Repository: dogecoin/dogecoin
File: src/qt/optionsmodel.cpp (C++)

Code before:
    // Display
    if (!settings.contains("nDisplayUnit"))
        settings.setValue("nDisplayUnit", BitcoinUnits::BTC);
    nDisplayUnit = settings.value("nDisplayUnit").toInt();

    if (!settings.contains("strThirdPartyTxUrls"))
        settings.setValue("strThirdPartyTxUrls", "https://dogechain.info/tx/%s|https://chain.so/tx/DOGE/%s");
    strThirdPartyTxUrls = settings.value("strThirdPartyTxUrls", "").toString();

    if (!settings.contains("fCoinControlFeatures"))
        settings.setValue("fCoinControlFeatures", false);
    fCoinControlFeatures = settings.value("fCoinControlFeatures", false).toBool();

    // These are shared with the core or have a command-line parameter
    // and we want command-line parameters to overwrite the GUI settings.
    //
    // If setting doesn't exist create it with defaults.
    //
    // If SoftSetArg() or SoftSetBoolArg() return false we were overridden
    // by command-line and show this in the UI.

    // Main
    if (!settings.contains("bPrune"))
        settings.setValue("bPrune", false);
    if (!settings.contains("nPruneSize"))
        settings.setValue("nPruneSize", 2);
    // Convert prune size to MB:
    const uint64_t nPruneSizeMB = settings.value("nPruneSize").toInt() * 1000;
    if (!SoftSetArg("-prune", settings.value("bPrune").toBool() ? std::to_string(nPruneSizeMB) : "0")) {
      addOverriddenOption("-prune");
    }

    if (!settings.contains("nDatabaseCache"))
        settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
    if (!SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
        addOverriddenOption("-dbcache");

    if (!settings.contains("nThreadsScriptVerif"))
        settings.setValue("nThreadsScriptVerif", DEFAULT_SCRIPTCHECK_THREADS);
    if (!SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
        addOverriddenOption("-par");

    if (!settings.contains("strDataDir"))
        settings.setValue("strDataDir", Intro::getDefaultDataDirectory());

    // Wallet
#ifdef ENABLE_WALLET
    if (!settings.contains("bSpendZeroConfChange"))
        settings.setValue("bSpendZeroConfChange", true);
    if (!SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
        addOverriddenOption("-spendzeroconfchange");

Review comment (suggestion):
per the other note, if the minimum value `nMinDiskSpace` is moved to `optionsmodel.h`, we can then just use that here too. 

Code after:

    // Display
    if (!settings.contains("nDisplayUnit"))
        settings.setValue("nDisplayUnit", BitcoinUnits::BTC);
    nDisplayUnit = settings.value("nDisplayUnit").toInt();

    if (!settings.contains("strThirdPartyTxUrls"))
        settings.setValue("strThirdPartyTxUrls", "https://dogechain.info/tx/%s|https://chain.so/tx/DOGE/%s");
    strThirdPartyTxUrls = settings.value("strThirdPartyTxUrls", "").toString();

    if (!settings.contains("fCoinControlFeatures"))
        settings.setValue("fCoinControlFeatures", false);
    fCoinControlFeatures = settings.value("fCoinControlFeatures", false).toBool();

    // These are shared with the core or have a command-line parameter
    // and we want command-line parameters to overwrite the GUI settings.
    //
    // If setting doesn't exist create it with defaults.
    //
    // If SoftSetArg() or SoftSetBoolArg() return false we were overridden
    // by command-line and show this in the UI.

    // Main
    if (!settings.contains("bPrune"))
        settings.setValue("bPrune", false);
    if (!settings.contains("nPruneSize"))
        settings.setValue("nPruneSize", DEFAULT_PRUNE_TARGET_GB);
    // Convert prune size to MiB:
    const uint64_t nPruneSizeMiB = PruneGBtoMiB(settings.value("nPruneSize").toInt());
    if (!SoftSetArg("-prune", settings.value("bPrune").toBool() ? std::to_string(nPruneSizeMiB) : "0")) {
      addOverriddenOption("-prune");
    }

    if (!settings.contains("nDatabaseCache"))
        settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
    if (!SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
        addOverriddenOption("-dbcache");

    if (!settings.contains("nThreadsScriptVerif"))
        settings.setValue("nThreadsScriptVerif", DEFAULT_SCRIPTCHECK_THREADS);
    if (!SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
        addOverriddenOption("-par");

    if (!settings.contains("strDataDir"))
        settings.setValue("strDataDir", Intro::getDefaultDataDirectory());

    // Wallet
#ifdef ENABLE_WALLET
    if (!settings.contains("bSpendZeroConfChange"))
        settings.setValue("bSpendZeroConfChange", true);
    if (!SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))