PaperMC/nms-patches/PacketPlayInBlockPlace.patch

--- a/net/minecraft/server/PacketPlayInBlockPlace.java
+++ b/net/minecraft/server/PacketPlayInBlockPlace.java
@@ -6,6 +6,8 @@
 
     private EnumHand a;
 
+    public long timestamp; // CraftBukkit
+
     public PacketPlayInBlockPlace() {}
 
     public PacketPlayInBlockPlace(EnumHand enumhand) {
@@ -13,6 +15,7 @@
     }
 
     public void a(PacketDataSerializer packetdataserializer) throws IOException {
+        this.timestamp = System.currentTimeMillis(); // CraftBukkit
         this.a = (EnumHand) packetdataserializer.a(EnumHand.class);
     }