bitcoin-dumpwallet 0.1.16-alpha.0

persist wallet to and from disk
Documentation 
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crate::ix!();

//-------------------------------------------[.cpp/bitcoin/src/wallet/dump.h]
//-------------------------------------------[.cpp/bitcoin/src/wallet/dump.cpp]

pub const DUMP_MAGIC: &'static str = "BITCOIN_CORE_WALLET_DUMP";

lazy_static!{
    /*
    uint32_t DUMP_VERSION = 1;
    */
}

pub fn dump_wallet<'a>(
    wallet: &'a mut Wallet,
    error:  &mut BilingualStr) -> bool {
    
    todo!();
        /*
            // Get the dumpfile
        std::string dump_filename = gArgs.GetArg("-dumpfile", "");
        if (dump_filename.empty()) {
            error = _("No dump file provided. To use dump, -dumpfile=<filename> must be provided.");
            return false;
        }

        fs::path path = fs::PathFromString(dump_filename);
        path = fs::absolute(path);
        if (fs::exists(path)) {
            error = strprintf(_("File %s already exists. If you are sure this is what you want, move it out of the way first."), fs::PathToString(path));
            return false;
        }
        fsbridge::ofstream dump_file;
        dump_file.open(path);
        if (dump_file.fail()) {
            error = strprintf(_("Unable to open %s for writing"), fs::PathToString(path));
            return false;
        }

        CHashWriter hasher(0, 0);

        WalletDatabase& db = wallet.GetDatabase();
        std::unique_ptr<DatabaseBatch> batch = db.MakeBatch();

        bool ret = true;
        if (!batch->StartCursor()) {
            error = _("Error: Couldn't create cursor into database");
            ret = false;
        }

        // Write out a magic string with version
        std::string line = strprintf("%s,%u\n", DUMP_MAGIC, DUMP_VERSION);
        dump_file.write(line.data(), line.size());
        hasher.write(line.data(), line.size());

        // Write out the file format
        line = strprintf("%s,%s\n", "format", db.Format());
        dump_file.write(line.data(), line.size());
        hasher.write(line.data(), line.size());

        if (ret) {

            // Read the records
            while (true) {
                DataStream ss_key(SER_DISK, CLIENT_VERSION);
                DataStream ss_value(SER_DISK, CLIENT_VERSION);
                bool complete;
                ret = batch->ReadAtCursor(ss_key, ss_value, complete);
                if (complete) {
                    ret = true;
                    break;
                } else if (!ret) {
                    error = _("Error reading next record from wallet database");
                    break;
                }
                std::string key_str = HexStr(ss_key);
                std::string value_str = HexStr(ss_value);
                line = strprintf("%s,%s\n", key_str, value_str);
                dump_file.write(line.data(), line.size());
                hasher.write(line.data(), line.size());
            }
        }

        batch->CloseCursor();
        batch.reset();

        // Close the wallet after we're done with it. The caller won't be doing this
        wallet.Close();

        if (ret) {
            // Write the hash
            tfm::format(dump_file, "checksum,%s\n", HexStr(hasher.GetHash()));
            dump_file.close();
        } else {
            // Remove the dumpfile on failure
            dump_file.close();
            fs::remove(path);
        }

        return ret;
        */
}