write(v.blob.size());
file.writeRaw(reinterpret_cast<char const*>(v.blob.data()), v.blob.size());
}
file.write(kSEPARATOR);
auto const hash = file.hash();
file.write(hash.data(), decltype(hash)::bytes);
try {
std::filesystem::rename(newFilePath, path_);
} catch (std::exception const& e) {
return std::unexpected{fmt::format("Error moving cache file from {} to {}: {}", newFilePath, path_, e.what())};
}
return {};
}
std::expected<LedgerCacheFile::Data, std::string>
LedgerCacheFile::read(uint32_t minLatestSequence)
{
try {
auto file = InputFile{path_};
if (not file.isOpen()) {
return std::unexpected{fmt::format("Couldn't open file: {}", path_)};
}
Data result;
Header header{};
if (not file.read(header)) {
return std::unexpected{"Error reading cache header"};
}
if (header.version != kVERSION) {
return std::unexpected{
fmt::format("Cache has wrong version: expected {} found {}", kVERSION, header.version)
};
}
if (header.latestSeq < minLatestSequence) {
return std::unexpected{fmt::format("Latest sequence ({}) in the cache file is too low.", header.latestSeq)};
}
result.latestSeq = header.latestSeq;
Separator separator{};
if (not file.readRaw(separator.data(), separator.size())) {
return std::unexpected{"Error reading cache header"};
}
if (auto verificationResult = verifySeparator(separator); not verificationResult.has_value()) {
return std::unexpected{std::move(verificationResult).error()};
}
for (size_t i = 0; i < header.mapSize; ++i) {
auto cacheEntryExpected = readCacheEntry(file, i);
if (not cacheEntryExpected.has_value()) {
return std::unexpected{std::move(cacheEntryExpected).error()};
}
// Using insert with hint here to decrease insert operation complexity to the amortized constant instead of
// logN
result.map.insert(result.map.end(), std::move(cacheEntryExpected).value());
}
if (not file.readRaw(separator.data(), separator.size())) {
return std::unexpected{"Error reading separator"};
}
if (auto verificationResult = verifySeparator(separator); not verificationResult.has_value()) {
return std::unexpected{std::move(verificationResult).error()};
}
for (size_t i = 0; i < header.deletedSize; ++i) {
auto cacheEntryExpected = readCacheEntry(file, i);
if (not cacheEntryExpected.has_value()) {
return std::unexpected{std::move(cacheEntryExpected).error()};
}
result.deleted.insert(result.deleted.end(), std::move(cacheEntryExpected).value());
}
if (not file.readRaw(separator.data(), separator.size())) {
return std::unexpected{"Error reading separator"};
}
if (auto verificationResult = verifySeparator(separator); not verificationResult.has_value()) {
return std::unexpected{std::move(verificationResult).error()};
}
auto const dataHash = file.hash();
ripple::uint256 hashFromFile{};
if (not file.readRaw(reinterpret_cast<char*>(hashFromFile.data()), decltype(hashFromFile)::bytes)) {
return std::unexpected{"Error reading hash"};
}
if (dataHash != hashFromFile) {
return std::unexpected{"Hash file corruption detected"};
}
return result;
} catch (std::exception const& e) {
return std::unexpected{fmt::format(" Error reading cache file: {}", e.what())};
} catch (...) {
return std::unexpected{fmt::format(" Error reading cache file")};
}
}
} // namespace data::impl

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src/data/impl/LedgerCacheFile.hpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#pragma once
#include "data/LedgerCache.hpp"
#include "data/impl/InputFile.hpp"
#include "data/impl/OutputFile.hpp"
#include <fmt/format.h>
#include <xrpl/basics/base_uint.h>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <string>
namespace data::impl {
class LedgerCacheFile {
public:
struct Header {
uint32_t version = kVERSION;
uint32_t latestSeq{};
uint64_t mapSize{};
uint64_t deletedSize{};
};
private:
static constexpr uint32_t kVERSION = 1;
std::string path_;
public:
template <typename T>
struct DataBase {
uint32_t latestSeq{0};
T map;
T deleted;
};
using DataView = DataBase<LedgerCache::CacheMap const&>;
using Data = DataBase<LedgerCache::CacheMap>;
LedgerCacheFile(std::string path);
std::expected<void, std::string>
write(DataView dataView);
std::expected<Data, std::string>
read(uint32_t minLatestSequence);
};
} // namespace data::impl

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src/data/impl/OutputFile.cpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include "data/impl/OutputFile.hpp"
#include <xrpl/basics/base_uint.h>
#include <cstddef>
#include <cstring>
#include <ios>
#include <string>
#include <utility>
namespace data::impl {
OutputFile::OutputFile(std::string const& path) : file_(path, std::ios::binary | std::ios::out)
{
}
bool
OutputFile::isOpen() const
{
return file_.is_open();
}
void
OutputFile::writeRaw(char const* data, size_t size)
{
writeToFile(data, size);
}
void
OutputFile::writeToFile(char const* data, size_t size)
{
file_.write(data, size);
shasum_.update(data, size);
}
ripple::uint256
OutputFile::hash() const
{
auto sum = shasum_;
return std::move(sum).finalize();
}
} // namespace data::impl

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src/data/impl/OutputFile.hpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2025, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#pragma once
#include "util/Shasum.hpp"
#include <xrpl/basics/base_uint.h>
#include <cstddef>
#include <cstring>
#include <fstream>
#include <string>
namespace data::impl {
class OutputFile {
std::ofstream file_;
util::Sha256sum shasum_;
public:
OutputFile(std::string const& path);
bool
isOpen() const;
template <typename T>
void
write(T&& data)
{
writeRaw(reinterpret_cast<char const*>(&data), sizeof(T));
}
template <typename T>
void
write(T const* data, size_t const size)
{
writeRaw(reinterpret_cast<char const*>(data), size);
}
void
writeRaw(char const* data, size_t size);
ripple::uint256
hash() const;
private:
void
writeToFile(char const* data, size_t size);
};
} // namespace data::impl