Add strong typed int type BeingId.

87 files changed, 494 insertions, 388 deletions

diff --git a/src/net/adminhandler.h b/src/net/adminhandler.h
index 70e683769..77f0508a8 100644
--- a/src/net/adminhandler.h
+++ b/src/net/adminhandler.h
@@ -23,10 +23,12 @@
 #ifndef NET_ADMINHANDLER_H
 #define NET_ADMINHANDLER_H
 
-#include "localconsts.h"
+#include "enums/simpletypes/beingid.h"
 
 #include <string>
 
+#include "localconsts.h"
+
 class Being;
 
 namespace Net
@@ -44,7 +46,7 @@ class AdminHandler notfinal
 
         virtual void hide(const bool hide) const = 0;
 
-        virtual void kick(const int playerId) const = 0;
+        virtual void kick(const BeingId playerId) const = 0;
 
         virtual void kickName(const std::string &name) const = 0;
 
diff --git a/src/net/beinghandler.h b/src/net/beinghandler.h
index af6b05b8b..a99b0377c 100644
--- a/src/net/beinghandler.h
+++ b/src/net/beinghandler.h
@@ -26,6 +26,8 @@
 
 #include "enums/being/rank.h"
 
+#include "enums/simpletypes/beingid.h"
+
 #include "net/messagein.h"
 
 namespace Net
@@ -39,7 +41,7 @@ class BeingHandler notfinal
 
         virtual void handleMessage(Net::MessageIn &msg) = 0;
 
-        virtual void requestNameById(const int id) const = 0;
+        virtual void requestNameById(const BeingId id) const = 0;
 
         virtual void undress(Being *const being) const = 0;
 
diff --git a/src/net/charserverhandler.h b/src/net/charserverhandler.h
index 445545436..925346594 100644
--- a/src/net/charserverhandler.h
+++ b/src/net/charserverhandler.h
@@ -65,7 +65,7 @@ class CharServerHandler notfinal
         virtual void deleteCharacter(Net::Character *const character,
                                      const std::string &email) = 0;
 
-        virtual void renameCharacter(const int id,
+        virtual void renameCharacter(const BeingId id,
                                      const std::string &newName) = 0;
 
         virtual void switchCharacter() const = 0;
diff --git a/src/net/ea/beinghandler.cpp b/src/net/ea/beinghandler.cpp
index 51771fb30..ab32a3f84 100644
--- a/src/net/ea/beinghandler.cpp
+++ b/src/net/ea/beinghandler.cpp
@@ -43,16 +43,17 @@
 
 namespace Ea
 {
-int BeingHandler::mSpawnId = 0;
+BeingId BeingHandler::mSpawnId = BeingId_zero;
 bool BeingHandler::mSync = false;
 
 BeingHandler::BeingHandler(const bool enableSync)
 {
     mSync = enableSync;
-    mSpawnId = 0;
+    mSpawnId = BeingId_zero;
 }
 
-Being *BeingHandler::createBeing(const int id, const int16_t job)
+Being *BeingHandler::createBeing(const BeingId id,
+                                 const int16_t job)
 {
     if (!actorManager)
         return nullptr;
@@ -93,7 +94,7 @@ void BeingHandler::processBeingRemove(Net::MessageIn &msg)
 
     // A being should be removed or has died
 
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
     {
@@ -140,9 +141,9 @@ void BeingHandler::processSkillDamage(Net::MessageIn &msg)
 
     const int id = msg.readInt16("skill id");
     Being *const srcBeing = actorManager->findBeing(
-        msg.readInt32("src being id"));
+        msg.readBeingId("src being id"));
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("dst being id"));
+        msg.readBeingId("dst being id"));
     msg.readInt32("tick");
     msg.readInt32("src speed");
     msg.readInt32("dst speed");
@@ -167,9 +168,9 @@ void BeingHandler::processBeingAction(Net::MessageIn &msg)
     }
 
     Being *const srcBeing = actorManager->findBeing(
-        msg.readInt32("src being id"));
+        msg.readBeingId("src being id"));
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("dst being id"));
+        msg.readBeingId("dst being id"));
 
     msg.readInt32("tick");
     const int srcSpeed = msg.readInt32("src speed");
@@ -253,7 +254,8 @@ void BeingHandler::processBeingEmotion(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(
+        msg.readBeingId("being id"));
     if (!dstBeing)
     {
         BLOCK_END("BeingHandler::processBeingEmotion")
@@ -283,7 +285,7 @@ void BeingHandler::processNameResponse(Net::MessageIn &msg)
         return;
     }
 
-    const int beingId = msg.readInt32("being id");
+    const BeingId beingId = msg.readBeingId("being id");
     Being *const dstBeing = actorManager->findBeing(beingId);
 
     if (dstBeing)
@@ -344,7 +346,7 @@ void BeingHandler::processPlayerStop(Net::MessageIn &msg)
         return;
     }
 
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
 
     if (mSync || id != localPlayer->getId())
     {
@@ -409,7 +411,7 @@ void BeingHandler::processPvpMapMode(Net::MessageIn &msg)
 void BeingHandler::processPvpSet(Net::MessageIn &msg)
 {
     BLOCK_START("BeingHandler::processPvpSet")
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     const int rank = msg.readInt32("rank");
     msg.readInt32("num");
     if (actorManager)
@@ -431,7 +433,7 @@ void BeingHandler::processNameResponse2(Net::MessageIn &msg)
     }
 
     const int len = msg.readInt16("len");
-    const int beingId = msg.readInt32("account ic");
+    const BeingId beingId = msg.readBeingId("account ic");
     const std::string str = msg.readString(len - 8, "name");
     Being *const dstBeing = actorManager->findBeing(beingId);
     if (dstBeing)
@@ -481,7 +483,7 @@ void BeingHandler::processBeingMove3(Net::MessageIn &msg)
 
     const int len = msg.readInt16("len") - 14;
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("being id"));
+        msg.readBeingId("being id"));
     if (!dstBeing)
     {
         BLOCK_END("BeingHandler::processBeingMove3")
diff --git a/src/net/ea/beinghandler.h b/src/net/ea/beinghandler.h
index ca575e506..632381fb3 100644
--- a/src/net/ea/beinghandler.h
+++ b/src/net/ea/beinghandler.h
@@ -36,7 +36,7 @@ class BeingHandler notfinal : public Net::BeingHandler
     protected:
         explicit BeingHandler(const bool enableSync);
 
-        static Being *createBeing(const int id,
+        static Being *createBeing(const BeingId id,
                                   const int16_t job) A_WARN_UNUSED;
 
         static void setSprite(Being *const being, const unsigned int slot,
@@ -71,7 +71,7 @@ class BeingHandler notfinal : public Net::BeingHandler
         static void processBeingMove3(Net::MessageIn &msg);
 
         // Should we honor server "Stop Walking" packets
-        static int mSpawnId;
+        static BeingId mSpawnId;
         static bool mSync;
 };
 
diff --git a/src/net/ea/buysellhandler.cpp b/src/net/ea/buysellhandler.cpp
index e0f686cad..0e939c217 100644
--- a/src/net/ea/buysellhandler.cpp
+++ b/src/net/ea/buysellhandler.cpp
@@ -42,12 +42,12 @@
 namespace Ea
 {
 
-int BuySellHandler::mNpcId = 0;
+BeingId BuySellHandler::mNpcId = BeingId_zero;
 BuyDialog *BuySellHandler::mBuyDialog = nullptr;
 
 BuySellHandler::BuySellHandler()
 {
-    mNpcId = 0;
+    mNpcId = BeingId_zero;
     mBuyDialog = nullptr;
 }
 
@@ -55,7 +55,7 @@ void BuySellHandler::processNpcBuySellChoice(Net::MessageIn &msg)
 {
     if (!BuySellDialog::isActive())
     {
-        mNpcId = msg.readInt32("npc id");
+        mNpcId = msg.readBeingId("npc id");
         BuySellDialog *const dialog = new BuySellDialog(mNpcId);
         dialog->postInit();
     }
diff --git a/src/net/ea/buysellhandler.h b/src/net/ea/buysellhandler.h
index e972b1208..1667332bb 100644
--- a/src/net/ea/buysellhandler.h
+++ b/src/net/ea/buysellhandler.h
@@ -23,6 +23,8 @@
 #ifndef NET_EA_BUYSELLHANDLER_H
 #define NET_EA_BUYSELLHANDLER_H
 
+#include "enums/simpletypes/beingid.h"
+
 #include "net/buysellhandler.h"
 
 class BuyDialog;
@@ -44,7 +46,7 @@ class BuySellHandler notfinal : public Net::BuySellHandler
 
         static void processNpcBuyResponse(Net::MessageIn &msg);
 
-        static int mNpcId;
+        static BeingId mNpcId;
         static BuyDialog *mBuyDialog;
 };
 
diff --git a/src/net/ea/chathandler.cpp b/src/net/ea/chathandler.cpp
index a08b2b9e6..554276d17 100644
--- a/src/net/ea/chathandler.cpp
+++ b/src/net/ea/chathandler.cpp
@@ -148,7 +148,7 @@ void ChatHandler::processMVPEffect(Net::MessageIn &msg)
 {
     BLOCK_START("ChatHandler::processMVPEffect")
     // Display MVP player
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     if (localChatTab && actorManager && config.getBoolValue("showMVP"))
     {
         const Being *const being = actorManager->findBeing(id);
diff --git a/src/net/ea/gamehandler.cpp b/src/net/ea/gamehandler.cpp
index 31c487921..583ef3409 100644
--- a/src/net/ea/gamehandler.cpp
+++ b/src/net/ea/gamehandler.cpp
@@ -42,13 +42,13 @@ namespace Ea
 {
 
 std::string GameHandler::mMap;
-int GameHandler::mCharID = 0;
+BeingId GameHandler::mCharID = BeingId_zero;
 
 GameHandler::GameHandler() :
     Net::GameHandler()
 {
     mMap.clear();
-    mCharID = 0;
+    mCharID = BeingId_zero;
 }
 
 void GameHandler::who() const
@@ -92,7 +92,7 @@ void GameHandler::processMapQuitResponse(Net::MessageIn &msg)
 void GameHandler::clear()
 {
     mMap.clear();
-    mCharID = 0;
+    mCharID = BeingId_zero;
 }
 
 void GameHandler::initEngines() const
diff --git a/src/net/ea/gamehandler.h b/src/net/ea/gamehandler.h
index 4ecc85692..7ff3a5ca9 100644
--- a/src/net/ea/gamehandler.h
+++ b/src/net/ea/gamehandler.h
@@ -23,6 +23,8 @@
 #ifndef NET_EA_GAMEHANDLER_H
 #define NET_EA_GAMEHANDLER_H
 
+#include "enums/simpletypes/beingid.h"
+
 #include "net/gamehandler.h"
 
 namespace Net
@@ -62,7 +64,7 @@ class GameHandler notfinal : public Net::GameHandler
 
     protected:
         static std::string mMap;
-        static int mCharID;  // < Saved for map-server switching
+        static BeingId mCharID;  // < Saved for map-server switching
 };
 
 }  // namespace Ea
diff --git a/src/net/ea/guildhandler.cpp b/src/net/ea/guildhandler.cpp
index 13317699b..96956b2d9 100644
--- a/src/net/ea/guildhandler.cpp
+++ b/src/net/ea/guildhandler.cpp
@@ -186,7 +186,7 @@ void GuildHandler::processGuildMemberList(Net::MessageIn &msg)
     int totalNum = 0;
     for (int i = 0; i < count; i++)
     {
-        const int id = msg.readInt32("account id");
+        const BeingId id = msg.readBeingId("account id");
         const int charId = msg.readInt32("char id");
         msg.readInt16("hair");
         msg.readInt16("hair color");
@@ -290,7 +290,7 @@ void GuildHandler::processGuildPositionChanged(Net::MessageIn &msg)
 void GuildHandler::processGuildMemberPosChange(Net::MessageIn &msg)
 {
     msg.readInt16("len");
-    const int accountId = msg.readInt32("account id");
+    const BeingId accountId = msg.readBeingId("account id");
     const int charId = msg.readInt32("char id");
     const int pos = msg.readInt32("position");
     if (taGuild)
diff --git a/src/net/ea/inventoryhandler.h b/src/net/ea/inventoryhandler.h
index 26d74d56a..6050baaff 100644
--- a/src/net/ea/inventoryhandler.h
+++ b/src/net/ea/inventoryhandler.h
@@ -41,7 +41,7 @@ namespace Ea
 {
 
 typedef std::vector<InventoryItem> InventoryItems;
-typedef std::queue<int> PickupQueue;
+typedef std::queue<BeingId> PickupQueue;
 
 class InventoryHandler notfinal : public Net::InventoryHandler
 {
@@ -65,7 +65,7 @@ class InventoryHandler notfinal : public Net::InventoryHandler
 
         size_t getSize(const int type) const override final A_WARN_UNUSED;
 
-        void pushPickup(const int floorId)
+        void pushPickup(const BeingId floorId)
         { mSentPickups.push(floorId); }
 
         static int getSlot(const int eAthenaSlot) A_WARN_UNUSED;
diff --git a/src/net/ea/itemhandler.cpp b/src/net/ea/itemhandler.cpp
index a4c1a164b..2c297f69f 100644
--- a/src/net/ea/itemhandler.cpp
+++ b/src/net/ea/itemhandler.cpp
@@ -41,7 +41,7 @@ ItemHandler::~ItemHandler()
 
 void ItemHandler::processItemVisible(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("item object id");
+    const BeingId id = msg.readBeingId("item object id");
     const int itemId = msg.readInt16("item id");
     const uint8_t identify = msg.readUInt8("identify");
     const int x = msg.readInt16("x");
@@ -62,7 +62,7 @@ void ItemHandler::processItemRemove(Net::MessageIn &msg)
     if (actorManager)
     {
         if (FloorItem *const item = actorManager
-            ->findItem(msg.readInt32("floor item id")))
+            ->findItem(msg.readBeingId("floor item id")))
         {
             actorManager->destroy(item);
         }
diff --git a/src/net/ea/loginhandler.cpp b/src/net/ea/loginhandler.cpp
index 8b8077cde..396eb1480 100644
--- a/src/net/ea/loginhandler.cpp
+++ b/src/net/ea/loginhandler.cpp
@@ -163,7 +163,7 @@ void LoginHandler::processLoginData(Net::MessageIn &msg)
     const int worldCount = (msg.getLength() - 47) / 32;
 
     mToken.session_ID1 = msg.readInt32("session id1");
-    mToken.account_ID = msg.readInt32("accound id");
+    mToken.account_ID = msg.readBeingId("accound id");
     mToken.session_ID2 = msg.readInt32("session id2");
     msg.readInt32("old ip");
     loginData.lastLogin = msg.readString(24, "last login");
diff --git a/src/net/ea/npchandler.cpp b/src/net/ea/npchandler.cpp
index a88025b7f..bfa3c3f81 100644
--- a/src/net/ea/npchandler.cpp
+++ b/src/net/ea/npchandler.cpp
@@ -104,7 +104,7 @@ void NpcHandler::processNpcIntInput(Net::MessageIn &msg)
 void NpcHandler::processNpcStrInput(Net::MessageIn &msg)
 {
     // Request for a string
-    int npcId = npcHandler->getNpc(msg);
+    BeingId npcId = npcHandler->getNpc(msg);
     if (mRequestLang)
     {
         mRequestLang = false;
@@ -118,11 +118,11 @@ void NpcHandler::processNpcStrInput(Net::MessageIn &msg)
 
 void NpcHandler::processNpcCommand(Net::MessageIn &msg)
 {
-    const int npcId = npcHandler->getNpc(msg);
+    const BeingId npcId = npcHandler->getNpc(msg);
     mRequestLang = false;
 
     const int cmd = msg.readInt16("cmd");
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     const int x = msg.readInt16("x");
     const int y = msg.readInt16("y");
     switch (cmd)
@@ -139,7 +139,7 @@ void NpcHandler::processNpcCommand(Net::MessageIn &msg)
         case 2:
             if (viewport)
             {
-                if (!id)
+                if (id == BeingId_zero)
                     viewport->moveCameraToPosition(x, y);
                 else
                     viewport->moveCameraToActor(id, x, y);
@@ -165,7 +165,7 @@ void NpcHandler::processNpcCommand(Net::MessageIn &msg)
         case 6:  // show avatar
             if (mDialog)
             {
-                mDialog->showAvatar(static_cast<uint16_t>(id));
+                mDialog->showAvatar(id);
             }
             break;
         case 7:  // set avatar direction
@@ -178,7 +178,7 @@ void NpcHandler::processNpcCommand(Net::MessageIn &msg)
             break;
         case 8:  // set avatar action
             if (mDialog)
-                mDialog->setAvatarAction(id);
+                mDialog->setAvatarAction(toInt(id, int));
             break;
         case 9:  // clear npc dialog
             if (mDialog)
@@ -186,7 +186,7 @@ void NpcHandler::processNpcCommand(Net::MessageIn &msg)
             break;
         case 10:  // send selected item id
         {
-            int invSize = id;
+            int invSize = toInt(id, int);
             if (!invSize)
                 invSize = 1;
             if (mDialog)
diff --git a/src/net/ea/partyhandler.cpp b/src/net/ea/partyhandler.cpp
index f30a0a83f..1af9ba7ef 100644
--- a/src/net/ea/partyhandler.cpp
+++ b/src/net/ea/partyhandler.cpp
@@ -140,7 +140,7 @@ void PartyHandler::processPartySettingsContinue(Net::MessageIn &msg,
 
 void PartyHandler::processPartyLeave(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const std::string nick = msg.readString(24, "nick");
     const int reason = msg.readUInt8("flag");
     if (!localPlayer)
@@ -224,7 +224,7 @@ void PartyHandler::processPartyLeave(Net::MessageIn &msg)
 
 void PartyHandler::processPartyUpdateCoords(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("account id");
     PartyMember *m = nullptr;
     if (Ea::taParty)
         m = Ea::taParty->getMember(id);
diff --git a/src/net/ea/token.h b/src/net/ea/token.h
index 65368b6e2..a62136aee 100644
--- a/src/net/ea/token.h
+++ b/src/net/ea/token.h
@@ -20,6 +20,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "enums/simpletypes/beingid.h"
 #include "enums/being/gender.h"
 
 #ifndef NET_EA_TOKEN_H
@@ -27,14 +28,14 @@
 
 struct Token final
 {
-    int account_ID;
+    BeingId account_ID;
     int session_ID1;
     int session_ID2;
     Gender::Type sex;
 
     void clear()
     {
-        account_ID = 0;
+        account_ID = BeingId_zero;
         session_ID1 = 0;
         session_ID2 = 0;
         sex = Gender::UNSPECIFIED;
diff --git a/src/net/eathena/adminhandler.cpp b/src/net/eathena/adminhandler.cpp
index 75250d2b7..92e158a8e 100644
--- a/src/net/eathena/adminhandler.cpp
+++ b/src/net/eathena/adminhandler.cpp
@@ -95,10 +95,10 @@ void AdminHandler::hide(const bool h A_UNUSED) const
     outMsg.writeInt32(0, "unused");
 }
 
-void AdminHandler::kick(const int playerId) const
+void AdminHandler::kick(const BeingId playerId) const
 {
     createOutPacket(CMSG_ADMIN_KICK);
-    outMsg.writeInt32(playerId, "account id");
+    outMsg.writeBeingId(playerId, "account id");
 }
 
 void AdminHandler::kickAll() const
@@ -146,7 +146,7 @@ void AdminHandler::mute(const Being *const being,
         return;
 
     createOutPacket(CMSG_ADMIN_MUTE);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt8(static_cast<int8_t>(type), "type");
     outMsg.writeInt16(static_cast<int16_t>(limit), "value");
 }
@@ -163,7 +163,7 @@ void AdminHandler::requestLogin(const Being *const being) const
         return;
 
     createOutPacket(CMSG_ADMIN_ID_TO_LOGIN);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void AdminHandler::setTileType(const int x, const int y,
@@ -181,13 +181,13 @@ void AdminHandler::unequipAll(const Being *const being) const
         return;
 
     createOutPacket(CMSG_ADMIN_UNEQUIP_ALL);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void AdminHandler::processAdminGetLoginAck(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readString(24, "login");
 }
 
diff --git a/src/net/eathena/adminhandler.h b/src/net/eathena/adminhandler.h
index 7faf9b383..e1e76f75f 100644
--- a/src/net/eathena/adminhandler.h
+++ b/src/net/eathena/adminhandler.h
@@ -45,7 +45,7 @@ class AdminHandler final : public MessageHandler, public Ea::AdminHandler
 
         void hide(const bool h) const override final;
 
-        void kick(const int playerId) const override final;
+        void kick(const BeingId playerId) const override final;
 
         void kickAll() const override final;
 
diff --git a/src/net/eathena/battlegroundhandler.cpp b/src/net/eathena/battlegroundhandler.cpp
index 3444c9434..dd1f6bfe9 100644
--- a/src/net/eathena/battlegroundhandler.cpp
+++ b/src/net/eathena/battlegroundhandler.cpp
@@ -95,7 +95,7 @@ void BattleGroundHandler::handleMessage(Net::MessageIn &msg)
 void BattleGroundHandler::processBattleEmblem(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readString(24, "name");
     msg.readInt16("camp");
 }
@@ -110,7 +110,7 @@ void BattleGroundHandler::processBattleUpdateScore(Net::MessageIn &msg)
 void BattleGroundHandler::processBattleUpdateCoords(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readString(24, "name");
     msg.readInt16("class");
     msg.readInt16("x");
diff --git a/src/net/eathena/beinghandler.cpp b/src/net/eathena/beinghandler.cpp
index 29b7a2578..9bc79c407 100644
--- a/src/net/eathena/beinghandler.cpp
+++ b/src/net/eathena/beinghandler.cpp
@@ -142,10 +142,10 @@ BeingHandler::BeingHandler(const bool enableSync) :
     beingHandler = this;
 }
 
-void BeingHandler::requestNameById(const int id) const
+void BeingHandler::requestNameById(const BeingId id) const
 {
     createOutPacket(CMSG_NAME_REQUEST);
-    outMsg.writeInt32(id, "being id");
+    outMsg.writeBeingId(id, "being id");
 }
 
 void BeingHandler::handleMessage(Net::MessageIn &msg)
@@ -414,7 +414,7 @@ void BeingHandler::handleMessage(Net::MessageIn &msg)
 }
 
 Being *BeingHandler::createBeing2(Net::MessageIn &msg,
-                                  const int id,
+                                  const BeingId id,
                                   const int16_t job,
                                   const BeingType::BeingType beingType)
 {
@@ -497,7 +497,7 @@ void BeingHandler::processBeingChangeLook2(Net::MessageIn &msg)
         return;
 
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("being id"));
+        msg.readBeingId("being id"));
     const uint8_t type = msg.readUInt8("type");
 
     const int id = msg.readInt16("id1");
@@ -627,13 +627,13 @@ void BeingHandler::processBeingVisible(Net::MessageIn &msg)
         msg.readUInt8("object type"));
 
     // Information about a being in range
-    const int id = msg.readInt32("being id");
-    int spawnId;
+    const BeingId id = msg.readBeingId("being id");
+    BeingId spawnId;
     if (id == mSpawnId)
         spawnId = mSpawnId;
     else
-        spawnId = 0;
-    mSpawnId = 0;
+        spawnId = BeingId_zero;
+    mSpawnId = BeingId_zero;
 
     int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
@@ -673,7 +673,7 @@ void BeingHandler::processBeingVisible(Net::MessageIn &msg)
     if (dstBeing->getType() == ActorType::Player)
         dstBeing->setMoveTime();
 
-    if (spawnId)
+    if (spawnId != BeingId_zero)
     {
         dstBeing->setAction(BeingAction::SPAWN, 0);
     }
@@ -787,13 +787,13 @@ void BeingHandler::processBeingMove(Net::MessageIn &msg)
         msg.readUInt8("object type"));
 
     // Information about a being in range
-    const int id = msg.readInt32("being id");
-    int spawnId;
+    const BeingId id = msg.readBeingId("being id");
+    BeingId spawnId;
     if (id == mSpawnId)
         spawnId = mSpawnId;
     else
-        spawnId = 0;
-    mSpawnId = 0;
+        spawnId = BeingId_zero;
+    mSpawnId = BeingId_zero;
     int16_t speed = msg.readInt16("speed");
 //    if (visible)
 //    {
@@ -841,7 +841,7 @@ void BeingHandler::processBeingMove(Net::MessageIn &msg)
     if (dstBeing->getType() == ActorType::Player)
         dstBeing->setMoveTime();
 
-    if (spawnId)
+    if (spawnId != BeingId_zero)
         dstBeing->setAction(BeingAction::SPAWN, 0);
 
     // Prevent division by 0 when calculating frame
@@ -961,9 +961,9 @@ void BeingHandler::processBeingSpawn(Net::MessageIn &msg)
         msg.readUInt8("object type"));
 
     // Information about a being in range
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     mSpawnId = id;
-    const int spawnId = id;
+    const BeingId spawnId = id;
     int16_t speed = msg.readInt16("speed");
 //    if (visible)
 //    {
@@ -1011,10 +1011,8 @@ void BeingHandler::processBeingSpawn(Net::MessageIn &msg)
     if (dstBeing->getType() == ActorType::Player)
         dstBeing->setMoveTime();
 
-    if (spawnId)
-    {
+    if (spawnId != BeingId_zero)
         dstBeing->setAction(BeingAction::SPAWN, 0);
-    }
 
     // Prevent division by 0 when calculating frame
     if (speed == 0)
@@ -1138,8 +1136,8 @@ void BeingHandler::processSkillCasting(Net::MessageIn &msg)
 {
     // +++ need use other parameters
 
-    const int srcId = msg.readInt32("src id");
-    const int dstId = msg.readInt32("dst id");
+    const BeingId srcId = msg.readBeingId("src id");
+    const BeingId dstId = msg.readBeingId("dst id");
     const int dstX = msg.readInt16("dst x");
     const int dstY = msg.readInt16("dst y");
     const int skillId = msg.readInt16("skill id");
@@ -1150,12 +1148,12 @@ void BeingHandler::processSkillCasting(Net::MessageIn &msg)
     if (!effectManager)
         return;
 
-    if (srcId == 0)
+    if (srcId == BeingId_zero)
     {
         UNIMPLIMENTEDPACKET;
         return;
     }
-    else if (dstId != 0)
+    else if (dstId != BeingId_zero)
     {   // being to being
         Being *const srcBeing = actorManager->findBeing(srcId);
         Being *const dstBeing = actorManager->findBeing(dstId);
@@ -1179,7 +1177,7 @@ void BeingHandler::processBeingStatusChange(Net::MessageIn &msg)
 
     // Status change
     const uint16_t status = msg.readInt16("status");
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     const Enable flag = fromBool(
         msg.readUInt8("flag: 0: stop, 1: start"), Enable);
     msg.readInt32("total");
@@ -1205,7 +1203,7 @@ void BeingHandler::processBeingStatusChange2(Net::MessageIn &msg)
 
     // Status change
     const uint16_t status = msg.readInt16("status");
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     const Enable flag = fromBool(
         msg.readUInt8("flag: 0: stop, 1: start"), Enable);
     msg.readInt32("left");
@@ -1233,7 +1231,7 @@ void BeingHandler::processBeingMove2(Net::MessageIn &msg)
       * later versions of eAthena for both mobs and
       * players
       */
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     uint16_t srcX, srcY, dstX, dstY;
     msg.readCoordinatePair(srcX, srcY, dstX, dstY, "move path");
@@ -1272,9 +1270,9 @@ void BeingHandler::processBeingAction2(Net::MessageIn &msg)
     }
 
     Being *const srcBeing = actorManager->findBeing(
-        msg.readInt32("src being id"));
+        msg.readBeingId("src being id"));
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("dst being id"));
+        msg.readBeingId("dst being id"));
 
     msg.readInt32("tick");
     const int srcSpeed = msg.readInt32("src speed");
@@ -1356,7 +1354,7 @@ void BeingHandler::processBeingAction2(Net::MessageIn &msg)
 void BeingHandler::processMonsterHp(Net::MessageIn &msg)
 {
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("monster id"));
+        msg.readBeingId("monster id"));
     const int hp = msg.readInt32("hp");
     const int maxHP = msg.readInt32("max hp");
     if (dstBeing)
@@ -1440,7 +1438,7 @@ void BeingHandler::processBeingChangeDirection(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     msg.readInt16("head direction");
 
@@ -1464,7 +1462,7 @@ void BeingHandler::processBeingSpecialEffect(Net::MessageIn &msg)
     if (!effectManager || !actorManager)
         return;
 
-    const int id = static_cast<uint32_t>(msg.readInt32("being id"));
+    const BeingId id = msg.readBeingId("being id");
     Being *const being = actorManager->findBeing(id);
     if (!being)
         return;
@@ -1487,7 +1485,7 @@ void BeingHandler::processBeingSpecialEffectNum(Net::MessageIn &msg)
     UNIMPLIMENTEDPACKET;
     // +++ need somhow show this effects.
     // type is not same with self/misc effect.
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("effect type");
     msg.readInt32("num");  // effect variable
 }
@@ -1539,7 +1537,7 @@ void BeingHandler::viewPlayerEquipment(const Being *const being)
         return;
 
     createOutPacket(CMSG_PLAYER_VIEW_EQUIPMENT);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void BeingHandler::processSkillGroundNoDamage(Net::MessageIn &msg)
@@ -1577,7 +1575,7 @@ void BeingHandler::processPlaterStatusChange(Net::MessageIn &msg)
     }
 
     // Change in players' flags
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
         return;
@@ -1600,7 +1598,7 @@ void BeingHandler::processPlaterStatusChange2(Net::MessageIn &msg)
     if (!actorManager)
         return;
 
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
         return;
@@ -1618,7 +1616,7 @@ void BeingHandler::processPlaterStatusChange2(Net::MessageIn &msg)
 void BeingHandler::processPlaterStatusChangeNoTick(Net::MessageIn &msg)
 {
     const uint16_t status = msg.readInt16("index");
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const Enable flag = fromBool(msg.readUInt8("state")
         ? true : false, Enable);
 
@@ -1640,7 +1638,7 @@ void BeingHandler::processBeingResurrect(Net::MessageIn &msg)
 
     // A being changed mortality status
 
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     msg.readInt16("unused");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
@@ -1666,7 +1664,7 @@ void BeingHandler::processPlayerGuilPartyInfo(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     if (dstBeing)
     {
@@ -1690,7 +1688,7 @@ void BeingHandler::processBeingFakeName(Net::MessageIn &msg)
 {
     const BeingType::BeingType type = static_cast<BeingType::BeingType>(
         msg.readUInt8("object type"));
-    const int id = msg.readInt32("npc id");
+    const BeingId id = msg.readBeingId("npc id");
     msg.skip(8, "unused");
     const uint16_t job = msg.readInt16("class?");  // 111
     msg.skip(30, "unused");
@@ -1709,7 +1707,7 @@ void BeingHandler::processBeingFakeName(Net::MessageIn &msg)
 
 void BeingHandler::processBeingStatUpdate1(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int type = msg.readInt16("type");
     const int value = msg.readInt32("value");
 
@@ -1734,7 +1732,7 @@ void BeingHandler::processBeingSelfEffect(Net::MessageIn &msg)
         return;
     }
 
-    const int id = static_cast<uint32_t>(msg.readInt32("being id"));
+    const BeingId id = msg.readBeingId("being id");
     Being *const being = actorManager->findBeing(id);
     if (!being)
     {
@@ -1755,7 +1753,7 @@ void BeingHandler::processMobInfo(Net::MessageIn &msg)
     if (len < 12)
         return;
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("monster id"));
+        msg.readBeingId("monster id"));
     const int attackRange = msg.readInt32("range");
     if (dstBeing)
         dstBeing->setAttackRange(attackRange);
@@ -1767,7 +1765,7 @@ void BeingHandler::processBeingAttrs(Net::MessageIn &msg)
     if (len < 12)
         return;
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("player id"));
+        msg.readBeingId("player id"));
     const int gmLevel = msg.readInt32("gm level");
     if (dstBeing && gmLevel)
     {
@@ -1802,7 +1800,7 @@ void BeingHandler::processClassChange(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readUInt8("type");
     msg.readInt32("class");
 }
@@ -1811,7 +1809,7 @@ void BeingHandler::processSpiritBalls(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt16("spirits amount");
 }
 
@@ -1819,7 +1817,7 @@ void BeingHandler::processSpiritBallSingle(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt16("spirits amount");
 }
 
@@ -1836,7 +1834,7 @@ void BeingHandler::processComboDelay(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt32("wait");
 }
 
@@ -1844,14 +1842,14 @@ void BeingHandler::processWddingEffect(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
 }
 
 void BeingHandler::processBeingSlide(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt16("x");
     msg.readInt16("y");
 }
@@ -1891,7 +1889,7 @@ void BeingHandler::processBeingFont(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt16("font");
 }
 
@@ -1899,7 +1897,7 @@ void BeingHandler::processBeingMilleniumShield(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt16("shields");
     msg.readInt16("unused");
 }
@@ -1908,7 +1906,7 @@ void BeingHandler::processBeingCharm(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt16("charm type");
     msg.readInt16("charm count");
 }
diff --git a/src/net/eathena/beinghandler.h b/src/net/eathena/beinghandler.h
index f6fb1df78..e60318314 100644
--- a/src/net/eathena/beinghandler.h
+++ b/src/net/eathena/beinghandler.h
@@ -40,7 +40,7 @@ class BeingHandler final : public MessageHandler, public Ea::BeingHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void requestNameById(const int id) const override final;
+        void requestNameById(const BeingId id) const override final;
 
         void undress(Being *const being) const override final;
 
@@ -48,7 +48,7 @@ class BeingHandler final : public MessageHandler, public Ea::BeingHandler
 
     protected:
         static Being *createBeing2(Net::MessageIn &msg,
-                                   const int id,
+                                   const BeingId id,
                                    const int16_t job,
                                    const BeingType::BeingType beingType);
 
diff --git a/src/net/eathena/buyingstorehandler.cpp b/src/net/eathena/buyingstorehandler.cpp
index a68111dc1..baaee1aca 100644
--- a/src/net/eathena/buyingstorehandler.cpp
+++ b/src/net/eathena/buyingstorehandler.cpp
@@ -150,7 +150,7 @@ void BuyingStoreHandler::processBuyingStoreCreateFailed(Net::MessageIn &msg)
 void BuyingStoreHandler::processBuyingStoreOwnItems(Net::MessageIn &msg)
 {
     const int count = (msg.readInt16("len") - 12) / 9;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("money limit");
     for (int f = 0; f < count; f ++)
     {
@@ -165,7 +165,7 @@ void BuyingStoreHandler::processBuyingStoreOwnItems(Net::MessageIn &msg)
 
 void BuyingStoreHandler::processBuyingStoreShowBoard(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("owner id");
+    const BeingId id = msg.readBeingId("owner id");
     const std::string shopName = msg.readString(80, "shop name");
     Being *const dstBeing = actorManager->findBeing(id);
     if (dstBeing)
@@ -174,7 +174,7 @@ void BuyingStoreHandler::processBuyingStoreShowBoard(Net::MessageIn &msg)
 
 void BuyingStoreHandler::processBuyingStoreHideBoard(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("owner id");
+    const BeingId id = msg.readBeingId("owner id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (dstBeing)
         dstBeing->setBuyBoard(std::string());
@@ -188,7 +188,7 @@ void BuyingStoreHandler::processBuyingStoreHideBoard(Net::MessageIn &msg)
 void BuyingStoreHandler::processBuyingStoreItemsList(Net::MessageIn &msg)
 {
     const int count = (msg.readInt16("len") - 16) / 9;
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int storeId = msg.readInt32("store id");
     // +++ in future need use it too
     msg.readInt32("money limit");
@@ -321,7 +321,7 @@ void BuyingStoreHandler::open(const Being *const being) const
     if (!being)
         return;
     createOutPacket(CMSG_BUYINGSTORE_OPEN);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void BuyingStoreHandler::sell(const Being *const being,
@@ -334,7 +334,7 @@ void BuyingStoreHandler::sell(const Being *const being,
 
     createOutPacket(CMSG_BUYINGSTORE_SELL);
     outMsg.writeInt16(18, "len");
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt32(storeId, "store id");
     outMsg.writeInt16(static_cast<int16_t>(
         item->getInvIndex() + INVENTORY_OFFSET),
diff --git a/src/net/eathena/cashshophandler.cpp b/src/net/eathena/cashshophandler.cpp
index 90eb1b2af..c2b872eca 100644
--- a/src/net/eathena/cashshophandler.cpp
+++ b/src/net/eathena/cashshophandler.cpp
@@ -95,7 +95,7 @@ void CashShopHandler::processCashShopOpen(Net::MessageIn &msg)
 {
     const int count = (msg.readInt16("len") - 12) / 11;
 
-    mBuyDialog = new BuyDialog(BuyDialog::Cash);
+    mBuyDialog = new BuyDialog(fromInt(BuyDialog::Cash, BeingId));
     mBuyDialog->postInit();
     mBuyDialog->setMoney(PlayerInfo::getAttribute(Attributes::MONEY));
 
diff --git a/src/net/eathena/charserverhandler.cpp b/src/net/eathena/charserverhandler.cpp
index 0a634c80f..f94e3a34f 100644
--- a/src/net/eathena/charserverhandler.cpp
+++ b/src/net/eathena/charserverhandler.cpp
@@ -64,8 +64,8 @@ extern ServerInfo mapServer;
 
 std::string CharServerHandler::mNewName;
 uint32_t CharServerHandler::mPinSeed = 0;
-uint32_t CharServerHandler::mPinAccountId = 0;
-uint32_t CharServerHandler::mRenameId = 0;
+BeingId CharServerHandler::mPinAccountId = BeingId_zero;
+BeingId CharServerHandler::mRenameId = BeingId_zero;
 bool CharServerHandler::mNeedCreatePin = false;
 
 CharServerHandler::CharServerHandler() :
@@ -74,8 +74,8 @@ CharServerHandler::CharServerHandler() :
 {
     mNewName.clear();
     mPinSeed = 0;
-    mPinAccountId = 0;
-    mRenameId = 0;
+    mPinAccountId = BeingId_zero;
+    mRenameId = BeingId_zero;
     mNeedCreatePin = false;
 
     static const uint16_t _messages[] =
@@ -201,7 +201,7 @@ void CharServerHandler::readPlayerData(Net::MessageIn &msg,
         static_cast<LoginHandler*>(loginHandler)->getToken();
 
     LocalPlayer *const tempPlayer = new LocalPlayer(
-        msg.readInt32("player id"), 0);
+        msg.readBeingId("player id"), 0);
     tempPlayer->setGender(token.sex);
 
     PlayerInfoBackend &data = character->data;
@@ -337,7 +337,7 @@ void CharServerHandler::deleteCharacter(Net::Character *const character,
     mSelectedCharacter = character;
 
     createOutPacket(CMSG_CHAR_DELETE);
-    outMsg.writeInt32(mSelectedCharacter->dummy->getId(), "id?");
+    outMsg.writeBeingId(mSelectedCharacter->dummy->getId(), "id?");
     if (email.empty())
         outMsg.writeString("a@a.com", 40, "email");
     else
@@ -362,7 +362,7 @@ void CharServerHandler::connect()
     mNetwork->disconnect();
     mNetwork->connect(charServer);
     createOutPacket(CMSG_CHAR_SERVER_CONNECT);
-    outMsg.writeInt32(token.account_ID, "account id");
+    outMsg.writeBeingId(token.account_ID, "account id");
     outMsg.writeInt32(token.session_ID1, "session id1");
     outMsg.writeInt32(token.session_ID2, "session id2");
     outMsg.writeInt16(CLIENT_PROTOCOL_VERSION, "client protocol version");
@@ -497,7 +497,7 @@ void CharServerHandler::processChangeMapServer(Net::MessageIn &msg)
 void CharServerHandler::processPincodeStatus(Net::MessageIn &msg)
 {
     mPinSeed = msg.readInt32("pincode seed");
-    mPinAccountId = msg.readInt32("account id");
+    mPinAccountId = msg.readBeingId("account id");
     const uint16_t state = static_cast<uint16_t>(msg.readInt16("state"));
     switch (state)
     {
@@ -532,7 +532,7 @@ void CharServerHandler::setNewPincode(const std::string &pin A_UNUSED)
 //  here need ecript pin with mPinSeed and pin values.
 
 //    createOutPacket(CMSG_CHAR_CREATE_PIN);
-//    outMsg.writeInt32(mPinAccountId, "account id");
+//    outMsg.writeBeingId(mPinAccountId, "account id");
 //    outMsg.writeString(pin, 4, "encrypted pin");
 }
 
@@ -554,13 +554,13 @@ void CharServerHandler::processCharCreate(Net::MessageIn &msg)
     BLOCK_END("CharServerHandler::processCharCreate")
 }
 
-void CharServerHandler::renameCharacter(const int id,
+void CharServerHandler::renameCharacter(const BeingId id,
                                         const std::string &newName)
 {
     createOutPacket(CMSG_CHAR_CHECK_RENAME);
     mRenameId = id;
     mNewName = newName;
-    outMsg.writeInt32(id, "char id");
+    outMsg.writeBeingId(id, "char id");
     outMsg.writeString(newName, 24, "name");
 }
 
@@ -569,7 +569,7 @@ void CharServerHandler::processCharCheckRename(Net::MessageIn &msg)
     if (msg.readInt16("flag"))
     {
         createOutPacket(CMSG_CHAR_RENAME);
-        outMsg.writeInt32(mRenameId, "char id");
+        outMsg.writeBeingId(mRenameId, "char id");
     }
     else
     {
diff --git a/src/net/eathena/charserverhandler.h b/src/net/eathena/charserverhandler.h
index 6254f9d2c..64968cee4 100644
--- a/src/net/eathena/charserverhandler.h
+++ b/src/net/eathena/charserverhandler.h
@@ -54,7 +54,7 @@ class CharServerHandler final : public MessageHandler,
                           const uint16_t look,
                           const std::vector<int> &stats) const override final;
 
-        void renameCharacter(const int id,
+        void renameCharacter(const BeingId id,
                              const std::string &newName) override final;
 
         void deleteCharacter(Net::Character *const character,
@@ -123,8 +123,8 @@ class CharServerHandler final : public MessageHandler,
     private:
         static std::string mNewName;
         static uint32_t mPinSeed;
-        static uint32_t mPinAccountId;
-        static uint32_t mRenameId;
+        static BeingId mPinAccountId;
+        static BeingId mRenameId;
         static bool mNeedCreatePin;
 };
 
diff --git a/src/net/eathena/chathandler.cpp b/src/net/eathena/chathandler.cpp
index 9db670080..d31afa3c9 100644
--- a/src/net/eathena/chathandler.cpp
+++ b/src/net/eathena/chathandler.cpp
@@ -663,7 +663,7 @@ void ChatHandler::processChatDisplay(Net::MessageIn &msg)
 {
     const int len = msg.readInt16("len") - 17;
     ChatObject *const obj = new ChatObject;
-    obj->ownerId = msg.readInt32("owner account id");
+    obj->ownerId = msg.readBeingId("owner account id");
     obj->chatId = msg.readInt32("chat id");
     obj->maxUsers = msg.readInt16("max users");
     obj->currentUsers = msg.readInt16("current users");
@@ -839,7 +839,7 @@ void ChatHandler::processBeingChat(Net::MessageIn &msg)
 
     BLOCK_START("ChatHandler::processBeingChat")
     int chatMsgLength = msg.readInt16("len") - 8;
-    Being *const being = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const being = actorManager->findBeing(msg.readBeingId("being id"));
 
     if (chatMsgLength <= 0)
     {
@@ -992,7 +992,7 @@ void ChatHandler::processChatRoomAddMember(Net::MessageIn &msg)
 void ChatHandler::processChatRoomSettings(Net::MessageIn &msg)
 {
     const int sz = msg.readInt16("len") - 17;
-    const int ownerId = msg.readInt32("owner id");
+    const BeingId ownerId = msg.readBeingId("owner id");
     const int chatId = msg.readInt32("chat id");
     const uint16_t limit = msg.readInt16("limit");
     msg.readInt16("users");
@@ -1086,7 +1086,7 @@ void ChatHandler::processChatSilence(Net::MessageIn &msg)
 void ChatHandler::processChatTalkieBox(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readString(80, "message");
 }
 
@@ -1094,7 +1094,7 @@ void ChatHandler::processBattleChatMessage(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
     const int sz = msg.readInt16("len") - 24 - 8;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readString(24, "nick");
     msg.readString(sz, "message");
 }
@@ -1103,7 +1103,7 @@ void ChatHandler::processScriptMessage(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
     const int sz = msg.readInt16("len") - 8;
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readString(sz, "message");
 }
 
diff --git a/src/net/eathena/familyhandler.cpp b/src/net/eathena/familyhandler.cpp
index 5b482639f..a21de5ec2 100644
--- a/src/net/eathena/familyhandler.cpp
+++ b/src/net/eathena/familyhandler.cpp
@@ -86,7 +86,7 @@ void FamilyHandler::askForChild(const Being *const being)
         return;
 
     createOutPacket(CMSG_FAMILY_ASK_FOR_CHILD);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void FamilyHandler::processAskForChild(Net::MessageIn &msg)
diff --git a/src/net/eathena/friendshandler.cpp b/src/net/eathena/friendshandler.cpp
index 91f08a205..43634d9fc 100644
--- a/src/net/eathena/friendshandler.cpp
+++ b/src/net/eathena/friendshandler.cpp
@@ -80,7 +80,7 @@ void FriendsHandler::handleMessage(Net::MessageIn &msg)
 void FriendsHandler::processPlayerOnline(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("char id");
     msg.readUInt8("flag");  // 0 - online, 1 - offline
 }
@@ -91,7 +91,7 @@ void FriendsHandler::processFriendsList(Net::MessageIn &msg)
     const int count = (msg.readInt16("size") - 4) / 32;
     for (int f = 0; f < count; f ++)
     {
-        msg.readInt32("account id");
+        msg.readBeingId("account id");
         msg.readInt32("char id");
         msg.readString(24, "name");
     }
@@ -101,7 +101,7 @@ void FriendsHandler::processRequestAck(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
     msg.readInt16("type");
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("char id");
     msg.readString(24, "name");
 }
@@ -109,7 +109,7 @@ void FriendsHandler::processRequestAck(Net::MessageIn &msg)
 void FriendsHandler::processRequest(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("char id");
     msg.readString(24, "name");
 }
@@ -140,7 +140,7 @@ void FriendsHandler::remove(const int accountId, const int charId) const
 void FriendsHandler::processDeletePlayer(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("char id");
 }
 
diff --git a/src/net/eathena/gamehandler.cpp b/src/net/eathena/gamehandler.cpp
index 2f425b52c..7fa94ab48 100644
--- a/src/net/eathena/gamehandler.cpp
+++ b/src/net/eathena/gamehandler.cpp
@@ -125,14 +125,14 @@ void GameHandler::connect()
         }
         else
         {
-            mCharID = 0;
+            mCharID = BeingId_zero;
         }
     }
 
     // Send login infos
     createOutPacket(CMSG_MAP_SERVER_CONNECT);
-    outMsg.writeInt32(token.account_ID, "account id");
-    outMsg.writeInt32(mCharID, "char id");
+    outMsg.writeBeingId(token.account_ID, "account id");
+    outMsg.writeBeingId(mCharID, "char id");
     outMsg.writeInt32(token.session_ID1, "session key1");
     outMsg.writeInt32(0, "tick");
     outMsg.writeInt8(Being::genderToInt(token.sex), "sex");
@@ -180,7 +180,7 @@ void GameHandler::disconnect2() const
 void GameHandler::processMapAccountId(Net::MessageIn &msg)
 {
     // ignored, because we already know local player account id.
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
 }
 
 void GameHandler::processMapLogin(Net::MessageIn &msg)
diff --git a/src/net/eathena/guildhandler.cpp b/src/net/eathena/guildhandler.cpp
index 1a6c29b80..85609581b 100644
--- a/src/net/eathena/guildhandler.cpp
+++ b/src/net/eathena/guildhandler.cpp
@@ -210,7 +210,7 @@ void GuildHandler::handleMessage(Net::MessageIn &msg)
 
 void GuildHandler::processGuildUpdateCoords(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int x = msg.readInt16("x");
     const int y = msg.readInt16("y");
     if (Ea::taGuild)
@@ -241,7 +241,7 @@ void GuildHandler::invite(const std::string &name) const
     if (being)
     {
         createOutPacket(CMSG_GUILD_INVITE);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
         outMsg.writeInt32(0, "unused");
         outMsg.writeInt32(0, "unused");
     }
@@ -253,7 +253,7 @@ void GuildHandler::invite(const Being *const being) const
         return;
 
     createOutPacket(CMSG_GUILD_INVITE);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt32(0, "unused");
     outMsg.writeInt32(0, "unused");
 }
@@ -275,7 +275,7 @@ void GuildHandler::leave(const int guildId) const
 
     createOutPacket(CMSG_GUILD_LEAVE);
     outMsg.writeInt32(guildId, "guild id");
-    outMsg.writeInt32(localPlayer->getId(), "account id");
+    outMsg.writeBeingId(localPlayer->getId(), "account id");
     outMsg.writeInt32(PlayerInfo::getCharId(), "char id");
     outMsg.writeString("", 40, "message");
 }
@@ -288,7 +288,7 @@ void GuildHandler::kick(const GuildMember *restrict const member,
 
     createOutPacket(CMSG_GUILD_EXPULSION);
     outMsg.writeInt32(member->getGuild()->getId(), "guild id");
-    outMsg.writeInt32(member->getID(), "account id");
+    outMsg.writeBeingId(member->getID(), "account id");
     outMsg.writeInt32(member->getCharId(), "char id");
     outMsg.writeString(reason, 40, "message");
 }
@@ -339,7 +339,7 @@ void GuildHandler::changeMemberPostion(const GuildMember *const member,
 
     createOutPacket(CMSG_GUILD_CHANGE_MEMBER_POS);
     outMsg.writeInt16(16, "len");
-    outMsg.writeInt32(member->getID(), "account id");
+    outMsg.writeBeingId(member->getID(), "account id");
     outMsg.writeInt32(member->getCharId(), "char id");
     outMsg.writeInt32(level, "pos");
 }
@@ -396,7 +396,7 @@ void GuildHandler::processGuildPositionInfo(Net::MessageIn &msg)
 
 void GuildHandler::processGuildMemberLogin(Net::MessageIn &msg)
 {
-    const int accountId = msg.readInt32("account id");
+    const BeingId accountId = msg.readBeingId("account id");
     const int charId = msg.readInt32("char id");
     const int online = msg.readInt32("flag");
     const Gender::Type gender = Being::intToGender(static_cast<uint8_t>(
@@ -445,7 +445,7 @@ void GuildHandler::processGuildExpulsionList(Net::MessageIn &msg)
 void GuildHandler::processGuildEmblem(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt32("guild id");
     msg.readInt16("emblem id");
 }
@@ -456,7 +456,7 @@ void GuildHandler::requestAlliance(const Being *const being) const
         return;
 
     createOutPacket(CMSG_GUILD_ALLIANCE_REQUEST);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt32(0, "inviter account id");
     outMsg.writeInt32(0, "inviter char id");
 }
@@ -498,7 +498,7 @@ void GuildHandler::requestOpposition(const Being *const being) const
         return;
 
     createOutPacket(CMSG_GUILD_OPPOSITION);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void GuildHandler::breakGuild(const std::string &name) const
diff --git a/src/net/eathena/homunculushandler.cpp b/src/net/eathena/homunculushandler.cpp
index 2bfe358c2..e2441ac14 100644
--- a/src/net/eathena/homunculushandler.cpp
+++ b/src/net/eathena/homunculushandler.cpp
@@ -127,7 +127,7 @@ void HomunculusHandler::processHomunculusData(Net::MessageIn &msg)
 {
     msg.readUInt8("unused");
     const int cmd = msg.readUInt8("state");
-    const int id = msg.readInt32("homunculus id");
+    const BeingId id = msg.readBeingId("homunculus id");
     Being *const dstBeing = actorManager->findBeing(id);
     const int data = msg.readInt32("data");
     if (!cmd)  // pre init
@@ -243,33 +243,34 @@ void HomunculusHandler::setName(const std::string &name) const
 
 void HomunculusHandler::moveToMaster() const
 {
-    const int id = PlayerInfo::getHomunculusId();
-    if (!id)
+    const BeingId id = PlayerInfo::getHomunculusId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_MOVE_TO_MASTER);
-    outMsg.writeInt32(id, "homunculus id");
+    outMsg.writeBeingId(id, "homunculus id");
 }
 
 void HomunculusHandler::move(const int x, const int y) const
 {
-    const int id = PlayerInfo::getHomunculusId();
-    if (!id)
+    const BeingId id = PlayerInfo::getHomunculusId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_MOVE_TO);
-    outMsg.writeInt32(id, "homunculus id");
+    outMsg.writeBeingId(id, "homunculus id");
     outMsg.writeCoordinates(static_cast<uint16_t>(x),
         static_cast<uint16_t>(y),
         0U, "position");
 }
 
-void HomunculusHandler::attack(const int targetId, const Keep keep) const
+void HomunculusHandler::attack(const BeingId targetId,
+                               const Keep keep) const
 {
-    const int id = PlayerInfo::getHomunculusId();
-    if (!id)
+    const BeingId id = PlayerInfo::getHomunculusId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_ATTACK);
-    outMsg.writeInt32(id, "homunculus id");
-    outMsg.writeInt32(targetId, "target id");
+    outMsg.writeBeingId(id, "homunculus id");
+    outMsg.writeBeingId(targetId, "target id");
     outMsg.writeInt8(static_cast<int8_t>(keep == Keep_true ? 1 : 0), "keep");
 }
 
diff --git a/src/net/eathena/homunculushandler.h b/src/net/eathena/homunculushandler.h
index 5b288eeb6..35955b0ba 100644
--- a/src/net/eathena/homunculushandler.h
+++ b/src/net/eathena/homunculushandler.h
@@ -45,7 +45,8 @@ class HomunculusHandler final : public MessageHandler,
 
         void move(const int x, const int y) const override final;
 
-        void attack(const int targetId, const Keep keep) const override final;
+        void attack(const BeingId targetId,
+                    const Keep keep) const override final;
 
         void feed() const override final;
 
diff --git a/src/net/eathena/inventoryhandler.cpp b/src/net/eathena/inventoryhandler.cpp
index 3781678cd..186bb5fc5 100644
--- a/src/net/eathena/inventoryhandler.cpp
+++ b/src/net/eathena/inventoryhandler.cpp
@@ -489,10 +489,10 @@ void InventoryHandler::processPlayerInventoryAdd(Net::MessageIn &msg)
     msg.readInt16("bind on equip");
 
     const ItemInfo &itemInfo = ItemDB::get(itemId);
-    int floorId;
+    BeingId floorId;
     if (mSentPickups.empty())
     {
-        floorId = 0;
+        floorId = BeingId_zero;
     }
     else
     {
@@ -1107,7 +1107,7 @@ void InventoryHandler::processItemDamaged(Net::MessageIn &msg)
     UNIMPLIMENTEDPACKET;
 
     msg.readInt16("position");
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
 }
 
 void InventoryHandler::processFavoriteItem(Net::MessageIn &msg)
diff --git a/src/net/eathena/itemhandler.cpp b/src/net/eathena/itemhandler.cpp
index 0a1629517..ce5dfadfb 100644
--- a/src/net/eathena/itemhandler.cpp
+++ b/src/net/eathena/itemhandler.cpp
@@ -79,7 +79,7 @@ void ItemHandler::handleMessage(Net::MessageIn &msg)
 
 void ItemHandler::processItemDropped(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     const int itemId = msg.readInt16("item id");
     msg.readInt16("type");
     const uint8_t identify = msg.readUInt8("identify");
diff --git a/src/net/eathena/markethandler.cpp b/src/net/eathena/markethandler.cpp
index 175429cda..12beafd98 100644
--- a/src/net/eathena/markethandler.cpp
+++ b/src/net/eathena/markethandler.cpp
@@ -77,7 +77,7 @@ void MarketHandler::processMarketOpen(Net::MessageIn &msg)
 {
     const int len = (msg.readInt16("len") - 4) / 13;
 
-    mBuyDialog = new BuyDialog(BuyDialog::Market);
+    mBuyDialog = new BuyDialog(fromInt(BuyDialog::Market, BeingId));
     mBuyDialog->postInit();
     mBuyDialog->setMoney(PlayerInfo::getAttribute(Attributes::MONEY));
 
diff --git a/src/net/eathena/mercenaryhandler.cpp b/src/net/eathena/mercenaryhandler.cpp
index ebdba730e..82f7b59c2 100644
--- a/src/net/eathena/mercenaryhandler.cpp
+++ b/src/net/eathena/mercenaryhandler.cpp
@@ -90,7 +90,7 @@ void MercenaryHandler::processMercenaryUpdate(Net::MessageIn &msg)
 void MercenaryHandler::processMercenaryInfo(Net::MessageIn &msg)
 {
     // +++ need create if need mercenary being and update stats
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
     msg.readInt16("atk");
     msg.readInt16("matk");
     msg.readInt16("hit");
@@ -188,33 +188,34 @@ void MercenaryHandler::fire()
 
 void MercenaryHandler::moveToMaster() const
 {
-    const int id = PlayerInfo::getMercenaryId();
-    if (!id)
+    const BeingId id = PlayerInfo::getMercenaryId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_MOVE_TO_MASTER);
-    outMsg.writeInt32(id, "mercenary id");
+    outMsg.writeBeingId(id, "mercenary id");
 }
 
 void MercenaryHandler::move(const int x, const int y) const
 {
-    const int id = PlayerInfo::getMercenaryId();
-    if (!id)
+    const BeingId id = PlayerInfo::getMercenaryId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_MOVE_TO);
-    outMsg.writeInt32(id, "mercenary id");
+    outMsg.writeBeingId(id, "mercenary id");
     outMsg.writeCoordinates(static_cast<uint16_t>(x),
         static_cast<uint16_t>(y),
         0U, "position");
 }
 
-void MercenaryHandler::attack(const int targetId, const Keep keep) const
+void MercenaryHandler::attack(const BeingId targetId,
+                              const Keep keep) const
 {
-    const int id = PlayerInfo::getMercenaryId();
-    if (!id)
+    const BeingId id = PlayerInfo::getMercenaryId();
+    if (id == BeingId_zero)
         return;
     createOutPacket(CMSG_HOMMERC_ATTACK);
-    outMsg.writeInt32(id, "mercenary id");
-    outMsg.writeInt32(targetId, "target id");
+    outMsg.writeBeingId(id, "mercenary id");
+    outMsg.writeBeingId(targetId, "target id");
     outMsg.writeInt8(static_cast<int8_t>(keep == Keep_true ? 1 : 0), "keep");
 }
 
diff --git a/src/net/eathena/mercenaryhandler.h b/src/net/eathena/mercenaryhandler.h
index a24f414ff..643f4ec74 100644
--- a/src/net/eathena/mercenaryhandler.h
+++ b/src/net/eathena/mercenaryhandler.h
@@ -45,7 +45,8 @@ class MercenaryHandler final : public MessageHandler,
 
         void move(const int x, const int y) const override final;
 
-        void attack(const int targetId, const Keep keep) const override final;
+        void attack(const BeingId targetId,
+                    const Keep keep) const override final;
 
         void talk(const std::string &restrict text) const override final;
 
diff --git a/src/net/eathena/messagein.cpp b/src/net/eathena/messagein.cpp
index fda86254a..03b8ddd3a 100644
--- a/src/net/eathena/messagein.cpp
+++ b/src/net/eathena/messagein.cpp
@@ -105,6 +105,11 @@ int32_t MessageIn::readInt32(const char *const str)
     return value;
 }
 
+BeingId MessageIn::readBeingId(const char *const str)
+{
+    return fromInt(readInt32(str), BeingId);
+}
+
 int64_t MessageIn::readInt64(const char *const str)
 {
     int64_t value = -1;
diff --git a/src/net/eathena/messagein.h b/src/net/eathena/messagein.h
index 1a674e129..fb20b6db7 100644
--- a/src/net/eathena/messagein.h
+++ b/src/net/eathena/messagein.h
@@ -54,6 +54,8 @@ class MessageIn final : public Net::MessageIn
 
         int64_t readInt64(const char *const str) override final;
 
+        BeingId readBeingId(const char *const str) override final;
+
         uint16_t readId();
 };
 
diff --git a/src/net/eathena/messageout.cpp b/src/net/eathena/messageout.cpp
index 084db9418..8ecf8e863 100644
--- a/src/net/eathena/messageout.cpp
+++ b/src/net/eathena/messageout.cpp
@@ -83,6 +83,11 @@ void MessageOut::writeInt32(const int32_t value, const char *const str)
     PacketCounters::incOutBytes(4);
 }
 
+void MessageOut::writeBeingId(const BeingId value, const char *const str)
+{
+    writeInt32(toInt(value, int32_t), str);
+}
+
 #define LOBYTE(w)  (static_cast<unsigned char>(w))
 #define HIBYTE(w)  (static_cast<unsigned char>(( \
 static_cast<uint16_t>(w)) >> 8))
diff --git a/src/net/eathena/messageout.h b/src/net/eathena/messageout.h
index 11b124e26..4c0074767 100644
--- a/src/net/eathena/messageout.h
+++ b/src/net/eathena/messageout.h
@@ -56,6 +56,9 @@ class MessageOut final : public Net::MessageOut
         void writeInt32(const int32_t value,
                         const char *const str) override final;
 
+        void writeBeingId(const BeingId value,
+                          const char *const str) override final;
+
         /**
          * Encodes coordinates and direction in 3 bytes.
          */
diff --git a/src/net/eathena/npchandler.cpp b/src/net/eathena/npchandler.cpp
index e5ff89cfb..2c018dad9 100644
--- a/src/net/eathena/npchandler.cpp
+++ b/src/net/eathena/npchandler.cpp
@@ -138,23 +138,23 @@ void NpcHandler::handleMessage(Net::MessageIn &msg)
     mDialog = nullptr;
 }
 
-void NpcHandler::talk(const int npcId) const
+void NpcHandler::talk(const BeingId npcId) const
 {
     createOutPacket(CMSG_NPC_TALK);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt8(0, "unused");
 }
 
-void NpcHandler::nextDialog(const int npcId) const
+void NpcHandler::nextDialog(const BeingId npcId) const
 {
     createOutPacket(CMSG_NPC_NEXT_REQUEST);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
 }
 
-void NpcHandler::closeDialog(const int npcId)
+void NpcHandler::closeDialog(const BeingId npcId)
 {
     createOutPacket(CMSG_NPC_CLOSE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
 
     const NpcDialogs::iterator it = NpcDialog::mNpcDialogs.find(npcId);
     if (it != NpcDialog::mNpcDialogs.end())
@@ -168,44 +168,48 @@ void NpcHandler::closeDialog(const int npcId)
     }
 }
 
-void NpcHandler::listInput(const int npcId, const unsigned char value) const
+void NpcHandler::listInput(const BeingId npcId,
+                           const unsigned char value) const
 {
     createOutPacket(CMSG_NPC_LIST_CHOICE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt8(value, "value");
 }
 
-void NpcHandler::integerInput(const int npcId, const int value) const
+void NpcHandler::integerInput(const BeingId npcId,
+                              const int value) const
 {
     createOutPacket(CMSG_NPC_INT_RESPONSE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt32(value, "value");
 }
 
-void NpcHandler::stringInput(const int npcId, const std::string &value) const
+void NpcHandler::stringInput(const BeingId npcId,
+                             const std::string &value) const
 {
     createOutPacket(CMSG_NPC_STR_RESPONSE);
     outMsg.writeInt16(static_cast<int16_t>(value.length() + 9), "len");
-    outMsg.writeInt32(npcId, "npc ud");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeString(value, static_cast<int>(value.length()), "value");
     outMsg.writeInt8(0, "null byte");
 }
 
-void NpcHandler::buy(const int beingId) const
+void NpcHandler::buy(const BeingId beingId) const
 {
     createOutPacket(CMSG_NPC_BUY_SELL_REQUEST);
-    outMsg.writeInt32(beingId, "npc id");
+    outMsg.writeBeingId(beingId, "npc id");
     outMsg.writeInt8(0, "action");
 }
 
-void NpcHandler::sell(const int beingId) const
+void NpcHandler::sell(const BeingId beingId) const
 {
     createOutPacket(CMSG_NPC_BUY_SELL_REQUEST);
-    outMsg.writeInt32(beingId, "npc id");
+    outMsg.writeBeingId(beingId, "npc id");
     outMsg.writeInt8(1, "action");
 }
 
-void NpcHandler::buyItem(const int beingId A_UNUSED, const int itemId,
+void NpcHandler::buyItem(const BeingId beingId A_UNUSED,
+                         const int itemId,
                          const unsigned char color A_UNUSED,
                          const int amount) const
 {
@@ -215,7 +219,7 @@ void NpcHandler::buyItem(const int beingId A_UNUSED, const int itemId,
     outMsg.writeInt16(static_cast<int16_t>(itemId), "item id");
 }
 
-void NpcHandler::sellItem(const int beingId A_UNUSED,
+void NpcHandler::sellItem(const BeingId beingId A_UNUSED,
                           const int itemId, const int amount) const
 {
     createOutPacket(CMSG_NPC_SELL_REQUEST);
@@ -280,7 +284,7 @@ void NpcHandler::selectAutoSpell(const int skillId) const
     outMsg.writeInt32(static_cast<int16_t>(skillId), "skill id");
 }
 
-int NpcHandler::getNpc(Net::MessageIn &msg)
+BeingId NpcHandler::getNpc(Net::MessageIn &msg)
 {
     if (msg.getId() == SMSG_NPC_CHOICE
         || msg.getId() == SMSG_NPC_MESSAGE
@@ -289,7 +293,7 @@ int NpcHandler::getNpc(Net::MessageIn &msg)
         msg.readInt16("len");
     }
 
-    const int npcId = msg.readInt32("npc id");
+    const BeingId npcId = msg.readBeingId("npc id");
 
     const NpcDialogs::const_iterator diag = NpcDialog::mNpcDialogs.find(npcId);
     mDialog = nullptr;
@@ -378,7 +382,7 @@ void NpcHandler::processArea(Net::MessageIn &msg)
     if (len < 12)
         return;
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("npc id"));
+        msg.readBeingId("npc id"));
     const int area = msg.readInt32("area size");
     if (dstBeing)
         dstBeing->setAreaSize(area);
diff --git a/src/net/eathena/npchandler.h b/src/net/eathena/npchandler.h
index 16e656497..e69366c09 100644
--- a/src/net/eathena/npchandler.h
+++ b/src/net/eathena/npchandler.h
@@ -39,30 +39,32 @@ class NpcHandler final : public MessageHandler, public Ea::NpcHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void talk(const int npcId) const override final;
+        void talk(const BeingId npcId) const override final;
 
-        void nextDialog(const int npcId) const override final;
+        void nextDialog(const BeingId npcId) const override final;
 
-        void closeDialog(const int npcId) override final;
+        void closeDialog(const BeingId npcId) override final;
 
-        void listInput(const int npcId,
+        void listInput(const BeingId npcId,
                        const unsigned char value) const override final;
 
-        void integerInput(const int npcId,
+        void integerInput(const BeingId npcId,
                           const int value) const override final;
 
-        void stringInput(const int npcId,
+        void stringInput(const BeingId npcId,
                          const std::string &value) const override final;
 
-        void buy(const int beingId) const override final;
+        void buy(const BeingId beingId) const override final;
 
-        void sell(const int beingId) const override final;
+        void sell(const BeingId beingId) const override final;
 
-        void buyItem(const int beingId, const int itemId,
+        void buyItem(const BeingId beingId,
+                     const int itemId,
                      const unsigned char color,
                      const int amount) const override final;
 
-        void sellItem(const int beingId, const int itemId,
+        void sellItem(const BeingId beingId,
+                      const int itemId,
                       const int amount) const override final;
 
         void completeProgressBar() const override final;
@@ -79,7 +81,7 @@ class NpcHandler final : public MessageHandler, public Ea::NpcHandler
 
         void refine(const int index) const override final;
 
-        int getNpc(Net::MessageIn &msg) override final;
+        BeingId getNpc(Net::MessageIn &msg) override final;
 
         void identify(const int index) const override final;
 
diff --git a/src/net/eathena/partyhandler.cpp b/src/net/eathena/partyhandler.cpp
index 5f859d12e..d886270ae 100644
--- a/src/net/eathena/partyhandler.cpp
+++ b/src/net/eathena/partyhandler.cpp
@@ -134,7 +134,7 @@ void PartyHandler::invite(const std::string &name) const
     if (being)
     {
         createOutPacket(CMSG_PARTY_INVITE);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
     }
     else
     {
@@ -165,7 +165,7 @@ void PartyHandler::kick(const Being *const being) const
     if (being)
     {
         createOutPacket(CMSG_PARTY_KICK);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
         outMsg.writeString(being->getName(), 24, "player name");
     }
 }
@@ -183,7 +183,7 @@ void PartyHandler::kick(const std::string &name) const
     }
 
     createOutPacket(CMSG_PARTY_KICK);
-    outMsg.writeInt32(m->getID(), "account id");
+    outMsg.writeBeingId(m->getID(), "account id");
     outMsg.writeString(name, 24, "player name");
 }
 
@@ -228,7 +228,7 @@ void PartyHandler::processPartyInvitationStats(Net::MessageIn &msg)
 
 void PartyHandler::processPartyMemberInfo(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const bool leader = msg.readInt32("leader") == 0U;
     const int x = msg.readInt16("x");
     const int y = msg.readInt16("y");
@@ -320,7 +320,7 @@ void PartyHandler::processPartyInfo(Net::MessageIn &msg)
 
     for (int i = 0; i < count; i++)
     {
-        const int id = msg.readInt32("account id");
+        const BeingId id = msg.readBeingId("account id");
         std::string nick = msg.readString(24, "nick");
         std::string map = msg.readString(16, "map name");
         const bool leader = msg.readUInt8("leader") == 0U;
@@ -384,7 +384,7 @@ void PartyHandler::processPartyMessage(Net::MessageIn &msg)
     if (msgLength <= 0)
         return;
 
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     std::string chatMsg = msg.readString(msgLength, "message");
 
     const size_t pos = chatMsg.find(" : ", 0);
@@ -455,7 +455,7 @@ void PartyHandler::changeLeader(const std::string &name) const
     if (!being)
         return;
     createOutPacket(CMSG_PARTY_CHANGE_LEADER);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void PartyHandler::allowInvite(const bool allow) const
@@ -469,7 +469,7 @@ void PartyHandler::processPartyItemPickup(Net::MessageIn &msg)
     UNIMPLIMENTEDPACKET;
     // +++ probably need add option to show pickup notifications
     // in party tab
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt16("item id");
     msg.readUInt8("identify");
     msg.readUInt8("attribute");
@@ -483,9 +483,9 @@ void PartyHandler::processPartyItemPickup(Net::MessageIn &msg)
 void PartyHandler::processPartyLeader(Net::MessageIn &msg)
 {
     PartyMember *const oldMember = Ea::taParty->getMember(
-        msg.readInt32("old leder id"));
+        msg.readBeingId("old leder id"));
     PartyMember *const newMember = Ea::taParty->getMember(
-        msg.readInt32("new leder id"));
+        msg.readBeingId("new leder id"));
     if (oldMember)
         oldMember->setLeader(false);
     if (newMember)
@@ -494,11 +494,23 @@ void PartyHandler::processPartyLeader(Net::MessageIn &msg)
 
 void PartyHandler::processPartyInvited(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const std::string partyName = msg.readString(24, "party name");
 
+    std::string nick;
+
+    if (actorManager)
+    {
+        const Being *const being = actorManager->findBeing(id);
+        if (being)
+        {
+            if (being->getType() == ActorType::Player)
+                nick = being->getName();
+        }
+    }
+
     if (socialWindow)
-        socialWindow->showPartyInvite(partyName, "", id);
+        socialWindow->showPartyInvite(partyName, nick, 0);
 }
 
 }  // namespace EAthena
diff --git a/src/net/eathena/pethandler.cpp b/src/net/eathena/pethandler.cpp
index 71d4d17f2..32f902e80 100644
--- a/src/net/eathena/pethandler.cpp
+++ b/src/net/eathena/pethandler.cpp
@@ -143,7 +143,7 @@ void PetHandler::catchPet(const Being *const being) const
         return;
 
     createOutPacket(CMSG_PET_CATCH);
-    outMsg.writeInt32(being->getId(), "monster id");
+    outMsg.writeBeingId(being->getId(), "monster id");
 }
 
 void PetHandler::sendPetMessage(const int data) const
@@ -160,7 +160,7 @@ void PetHandler::setName(const std::string &name) const
 
 void PetHandler::processPetMessage(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("pet id");
+    const BeingId id = msg.readBeingId("pet id");
     const int data = msg.readInt32("param");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
@@ -228,7 +228,7 @@ void PetHandler::processEggsList(Net::MessageIn &msg)
 void PetHandler::processPetData(Net::MessageIn &msg)
 {
     const int cmd = msg.readUInt8("type");
-    const int id = msg.readInt32("pet id");
+    const BeingId id = msg.readBeingId("pet id");
     Being *const dstBeing = actorManager->findBeing(id);
     const int data = msg.readInt32("data");
     if (!cmd)  // pre init
diff --git a/src/net/eathena/playerhandler.cpp b/src/net/eathena/playerhandler.cpp
index a2bb8b83e..a4e4586f2 100644
--- a/src/net/eathena/playerhandler.cpp
+++ b/src/net/eathena/playerhandler.cpp
@@ -205,10 +205,11 @@ void PlayerHandler::handleMessage(Net::MessageIn &msg)
     }
 }
 
-void PlayerHandler::attack(const int id, const Keep keep) const
+void PlayerHandler::attack(const BeingId id,
+                           const Keep keep) const
 {
     createOutPacket(CMSG_PLAYER_CHANGE_ACT);
-    outMsg.writeInt32(id, "target id");
+    outMsg.writeBeingId(id, "target id");
     if (keep == Keep_true)
         outMsg.writeInt8(7, "action");
     else
@@ -251,7 +252,7 @@ void PlayerHandler::pickUp(const FloorItem *const floorItem) const
         return;
 
     createOutPacket(CMSG_ITEM_PICKUP);
-    outMsg.writeInt32(floorItem->getId(), "object id");
+    outMsg.writeBeingId(floorItem->getId(), "object id");
     EAthena::InventoryHandler *const handler =
         static_cast<EAthena::InventoryHandler*>(inventoryHandler);
     if (handler)
@@ -484,7 +485,7 @@ void PlayerHandler::processPlayerGetExp(Net::MessageIn &msg)
 {
     if (!localPlayer)
         return;
-    const int id = msg.readInt32("player id");
+    const BeingId id = msg.readBeingId("player id");
     const int exp = msg.readInt32("exp amount");
     const int stat = msg.readInt16("exp type");
     const bool fromQuest = msg.readInt16("is from quest");
@@ -538,7 +539,7 @@ void PlayerHandler::processPvpInfo(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
     msg.readInt32("char id");
-    msg.readInt32("account id");
+    msg.readBeingId("account id");
     msg.readInt32("pvp won");
     msg.readInt32("pvp lost");
     msg.readInt32("pvp point");
diff --git a/src/net/eathena/playerhandler.h b/src/net/eathena/playerhandler.h
index 6d7d6a9e1..fc84db326 100644
--- a/src/net/eathena/playerhandler.h
+++ b/src/net/eathena/playerhandler.h
@@ -39,7 +39,8 @@ class PlayerHandler final : public MessageHandler, public Ea::PlayerHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void attack(const int id, const Keep keep) const override final;
+        void attack(const BeingId id,
+                    const Keep keep) const override final;
         void stopAttack() const override final;
         void emote(const uint8_t emoteId) const override final;
 
diff --git a/src/net/eathena/skillhandler.cpp b/src/net/eathena/skillhandler.cpp
index 27f4b136a..fb8cf39e7 100644
--- a/src/net/eathena/skillhandler.cpp
+++ b/src/net/eathena/skillhandler.cpp
@@ -159,12 +159,12 @@ void SkillHandler::handleMessage(Net::MessageIn &msg)
 }
 
 void SkillHandler::useBeing(const int id, const int level,
-                            const int beingId) const
+                            const BeingId beingId) const
 {
     createOutPacket(CMSG_SKILL_USE_BEING);
     outMsg.writeInt16(static_cast<int16_t>(level), "skill level");
     outMsg.writeInt16(static_cast<int16_t>(id), "skill id");
-    outMsg.writeInt32(beingId, "target id");
+    outMsg.writeInt32(toInt(beingId, int), "target id");
 }
 
 void SkillHandler::usePos(const int id, const int level,
@@ -424,7 +424,7 @@ void SkillHandler::processSkillFailed(Net::MessageIn &msg)
 void SkillHandler::processSkillSnap(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     msg.readInt16("x");
     msg.readInt16("y");
 }
@@ -470,7 +470,7 @@ void SkillHandler::processSkillUnitUpdate(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
 }
 
 void SkillHandler::processSkillArrowCreateList(Net::MessageIn &msg)
@@ -496,7 +496,7 @@ void SkillHandler::processSkillDevotionEffect(Net::MessageIn &msg)
 {
     UNIMPLIMENTEDPACKET;
 
-    msg.readInt32("being id");
+    msg.readBeingId("being id");
     for (int f = 0; f < 5; f ++)
         msg.readInt32("devotee id");
     msg.readInt16("range");
diff --git a/src/net/eathena/skillhandler.h b/src/net/eathena/skillhandler.h
index 2cfb4b89f..2cef21777 100644
--- a/src/net/eathena/skillhandler.h
+++ b/src/net/eathena/skillhandler.h
@@ -39,13 +39,16 @@ class SkillHandler final : public MessageHandler, public Ea::SkillHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void useBeing(const int id, const int level,
-                      const int beingId) const override final;
+        void useBeing(const int id,
+                      const int level,
+                      const BeingId beingId) const override final;
 
-        void usePos(const int id, const int level,
+        void usePos(const int id,
+                    const int level,
                     const int x, const int y) const override final;
 
-        void usePos(const int id, const int level,
+        void usePos(const int id,
+                    const int level,
                     const int x, const int y,
                     const std::string &text) const override final;
 
diff --git a/src/net/eathena/tradehandler.cpp b/src/net/eathena/tradehandler.cpp
index 5b1c92ac1..4f036d09b 100644
--- a/src/net/eathena/tradehandler.cpp
+++ b/src/net/eathena/tradehandler.cpp
@@ -116,7 +116,7 @@ void TradeHandler::request(const Being *const being) const
         return;
 
     createOutPacket(CMSG_TRADE_REQUEST);
-    outMsg.writeInt32(being->getId(), "player id");
+    outMsg.writeBeingId(being->getId(), "player id");
 }
 
 void TradeHandler::respond(const bool accept) const
diff --git a/src/net/eathena/vendinghandler.cpp b/src/net/eathena/vendinghandler.cpp
index 9ba6bfc7b..1bbe491cf 100644
--- a/src/net/eathena/vendinghandler.cpp
+++ b/src/net/eathena/vendinghandler.cpp
@@ -116,7 +116,7 @@ void VendingHandler::processOpenReq(Net::MessageIn &msg)
 
 void VendingHandler::processShowBoard(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("owner id");
+    const BeingId id = msg.readBeingId("owner id");
     const std::string shopName = msg.readString(80, "shop name");
     Being *const dstBeing = actorManager->findBeing(id);
     if (dstBeing)
@@ -125,7 +125,7 @@ void VendingHandler::processShowBoard(Net::MessageIn &msg)
 
 void VendingHandler::processHideBoard(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("owner id");
+    const BeingId id = msg.readBeingId("owner id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (dstBeing)
         dstBeing->setSellBoard(std::string());
@@ -139,7 +139,7 @@ void VendingHandler::processHideBoard(Net::MessageIn &msg)
 void VendingHandler::processItemsList(Net::MessageIn &msg)
 {
     const int count = (msg.readInt16("len") - 12) / 22;
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     Being *const being = actorManager->findBeing(id);
     if (!being)
         return;
@@ -223,7 +223,7 @@ void VendingHandler::open(const Being *const being) const
         return;
 
     createOutPacket(CMSG_VENDING_LIST_REQ);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
 }
 
 void VendingHandler::buy(const Being *const being,
@@ -235,7 +235,7 @@ void VendingHandler::buy(const Being *const being,
 
     createOutPacket(CMSG_VENDING_BUY);
     outMsg.writeInt16(12, "len");
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt16(static_cast<int16_t>(amount), "amount");
     outMsg.writeInt16(static_cast<int16_t>(index), "index");
 }
@@ -250,7 +250,7 @@ void VendingHandler::buy2(const Being *const being,
 
     createOutPacket(CMSG_VENDING_BUY2);
     outMsg.writeInt16(16, "len");
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt32(vendId, "vend id");
     outMsg.writeInt16(static_cast<int16_t>(amount), "amount");
     outMsg.writeInt16(static_cast<int16_t>(index), "index");
diff --git a/src/net/homunculushandler.h b/src/net/homunculushandler.h
index c63ed8bba..346fcef49 100644
--- a/src/net/homunculushandler.h
+++ b/src/net/homunculushandler.h
@@ -23,6 +23,7 @@
 
 #ifdef EATHENA_SUPPORT
 
+#include "enums/simpletypes/beingid.h"
 #include "enums/simpletypes/keep.h"
 
 #include <string>
@@ -44,7 +45,8 @@ class HomunculusHandler notfinal
 
         virtual void move(const int x, const int y) const = 0;
 
-        virtual void attack(const int targetId, const Keep keep) const = 0;
+        virtual void attack(const BeingId targetId,
+                            const Keep keep) const = 0;
 
         virtual void feed() const = 0;
 
diff --git a/src/net/mercenaryhandler.h b/src/net/mercenaryhandler.h
index 5c1517975..d39267c5f 100644
--- a/src/net/mercenaryhandler.h
+++ b/src/net/mercenaryhandler.h
@@ -23,6 +23,7 @@
 
 #ifdef EATHENA_SUPPORT
 
+#include "enums/simpletypes/beingid.h"
 #include "enums/simpletypes/keep.h"
 
 #include <string>
@@ -46,7 +47,8 @@ class MercenaryHandler notfinal
 
         virtual void move(const int x, const int y) const = 0;
 
-        virtual void attack(const int targetId, const Keep keep) const = 0;
+        virtual void attack(const BeingId targetId,
+                            const Keep keep) const = 0;
 
         virtual void talk(const std::string &restrict text) const = 0;
 
diff --git a/src/net/messagein.h b/src/net/messagein.h
index cb25a3fde..154b55b3e 100644
--- a/src/net/messagein.h
+++ b/src/net/messagein.h
@@ -23,6 +23,8 @@
 #ifndef NET_MESSAGEIN_H
 #define NET_MESSAGEIN_H
 
+#include "enums/simpletypes/beingid.h"
+
 #include <string>
 
 #include "localconsts.h"
@@ -74,6 +76,8 @@ class MessageIn notfinal
 
         virtual int64_t readInt64(const char *const str) = 0;
 
+        virtual BeingId readBeingId(const char *const str) = 0;
+
         /**
          * Reads a special 3 byte block used by eAthena, containing x and y
          * coordinates and direction.
diff --git a/src/net/messageout.h b/src/net/messageout.h
index 13a4eae1b..048afc70c 100644
--- a/src/net/messageout.h
+++ b/src/net/messageout.h
@@ -23,6 +23,8 @@
 #ifndef NET_MESSAGEOUT_H
 #define NET_MESSAGEOUT_H
 
+#include "enums/simpletypes/beingid.h"
+
 #include <string>
 
 #include "localconsts.h"
@@ -47,13 +49,16 @@ class MessageOut notfinal
                                const char *const str);
 
         /**< Writes a short. */
-        virtual void writeInt16(int16_t value,
+        virtual void writeInt16(const int16_t value,
                                 const char *const str) = 0;
 
         /**< Writes a long. */
-        virtual void writeInt32(int32_t value,
+        virtual void writeInt32(const int32_t value,
                                 const char *const str) = 0;
 
+        virtual void writeBeingId(const BeingId value,
+                                  const char *const str) = 0;
+
         /**
          * Writes a string. If a fixed length is not given (-1), it is stored
          * as a short at the start of the string.
diff --git a/src/net/npchandler.h b/src/net/npchandler.h
index 42eaabb00..83c896d1c 100644
--- a/src/net/npchandler.h
+++ b/src/net/npchandler.h
@@ -27,6 +27,8 @@
 
 #include "enums/being/cookingtype.h"
 
+#include "enums/simpletypes/beingid.h"
+
 #include "localconsts.h"
 
 namespace Net
@@ -40,31 +42,34 @@ class NpcHandler notfinal
         virtual ~NpcHandler()
         { }
 
-        virtual int getNpc(Net::MessageIn &msg) = 0;
+        virtual BeingId getNpc(Net::MessageIn &msg) = 0;
 
-        virtual void talk(const int npcId) const = 0;
+        virtual void talk(const BeingId npcId) const = 0;
 
-        virtual void nextDialog(const int npcId) const = 0;
+        virtual void nextDialog(const BeingId npcId) const = 0;
 
-        virtual void closeDialog(const int npcId) = 0;
+        virtual void closeDialog(const BeingId npcId) = 0;
 
-        virtual void listInput(const int npcId,
+        virtual void listInput(const BeingId npcId,
                                const unsigned char value) const = 0;
 
-        virtual void integerInput(const int npcId, const int value) const = 0;
+        virtual void integerInput(const BeingId npcId,
+                                  const int value) const = 0;
 
-        virtual void stringInput(const int npcId,
+        virtual void stringInput(const BeingId npcId,
                                  const std::string &value) const = 0;
 
-        virtual void buy(const int beingId) const = 0;
+        virtual void buy(const BeingId beingId) const = 0;
 
-        virtual void sell(const int beingId) const = 0;
+        virtual void sell(const BeingId beingId) const = 0;
 
-        virtual void buyItem(const int beingId, const int itemId,
+        virtual void buyItem(const BeingId beingId,
+                             const int itemId,
                              const unsigned char color,
                              const int amount) const = 0;
 
-        virtual void sellItem(const int beingId, const int itemId,
+        virtual void sellItem(const BeingId beingId,
+                              const int itemId,
                               const int amount) const = 0;
 
         virtual void completeProgressBar() const = 0;
diff --git a/src/net/playerhandler.h b/src/net/playerhandler.h
index 44001e7c4..5fde7db54 100644
--- a/src/net/playerhandler.h
+++ b/src/net/playerhandler.h
@@ -27,6 +27,7 @@
 
 #include "enums/being/beingaction.h"
 
+#include "enums/simpletypes/beingid.h"
 #include "enums/simpletypes/keep.h"
 #include "enums/simpletypes/notify.h"
 
@@ -41,7 +42,8 @@ class PlayerHandler notfinal
         virtual ~PlayerHandler()
         { }
 
-        virtual void attack(const int id, const Keep keep) const = 0;
+        virtual void attack(const BeingId id,
+                            const Keep keep) const = 0;
 
         virtual void stopAttack() const = 0;
 
diff --git a/src/net/skillhandler.h b/src/net/skillhandler.h
index 9c9318c66..996101149 100644
--- a/src/net/skillhandler.h
+++ b/src/net/skillhandler.h
@@ -23,6 +23,8 @@
 #ifndef NET_SKILLHANDLER_H
 #define NET_SKILLHANDLER_H
 
+#include "enums/simpletypes/beingid.h"
+
 #include <iosfwd>
 
 #include "localconsts.h"
@@ -35,13 +37,16 @@ class SkillHandler notfinal
         virtual ~SkillHandler()
         { }
 
-        virtual void useBeing(const int id, const int level,
-                              const int beingId) const = 0;
+        virtual void useBeing(const int id,
+                              const int level,
+                              const BeingId beingId) const = 0;
 
-        virtual void usePos(const int id, const int level,
+        virtual void usePos(const int id,
+                            const int level,
                             const int x, const int y) const = 0;
 
-        virtual void usePos(const int id, const int level,
+        virtual void usePos(const int id,
+                            const int level,
                             const int x, const int y,
                             const std::string &text) const = 0;
 
diff --git a/src/net/tmwa/adminhandler.cpp b/src/net/tmwa/adminhandler.cpp
index 216a33cb7..64638ad46 100644
--- a/src/net/tmwa/adminhandler.cpp
+++ b/src/net/tmwa/adminhandler.cpp
@@ -86,10 +86,10 @@ void AdminHandler::hide(const bool h A_UNUSED) const
     outMsg.writeInt32(0, "unused");
 }
 
-void AdminHandler::kick(const int playerId) const
+void AdminHandler::kick(const BeingId playerId) const
 {
     createOutPacket(CMSG_ADMIN_KICK);
-    outMsg.writeInt32(playerId, "account id");
+    outMsg.writeBeingId(playerId, "account id");
 }
 
 void AdminHandler::kickAll() const
diff --git a/src/net/tmwa/adminhandler.h b/src/net/tmwa/adminhandler.h
index 35a4ccead..a98d6d850 100644
--- a/src/net/tmwa/adminhandler.h
+++ b/src/net/tmwa/adminhandler.h
@@ -45,7 +45,7 @@ class AdminHandler final : public MessageHandler, public Ea::AdminHandler
 
         void hide(const bool h) const override final;
 
-        void kick(const int playerId) const override final;
+        void kick(const BeingId playerId) const override final;
 
         void kickAll() const override final;
 
diff --git a/src/net/tmwa/beinghandler.cpp b/src/net/tmwa/beinghandler.cpp
index 20ab2cffa..0191953a4 100644
--- a/src/net/tmwa/beinghandler.cpp
+++ b/src/net/tmwa/beinghandler.cpp
@@ -101,10 +101,10 @@ BeingHandler::BeingHandler(const bool enableSync) :
     beingHandler = this;
 }
 
-void BeingHandler::requestNameById(const int id) const
+void BeingHandler::requestNameById(const BeingId id) const
 {
     createOutPacket(CMSG_NAME_REQUEST);
-    outMsg.writeInt32(id, "being id");
+    outMsg.writeBeingId(id, "being id");
 }
 
 void BeingHandler::handleMessage(Net::MessageIn &msg)
@@ -267,7 +267,7 @@ void BeingHandler::processBeingChangeLook(Net::MessageIn &msg)
     }
 
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("being id"));
+        msg.readBeingId("being id"));
 
     const uint8_t type = msg.readUInt8("type");
     const int16_t id = static_cast<int16_t>(msg.readUInt8("id"));
@@ -292,7 +292,7 @@ void BeingHandler::processBeingChangeLook2(Net::MessageIn &msg)
     }
 
     Being *const dstBeing = actorManager->findBeing(
-        msg.readInt32("being id"));
+        msg.readBeingId("being id"));
 
     const uint8_t type = msg.readUInt8("type");
     int id2 = 0;
@@ -427,7 +427,7 @@ void BeingHandler::processPlayerUpdate1(Net::MessageIn &msg)
     }
 
     // An update about a player, potentially including movement.
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
     uint32_t statusEffects = msg.readInt16("opt2");
@@ -435,7 +435,7 @@ void BeingHandler::processPlayerUpdate1(Net::MessageIn &msg)
         << 16;
     const int16_t job = msg.readInt16("job");
     int disguiseId = 0;
-    if (id < 110000000 && job >= 1000)
+    if (toInt(id, int) < 110000000 && job >= 1000)
         disguiseId = job;
 
     Being *dstBeing = actorManager->findBeing(id);
@@ -579,7 +579,7 @@ void BeingHandler::processPlayerUpdate2(Net::MessageIn &msg)
     }
 
     // An update about a player, potentially including movement.
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
     uint32_t statusEffects = msg.readInt16("opt2");
@@ -587,7 +587,7 @@ void BeingHandler::processPlayerUpdate2(Net::MessageIn &msg)
         << 16;
     const int16_t job = msg.readInt16("job");
     int disguiseId = 0;
-    if (id < 110000000 && job >= 1000)
+    if (toInt(id, int) < 110000000 && job >= 1000)
         disguiseId = job;
 
     Being *dstBeing = actorManager->findBeing(id);
@@ -727,7 +727,7 @@ void BeingHandler::processPlayerMove(Net::MessageIn &msg)
     }
 
     // An update about a player, potentially including movement.
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
     uint32_t statusEffects = msg.readInt16("opt2");
@@ -735,7 +735,7 @@ void BeingHandler::processPlayerMove(Net::MessageIn &msg)
         << 16;
     const int16_t job = msg.readInt16("job");
     int disguiseId = 0;
-    if (id < 110000000 && job >= 1000)
+    if (toInt(id, int) < 110000000 && job >= 1000)
         disguiseId = job;
 
     Being *dstBeing = actorManager->findBeing(id);
@@ -904,15 +904,15 @@ void BeingHandler::processBeingVisible(Net::MessageIn &msg)
         return;
     }
 
-    int spawnId;
+    BeingId spawnId;
 
     // Information about a being in range
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     if (id == mSpawnId)
         spawnId = mSpawnId;
     else
-        spawnId = 0;
-    mSpawnId = 0;
+        spawnId = BeingId_zero;
+    mSpawnId = BeingId_zero;
     int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
     uint32_t statusEffects = msg.readInt16("opt2");
@@ -936,7 +936,7 @@ void BeingHandler::processBeingVisible(Net::MessageIn &msg)
     {
         // Being with id >= 110000000 and job 0 are better
         // known as ghosts, so don't create those.
-        if (job == 0 && id >= 110000000)
+        if (job == 0 && toInt(id, int) >= 110000000)
         {
             BLOCK_END("BeingHandler::processBeingVisibleOrMove")
             return;
@@ -969,7 +969,7 @@ void BeingHandler::processBeingVisible(Net::MessageIn &msg)
     if (dstBeing->getType() == ActorType::Player)
         dstBeing->setMoveTime();
 
-    if (spawnId)
+    if (spawnId != BeingId_zero)
     {
         dstBeing->setAction(BeingAction::SPAWN, 0);
     }
@@ -1111,15 +1111,15 @@ void BeingHandler::processBeingMove(Net::MessageIn &msg)
         return;
     }
 
-    int spawnId;
+    BeingId spawnId;
 
     // Information about a being in range
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     if (id == mSpawnId)
         spawnId = mSpawnId;
     else
-        spawnId = 0;
-    mSpawnId = 0;
+        spawnId = BeingId_zero;
+    mSpawnId = BeingId_zero;
     int16_t speed = msg.readInt16("speed");
     const uint16_t stunMode = msg.readInt16("opt1");
     uint32_t statusEffects = msg.readInt16("opt2");
@@ -1143,7 +1143,7 @@ void BeingHandler::processBeingMove(Net::MessageIn &msg)
     {
         // Being with id >= 110000000 and job 0 are better
         // known as ghosts, so don't create those.
-        if (job == 0 && id >= 110000000)
+        if (job == 0 && toInt(id, int) >= 110000000)
         {
             BLOCK_END("BeingHandler::processBeingVisibleOrMove")
             return;
@@ -1176,7 +1176,7 @@ void BeingHandler::processBeingMove(Net::MessageIn &msg)
     if (dstBeing->getType() == ActorType::Player)
         dstBeing->setMoveTime();
 
-    if (spawnId)
+    if (spawnId != BeingId_zero)
         dstBeing->setAction(BeingAction::SPAWN, 0);
 
     // Prevent division by 0 when calculating frame
@@ -1296,7 +1296,7 @@ void BeingHandler::processBeingSpawn(Net::MessageIn &msg)
 {
     BLOCK_START("BeingHandler::processBeingSpawn")
     // skipping this packet
-    mSpawnId = msg.readInt32("being id");
+    mSpawnId = msg.readBeingId("being id");
     msg.readInt16("speed");
     msg.readInt16("opt1");
     msg.readInt16("opt2");
@@ -1328,7 +1328,7 @@ void BeingHandler::processBeingStatusChange(Net::MessageIn &msg)
 
     // Status change
     const uint16_t status = msg.readInt16("status");
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     const Enable flag = fromBool(
         msg.readUInt8("flag: 0: stop, 1: start"), Enable);
 
@@ -1352,7 +1352,7 @@ void BeingHandler::processBeingMove2(Net::MessageIn &msg)
       * later versions of eAthena for both mobs and
       * players
       */
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     /*
       * This packet doesn't have enough info to actually
@@ -1387,7 +1387,7 @@ void BeingHandler::processBeingChangeDirection(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     if (!dstBeing)
     {
@@ -1470,7 +1470,7 @@ void BeingHandler::processPlaterStatusChange(Net::MessageIn &msg)
     }
 
     // Change in players' flags
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
         return;
@@ -1499,7 +1499,7 @@ void BeingHandler::processBeingResurrect(Net::MessageIn &msg)
 
     // A being changed mortality status
 
-    const int id = msg.readInt32("being id");
+    const BeingId id = msg.readBeingId("being id");
     Being *const dstBeing = actorManager->findBeing(id);
     if (!dstBeing)
     {
@@ -1525,7 +1525,7 @@ void BeingHandler::processPlayerGuilPartyInfo(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
 
     if (dstBeing)
     {
@@ -1562,7 +1562,7 @@ void BeingHandler::processBeingSelfEffect(Net::MessageIn &msg)
         return;
     }
 
-    const int id = static_cast<uint32_t>(msg.readInt32("being id"));
+    const BeingId id = msg.readBeingId("being id");
     Being *const being = actorManager->findBeing(id);
     if (!being)
     {
@@ -1598,7 +1598,7 @@ void BeingHandler::processIpResponse(Net::MessageIn &msg)
         return;
     }
 
-    Being *const dstBeing = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const dstBeing = actorManager->findBeing(msg.readBeingId("being id"));
     if (dstBeing)
         dstBeing->setIp(ipToString(msg.readInt32("ip address")));
     BLOCK_END("BeingHandler::processIpResponse")
diff --git a/src/net/tmwa/beinghandler.h b/src/net/tmwa/beinghandler.h
index 64678939b..20badffe0 100644
--- a/src/net/tmwa/beinghandler.h
+++ b/src/net/tmwa/beinghandler.h
@@ -39,7 +39,7 @@ class BeingHandler final : public MessageHandler, public Ea::BeingHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void requestNameById(const int id) const override final;
+        void requestNameById(const BeingId id) const override final;
 
         void undress(Being *const being) const override final;
 
diff --git a/src/net/tmwa/charserverhandler.cpp b/src/net/tmwa/charserverhandler.cpp
index 970d6a9c6..f3a8ab0c6 100644
--- a/src/net/tmwa/charserverhandler.cpp
+++ b/src/net/tmwa/charserverhandler.cpp
@@ -141,7 +141,7 @@ void CharServerHandler::readPlayerData(Net::MessageIn &msg,
         static_cast<LoginHandler*>(loginHandler)->getToken();
 
     LocalPlayer *const tempPlayer = new LocalPlayer(
-        msg.readInt32("account id"), 0);
+        msg.readBeingId("account id"), 0);
     tempPlayer->setGender(token.sex);
 
     PlayerInfoBackend &data = character->data;
@@ -288,7 +288,7 @@ void CharServerHandler::deleteCharacter(Net::Character *const character,
     mSelectedCharacter = character;
 
     createOutPacket(CMSG_CHAR_DELETE);
-    outMsg.writeInt32(mSelectedCharacter->dummy->getId(), "id?");
+    outMsg.writeBeingId(mSelectedCharacter->dummy->getId(), "id?");
     outMsg.writeString("a@a.com", 40, "email");
 }
 
@@ -310,7 +310,7 @@ void CharServerHandler::connect()
     mNetwork->disconnect();
     mNetwork->connect(charServer);
     createOutPacket(CMSG_CHAR_SERVER_CONNECT);
-    outMsg.writeInt32(token.account_ID, "account id");
+    outMsg.writeBeingId(token.account_ID, "account id");
     outMsg.writeInt32(token.session_ID1, "session id1");
     outMsg.writeInt32(token.session_ID2, "session id2");
     // [Fate] The next word is unused by the old char server, so we squeeze in
@@ -502,7 +502,7 @@ void CharServerHandler::processCharCreate2(Net::MessageIn &msg)
     BLOCK_END("CharServerHandler::processCharCreate2")
 }
 
-void CharServerHandler::renameCharacter(const int id A_UNUSED,
+void CharServerHandler::renameCharacter(const BeingId id A_UNUSED,
                                         const std::string &newName A_UNUSED)
 {
 }
diff --git a/src/net/tmwa/charserverhandler.h b/src/net/tmwa/charserverhandler.h
index 20a162eb1..2d73d5a22 100644
--- a/src/net/tmwa/charserverhandler.h
+++ b/src/net/tmwa/charserverhandler.h
@@ -57,7 +57,7 @@ class CharServerHandler final : public MessageHandler,
         void deleteCharacter(Net::Character *const character,
                              const std::string &email) override final;
 
-        void renameCharacter(const int id,
+        void renameCharacter(const BeingId id,
                              const std::string &newName) override final;
 
         void switchCharacter() const override final;
diff --git a/src/net/tmwa/chathandler.cpp b/src/net/tmwa/chathandler.cpp
index ab8036c8c..ed3a1318f 100644
--- a/src/net/tmwa/chathandler.cpp
+++ b/src/net/tmwa/chathandler.cpp
@@ -615,7 +615,7 @@ void ChatHandler::processBeingChat(Net::MessageIn &msg)
     BLOCK_START("ChatHandler::processBeingChat")
     const bool channels = msg.getId() == SMSG_BEING_CHAT2;
     int chatMsgLength = msg.readInt16("len") - 8;
-    Being *const being = actorManager->findBeing(msg.readInt32("being id"));
+    Being *const being = actorManager->findBeing(msg.readBeingId("being id"));
     if (!being)
     {
         BLOCK_END("ChatHandler::processBeingChat")
diff --git a/src/net/tmwa/gamehandler.cpp b/src/net/tmwa/gamehandler.cpp
index f804b61f2..83bc6e966 100644
--- a/src/net/tmwa/gamehandler.cpp
+++ b/src/net/tmwa/gamehandler.cpp
@@ -113,14 +113,14 @@ void GameHandler::connect()
         }
         else
         {
-            mCharID = 0;
+            mCharID = BeingId_zero;
         }
     }
 
     // Send login infos
     createOutPacket(CMSG_MAP_SERVER_CONNECT);
-    outMsg.writeInt32(token.account_ID, "account id");
-    outMsg.writeInt32(mCharID, "char id");
+    outMsg.writeBeingId(token.account_ID, "account id");
+    outMsg.writeBeingId(mCharID, "char id");
     outMsg.writeInt32(token.session_ID1, "session id1");
     outMsg.writeInt32(token.session_ID2, "session id2");
     outMsg.writeInt8(Being::genderToInt(token.sex), "gender");
diff --git a/src/net/tmwa/guildhandler.cpp b/src/net/tmwa/guildhandler.cpp
index f58f873a4..c552cfaef 100644
--- a/src/net/tmwa/guildhandler.cpp
+++ b/src/net/tmwa/guildhandler.cpp
@@ -222,7 +222,7 @@ void GuildHandler::invite(const std::string &name) const
     if (being)
     {
         createOutPacket(CMSG_GUILD_INVITE);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
         outMsg.writeInt32(0, "unused");
         outMsg.writeInt32(0, "unused");
     }
@@ -234,7 +234,7 @@ void GuildHandler::invite(const Being *const being) const
         return;
 
     createOutPacket(CMSG_GUILD_INVITE);
-    outMsg.writeInt32(being->getId(), "account id");
+    outMsg.writeBeingId(being->getId(), "account id");
     outMsg.writeInt32(0, "unused");
     outMsg.writeInt32(0, "unused");
 }
@@ -255,7 +255,7 @@ void GuildHandler::leave(const int guildId) const
 
     createOutPacket(CMSG_GUILD_LEAVE);
     outMsg.writeInt32(guildId, "guild id");
-    outMsg.writeInt32(localPlayer->getId(), "account id");
+    outMsg.writeBeingId(localPlayer->getId(), "account id");
     outMsg.writeInt32(PlayerInfo::getCharId(), "char id");
     outMsg.writeString("", 40, "message");
 }
@@ -268,7 +268,7 @@ void GuildHandler::kick(const GuildMember *restrict const member,
 
     createOutPacket(CMSG_GUILD_EXPULSION);
     outMsg.writeInt32(member->getGuild()->getId(), "guild id");
-    outMsg.writeInt32(member->getID(), "account id");
+    outMsg.writeBeingId(member->getID(), "account id");
     outMsg.writeInt32(member->getCharId(), "char id");
     outMsg.writeString(reason, 40, "message");
 }
@@ -318,7 +318,7 @@ void GuildHandler::changeMemberPostion(const GuildMember *const member,
 
     createOutPacket(CMSG_GUILD_CHANGE_MEMBER_POS);
     outMsg.writeInt16(16, "len");
-    outMsg.writeInt32(member->getID(), "account id");
+    outMsg.writeBeingId(member->getID(), "account id");
     outMsg.writeInt32(member->getCharId(), "char id");
     outMsg.writeInt32(level, "position");
 }
@@ -379,7 +379,7 @@ void GuildHandler::processGuildPositionInfo(Net::MessageIn &msg)
 
 void GuildHandler::processGuildMemberLogin(Net::MessageIn &msg)
 {
-    const int accountId = msg.readInt32("account id");
+    const BeingId accountId = msg.readBeingId("account id");
     const int charId = msg.readInt32("char id");
     const int online = msg.readInt32("flag");
     if (Ea::taGuild)
diff --git a/src/net/tmwa/guildmanager.cpp b/src/net/tmwa/guildmanager.cpp
index 7931087a9..9b584f14a 100644
--- a/src/net/tmwa/guildmanager.cpp
+++ b/src/net/tmwa/guildmanager.cpp
@@ -201,7 +201,8 @@ void GuildManager::updateList()
                 const int status = atoi(name.substr(sz - 1).c_str());
 
                 name = name.substr(0, sz - 1);
-                GuildMember *const m = guild->addMember(i, 0, name);
+                GuildMember *const m = guild->addMember(
+                    fromInt(i, BeingId), 0, name);
                 if (m)
                 {
                     m->setOnline(status & 1);
diff --git a/src/net/tmwa/homunculushandler.cpp b/src/net/tmwa/homunculushandler.cpp
index 8ffbb6ed4..1a0a89077 100644
--- a/src/net/tmwa/homunculushandler.cpp
+++ b/src/net/tmwa/homunculushandler.cpp
@@ -54,7 +54,7 @@ void HomunculusHandler::move(const int x A_UNUSED, const int y A_UNUSED) const
 {
 }
 
-void HomunculusHandler::attack(const int targetId A_UNUSED,
+void HomunculusHandler::attack(const BeingId targetId A_UNUSED,
                                const Keep keep A_UNUSED) const
 {
 }
diff --git a/src/net/tmwa/homunculushandler.h b/src/net/tmwa/homunculushandler.h
index 9aec1eed6..a54079382 100644
--- a/src/net/tmwa/homunculushandler.h
+++ b/src/net/tmwa/homunculushandler.h
@@ -46,7 +46,8 @@ class HomunculusHandler final : public MessageHandler,
 
         void move(const int x, const int y) const override final;
 
-        void attack(const int targetId, const Keep keep) const override final;
+        void attack(const BeingId targetId,
+                    const Keep keep) const override final;
 
         void feed() const override final;
 
diff --git a/src/net/tmwa/inventoryhandler.cpp b/src/net/tmwa/inventoryhandler.cpp
index 28db6fa69..d1b7014f3 100644
--- a/src/net/tmwa/inventoryhandler.cpp
+++ b/src/net/tmwa/inventoryhandler.cpp
@@ -348,10 +348,10 @@ void InventoryHandler::processPlayerInventoryAdd(Net::MessageIn &msg)
 
     const ItemInfo &itemInfo = ItemDB::get(itemId);
     const unsigned char err = msg.readUInt8("status");
-    int floorId;
+    BeingId floorId;
     if (mSentPickups.empty())
     {
-        floorId = 0;
+        floorId = BeingId_zero;
     }
     else
     {
diff --git a/src/net/tmwa/itemhandler.cpp b/src/net/tmwa/itemhandler.cpp
index 0e74172db..7ad3f733a 100644
--- a/src/net/tmwa/itemhandler.cpp
+++ b/src/net/tmwa/itemhandler.cpp
@@ -70,7 +70,7 @@ void ItemHandler::handleMessage(Net::MessageIn &msg)
 
 void ItemHandler::processItemDropped(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("item object id");
+    const BeingId id = msg.readBeingId("item object id");
     const int itemId = msg.readInt16("item id");
     const uint8_t identify = msg.readUInt8("identify");
     const int x = msg.readInt16("x");
diff --git a/src/net/tmwa/mercenaryhandler.cpp b/src/net/tmwa/mercenaryhandler.cpp
index aa71c7f69..7b39823f3 100644
--- a/src/net/tmwa/mercenaryhandler.cpp
+++ b/src/net/tmwa/mercenaryhandler.cpp
@@ -58,7 +58,7 @@ void MercenaryHandler::move(const int x A_UNUSED, const int y A_UNUSED) const
 {
 }
 
-void MercenaryHandler::attack(const int targetId A_UNUSED,
+void MercenaryHandler::attack(const BeingId targetId A_UNUSED,
                               const Keep keep A_UNUSED) const
 {
 }
diff --git a/src/net/tmwa/mercenaryhandler.h b/src/net/tmwa/mercenaryhandler.h
index f2fe3ecae..eea2a19a2 100644
--- a/src/net/tmwa/mercenaryhandler.h
+++ b/src/net/tmwa/mercenaryhandler.h
@@ -48,7 +48,8 @@ class MercenaryHandler final : public MessageHandler,
 
         void move(const int x, const int y) const override final;
 
-        void attack(const int targetId, const Keep keep) const override final;
+        void attack(const BeingId targetId,
+                    const Keep keep) const override final;
 
         void talk(const std::string &restrict text) const override final;
 
diff --git a/src/net/tmwa/messagein.cpp b/src/net/tmwa/messagein.cpp
index b200729f6..3bb66c6f2 100644
--- a/src/net/tmwa/messagein.cpp
+++ b/src/net/tmwa/messagein.cpp
@@ -105,6 +105,11 @@ int32_t MessageIn::readInt32(const char *const str)
     return value;
 }
 
+BeingId MessageIn::readBeingId(const char *const str)
+{
+    return fromInt(readInt32(str), BeingId);
+}
+
 int64_t MessageIn::readInt64(const char *const str)
 {
     int64_t value = -1;
diff --git a/src/net/tmwa/messagein.h b/src/net/tmwa/messagein.h
index ef542bab2..7d27b1188 100644
--- a/src/net/tmwa/messagein.h
+++ b/src/net/tmwa/messagein.h
@@ -54,6 +54,8 @@ class MessageIn final : public Net::MessageIn
 
         int64_t readInt64(const char *const str) override final;
 
+        BeingId readBeingId(const char *const str) override final;
+
         uint16_t readId();
 };
 
diff --git a/src/net/tmwa/messageout.cpp b/src/net/tmwa/messageout.cpp
index 66379ffda..c0cc0321d 100644
--- a/src/net/tmwa/messageout.cpp
+++ b/src/net/tmwa/messageout.cpp
@@ -83,6 +83,11 @@ void MessageOut::writeInt32(const int32_t value, const char *const str)
     PacketCounters::incOutBytes(4);
 }
 
+void MessageOut::writeBeingId(const BeingId value, const char *const str)
+{
+    writeInt32(toInt(value, int32_t), str);
+}
+
 #define LOBYTE(w)  (static_cast<unsigned char>(w))
 #define HIBYTE(w)  (static_cast<unsigned char>(( \
 static_cast<uint16_t>(w)) >> 8U))
diff --git a/src/net/tmwa/messageout.h b/src/net/tmwa/messageout.h
index c6aa522cc..c83643c38 100644
--- a/src/net/tmwa/messageout.h
+++ b/src/net/tmwa/messageout.h
@@ -56,6 +56,9 @@ class MessageOut final : public Net::MessageOut
         void writeInt32(const int32_t value,
                         const char *const str) override final;
 
+        void writeBeingId(const BeingId value,
+                          const char *const str) override final;
+
         /**
          * Encodes coordinates and direction in 3 bytes.
          */
diff --git a/src/net/tmwa/npchandler.cpp b/src/net/tmwa/npchandler.cpp
index 3fd1fed60..b3187687c 100644
--- a/src/net/tmwa/npchandler.cpp
+++ b/src/net/tmwa/npchandler.cpp
@@ -106,23 +106,23 @@ void NpcHandler::handleMessage(Net::MessageIn &msg)
     BLOCK_END("NpcHandler::handleMessage")
 }
 
-void NpcHandler::talk(const int npcId) const
+void NpcHandler::talk(const BeingId npcId) const
 {
     createOutPacket(CMSG_NPC_TALK);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt8(0, "unused");
 }
 
-void NpcHandler::nextDialog(const int npcId) const
+void NpcHandler::nextDialog(const BeingId npcId) const
 {
     createOutPacket(CMSG_NPC_NEXT_REQUEST);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
 }
 
-void NpcHandler::closeDialog(const int npcId)
+void NpcHandler::closeDialog(const BeingId npcId)
 {
     createOutPacket(CMSG_NPC_CLOSE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
 
     const NpcDialogs::iterator it = NpcDialog::mNpcDialogs.find(npcId);
     if (it != NpcDialog::mNpcDialogs.end())
@@ -136,45 +136,50 @@ void NpcHandler::closeDialog(const int npcId)
     }
 }
 
-void NpcHandler::listInput(const int npcId, const unsigned char value) const
+void NpcHandler::listInput(const BeingId npcId,
+                           const unsigned char value) const
 {
     createOutPacket(CMSG_NPC_LIST_CHOICE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt8(value, "value");
 }
 
-void NpcHandler::integerInput(const int npcId, const int value) const
+void NpcHandler::integerInput(const BeingId npcId,
+                              const int value) const
 {
     createOutPacket(CMSG_NPC_INT_RESPONSE);
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeInt32(value, "value");
 }
 
-void NpcHandler::stringInput(const int npcId, const std::string &value) const
+void NpcHandler::stringInput(const BeingId npcId,
+                             const std::string &value) const
 {
     createOutPacket(CMSG_NPC_STR_RESPONSE);
     outMsg.writeInt16(static_cast<int16_t>(value.length() + 9), "len");
-    outMsg.writeInt32(npcId, "npc id");
+    outMsg.writeBeingId(npcId, "npc id");
     outMsg.writeString(value, static_cast<int>(value.length()), "value");
     outMsg.writeInt8(0, "null byte");
 }
 
-void NpcHandler::buy(const int beingId) const
+void NpcHandler::buy(const BeingId beingId) const
 {
     createOutPacket(CMSG_NPC_BUY_SELL_REQUEST);
-    outMsg.writeInt32(beingId, "npc id");
+    outMsg.writeBeingId(beingId, "npc id");
     outMsg.writeInt8(0, "action");
 }
 
-void NpcHandler::sell(const int beingId) const
+void NpcHandler::sell(const BeingId beingId) const
 {
     createOutPacket(CMSG_NPC_BUY_SELL_REQUEST);
-    outMsg.writeInt32(beingId, "npc id");
+    outMsg.writeBeingId(beingId, "npc id");
     outMsg.writeInt8(1, "action");
 }
 
-void NpcHandler::buyItem(const int beingId A_UNUSED, const int itemId,
-                         const unsigned char color, const int amount) const
+void NpcHandler::buyItem(const BeingId beingId A_UNUSED,
+                         const int itemId,
+                         const unsigned char color,
+                         const int amount) const
 {
     createOutPacket(CMSG_NPC_BUY_REQUEST);
     if (serverFeatures->haveItemColors())
@@ -193,7 +198,7 @@ void NpcHandler::buyItem(const int beingId A_UNUSED, const int itemId,
     }
 }
 
-void NpcHandler::sellItem(const int beingId A_UNUSED,
+void NpcHandler::sellItem(const BeingId beingId A_UNUSED,
                           const int itemId,
                           const int amount) const
 {
@@ -242,7 +247,7 @@ void NpcHandler::selectAutoSpell(const int skillId A_UNUSED) const
 {
 }
 
-int NpcHandler::getNpc(Net::MessageIn &msg)
+BeingId NpcHandler::getNpc(Net::MessageIn &msg)
 {
     if (msg.getId() == SMSG_NPC_CHOICE
         || msg.getId() == SMSG_NPC_MESSAGE
@@ -251,7 +256,7 @@ int NpcHandler::getNpc(Net::MessageIn &msg)
         msg.readInt16("len");
     }
 
-    const int npcId = msg.readInt32("npc id");
+    const BeingId npcId = msg.readBeingId("npc id");
 
     const NpcDialogs::const_iterator diag = NpcDialog::mNpcDialogs.find(npcId);
     mDialog = nullptr;
diff --git a/src/net/tmwa/npchandler.h b/src/net/tmwa/npchandler.h
index f8baff5d3..c4880ac15 100644
--- a/src/net/tmwa/npchandler.h
+++ b/src/net/tmwa/npchandler.h
@@ -39,35 +39,37 @@ class NpcHandler final : public MessageHandler, public Ea::NpcHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void talk(const int npcId) const override final;
+        void talk(const BeingId npcId) const override final;
 
-        void nextDialog(const int npcId) const override final;
+        void nextDialog(const BeingId npcId) const override final;
 
-        void closeDialog(const int npcId) override final;
+        void closeDialog(const BeingId npcId) override final;
 
-        void listInput(const int npcId,
+        void listInput(const BeingId npcId,
                        const unsigned char value) const override final;
 
-        void integerInput(const int npcId,
+        void integerInput(const BeingId npcId,
                           const int value) const override final;
 
-        void stringInput(const int npcId,
+        void stringInput(const BeingId npcId,
                          const std::string &value) const override final;
 
-        void buy(const int beingId) const override final;
+        void buy(const BeingId beingId) const override final;
 
-        void sell(const int beingId) const override final;
+        void sell(const BeingId beingId) const override final;
 
-        void buyItem(const int beingId, const int itemId,
+        void buyItem(const BeingId beingId,
+                     const int itemId,
                      const unsigned char color,
                      const int amount) const override final;
 
-        void sellItem(const int beingId, const int itemId,
+        void sellItem(const BeingId beingId,
+                      const int itemId,
                       const int amount) const override final;
 
         void completeProgressBar() const override final;
 
-        int getNpc(Net::MessageIn &msg) override final;
+        BeingId getNpc(Net::MessageIn &msg) override final;
 
         void produceMix(const int nameId,
                         const int materialId1,
diff --git a/src/net/tmwa/partyhandler.cpp b/src/net/tmwa/partyhandler.cpp
index 6f8787be4..8bb143d75 100644
--- a/src/net/tmwa/partyhandler.cpp
+++ b/src/net/tmwa/partyhandler.cpp
@@ -128,7 +128,7 @@ void PartyHandler::invite(const std::string &name) const
     if (being)
     {
         createOutPacket(CMSG_PARTY_INVITE);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
     }
 }
 
@@ -139,7 +139,7 @@ void PartyHandler::inviteResponse(const std::string &inviter A_UNUSED,
     if (localPlayer)
     {
         createOutPacket(CMSG_PARTY_INVITED);
-        outMsg.writeInt32(localPlayer->getId(), "account id");
+        outMsg.writeBeingId(localPlayer->getId(), "account id");
         outMsg.writeInt32(accept ? 1 : 0, "accept");
     }
 }
@@ -154,7 +154,7 @@ void PartyHandler::kick(const Being *const being) const
     if (being)
     {
         createOutPacket(CMSG_PARTY_KICK);
-        outMsg.writeInt32(being->getId(), "account id");
+        outMsg.writeBeingId(being->getId(), "account id");
         outMsg.writeString("", 24, "unused");
     }
 }
@@ -172,7 +172,7 @@ void PartyHandler::kick(const std::string &name) const
     }
 
     createOutPacket(CMSG_PARTY_KICK);
-    outMsg.writeInt32(m->getID(), "member id");
+    outMsg.writeBeingId(m->getID(), "member id");
     outMsg.writeString(name, 24, "unused");
 }
 
@@ -265,7 +265,7 @@ void PartyHandler::processPartyInfo(Net::MessageIn &msg)
 
     for (int i = 0; i < count; i++)
     {
-        const int id = msg.readInt32("id");
+        const BeingId id = msg.readBeingId("id");
         std::string nick = msg.readString(24, "nick");
         std::string map = msg.readString(16, "map");
         const bool leader = msg.readUInt8("leader") == 0U;
@@ -329,7 +329,7 @@ void PartyHandler::processPartyMessage(Net::MessageIn &msg)
     if (msgLength <= 0)
         return;
 
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     const std::string chatMsg = msg.readString(msgLength, "message");
 
     if (Ea::taParty && partyTab)
@@ -386,7 +386,7 @@ void PartyHandler::allowInvite(const bool allow A_UNUSED) const
 
 void PartyHandler::processPartyInvited(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("account id");
+    const BeingId id = msg.readBeingId("account id");
     const std::string partyName = msg.readString(24, "party name");
     std::string nick;
 
@@ -406,7 +406,7 @@ void PartyHandler::processPartyInvited(Net::MessageIn &msg)
 
 void PartyHandler::processPartyMove(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     PartyMember *m = nullptr;
     if (Ea::taParty)
         m = Ea::taParty->getMember(id);
@@ -437,7 +437,7 @@ void PartyHandler::processPartyMove(Net::MessageIn &msg)
 
 void PartyHandler::processPartyUpdateHp(Net::MessageIn &msg)
 {
-    const int id = msg.readInt32("id");
+    const BeingId id = msg.readBeingId("id");
     const int hp = msg.readInt16("hp");
     const int maxhp = msg.readInt16("max hp");
     PartyMember *m = nullptr;
diff --git a/src/net/tmwa/playerhandler.cpp b/src/net/tmwa/playerhandler.cpp
index c78382f27..95b157c00 100644
--- a/src/net/tmwa/playerhandler.cpp
+++ b/src/net/tmwa/playerhandler.cpp
@@ -124,10 +124,11 @@ void PlayerHandler::handleMessage(Net::MessageIn &msg)
     BLOCK_END("PlayerHandler::handleMessage")
 }
 
-void PlayerHandler::attack(const int id, const Keep keep) const
+void PlayerHandler::attack(const BeingId id,
+                           const Keep keep) const
 {
     createOutPacket(CMSG_PLAYER_CHANGE_ACT);
-    outMsg.writeInt32(id, "target id");
+    outMsg.writeBeingId(id, "target id");
     if (keep == Keep_true)
         outMsg.writeInt8(7, "action");
     else
@@ -170,7 +171,7 @@ void PlayerHandler::pickUp(const FloorItem *const floorItem) const
         return;
 
     createOutPacket(CMSG_ITEM_PICKUP);
-    outMsg.writeInt32(floorItem->getId(), "object id");
+    outMsg.writeBeingId(floorItem->getId(), "object id");
     TmwAthena::InventoryHandler *const handler =
         static_cast<TmwAthena::InventoryHandler*>(inventoryHandler);
     if (handler)
diff --git a/src/net/tmwa/playerhandler.h b/src/net/tmwa/playerhandler.h
index f0162c8f2..d8f159e8b 100644
--- a/src/net/tmwa/playerhandler.h
+++ b/src/net/tmwa/playerhandler.h
@@ -39,7 +39,8 @@ class PlayerHandler final : public MessageHandler, public Ea::PlayerHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void attack(const int id, const Keep keep) const override final;
+        void attack(const BeingId id,
+                    const Keep keep) const override final;
         void stopAttack() const override final;
         void emote(const uint8_t emoteId) const override final;
 
diff --git a/src/net/tmwa/skillhandler.cpp b/src/net/tmwa/skillhandler.cpp
index 1b8678682..5e8dd9729 100644
--- a/src/net/tmwa/skillhandler.cpp
+++ b/src/net/tmwa/skillhandler.cpp
@@ -82,12 +82,12 @@ void SkillHandler::handleMessage(Net::MessageIn &msg)
 }
 
 void SkillHandler::useBeing(const int id, const int level,
-                            const int beingId) const
+                            const BeingId beingId) const
 {
     createOutPacket(CMSG_SKILL_USE_BEING);
     outMsg.writeInt16(static_cast<int16_t>(id), "skill id");
     outMsg.writeInt16(static_cast<int16_t>(level), "level");
-    outMsg.writeInt32(beingId, "target id");
+    outMsg.writeBeingId(beingId, "target id");
 }
 
 void SkillHandler::usePos(const int id, const int level,
diff --git a/src/net/tmwa/skillhandler.h b/src/net/tmwa/skillhandler.h
index 047ae6330..62bab67d4 100644
--- a/src/net/tmwa/skillhandler.h
+++ b/src/net/tmwa/skillhandler.h
@@ -39,13 +39,16 @@ class SkillHandler final : public MessageHandler, public Ea::SkillHandler
 
         void handleMessage(Net::MessageIn &msg) override final;
 
-        void useBeing(const int id, const int level,
-                      const int beingId) const override final;
+        void useBeing(const int id,
+                      const int level,
+                      const BeingId beingId) const override final;
 
-        void usePos(const int id, const int level,
+        void usePos(const int id,
+                    const int level,
                     const int x, const int y) const override final;
 
-        void usePos(const int id, const int level,
+        void usePos(const int id,
+                    const int level,
                     const int x, const int y,
                     const std::string &text) const override final;
 
diff --git a/src/net/tmwa/tradehandler.cpp b/src/net/tmwa/tradehandler.cpp
index 5962ff89a..4ad803640 100644
--- a/src/net/tmwa/tradehandler.cpp
+++ b/src/net/tmwa/tradehandler.cpp
@@ -118,7 +118,7 @@ void TradeHandler::request(const Being *const being) const
         return;
 
     createOutPacket(CMSG_TRADE_REQUEST);
-    outMsg.writeInt32(being->getId(), "player id");
+    outMsg.writeBeingId(being->getId(), "player id");
 }
 
 void TradeHandler::respond(const bool accept) const