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Custom commands panic the Twitch and Discord bots (nil CreatedAt after the gRPC move) #717

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Custom commands panic the Twitch and Discord bots (nil CreatedAt after the gRPC move)#717

Description

@emircan-sahin
emircan-sahin
opened on Sep 15, 2026

Describe the bug
Running any custom command (Twitch !foo, Discord /foo) panics and takes the bot process down. Nothing in the handlers recovers panics, and neither go-twitch-irc nor discordgo does either.

The gRPC → model conversion never copies created_at, so BotCommand.CreatedAt is always nil on the bot side:

monorepo/apps/twitch-bot/internal/service/service.go

Lines 153 to 168 in 35a83bd

func (s *service) GetUserBotCommand(ctx context.Context, commandName string, twitchChannelId string) (*model.BotCommand, error) {
cmd, err := s.botCommandClient.GetUserBotCommand(ctx, platform.TWITCH.String(), commandName, twitchChannelId)
if err != nil {
return nil, err
}
if cmd == nil {
return nil, nil
}
return &model.BotCommand{
ID: int(cmd.Id),
CommandName: cmd.CommandName,
CommandContent: cmd.CommandContent,
CommandType: int(cmd.CommandType),
Status: int(cmd.Status),
}, nil
}

(same in

monorepo/apps/discord-bot/internal/service/service.go

Lines 92 to 107 in 35a83bd

func (s *service) GetUserBotCommand(ctx context.Context, commandName string, discordServerId string) (*model.BotCommand, error) {
cmd, err := s.botCommandClient.GetUserBotCommand(ctx, platform.DISCORD.String(), commandName, discordServerId)
if err != nil {
return nil, err
}
if cmd == nil {
return nil, nil
}
return &model.BotCommand{
ID: int(cmd.Id),
CommandName: cmd.CommandName,
CommandContent: cmd.CommandContent,
CommandType: int(cmd.CommandType),
Status: int(cmd.Status),
}, nil
}
)

FormatCommandContent then formats that date for every command, even when the content has no {cmd.date}:

monorepo/helper/helpers.go

Lines 59 to 64 in 35a83bd

"{cmd.date}": cv.CommandCreatedAt.Format(dateTemplate),
"{channel.name}": cv.ChannelName,
// we will keep these old string templates used in commands for a while for backward compatibility.
"{user_name}": username,
"{cmd_date}": cv.CommandCreatedAt.Format(dateTemplate),

To Reproduce

  1. Add a custom command with !acmd hello world.
  2. Run !hello.
  3. panic: runtime error: invalid memory address or nil pointer dereference in helper.FormatCommandContent.

Reproduced with a real gRPC server and client over a fake DB row that has a created_at: after the round trip CreatedAt is <nil> and FormatCommandContent panics.

Expected behavior
The command replies with its content.

Suggested fix
Parse cmd.CreatedAt (RFC3339) in both converters, and only format CommandCreatedAt in helpers.go when it isn't nil.

Activity

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