From e2f165dbfb37afe90e89bb6f9f38b27d81609fa0 Mon Sep 17 00:00:00 2001
From: Bloxster <bloxster@proton.me>
Date: Sat, 4 Jan 2025 08:13:29 +0100
Subject: [PATCH] added op-node

---
 src/SUMMARY.md |  1 +
 src/op-node.md | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 src/op-node.md

diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index 47d2145..080a8bd 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -40,6 +40,7 @@
     - [TxPool](advanced/txpool.md)
     - [Sentry](advanced/sentry.md)
     - [Downloader](advanced/downloader.md)
+    - [Running an Op-node](op-node.md)
     - [TLS Authentication](advanced/tls-authentication.md)
     - [Perfomance Tricks](advanced/performance.md)
 
diff --git a/src/op-node.md b/src/op-node.md
new file mode 100644
index 0000000..434dbc7
--- /dev/null
+++ b/src/op-node.md
@@ -0,0 +1,13 @@
+# Running an Op-Node Alongside Erigon
+
+To run an op-node alongside Erigon, follow these steps:
+
+1. **Start Erigon with Caplin Enabled**:
+    If Caplin is running as the consensus layer (CL), use the `--caplin.blobs-immediate-backfill` flag to ensure the last 18 days of blobs are backfilled, which is critical for proper synchronization with the op-node, assuming you start from a snapshot.
+    ```bash
+    ./build/bin/erigon --caplin.blobs-immediate-backfill
+    ```
+2. **Run the Op-Node**:
+Configure the op-node with the `--l1.trustrpc` flag to trust the Erigon RPC layer as the L1 node. This setup ensures smooth communication and synchronization.
+
+This configuration enables the op-node to function effectively with Erigon serving as both the L1 node and the CL.