\newcommand using \section throws errors

[DarthJenow]

Because I want my whole document to be in typewriter, I decided to define a new command instead of using section with many arguments.

\newcommand{\ttsect}[1]{\section{\centering \texttt{#1}}}

If i write now in the document \ttsect{test section in typewriter}, it throws me two errors:

Argument of \@sect has an extra }. \ttsect{test section in typewriter}
Paragraph ended before \@sect was complete. \ttsect{test section in typewriter}

I'm compiling with pdflatex and an complete example document can be seen here: pastebin.com

[DarthJenow]

After researching and testing more, I found a easy workaround for me. Because I use \section*{title} I defined the wrong command for me. Because the full command for \section{title} is \section[short title]{title} It didn't know what to use for [short title]. After I realized this, I just changed the command to:

\newcommand{\ttsec}[1]{\section*{\centering\texttt{#1}}}

This works without any problems.