From 2426a2f9ea3cb22f2ce9bc12547b8832a71967fc Mon Sep 17 00:00:00 2001
From: Michael Pollind <mpollind@gmail.com>
Date: Sun, 14 Mar 2021 21:40:19 -0700
Subject: [PATCH] start on contract model

---
 .../modules/crafting/contract/Contract.java       | 15 +++++++++++++++
 .../modules/crafting/systems/ContractSystem.java  | 13 +++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 src/main/java/org/terasology/modules/crafting/contract/Contract.java
 create mode 100644 src/main/java/org/terasology/modules/crafting/systems/ContractSystem.java

diff --git a/src/main/java/org/terasology/modules/crafting/contract/Contract.java b/src/main/java/org/terasology/modules/crafting/contract/Contract.java
new file mode 100644
index 0000000..9513d23
--- /dev/null
+++ b/src/main/java/org/terasology/modules/crafting/contract/Contract.java
@@ -0,0 +1,15 @@
+// Copyright 2021 The Terasology Foundation
+// SPDX-License-Identifier: Apache-2.0
+
+package org.terasology.modules.crafting.contract;
+
+import org.terasology.engine.entitySystem.prefab.Prefab;
+
+import java.util.Collection;
+
+public interface Contract<T> {
+    Class<T> contractComponent();
+
+    Collection<Prefab> outputs();
+    Collection<Prefab> inputs();
+}
diff --git a/src/main/java/org/terasology/modules/crafting/systems/ContractSystem.java b/src/main/java/org/terasology/modules/crafting/systems/ContractSystem.java
new file mode 100644
index 0000000..191a7cb
--- /dev/null
+++ b/src/main/java/org/terasology/modules/crafting/systems/ContractSystem.java
@@ -0,0 +1,13 @@
+// Copyright 2021 The Terasology Foundation
+// SPDX-License-Identifier: Apache-2.0
+
+package org.terasology.modules.crafting.systems;
+
+
+import org.terasology.engine.entitySystem.systems.RegisterMode;
+import org.terasology.engine.entitySystem.systems.RegisterSystem;
+
+@RegisterSystem(RegisterMode.AUTHORITY)
+public class ContractSystem {
+
+}