Need help decompiling .beam file

The BEAM includes tooling to do part of this, :beam_disasm.

{:ok, {{_, 200, _}, headers, body_charlist}} = :httpc.request('https://github.com/granados12/decompile/blob/main/holiday_role_data4.beam?raw=true')

body = :binary.list_to_bin(body_charlist)

:beam_disasm.file(body)

This produces output like (you’ll want to make sure to use IO.inspect(limit: :infinity) to prevent cutting off terms):

{:beam_file, :holiday_role_data,
 [
   {:all_son, 0, 12},
   {:all_son2, 0, 14},
   {:bid_son, 1, 21},
   {:get, 1, 853},
   {:get_const, 1, 1259},
   {:get_open, 1, 59},
   {:list_open_son, 1, 4},
   {:list_open_total, 0, 2},
   {:list_son, 1, 16},
   {:list_total, 0, 10},
   {:main_ico, 1, 1257},
   {:module_info, 0, 1265},
   {:module_info, 1, 1267},
   {:open_ico, 1, 1255}
 ],
 [
   lager_records: [
     condition: [:label, :op, :val, :msg],
     holiday: [:camp_id, :total_id, :bid, :tbid, :cli_type, :cli_type_name, :start_time, :end_time,
      :condition, :type, :title, :title2, :main_ico, :ico, :type_ico, :top_banner, :rule_str,
      :time_str, :bottom_alert, :sort_val, :reward_title, :aim_title, :reward, :item_effect,
      :mail_subject, :mail_content, :cli_reward, :panel_type, :open_day, :open_day_min,
      :open_day_max, :merge_day, :process_show_reward, :platform_id, :platform_exclude_id,
      :hide_srv_ids, :channel_ban],
     holiday_total: [:id, :name, :icon_id, :start_time, :end_time, :status, :open_day, :merge_day,
      :is_show, :type]
   ],
   vsn: [320956466309601905319104183717896391347]
 ],
 [
   options: [
     :error_summary,
     {:hipe, [:o3]},
     :debug_info,
     {:i, 'inc'},
     {:outdir, 'ebin'},
     {:parse_transform, :lager_transform},
     {:d, :disable_auth},
     {:d, :enable_gm_cmd},
     {:d, :debug},
     {:d, :data_debug}
   ],
   version: '7.0.4',
   source: '/elora/server/src/data/holiday_role_data.erl'
 ],
 [
   {:function, :list_open_total, 0, 2,
    [
      {:label, 1},
      {:line, 1},
      {:func_info, {:atom, :holiday_role_data}, {:atom, :list_open_total}, 0},
      {:label, 2},
      {:allocate_zero, 1, 0},
      {:move, {:literal, "HĐ Gộp SV"}, {:x, 0}},
      {:line, 2},
      {:call_ext, 1, {:extfunc, :lang, :get, 1}},
      {:move, {:x, 0}, {:y, 0}},
      {:move, {:literal, "HĐ Mở SV"}, {:x, 0}},
      {:line, 3},
      {:call_ext, 1, {:extfunc, :lang, :get, 1}},
      {:test_heap, 28, 1},
      {:put_tuple, 11, {:x, 1}},
      {:put, {:atom, :holiday_total}},
      {:put, {:integer, 103}},
      {:put, {:x, 0}},
      {:put, {:integer, 0}},
      {:put, {:literal, {:open_day, 1}}},
      {:put, {:literal, {:open_day, 56, 86399}}},
      {:put, {:integer, 1}},
      {:put, {:integer, 0}},
      {:put, {:integer, 0}},
      {:put, {:integer, 1}},
      {:put, {:integer, 1}},
      {:put_list, {:x, 1}, nil, {:x, 1}},
      {:put_tuple, 11, {:x, 2}},
      {:put, {:atom, :holiday_total}},
      {:put, {:integer, 104}},
      {:put, {:y, 0}},
      {:put, {:integer, 0}},
      {:put, {:literal, {:merge_day, 1}}},

As for editing this BEAM file, that’s not something that’s normally done - BEAM files are written by the compiler so if you want to change them you change the Erlang etc code and recompile. According to the metadata in that file, that’s in src/data/holiday_role_data.erl.

Hello, thank you very much for answering, I really didn’t know how to do it, in the same way there are several files, but with this example I will see if I can decompile them, the only thing I want with the files is to decompile them, edit the texts that are in the Vietnamese language, translate them into English and ready to compile them again, can I talk to you in private for a moment?

I know nothing about Beam file format, but maybe you can get some inspiration in how to approach the problem inspect this repo GitHub - michalmuskala/decompile · GitHub

This solution helped me a lot, thanks man, now how do I save it in a file to be able to edit it, or convert it into a .txt or .erl, edit it and compile it again, as I say, it is to only edit the texts, translate them into English and return them to compile

Hola erlic122, bienvenido

Have you tried asking in the Erlang forums?

Hello, thank you very much for the welcome, if I made an account 3 days ago but it has not been validated and I cannot ask a question without being registered, then I have to use this forum since they have not verified my account registration

I have been able to decompile it in this way but I have not been able to recompile it in .BEAM file any other advice?

Given your source file is generated from decompilation, you can open an erlang shell (erl command) and compile it by hand:

erl
Erlang/OTP 24 [erts-12.2] [source] [64-bit] [smp:16:16] [ds:16:16:10] [async-threads:1] [jit]

Eshell V12.2  (abort with ^G)
1> c("holiday_role_data.erl").
{ok,holiday_role_data}

I get an error, it doesn’t seem to decompile correctly, is there any other way to decompile the .beam files or convert them from beam to .erl

PM me your email address and I will send you the .erl file. It is too large for tools like pastebin.