moved rest of the stuff. mixins needed still

src/main/java/carpet/helpers/PortalHelper.java

@@ -0,0 +1,19 @@
+package carpet.helpers;
+
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.block.Blocks;
+import net.minecraft.item.BlockItem;
+
+public class PortalHelper
+{
+    public static boolean player_holds_obsidian(PlayerEntity playerIn)
+    {
+        if ( (!playerIn.getMainHandStack().isEmpty()
+            && playerIn.getMainHandStack().getItem() instanceof BlockItem &&
+            ((BlockItem)(playerIn.getMainHandStack().getItem())).getBlock() == Blocks.OBSIDIAN   ))
+        {
+            return true;
+        }
+        return false;
+    }
+}