Replica Guide for B3

To use: You'll want to bring your own more performant rpc url for the base chain instead of using the default. Configure this by export L1_RPC_URL={YOUR BASE CHAIN RPC URL}. Then run make replica-up. Syncing the replica from scratch might take up to a couple hours

A number of constants have already been set:

• Beacon chain API
• the sequencer http url, which allows for transactions sent to the replica node to be forwarded to the sequencer, effectively meaning you can use the replica node like a full rpc provider
• the p2p endpoint, which means that the replica can the latest blocks produced from a trusted source

To check on the sync status of the node:

RPC_URL=http://localhost:7545
curl $RPC_URL -X POST -H "Content-Type: application/json" --data \
    '{"jsonrpc":"2.0","method":"optimism_syncStatus","params":[],"id":1}' | jq .

or bash progress.sh

Snapshot:

https://constellationlabs-dashboard-beta.s3.us-west-2.amazonaws.com/b3/Jul_1_2025_b3_geth_data.tar

Commands:

    L1_RPC_URL={INSERT RPC URL} make replica-up

    make replica-down

    make replica-clean

Celestia upgrades

Please refer to celestia docs for network upgrades: https://docs.celestia.org/how-to-guides/participate#network-upgrades