craftbukkit/nms-patches/net/minecraft/world/entity/item/EntityTNTPrimed.patch

--- a/net/minecraft/world/entity/item/EntityTNTPrimed.java
+++ b/net/minecraft/world/entity/item/EntityTNTPrimed.java
@@ -17,12 +17,16 @@
 import net.minecraft.world.level.Explosion;
 import net.minecraft.world.level.World;
 
+import org.bukkit.event.entity.ExplosionPrimeEvent; // CraftBukkit
+
 public class EntityTNTPrimed extends Entity {
 
     private static final DataWatcherObject<Integer> DATA_FUSE_ID = DataWatcher.defineId(EntityTNTPrimed.class, DataWatcherRegistry.INT);
     private static final int DEFAULT_FUSE_TIME = 80;
     @Nullable
     public EntityLiving owner;
+    public float yield = 4; // CraftBukkit - add field
+    public boolean isIncendiary = false; // CraftBukkit - add field
 
     public EntityTNTPrimed(EntityTypes<? extends EntityTNTPrimed> entitytypes, World world) {
         super(entitytypes, world);
@@ -73,10 +77,13 @@
 
         this.setFuse(i);
         if (i <= 0) {
-            this.discard();
+            // CraftBukkit start - Need to reverse the order of the explosion and the entity death so we have a location for the event
+            // this.discard();
             if (!this.level.isClientSide) {
                 this.explode();
             }
+            this.discard();
+            // CraftBukkit end
         } else {
             this.updateInWaterStateAndDoFluidPushing();
             if (this.level.isClientSide) {
@@ -87,9 +94,16 @@
     }
 
     private void explode() {
-        float f = 4.0F;
+        // CraftBukkit start
+        // float f = 4.0F;
 
-        this.level.explode(this, this.getX(), this.getY(0.0625D), this.getZ(), 4.0F, Explosion.Effect.BREAK);
+        ExplosionPrimeEvent event = new ExplosionPrimeEvent((org.bukkit.entity.Explosive) this.getBukkitEntity());
+        this.level.getCraftServer().getPluginManager().callEvent(event);
+
+        if (!event.isCancelled()) {
+            this.level.explode(this, this.getX(), this.getY(0.0625D), this.getZ(), event.getRadius(), event.getFire(), Explosion.Effect.BREAK);
+        }
+        // CraftBukkit end
     }
 
     @Override