qt.trading.page.cpp

void
    trading_page::determine_fees() noexcept
    {
        const auto* market_pair = get_market_pairs_mdl();
        const auto& mm2         = this->m_system_manager.get_system<mm2_service>();

        //! Send
        const auto base = market_pair->get_base_selected_coin();

        //! Receive
        const auto rel = market_pair->get_rel_selected_coin();

        //! (send) BCH <-> ETH (receive)
        bool is_max = false;

        //! If We are in sell mode check if it's max
        if (m_market_mode == MarketMode::Sell)
        {
            if (m_volume == m_max_volume) //! It's capped, means max_trade_vol means all the fees are included
            {
                is_max = true;
            }
        }

        //! Trading fees

        //! 1 / 777 * total_amount (if max is true, total_amount will be the balance);
        const t_float_50 trade_fee_f = mm2.get_trading_fees(base.toStdString(), m_total_amount.toStdString(), is_max);

        //! Transaction Fees
        const auto answer   = mm2.get_transaction_fees(base.toStdString());
        t_float_50 tx_fee_f = 0;

        //! If answer is valid
        if (!answer.amount.empty())
        {
            tx_fee_f = t_float_50(answer.amount) * 2;
        }

        t_float_50        specific_fees(0);
        const std::string extra_fees_ticker = mm2.apply_specific_fees(rel.toStdString(), specific_fees);

        //! Write output
        QVariantMap fees;

        fees["trading_fee"] = QString::fromStdString(utils::format_float(trade_fee_f));

        //! for BCH <-> ETH, trading_fee_ticker will be BCH
        fees["trading_fee_ticker"] = base;

        //! Base transaction fees
        fees["base_transaction_fees"]        = QString::fromStdString(utils::format_float(tx_fee_f));
        fees["base_transaction_fees_ticker"] = QString::fromStdString(answer.coin);

        if (not extra_fees_ticker.empty())
        {
            fees["rel_transaction_fees"]        = QString::fromStdString(utils::format_float(specific_fees));
            fees["rel_transaction_fees_ticker"] = QString::fromStdString(extra_fees_ticker);
        }

        this->set_fees(fees);
    }