1 files changed, 57 insertions, 0 deletions
diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
new file mode 100644
index 0000000000..a7bebbc3e4
--- /dev/null
+++ b/src/qt/bitcoinunits.h
@@ -0,0 +1,57 @@
+#ifndef BITCOINUNITS_H
+#define BITCOINUNITS_H
+
+#include <QString>
+#include <QAbstractListModel>
+
+// Bitcoin unit definitions, encapsulates parsing and formatting
+// and serves as list model for dropdown selection boxes.
+class BitcoinUnits: public QAbstractListModel
+{
+public:
+    explicit BitcoinUnits(QObject *parent);
+
+    enum Unit
+    {
+        // Source: https://en.bitcoin.it/wiki/Units
+        // Please add only sensible ones
+        BTC,
+        mBTC,
+        uBTC
+    };
+
+    /// Static API
+    // Get list of units, for dropdown box
+    static QList<Unit> availableUnits();
+    // Is unit ID valid?
+    static bool valid(int unit);
+    // Short name
+    static QString name(int unit);
+    // Longer description
+    static QString description(int unit);
+    // Number of satoshis / unit
+    static qint64 factor(int unit);
+    // Number of amount digits (to represent max number of coins)
+    static int amountDigits(int unit);
+    // Number of decimals left
+    static int decimals(int unit);
+    // Format as string
+    static QString format(int unit, qint64 amount, bool plussign=false);
+    // Format as string (with unit)
+    static QString formatWithUnit(int unit, qint64 amount, bool plussign=false);
+    // Parse string to coin amount
+    static bool parse(int unit, const QString &value, qint64 *val_out);
+
+    /// AbstractListModel implementation
+    enum {
+        // Unit identifier
+        UnitRole = Qt::UserRole
+    } RoleIndex;
+    int rowCount(const QModelIndex &parent) const;
+    QVariant data(const QModelIndex &index, int role) const;
+private:
+    QList<BitcoinUnits::Unit> unitlist;
+};
+typedef BitcoinUnits::Unit BitcoinUnit;
+
+#endif // BITCOINUNITS_H