From a1748ca81fa7ebcc1c1478d4f2cf6749166f1ba6 Mon Sep 17 00:00:00 2001
From: ricardoofnl <raditiyaeltamricardo@outlook.de>
Date: Sat, 5 Sep 2026 09:04:40 +0700
Subject: [PATCH] [saco] Implement/match `UnkAB`; the trailing `GetAt` only
 survives DCE when its result gates a `return`

---
 saco/net/actorpool.h | 20 ++++++++++++++++++++
 saco/net/netrpc.cpp  | 26 +++++++++++++++++++++++++-
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/saco/net/actorpool.h b/saco/net/actorpool.h
index ba157c3..ccf6bdb 100644
--- a/saco/net/actorpool.h
+++ b/saco/net/actorpool.h
@@ -3,6 +3,19 @@
 
 //----------------------------------------------------
 
+// 27 bytes, the block the create-actor RPC reads off the wire
+typedef struct _ACTOR_INFO
+{
+	ACTORID	ActorID;
+	int		iModel;
+	VECTOR	vecPos;
+	float	fRotation;
+	float	fHealth;
+	BYTE	byteInvulnerable;
+} ACTOR_INFO;
+
+//----------------------------------------------------
+
 class CActorPool
 {
 public:
@@ -19,6 +32,13 @@ public:
 	~CActorPool(); // .text:100018E0
 
 	void sub_100016F0(ACTORID ActorID); // .text:100016F0
+	void sub_10001900(ACTOR_INFO *pActorInfo); // .text:10001900
+
+	int GetAt(ACTORID ActorID) {
+		if(ActorID >= MAX_ACTORS) return 0;
+		if(!field_FA4[ActorID]) return 0;
+		return field_4[ActorID];
+	}
 	ACTORID FUNC_100018B0(DWORD dwPtr); // .text:100018B0
 };
 
diff --git a/saco/net/netrpc.cpp b/saco/net/netrpc.cpp
index 2ccafd3..82fdf8c 100644
--- a/saco/net/netrpc.cpp
+++ b/saco/net/netrpc.cpp
@@ -1,5 +1,6 @@
 
 #include "../main.h"
+#include "../game/util.h"
 #include "../../raknet/StringCompressor.h"
 
 extern CNetGame*	pNetGame;
@@ -891,7 +892,30 @@ void FUNC_10011990(BYTE byteType, DWORD dwValue, BYTE byteResult)
 	pNetGame->GetRakClient()->RPC(RPC_ClientCheck,&bsSend,HIGH_PRIORITY,RELIABLE_ORDERED,0,FALSE);
 }
 void ClientCheck(RPCParameters *rpcParams) {}
-void UnkAB(RPCParameters *rpcParams) {}
+void UnkAB(RPCParameters *rpcParams)
+{
+	PCHAR Data = reinterpret_cast<PCHAR>(rpcParams->input);
+	int iBitLength = rpcParams->numberOfBitsOfData;
+
+	ACTOR_INFO ActorInfo;
+
+	RakNet::BitStream bsData(Data,(iBitLength/8)+1,false);
+
+	CActorPool *pActorPool = pNetGame->GetActorPool();
+
+	if(!pActorPool) return;
+
+	memset(&ActorInfo,0,sizeof(ACTOR_INFO));
+	bsData.Read((PCHAR)&ActorInfo,sizeof(ACTOR_INFO));
+
+	if(IsValidPedModel(ActorInfo.iModel))
+	{
+		pActorPool->sub_10001900(&ActorInfo);
+
+		// retail still does the lookup here even though nothing follows it
+		if(!pActorPool->GetAt(ActorInfo.ActorID)) return;
+	}
+}
 // not registered, kept alive only by the rest of the section
 void FUNC_1000EBA0(RPCParameters *rpcParams)
 {