Function isUserAdmin

lottery/lottery.ts:651–703

(client: TelegramClient, chatId: string, userId: string)

      try {
        const participant = await client.invoke(
          new Api.channels.GetParticipant({
            channel: chatEntity,
            participant: userId,
          })
        );
        
        if (participant && participant.participant) {
          const participantType = participant.participant.className;
          return participantType === 'ChannelParticipantAdmin' || 
                 participantType === 'ChannelParticipantCreator';
        }
      } catch (e) {
        // 如果GetParticipant失败，可能是普通群组，尝试其他方法
        console.warn("GetParticipant failed, trying alternative method:", e);
      }
    }
    
    // 对于普通群组，尝试获取消息发送者的权限
    try {
      const chatAdmins = await client.invoke(
        new Api.channels.GetParticipants({
          channel: chatEntity,
          filter: new Api.ChannelParticipantsAdmins(),
          offset: 0,
          limit: 200,
          hash: bigInt(0)
        })
      );
      
      if (chatAdmins && (chatAdmins as any).participants) {
        return (chatAdmins as any).participants.some((p: any) => 
          String(p.userId || p.user_id) === String(userId)
        );
      }
    } catch (e) {
      // 如果仍然失败，返回false
      console.warn("Alternative admin check failed:", e);
    }
    
    return false;
  } catch (error) {
    console.error("Error checking admin status:", error);
    return false;
  }
}

async function performLotteryDraw(client: TelegramClient, lottery: any): Promise<void> {
  try {
    // Delete original lottery message
    if (lottery.message_id) {
      try {
        await client.deleteMessages(lottery.chat_id, [parseInt(lottery.message_id)], { revoke: true });
        console.log(`[lottery] Deleted original lottery message ${lottery.message_id}`);
      } catch (error) {
        console.warn("Failed to delete original lottery message:", error);
      }