Optimism

Firehose configuration for Optimism (OP Mainnet)

This page provides Optimism (OP Mainnet) specific configuration. First read the Ethereum general notes for common information.

Docker Image

ghcr.io/streamingfast/go-ethereum:optimism-<version>-fh3.0

View available versions on GitHub Packages

The image contains both the Firehose-patched OP Geth binary and fireeth.

Client Binary

Client	Repository	Source Branch	Releases
OP Geth (Firehose-patched)	streamingfast/go-ethereum	release/optimism-1.x-fh3.0	optimism-*

Networks

Network	Chain Name
OP Mainnet	optimism-mainnet
OP Sepolia	optimism-sepolia

OP Node Dependency

Optimism requires an OP Node (consensus client) running alongside OP Geth. The OP Node connects to Ethereum L1 for state derivation. Refer to the Optimism documentation for OP Node setup.

Reader Node Configuration

OP Mainnet

fireeth start reader-node <apps> \
  --advertise-chain-name="optimism-mainnet" \
  --reader-node-path="geth" \
  --reader-node-arguments="--datadir={node-data-dir} --networkid=10 --op-network=op-mainnet --rollup.sequencerhttp=https://mainnet-sequencer.optimism.io/ --authrpc.addr=0.0.0.0 --authrpc.port=8551 --authrpc.vhosts=* --authrpc.jwtsecret=/path/to/jwt.hex --vmtrace=firehose --state.scheme=path" \
  <other_flags...>

OP Sepolia

fireeth start reader-node <apps> \
  --advertise-chain-name="optimism-sepolia" \
  --reader-node-path="geth" \
  --reader-node-arguments="--datadir={node-data-dir} --networkid=11155420 --op-network=op-sepolia --rollup.sequencerhttp=https://sepolia-sequencer.optimism.io/ --authrpc.addr=0.0.0.0 --authrpc.port=8551 --authrpc.vhosts=* --authrpc.jwtsecret=/path/to/jwt.hex --vmtrace=firehose --state.scheme=path" \
  <other_flags...>

Key OP Geth Flags

Flag	Description
--vmtrace=firehose	Required. Enables Firehose Protocol output
--op-network	OP Stack network name
--networkid	Network ID (10 for OP Mainnet)
--rollup.sequencerhttp	Sequencer endpoint for transaction submission
--authrpc.jwtsecret	Path to JWT secret for OP Node connection
--state.scheme=path	Recommended state storage scheme
--datadir	Data directory (use {node-data-dir} template)

Resources

• Optimism Documentation

• OP Node Setup

• streamingfast/go-ethereum