Initial Vexta Core v0.1.0 release
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25c454329d
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281
src/wallet/dump.cpp
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281
src/wallet/dump.cpp
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// Copyright (c) 2020 The DigiByte Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <wallet/dump.h>
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#include <util/translation.h>
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#include <wallet/wallet.h>
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static const std::string DUMP_MAGIC = "DIGIBYTE_CORE_WALLET_DUMP";
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uint32_t DUMP_VERSION = 1;
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bool DumpWallet(CWallet& wallet, bilingual_str& error)
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{
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// Get the dumpfile
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std::string dump_filename = gArgs.GetArg("-dumpfile", "");
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if (dump_filename.empty()) {
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error = _("No dump file provided. To use dump, -dumpfile=<filename> must be provided.");
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return false;
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}
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fs::path path = dump_filename;
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path = fs::absolute(path);
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if (fs::exists(path)) {
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error = strprintf(_("File %s already exists. If you are sure this is what you want, move it out of the way first."), path.string());
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return false;
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}
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fsbridge::ofstream dump_file;
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dump_file.open(path);
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if (dump_file.fail()) {
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error = strprintf(_("Unable to open %s for writing"), path.string());
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return false;
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}
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CHashWriter hasher(0, 0);
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WalletDatabase& db = wallet.GetDatabase();
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std::unique_ptr<DatabaseBatch> batch = db.MakeBatch();
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bool ret = true;
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if (!batch->StartCursor()) {
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error = _("Error: Couldn't create cursor into database");
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ret = false;
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}
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// Write out a magic string with version
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std::string line = strprintf("%s,%u\n", DUMP_MAGIC, DUMP_VERSION);
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dump_file.write(line.data(), line.size());
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hasher.write(line.data(), line.size());
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// Write out the file format
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line = strprintf("%s,%s\n", "format", db.Format());
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dump_file.write(line.data(), line.size());
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hasher.write(line.data(), line.size());
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if (ret) {
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// Read the records
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while (true) {
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CDataStream ss_key(SER_DISK, CLIENT_VERSION);
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CDataStream ss_value(SER_DISK, CLIENT_VERSION);
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bool complete;
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ret = batch->ReadAtCursor(ss_key, ss_value, complete);
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if (complete) {
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ret = true;
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break;
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} else if (!ret) {
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error = _("Error reading next record from wallet database");
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break;
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}
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std::string key_str = HexStr(ss_key);
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std::string value_str = HexStr(ss_value);
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line = strprintf("%s,%s\n", key_str, value_str);
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dump_file.write(line.data(), line.size());
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hasher.write(line.data(), line.size());
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}
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}
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batch->CloseCursor();
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batch.reset();
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// Close the wallet after we're done with it. The caller won't be doing this
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wallet.Close();
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if (ret) {
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// Write the hash
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tfm::format(dump_file, "checksum,%s\n", HexStr(hasher.GetHash()));
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dump_file.close();
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} else {
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// Remove the dumpfile on failure
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dump_file.close();
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fs::remove(path);
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}
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return ret;
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}
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// The standard wallet deleter function blocks on the validation interface
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// queue, which doesn't exist for the digibyte-wallet. Define our own
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// deleter here.
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static void WalletToolReleaseWallet(CWallet* wallet)
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{
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wallet->WalletLogPrintf("Releasing wallet\n");
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wallet->Close();
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delete wallet;
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}
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bool CreateFromDump(const std::string& name, const fs::path& wallet_path, bilingual_str& error, std::vector<bilingual_str>& warnings)
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{
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// Get the dumpfile
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std::string dump_filename = gArgs.GetArg("-dumpfile", "");
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if (dump_filename.empty()) {
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error = _("No dump file provided. To use createfromdump, -dumpfile=<filename> must be provided.");
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return false;
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}
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fs::path dump_path = dump_filename;
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dump_path = fs::absolute(dump_path);
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if (!fs::exists(dump_path)) {
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error = strprintf(_("Dump file %s does not exist."), dump_path.string());
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return false;
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}
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fsbridge::ifstream dump_file(dump_path);
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// Compute the checksum
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CHashWriter hasher(0, 0);
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uint256 checksum;
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// Check the magic and version
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std::string magic_key;
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std::getline(dump_file, magic_key, ',');
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std::string version_value;
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std::getline(dump_file, version_value, '\n');
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if (magic_key != DUMP_MAGIC) {
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error = strprintf(_("Error: Dumpfile identifier record is incorrect. Got \"%s\", expected \"%s\"."), magic_key, DUMP_MAGIC);
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dump_file.close();
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return false;
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}
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// Check the version number (value of first record)
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uint32_t ver;
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if (!ParseUInt32(version_value, &ver)) {
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error =strprintf(_("Error: Unable to parse version %u as a uint32_t"), version_value);
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dump_file.close();
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return false;
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}
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if (ver != DUMP_VERSION) {
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error = strprintf(_("Error: Dumpfile version is not supported. This version of digibyte-wallet only supports version 1 dumpfiles. Got dumpfile with version %s"), version_value);
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dump_file.close();
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return false;
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}
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std::string magic_hasher_line = strprintf("%s,%s\n", magic_key, version_value);
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hasher.write(magic_hasher_line.data(), magic_hasher_line.size());
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// Get the stored file format
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std::string format_key;
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std::getline(dump_file, format_key, ',');
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std::string format_value;
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std::getline(dump_file, format_value, '\n');
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if (format_key != "format") {
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error = strprintf(_("Error: Dumpfile format record is incorrect. Got \"%s\", expected \"format\"."), format_key);
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dump_file.close();
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return false;
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}
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// Get the data file format with format_value as the default
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std::string file_format = gArgs.GetArg("-format", format_value);
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if (file_format.empty()) {
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error = _("No wallet file format provided. To use createfromdump, -format=<format> must be provided.");
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return false;
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}
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DatabaseFormat data_format;
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if (file_format == "bdb") {
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data_format = DatabaseFormat::BERKELEY;
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} else if (file_format == "sqlite") {
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data_format = DatabaseFormat::SQLITE;
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} else {
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error = strprintf(_("Unknown wallet file format \"%s\" provided. Please provide one of \"bdb\" or \"sqlite\"."), file_format);
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return false;
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}
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if (file_format != format_value) {
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warnings.push_back(strprintf(_("Warning: Dumpfile wallet format \"%s\" does not match command line specified format \"%s\"."), format_value, file_format));
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}
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std::string format_hasher_line = strprintf("%s,%s\n", format_key, format_value);
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hasher.write(format_hasher_line.data(), format_hasher_line.size());
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DatabaseOptions options;
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DatabaseStatus status;
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options.require_create = true;
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options.require_format = data_format;
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std::unique_ptr<WalletDatabase> database = MakeDatabase(wallet_path, options, status, error);
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if (!database) return false;
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// dummy chain interface
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bool ret = true;
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std::shared_ptr<CWallet> wallet(new CWallet(nullptr /* chain */, name, std::move(database)), WalletToolReleaseWallet);
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{
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LOCK(wallet->cs_wallet);
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DBErrors load_wallet_ret = wallet->LoadWallet();
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if (load_wallet_ret != DBErrors::LOAD_OK) {
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error = strprintf(_("Error creating %s"), name);
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return false;
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}
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// Get the database handle
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WalletDatabase& db = wallet->GetDatabase();
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std::unique_ptr<DatabaseBatch> batch = db.MakeBatch();
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batch->TxnBegin();
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// Read the records from the dump file and write them to the database
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while (dump_file.good()) {
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std::string key;
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std::getline(dump_file, key, ',');
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std::string value;
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std::getline(dump_file, value, '\n');
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if (key == "checksum") {
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std::vector<unsigned char> parsed_checksum = ParseHex(value);
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std::copy(parsed_checksum.begin(), parsed_checksum.end(), checksum.begin());
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break;
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}
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std::string line = strprintf("%s,%s\n", key, value);
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hasher.write(line.data(), line.size());
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if (key.empty() || value.empty()) {
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continue;
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}
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if (!IsHex(key)) {
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error = strprintf(_("Error: Got key that was not hex: %s"), key);
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ret = false;
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break;
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}
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if (!IsHex(value)) {
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error = strprintf(_("Error: Got value that was not hex: %s"), value);
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ret = false;
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break;
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}
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std::vector<unsigned char> k = ParseHex(key);
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std::vector<unsigned char> v = ParseHex(value);
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CDataStream ss_key(k, SER_DISK, CLIENT_VERSION);
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CDataStream ss_value(v, SER_DISK, CLIENT_VERSION);
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if (!batch->Write(ss_key, ss_value)) {
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error = strprintf(_("Error: Unable to write record to new wallet"));
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ret = false;
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break;
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}
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}
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if (ret) {
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uint256 comp_checksum = hasher.GetHash();
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if (checksum.IsNull()) {
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error = _("Error: Missing checksum");
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ret = false;
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} else if (checksum != comp_checksum) {
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error = strprintf(_("Error: Dumpfile checksum does not match. Computed %s, expected %s"), HexStr(comp_checksum), HexStr(checksum));
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ret = false;
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}
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}
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if (ret) {
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batch->TxnCommit();
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} else {
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batch->TxnAbort();
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}
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batch.reset();
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dump_file.close();
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}
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wallet.reset(); // The pointer deleter will close the wallet for us.
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// Remove the wallet dir if we have a failure
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if (!ret) {
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fs::remove_all(wallet_path);
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}
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return ret;
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}
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