From 464fbbaeaa0b4feefe13d1a9db782f6f39bd7fd4 Mon Sep 17 00:00:00 2001
From: Zach Howard <zach@oplabs.co>
Date: Thu, 9 Jan 2025 17:21:34 -0600
Subject: [PATCH] feat: generate op-supervisor dependency set json (#131)

---
 README.md                                     |  2 +-
 main.star                                     |  1 +
 .../op-supervisor/op_supervisor_launcher.star | 22 ++++++++++++++++++-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 732dc7cc..d7b36a93 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ optimism_package:
       # The Docker image that should be used for the supervisor; leave blank to use the default op-supervisor image
       image: ""
 
-      # A JSON string containing chain dependencies
+      # A JSON string containing chain dependencies (generated by default).
       dependency_set: ""
 
       # A list of optional extra params that will be passed to the supervisor container for modifying its behaviour
diff --git a/main.star b/main.star
index 94d51d9b..923a7f12 100644
--- a/main.star
+++ b/main.star
@@ -116,6 +116,7 @@ def run(plan, args):
         op_supervisor_launcher.launch(
             plan,
             l1_config_env_vars,
+            optimism_args_with_right_defaults.chains,
             all_participants,
             jwt_file,
             interop_params.supervisor_params,
diff --git a/src/interop/op-supervisor/op_supervisor_launcher.star b/src/interop/op-supervisor/op_supervisor_launcher.star
index 8636cbd1..24f612d1 100644
--- a/src/interop/op-supervisor/op_supervisor_launcher.star
+++ b/src/interop/op-supervisor/op_supervisor_launcher.star
@@ -26,15 +26,35 @@ DATA_DIR = "/etc/op-supervisor"
 DEPENDENCY_SET_FILE_NAME = "dependency_set.json"
 
 
+def create_dependency_set(chains):
+    result = {
+        "dependencies": {
+            str(chain.network_params.network_id): {
+                "chainIndex": str(chain.network_params.network_id),
+                "activationTime": 0,
+                "historyMinTime": 0,
+            }
+            for chain in chains
+        }
+    }
+    return result
+
+
 def launch(
     plan,
     l1_config_env_vars,
+    chains,
     all_participants,
     jwt_file,
     supervisor_params,
 ):
+    dependency_set_json = supervisor_params.dependency_set
+    if not dependency_set_json:
+        dependency_set = create_dependency_set(chains)
+        dependency_set_json = json.encode(dependency_set)
+
     dependency_set_artifact = utils.write_to_file(
-        plan, supervisor_params.dependency_set, DATA_DIR, DEPENDENCY_SET_FILE_NAME
+        plan, dependency_set_json, DATA_DIR, DEPENDENCY_SET_FILE_NAME
     )
 
     config = get_supervisor_config(