in an attempt to decipher the pickup sound, it seems every item pickup comes with a 'congratulations' packet

common/src/main/scala/net/psforever/packet/game/ActionResultMessage.scala

@@ -1,7 +1,7 @@
 // Copyright (c) 2017 PSForever
 package net.psforever.packet.game
 
-import net.psforever.packet.{GamePacketOpcode, Marshallable, PacketHelpers, PlanetSideGamePacket}
+import net.psforever.packet.{GamePacketOpcode, Marshallable, PlanetSideGamePacket}
 import scodec.Codec
 import scodec.codecs._
 
@@ -10,7 +10,8 @@ import scodec.codecs._
   * Is sent by the server when the client has performed an action from a menu item
   * (i.e create character, delete character, etc...)
   */
-final case class ActionResultMessage(successfull : Boolean, errorCode : Option[Long])
+final case class ActionResultMessage(successful : Boolean,
+                                     errorCode : Option[Long])
   extends PlanetSideGamePacket {
   type Packet = ActionResultMessage
   def opcode = GamePacketOpcode.ActionResultMessage
@@ -18,6 +19,14 @@ final case class ActionResultMessage(successfull : Boolean, errorCode : Option[L
 }
 
 object ActionResultMessage extends Marshallable[ActionResultMessage] {
+  def apply() : ActionResultMessage = {
+    ActionResultMessage(true, None)
+  }
+
+  def apply(error : Long) : ActionResultMessage = {
+    ActionResultMessage(false, Some(error))
+  }
+
   implicit val codec : Codec[ActionResultMessage] = (
     ("successful" | bool) >>:~ { res =>
       // if not successful, look for an error code

common/src/test/scala/game/ActionResultMessageTest.scala

@@ -7,27 +7,54 @@ import net.psforever.packet.game._
 import scodec.bits._
 
 class ActionResultMessageTest extends Specification {
-  "decode" in {
-    PacketCoding.DecodePacket(hex"1f 80").require match {
-      case ActionResultMessage(okay, code) =>
-        okay === true
-        code === None
-      case _ =>
-        ko
-    }
+  val string_pass = hex"1f 80"
+  val string_fail = hex"1f 0080000000"
 
-    PacketCoding.DecodePacket((hex"1f".bits ++ bin"0" ++ hex"01000000".bits).toByteVector).require match {
+  "decode (pass)" in {
+    PacketCoding.DecodePacket(string_pass).require match {
       case ActionResultMessage(okay, code) =>
-        okay === false
-        code === Some(1)
+        okay mustEqual true
+        code mustEqual None
       case _ =>
         ko
     }
   }
 
-  "encode" in {
-    PacketCoding.EncodePacket(ActionResultMessage(true, None)).require.toByteVector === hex"1f 80"
-    PacketCoding.EncodePacket(ActionResultMessage(false, Some(1))).require.toByteVector ===
-      (hex"1f".bits ++ bin"0" ++ hex"01000000".bits).toByteVector
+  "decode (fail)" in {
+    PacketCoding.DecodePacket(string_fail).require match {
+      case ActionResultMessage(okay, code) =>
+        okay mustEqual false
+        code mustEqual Some(1)
+      case _ =>
+        ko
+    }
+  }
+
+  "encode (pass, full)" in {
+    val msg = ActionResultMessage(true, None)
+    val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+    pkt mustEqual string_pass
+  }
+
+  "encode (pass, minimal)" in {
+    val msg = ActionResultMessage()
+    val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+    pkt mustEqual string_pass
+  }
+
+  "encode (fail, full)" in {
+    val msg = ActionResultMessage(false, Some(1))
+    val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+    pkt mustEqual string_fail
+  }
+
+  "encode (fail, minimal)" in {
+    val msg = ActionResultMessage(1)
+    val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+    pkt mustEqual string_fail
   }
 }

pslogin/src/main/scala/WorldSessionActor.scala

@@ -1403,6 +1403,7 @@ class WorldSessionActor extends Actor with MDCContextAware {
               definition.Packet.DetailedConstructorData(item).get
             )
           )
+          sendResponse(ActionResultMessage())
           if(tplayer.VisibleSlots.contains(slot)) {
             avatarService ! AvatarServiceMessage(tplayer.Continent, AvatarAction.EquipmentInHand(player_guid, player_guid, slot, item))
           }