From a96bfc7da12658a4daa81b5437bd7ef2255c0a96 Mon Sep 17 00:00:00 2001
From: anlicheng <244108715@qq.com>
Date: Wed, 17 Sep 2025 17:48:03 +0800
Subject: [PATCH] fix codec

---
 apps/efka/src/efka_codec.erl | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/apps/efka/src/efka_codec.erl b/apps/efka/src/efka_codec.erl
index 0e0760d..71787cd 100644
--- a/apps/efka/src/efka_codec.erl
+++ b/apps/efka/src/efka_codec.erl
@@ -20,7 +20,6 @@
 encode(PacketType, Packet) when is_integer(PacketType) ->
     Bin = encode0(Packet),
     <<PacketType, Bin/binary>>.
-
 encode0(#auth_request{uuid = UUID, username = Username, salt = Salt, token = Token, timestamp = Timestamp}) ->
     iolist_to_binary([
         marshal(?Bytes, UUID),
@@ -69,6 +68,7 @@ encode0(#event{service_id = ServiceId, event_type = EventType, params = Params})
         marshal(?Bytes, Params)
     ]).
 
+-spec decode(Bin :: binary()) -> any().
 decode(<<PacketType:8, Packet/binary>>) ->
     Fields = unmarshal(Packet),
     decode0(PacketType, Fields).
@@ -93,15 +93,17 @@ decode0(?MESSAGE_EVENT, [ServiceId, EventType, Params]) ->
 %%% helper methods
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-marshal(?I32, Field) ->
+-spec marshal(Type :: integer(), Field :: any()) -> binary().
+marshal(?I32, Field) when is_integer(Field) ->
     <<?I32, Field:32>>;
 marshal(?Bytes, undefined) ->
     <<?Bytes>>;
-marshal(?Bytes, Field) ->
+marshal(?Bytes, Field) when is_binary(Field) ->
     Len = byte_size(Field),
     <<?Bytes, Len:16, Field/binary>>.
 
-unmarshal(Bin) ->
+-spec unmarshal(Bin :: binary()) -> Components :: [any()].
+unmarshal(Bin) when is_binary(Bin) ->
     unmarshal(Bin, []).
 unmarshal(<<>>, Acc) ->
     lists:reverse(Acc);