><li><code>Bech = <a href="/home/steven/devel/nostr/apps/erts/doc/erlang.html#type-list">list()</a></code></li><li><code>Opts = [Option, ...]</code></li><li><code>Option = {converter, Converter}</code></li><li><code>Converter = <a href="/home/steven/devel/nostr/apps/erts/doc/erlang.html#type-function">function()</a> | {base, Base}</code></li><li><code>Base = <a href="/home/steven/devel/nostr/apps/erts/doc/erlang.html#type-pos_integer">pos_integer()</a></code></li><li><code>Return = {ok, <a href="/home/steve