[Amaru]

Набросал хендлер для SMSG_TRADE_STATUS_EXTENDED
http://paste2.org/p/2075442

void WorldSession::SendUpdateTrade(bool trader_state /*= true*/)
{
    TradeData* view_trade = trader_state ? _player->GetTradeData()->GetTraderData() : _player->GetTradeData();

    WorldPacket data(SMSG_TRADE_STATUS_EXTENDED, (100));    // guess size
    data << uint32(0);                                      // added in 2.4.0, this value must be equal to value from TRADE_STATUS_OPEN_WINDOW status packet (different value for different players to block multiple trades?)
    data << uint32(0);                                      // unk 2
    data << uint64(view_trade->GetMoney());                 // trader gold
    data << uint32(view_trade->GetSpell());                 // spell casted on lowest slot item
    data << uint32(TRADE_SLOT_COUNT);                       // trade slots count/number?, = next field in most cases
    data << uint32(0);                                      // unk 5
    data << uint8(trader_state ? 1 : 0);                    // send trader or own trade windows state (last need for proper show spell apply to non-trade slot)
    data << uint32(TRADE_SLOT_COUNT);                       // trade slots count/number?, = prev field in most cases

    uint8 itemCount = 0;
    for (uint8 i = 0; i < TRADE_SLOT_COUNT; ++i)
        if (Item* item = view_trade->GetItem(TradeSlots(i)))
            ++itemCount;

    data.WriteBits(itemCount, 22);

    uint8 creatorGuidMask[] = { 7, 1, 4, 6, 2, 3, 5, 0 };
    uint8 giftCreatorGuidMask[] = { 7, 1, 3, 6, 4, 2, 0, 5 };
    uint8 creatorGuidBytes[] = { 1, 6, 2, 7, 4, 3, 0, 5 };
    uint8 giftCreatorGuidBytes[] = { 6, 1, 7, 4, 0, 5, 2, 3 };

    for (uint8 i = 0; i < TRADE_SLOT_COUNT; ++i)
    {
        if (Item* item = view_trade->GetItem(TradeSlots(i)))
        {
            ObjectGuid creatorGuid = item->GetGuidValue(ITEM_FIELD_CREATOR);
            ObjectGuid giftCreatorGuid = item->GetGuidValue(ITEM_FIELD_GIFTCREATOR);

            data.WriteGuidMask(giftCreatorGuid, giftCreatorGuidMask, 2, 0);
            data.WriteBit(!item->HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED));
            data.WriteGuidMask(giftCreatorGuid, giftCreatorGuidMask, 1, 2);
            if (!item->HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED))
            {
                data.WriteGuidMask(creatorGuid, creatorGuidMask, 7, 0);
                data.WriteBit(item->GetProto()->LockID && !item->HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_UNLOCKED));
                data.WriteGuidMask(creatorGuid, creatorGuidMask, 1, 7);
            }
            data.WriteGuidMask(giftCreatorGuid, giftCreatorGuidMask, 5, 3);
        }
    }

    for (uint8 i = 0; i < TRADE_SLOT_COUNT; ++i)
    {
        if (Item* item = view_trade->GetItem(TradeSlots(i)))
        {
            ObjectGuid creatorGuid = item->GetGuidValue(ITEM_FIELD_CREATOR);
            ObjectGuid giftCreatorGuid = item->GetGuidValue(ITEM_FIELD_GIFTCREATOR);

            if (!item->HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED))
            {
                data.WriteGuidBytes(creatorGuid, creatorGuidBytes, 1, 0);
                data << uint32(item->GetEnchantmentId(PERM_ENCHANTMENT_SLOT));
                for (uint32 enchant_slot = SOCK_ENCHANTMENT_SLOT; enchant_slot < SOCK_ENCHANTMENT_SLOT + MAX_GEM_SOCKETS; ++enchant_slot)
                    data << uint32(item->GetEnchantmentId(EnchantmentSlot(enchant_slot)));
                data << uint32(item->GetUInt32Value(ITEM_FIELD_MAXDURABILITY));
                data.WriteGuidBytes(creatorGuid, creatorGuidBytes, 4, 1);
                data << uint32(0);                                  // reforge Id
                data << uint32(item->GetUInt32Value(ITEM_FIELD_DURABILITY));
                data << uint32(item->GetItemRandomPropertyId());
                data.WriteGuidBytes(creatorGuid, creatorGuidBytes, 1, 5);
                data << uint32(0);                                  // UnkInt32_4
                data.WriteGuidBytes(creatorGuid, creatorGuidBytes, 1, 6);
                data << uint32(item->GetSpellCharges());            // charges
                data << uint32(item->GetItemSuffixFactor());
                data.WriteGuidBytes(creatorGuid, creatorGuidBytes, 1, 7);
            }

            data.WriteGuidBytes(giftCreatorGuid, giftCreatorGuidBytes, 4, 0);
            data << uint32(item->GetProto()->ItemId);               // entry
            data.WriteGuidBytes(giftCreatorGuid, giftCreatorGuidBytes, 1, 4);
            data << uint32(item->GetCount());                       // stack count
            data.WriteGuidBytes(giftCreatorGuid, giftCreatorGuidBytes, 1, 5);
            data << uint8(i);
            data.WriteGuidBytes(giftCreatorGuid, giftCreatorGuidBytes, 2, 6);
        }
    }

    SendPacket(&data);
}