Method GetChainArg

src/common/args.cpp:926–956

}

std::variant<ChainType, std::string> ArgsManager::GetChainArg() const
{
    auto get_net = [&](const std::string& arg) {
        LOCK(cs_args);
        common::SettingsValue value = common::GetSetting(m_settings, /* section= */ "", SettingName(arg),
            /* ignore_default_section_config= */ false,
            /*ignore_nonpersistent=*/false,
            /* get_chain_type= */ true);
        return value.isNull() ? false : value.isBool() ? value.get_bool() : InterpretBool(value.get_str());
    };

    const bool fRegTest = get_net("-regtest");
    const bool fSigNet  = get_net("-signet");
    const bool fTestNet = get_net("-testnet");
    const bool fTestNet4 = get_net("-testnet4");
    const auto chain_arg = GetArg("-chain");

    if ((int)chain_arg.has_value() + (int)fRegTest + (int)fSigNet + (int)fTestNet + (int)fTestNet4 > 1) {
        throw std::runtime_error("Invalid combination of -regtest, -signet, -testnet, -testnet4 and -chain. Can use at most one.");
    }
    if (chain_arg) {
        if (auto parsed = ChainTypeFromString(*chain_arg)) return *parsed;
        // Not a known string, so return original string
        return *chain_arg;
    }
    if (fRegTest) return ChainType::REGTEST;
    if (fSigNet) return ChainType::SIGNET;
    if (fTestNet) return ChainType::TESTNET;
    if (fTestNet4) return ChainType::TESTNET4;
    return ChainType::MAIN;
}

bool ArgsManager::UseDefaultSection(const std::string& arg) const
{