How to edit .bst file to use texttt typewriter font?

I’m using the scrreprt document class and BibTeX, Version 0.99d with apsrev4-2 for by bibliography. I’d like to modify my local .bst file such that the eprint field is printed with the texttt typewriter font. I assume that I have to modify the FUNCTION {format.eprint} function, but I have no idea how.

For reference, this is how the relevant part in my .bst file looks like:

FUNCTION {format.eprint}
{
  eprint duplicate$ empty$
  control.eprint #0 <
  or
    { pop$ "" }
    {
      duplicate$
      ""
        archive duplicate$ empty$ { pop$ archiv.base } 'skip$ if$ *
        "/" *
        swap$ *
        "{" swap$ * "}" *
      swap$
      ""
        archivePrefix duplicate$ empty$ { pop$ "" } { ":" * } if$ *
        swap$ *
        primaryClass  duplicate$ empty$ { pop$ "" } { " [" swap$ * "]" * } if$ *
        "{" swap$ * "}" *
      *
      eprint.command swap$ *
    }
  if$
}

FUNCTION {format.eprint}
{
  eprint duplicate$ empty$
  control.eprint #0 <
  or
    { pop$ "" }
    {
      duplicate$
      ""
        archive duplicate$ empty$ { pop$ archiv.base } 'skip$ if$ *
        "/" *
        swap$ *
        "{" swap$ * "}" *
      swap$
      "ttfamily " %%% INSERT HERE 
        archivePrefix duplicate$ empty$ { pop$ "" } { ":" * } if$ *
        swap$ *
        primaryClass  duplicate$ empty$ { pop$ "" } { " [" swap$ * "]" * } if$ *
        "{" swap$ * "}" *
      *
      eprint.command swap$ *
    }
  if$
}