Deploy a rollup node

Learn how to run a node for the B2.

System Requirements

hardware requirements

• CPUs: 16 vCPUs

• RAM: 32 GB

• Storage: 1 TB NVMe Storage

• 100MBps bidirectional internet connection

You can run B2 on lower-spec hardware, but you may find that it is not highly performant or prone to crashing.

software requirements

OS：As long as Docker Engine can be installed, the operating system will suffice.

Pre-install

Install Docker

Please refer to the Install Docker Engine

Install Docker-compose

Please refer to the Install Docker Compose

Download Snapshot Data

docker run \
  --rm \
  --volume ./data:/data \
  ghcr.io/b2network/bsquared-snapshpt-download:20250707-160537 \
  mainnet-fullnode-snapshot /data

The snapshot file will be updated every Friday. The download will be temporarily unavailable. Please wait a while and try again.

Setup B2 Node

Generate jwt secret:

openssl rand -hex 32 > ./data/jwt.txt

Create a docker-compose.yaml file and mount the data directory and json files which downloaded above.

Changelog for the docker-compose.yaml:

Users who have already been set up can also upgrade,The upgrade will improve block synchronization.

• L2 image change to us-docker.pkg.dev/oplabs-tools-artifacts/images/op-geth:v1.101315.2

• OP image change to us-docker.pkg.dev/oplabs-tools-artifacts/images/op-node:v1.7.7

• OP_NODE_P2P_STATIC: "/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32046/p2p/16Uiu2HAm1hkacTvu8HzwPs2Mv8cHo6RfMX9vbEi4T8FuXFRK7VEM,/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32048/p2p/16Uiu2HAm1oTTtY6QkUdVUY8qn86Aa6MPR8FxMR4VQzXKT6tCPEun,/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32050/p2p/16Uiu2HAmJhSCro27M9ZQ4yPkEQjYcRx1QJ9BmzfunNPPHbJsXnGV,/dns/b2-mainnet-bootnode1.bsquared.network/tcp/9222/p2p/16Uiu2HAkwyquyg55Jnmo97czvXfB6Evove1C4jUdMoFRQEQkgbnn,/dns/b2-mainnet-bootnode2.bsquared.network/tcp/9222/p2p/16Uiu2HAmSP44jYc7aJVXJhKVoYUFqkotwpEU1zqxYCksvUWwcyFT"

• GETH_BOOTNODES: "enode://55b79017f15cad10bb8ad433fb991e6a0d0ca5ccef3f9123618869ee405d61b5[e-mail]:32045,enode://ad371eb83f665586985f4482adc8bb7fff793370843d73124e8b23c7aa69f01b[e-mail]:32047,enode://274310e51ffbc42167dbf1adbcf0ef43f50db9f8f0c84d9f25ac6cf1659ca57b[e-mail]:32049,enode://7ddd900597dde5cca6508cf33264dd528b945563d3d6ff5d0d2b16ecf8e14ca9[e-mail]:30303,enode://01c15b6db86024b708a3f3e2cdea2769264bc81dc8997752b44b904daff98f2c[e-mail]:30303"

version: "3.9"
services:
  l2:
    #image: ghcr.io/b2network/op-geth:v1.0
    image: us-docker.pkg.dev/oplabs-tools-artifacts/images/op-geth:v1.101315.2 
    container_name: l2
    environment:
      GETH_VERBOSITY: "3"
      GETH_DATADIR: "/db"
      GETH_ROLLUP_DISABLETXPOOLGOSSIP: "false"
      GETH_ROLLUP_SEQUENCERHTTP: "https://b2-mainnet.alt.technology/"
      GETH_HTTP: "true"
      GETH_HTTP_ADDR: "0.0.0.0"
      GETH_HTTP_API:  "web3,debug,eth,txpool,net,engine"
      GETH_HTTP_VHOSTS: "*" 
      GETH_WS:  "true"
      GETH_WS_ADDR: "0.0.0.0"
      GETH_WS_API: "web3,debug,eth,txpool,net,engine"
      GETH_AUTHRPC_ADDR:  "0.0.0.0"
      GETH_AUTHRPC_PORT: "8551"
      GETH_AUTHRPC_JWTSECRET: "/jwt.txt"
      GETH_BOOTNODES: "enode://55b79017f15cad10bb8ad433fb991e6a0d0ca5ccef3f9123618869ee405d61b5[e-mail]:32045,enode://ad371eb83f665586985f4482adc8bb7fff793370843d73124e8b23c7aa69f01b[e-mail]:32047,enode://274310e51ffbc42167dbf1adbcf0ef43f50db9f8f0c84d9f25ac6cf1659ca57b[e-mail]:32049,enode://7ddd900597dde5cca6508cf33264dd528b945563d3d6ff5d0d2b16ecf8e14ca9[e-mail]:30303,enode://01c15b6db86024b708a3f3e2cdea2769264bc81dc8997752b44b904daff98f2c[e-mail]:30303" 
      GETH_METRICS: "true"
    restart: always
    network_mode: host
    volumes:
    - ./data/db:/db
    - ./data/genesis.json:/genesis.json
    - ./data/jwt.txt:/jwt.txt

  op-node:
    #image: us-docker.pkg.dev/oplabs-tools-artifacts/images/op-node:99a53381019d3571359d989671ccf70f8d69dfd9
    image: us-docker.pkg.dev/oplabs-tools-artifacts/images/op-node:v1.7.7 
    container_name: op-node
    environment:
      OP_NODE_SYNCMODE: "execution-layer"
      OP_NODE_L1_TRUST_RPC: "true"
      OP_NODE_SEQUENCER_L1_CONFS: "10"
      OP_NODE_VERIFIER_L1_CONFS:  "10"
      OP_NODE_L1_BEACON: "https://hub-cl-rpc.bsquared.network"
      OP_NODE_L2_ENGINE_RPC: "ws://127.0.0.1:8551"
      OP_NODE_L2_ENGINE_AUTH: "/jwt.txt"
      OP_NODE_ROLLUP_CONFIG:  "rollup.json"
      OP_NODE_RPC_ADDR: "0.0.0.0"
      OP_NODE_L1_ETH_RPC: "https://hub-rpc.bsquared.network"
      OP_NODE_L1_RPC_KIND: "standard"
      OP_NODE_METRICS_ENABLED:  "true"
      OP_NODE_P2P_LISTEN_IP: "0.0.0.0"
      OP_NODE_P2P_LISTEN_TCP_PORT: "9222"
      OP_NODE_P2P_LISTEN_UDP_PORT: "9222"
      OP_NODE_P2P_DISCOVERY_PATH: "/data/node/opnode_discovery_db"
      OP_NODE_P2P_PEERSTORE_PATH: "/data/node/opnode_peerstore_db"
      OP_NODE_P2P_STATIC: "/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32046/p2p/16Uiu2HAm1hkacTvu8HzwPs2Mv8cHo6RfMX9vbEi4T8FuXFRK7VEM,/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32048/p2p/16Uiu2HAm1oTTtY6QkUdVUY8qn86Aa6MPR8FxMR4VQzXKT6tCPEun,/dns/b2-mainnet-bootnodes.altlayer.network/tcp/32050/p2p/16Uiu2HAmJhSCro27M9ZQ4yPkEQjYcRx1QJ9BmzfunNPPHbJsXnGV,/dns/b2-mainnet-bootnode1.bsquared.network/tcp/9222/p2p/16Uiu2HAkwyquyg55Jnmo97czvXfB6Evove1C4jUdMoFRQEQkgbnn,/dns/b2-mainnet-bootnode2.bsquared.network/tcp/9222/p2p/16Uiu2HAmSP44jYc7aJVXJhKVoYUFqkotwpEU1zqxYCksvUWwcyFT"
    depends_on:
    - l2
    restart: always
    network_mode: host
    volumes:
    - ./data/node:/data/node
    - ./data/jwt.txt:/jwt.txt
    - ./data/rollup.json:/rollup.json

Now, All preparations are complete, and the data directory structure is as follow:

tree -L 3
.
├── data
│   ├── db
│   │   ├── geth
│   │   └── keystore
│   ├── db.tar.gz
│   ├── genesis.json
│   ├── jwt.txt
│   └── rollup.json
└── docker-compose.yml

The next step is to start the service.

Start The Node

docker-compose up -d

Verify Result

Watch the L2 container logs

docker logs -f l2

l2  | INFO [06-17|09:45:07.841] Merge configured:
l2  | INFO [06-17|09:45:07.841]  - Hard-fork specification:    https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md
l2  | INFO [06-17|09:45:07.841]  - Network known to be merged: true
l2  | INFO [06-17|09:45:07.841]  - Total terminal difficulty:  0
l2  | INFO [06-17|09:45:07.841]  - Merge netsplit block:       #0
l2  | INFO [06-17|09:45:07.841]
l2  | INFO [06-17|09:45:07.841] Post-Merge hard forks (timestamp based):
l2  | INFO [06-17|09:45:07.841]  - Shanghai:                    @0          (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)
l2  | INFO [06-17|09:45:07.841]  - Cancun:                      @0
l2  | INFO [06-17|09:45:07.841]  - Regolith:                    @0
l2  | INFO [06-17|09:45:07.841]  - Canyon:                      @0
l2  | INFO [06-17|09:45:07.841]  - Ecotone:                     @0
l2  | INFO [06-17|09:45:07.841]
l2  | INFO [06-17|09:45:07.841] ---------------------------------------------------------------------------------------------------------------------------------------------------------
l2  | INFO [06-17|09:45:07.841]
l2  | INFO [06-17|09:45:07.877] Loaded most recent local block           number=2,593,146 hash=12c9b9..19e5d4 td=0 age=3d2h17m
l2  | INFO [06-17|09:45:07.877] Loaded most recent local finalized block number=2,592,324 hash=5dd607..3a9f3c td=0 age=3d2h44m
l2  | INFO [06-17|09:45:07.879] Loaded last snap-sync pivot marker       number=2,190,015

Block synchronization takes some time, please wait patiently. After some while，can check the syncing process by below command:

curl -s -X POST -H 'Content-Type: application/json' --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8545 | jq '.result'

The block will catch up to the latest block once the request returns false.

# curl -s -X POST -H 'Content-Type: application/json' --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8545 | jq '.result'
false