2 files changed, 37 insertions, 2 deletions
diff --git a/src/main/java/gregtech/api/interfaces/tileentity/IHasWorldObjectAndCoords.java b/src/main/java/gregtech/api/interfaces/tileentity/IHasWorldObjectAndCoords.java
index 64d206aff7..6d81d5c401 100644
--- a/src/main/java/gregtech/api/interfaces/tileentity/IHasWorldObjectAndCoords.java
+++ b/src/main/java/gregtech/api/interfaces/tileentity/IHasWorldObjectAndCoords.java
@@ -136,8 +136,9 @@ public interface IHasWorldObjectAndCoords {
     boolean isDead();
 
     /**
-     * Sends a Block Event to the Client TileEntity, the byte Parameters are only for validation as Minecraft doesn't
-     * properly write Packet Data.
+     * Sends a Block Event to the Client TileEntity.
+     * 
+     * @param aValue value to sync
      */
     void sendBlockEvent(byte aID, byte aValue);
 
diff --git a/src/main/java/gregtech/api/interfaces/tileentity/IRecipeLockable.java b/src/main/java/gregtech/api/interfaces/tileentity/IRecipeLockable.java
new file mode 100644
index 0000000000..f793221a50
--- /dev/null
+++ b/src/main/java/gregtech/api/interfaces/tileentity/IRecipeLockable.java
@@ -0,0 +1,34 @@
+package gregtech.api.interfaces.tileentity;
+
+import gregtech.api.recipe.check.SingleRecipeCheck;
+import gregtech.api.util.GT_Recipe;
+
+/**
+ * Machines implementing this interface can have logic to lock to a single recipe.
+ */
+public interface IRecipeLockable {
+
+    /**
+     * @return if this machine supports single recipe locking.
+     */
+    boolean supportsSingleRecipeLocking();
+
+    /**
+     * @return true if recipe locking is enabled, else false. This is getter is used for displaying the icon in the GUI
+     */
+    boolean isRecipeLockingEnabled();
+
+    void setRecipeLocking(boolean enabled);
+
+    default boolean getDefaultRecipeLockingMode() {
+        return false;
+    }
+
+    default SingleRecipeCheck getSingleRecipeCheck() {
+        return null;
+    }
+
+    default void setSingleRecipeCheck(SingleRecipeCheck recipeCheck) {}
+
+    GT_Recipe.GT_Recipe_Map getRecipeMap();
+}