\ProvidesPackage{eurosym}
%%Hum I have one symbol only for euro!
\def\es@euro{\@print@u{X20AC}}
\newcommand{\let@euro}[1]{\let#1\es@euro}
\let@euro{\officialeuro}\let@euro{\geneuro}\let@euro{\geneuroarrow}%
\let@euro{\geneurowide}%
\let@euro{\euro}%
\newcommand{\es@left}[1]{\euro\,#1}
\newcommand{\es@right}[1]{#1\,\euro}
\let\EUR\es@left
%%Usefull options.
\DeclareOption{official}{}\DeclareOption{gen}{}\DeclareOption{genarrow}{}
\DeclareOption{genwide}{}
\DeclareOption{left}{\let\EUR\es@left}
\DeclareOption{right}{\let\EUR\es@right}
\ProcessOptions*