Paper/nms-patches/ItemFireball.patch

--- a/net/minecraft/server/ItemFireball.java
+++ b/net/minecraft/server/ItemFireball.java
@@ -18,12 +18,28 @@
 
             if (iblockdata.getBlock() == Blocks.CAMPFIRE) {
                 if (!(Boolean) iblockdata.get(BlockCampfire.b) && !(Boolean) iblockdata.get(BlockCampfire.d)) {
+                    // CraftBukkit start - fire BlockIgniteEvent
+                    if (org.bukkit.craftbukkit.event.CraftEventFactory.callBlockIgniteEvent(world, blockposition, org.bukkit.event.block.BlockIgniteEvent.IgniteCause.FIREBALL, itemactioncontext.getEntity()).isCancelled()) {
+                        if (!itemactioncontext.getEntity().abilities.canInstantlyBuild) {
+                            itemactioncontext.getItemStack().subtract(1);
+                        }
+                        return EnumInteractionResult.PASS;
+                    }
+                    // CraftBukkit end
                     this.a(world, blockposition);
                     world.setTypeUpdate(blockposition, (IBlockData) iblockdata.set(BlockCampfire.b, true));
                 }
             } else {
                 blockposition = blockposition.shift(itemactioncontext.getClickedFace());
                 if (world.getType(blockposition).isAir()) {
+                    // CraftBukkit start - fire BlockIgniteEvent
+                    if (org.bukkit.craftbukkit.event.CraftEventFactory.callBlockIgniteEvent(world, blockposition, org.bukkit.event.block.BlockIgniteEvent.IgniteCause.FIREBALL, itemactioncontext.getEntity()).isCancelled()) {
+                        if (!itemactioncontext.getEntity().abilities.canInstantlyBuild) {
+                            itemactioncontext.getItemStack().subtract(1);
+                        }
+                        return EnumInteractionResult.PASS;
+                    }
+                    // CraftBukkit end
                     this.a(world, blockposition);
                     world.setTypeUpdate(blockposition, ((BlockFire) Blocks.FIRE).a((IBlockAccess) world, blockposition));
                 }