-module(glethers@signer@signing_key).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([from_string/1, to_bit_array/1]).
-export_type([private_key/0, private_key_error/0]).

-opaque private_key() :: {private_key, bitstring()}.

-type private_key_error() :: wrong_length | failed_base16_decode.

-spec from_string(binary()) -> {ok, private_key()} |
    {error, private_key_error()}.
from_string(Private_key) ->
    Private_key@1 = case Private_key of
        <<"0x"/utf8, Value/binary>> ->
            Value;

        Other ->
            Other
    end,
    gleam@result:'try'(
        begin
            _pipe = Private_key@1,
            _pipe@1 = gleam_stdlib:base16_decode(_pipe),
            gleam@result:map_error(_pipe@1, fun(_) -> failed_base16_decode end)
        end,
        fun(Private_key@2) -> case erlang:byte_size(Private_key@2) of
                32 ->
                    {ok, {private_key, Private_key@2}};

                _ ->
                    {error, wrong_length}
            end end
    ).

-spec to_bit_array(private_key()) -> bitstring().
to_bit_array(Private_key) ->
    {private_key, Private_key@1} = Private_key,
    Private_key@1.