PaperMC/nms-patches/EntityEnderman.patch

--- a/net/minecraft/server/EntityEnderman.java
+++ b/net/minecraft/server/EntityEnderman.java
@@ -306,8 +306,12 @@
             boolean flag = movingobjectposition != null && movingobjectposition.a().equals(blockposition);
 
             if (EntityEnderman.c.contains(block) && flag) {
-                this.enderman.setCarried(iblockdata);
-                world.setAir(blockposition);
+                // CraftBukkit start - Pickup event
+                if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.enderman, this.enderman.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()), org.bukkit.Material.AIR).isCancelled()) {
+                    this.enderman.setCarried(iblockdata);
+                    world.setAir(blockposition);
+                }
+                // CraftBukkit end
             }
 
         }
@@ -337,8 +341,12 @@
             IBlockData iblockdata2 = this.a.getCarried();
 
             if (iblockdata2 != null && this.a(world, blockposition, iblockdata2.getBlock(), iblockdata, iblockdata1)) {
+                // CraftBukkit start - Place event
+                if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.a, blockposition.getX(), blockposition.getY(), blockposition.getZ(), this.a.getCarried().getBlock(), this.a.getCarried().getBlock().toLegacyData(this.a.getCarried())).isCancelled()) {
                 world.setTypeAndData(blockposition, iblockdata2, 3);
                 this.a.setCarried((IBlockData) null);
+                }
+                // CraftBukkit end
             }
 
         }