feat(trade): add a more precise trade amount function

src/atomic.dex.app.cpp

@@ -1192,4 +1192,16 @@ namespace atomic_dex
     }
 
     application::~application() noexcept { export_swaps_json(); }
+
+    QString
+    application::get_price_amount(QString base_amount, QString rel_amount)
+    {
+        t_float_50 base_amount_f(base_amount.toStdString());
+        t_float_50 rel_amount_f(rel_amount.toStdString());
+        auto final = (rel_amount_f / base_amount_f);
+
+        std::stringstream ss;
+        ss << std::fixed << std::setprecision(50) << std::move(final);
+        return QString::fromStdString(ss.str());
+    }
 } // namespace atomic_dex

src/atomic.dex.app.hpp

@@ -138,6 +138,7 @@ namespace atomic_dex
         Q_INVOKABLE bool        create(const QString& password, const QString& seed, const QString& wallet_name);
         Q_INVOKABLE bool        enable_coins(const QStringList& coins);
         Q_INVOKABLE QString     get_balance(const QString& coin);
+        Q_INVOKABLE QString     get_price_amount(QString base_amount, QString rel_amount);
         Q_INVOKABLE bool        place_buy_order(const QString& base, const QString& rel, const QString& price, const QString& volume);
         Q_INVOKABLE bool        place_sell_order(const QString& base, const QString& rel, const QString& price, const QString& volume);
         Q_INVOKABLE void        set_current_orderbook(const QString& base);

src/atomic.dex.mm2.api.cpp

@@ -348,7 +348,7 @@ namespace mm2::api
         j.at("zcredits").get_to(contents.zcredits);
 
         boost::trim_right_if(contents.price, boost::is_any_of("0"));
-        contents.price     = adjust_precision(contents.price);
+        contents.price     = contents.price;
         contents.maxvolume = adjust_precision(contents.maxvolume);
     }