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.

   ./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.