Rootstock Node Configuration Reference | Rootstock (RSK)

See CLI flags for command line flag options.

Important Notice: From RSKj HOP v4.2.0, RocksDB is no longer experimental. See using RocksDB.

Advanced Configuration

For advanced configuration requirements, please refer to this expected configuration file. This contains all possible configuration fields parsed by RSKj.

The default values for the config file are defined in this reference config file; and are "inherited" and varied based on the selected network.


The following detail the most commonly used configuration fields parsed by RSKj.


Describes how your node peers with other nodes.

  • peer.discovery.enabled = [true/false] enables the possibility of being discovered by new peers.

  • peer.discovery.ip.list = [] is a list of the peers to start the discovering. These peers must have the discovery.enabled option set to true. These are the list of some of RSK bootstrap nodes:

    Regtest Not applicable
    Testnet "","","",""
    Mainnet "","","","","","","","","","","","","","","",""
  • = [] is used to connect to specific nodes. It can be empty.

  • peer.trusted = [] is a list of peers whose incoming connections are always accepted from. It can be empty.

  • peer.port is the port used to listen to incoming connections. Default port by each RSK network:

    Regtest 30305
    Testnet 50505
    Mainnet 5050
  • peer.connection.timeout = number (seconds) specifies in seconds the timeout for trying to connect to a peer. Suggested value: 2.

  • = number (seconds) specifies in seconds how much time you will wait for a message to come before closing the channel. Suggested value: 30.

  • peer.privateKey = hash is a securely generated private key unique for your node that must be set.
  • peer.networkId = int is the number of the network to connect to. It's important to maintain these numbers. It identifies the network you are going to connect to. For a Regtest private network, you should always use the same (not necessarily 34567). RSK networks IDs:

    Regtest 34567
    Testnet 779
    Mainnet 775
  • peer.maxActivePeers = int is the max number of active peers that your node will maintain. Suggested value: 30.

  • peer.p2p.eip8 = bool forces peer to send handshake message in format defined by EIP-8.


Describes where the blockchain database is saved.

  • database.dir = path is the place to save physical storage files.
  • database.reset = [true/false] resets the database when the application starts when set to true.


Options related to experimental import sync v0.1.

  • database.import.url = URL is the URL to the S3 bucket that hosts the database.
  • database.import.trusted-keys = [] list of trusted public keys to validate legit source.
  • database.import.enabled = [true/false] enable the import sync.

keyvalue.datasource (experimental)

Selects the database that will be used to store the information. Possible options are:

  • leveldb
  • rocksdb (default)

If you wish to switch between the different storage options, for example from leveldb to rocksdb or vice versa, you must restart the node with the import option each time you do so.


Enabling the vm.structured will log all the calls to the VM in the local database. This includes all the contract executions (opcodes). When testing, using this module is the only way to see exceptions.

  • trace = [true/false] enables the vm.structured.
  • dir = foldername the directory where calls are saved.
  • compressed = [true/false] compress data when enabled.
  • initStorageLimit = int the storage limit.

An example:

vm.structured {
    trace = false
    dir = vmtrace
    compressed = true
    initStorageLimit = 10000


Options related to syncing the blockchain:

  • sync.enabled = [true/false] enables the blockchain synchronization. Should be set to true to keep the node updated.
  • sync.max.hashes.ask = int determines the max amount of blocks to sync in a same batch. The synchronization is done in batches of blocks. Suggested value: 10000.
  • sync.peer.count = int minimum peers count used in syncing. Sync may use more peers than this value but always trying to get at least this number from discovery. However, it will continue syncing if it's not reached.
  • sync.timeoutWaitingPeers = int (seconds) timeout to start to wait for syncing requests.
  • sync.timeoutWaitingRequests = int (seconds) expiration time in minutes for peer status.
  • sync.maxSkeletonChunks = int maximum amount of chunks included in a skeleton message.
  • sync.chunkSize = int amount of blocks contained in a chunk, must be 192 or a divisor of 192:
    • 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 192

An example:

sync {
    enabled = true
    max.hashes.ask = 10000
    peer.count = 10
    expectedPeers = 5
    timeoutWaitingPeers = 1
    timeoutWaitingRequest = 30
    expirationTimePeerStatus = 10
    maxSkeletonChunks = 20
    chunkSize = 192


Describes the configuration for the RPC protocol.

  • rpc.providers = [] lists the different providers (up to this moment, just web). rpc.providers.web has a global setting for every web provider, cors.
    • rpc.providers.web.cors = domain restricts the RPC calls from other domains. Default value is localhost.
  • rpc.providers.web options:
    • rpc.providers.web.http defines HTTP configuration:
      • rpc.providers.web.http.enabled = [true/false] enables this web provider. Default value is true.
      • rpc.providers.web.http.port = port is the HTTP-RPC server listening port. By default RSK uses 4444.
      • rpc.providers.web.http.bind_address = address is the HTTP-RPC server listening interface. By default RSK uses localhost.
      • rpc.providers.web.http.hosts = [] is the list of node's domain names or IPs. Check restrictions on valid host names.
      • NOTE: For details on how to connect over HTTP, see HTTP Transport Protocol.
    • defines WebSocket configuration:
      • = [true/false] enables this web provider. Default value is true.
      • = port is the WS-RPC server listening port. By default RSK uses 4445.
      • = address is the WS-RPC server listening interface. By default RSK uses localhost.
      • NOTE: For details on how to connect over WebSockets, see Websockets Transport Protocol.
  • rpc.modules lists of different RPC modules. If a module is not in the list and enabled, its RPC calls are discarded.


modules = [
    { name: "eth", version: "1.0", enabled: "true" },
    { name: "net", version: "1.0", enabled: "true" },
    { name: "rpc", version: "1.0", enabled: "true" },
    { name: "web3", version: "1.0", enabled: "true" },
    { name: "evm", version: "1.0", enabled: "true" },
    { name: "sco", version: "1.0", enabled: "true" },
    { name: "txpool", version: "1.0", enabled: "true" },
    { name: "personal", version: "1.0", enabled: "true" }

It is possible to enable/ disable particular methods in a module.

    name: "evm",
    version: "1.0",
    enabled: "true",
    methods: {
        enabled: ["evm_snapshot", "evm_revert"],
        disabled: [ "evm_reset", "evm_increaseTime"]

To use the RPC miner module you must include:

{ name: "mnr", version: "1.0", enabled: "true" }

Important Info:


You can store your accounts on the node to use them to sign transactions. However, it is not secure to use a wallet in a public node.

wallet {
    enabled = true
    accounts = [
            "publicKey" : "<PUBLIC_KEY>"
            "privateKey" : "<PRIVATE_KEY>"


Scoring is the way the node 'punishes' other nodes when bad responses are sent. Punishment can be done by node ID or address.

  • scoring.nodes.number = int number of nodes to keep scoring.
  • scoring.nodes.duration and scoring.addresses.duration initial punishment duration (in minutes). Default is 10.
  • scoring.nodes.increment and scoring.addresses.increment punishment duration increment (in percentage). Default is 10.
  • scoring.nodes.maximum maximum punishment duration (in minutes). Default is 0.
  • scoring.addresses.maximum maximum punishment duration (in minutes). Default is 1 week.

An example:

scoring {
    nodes {
        number: 100
        duration: 12
        increment: 10
        maximum: 0
    addresses {
        duration: 12
        increment: 10
        maximum: 6000


Check out Configure RSKj node for mining for detailed information about the miner configuration.

A string that describe the name of the configuration. We use:
Regtest regtest
Testnet testnet
Mainnet main


The network interface with wire protocol and peer discovery.

This is the last resort for public IP address when it cannot be obtained by other ways.


The node's public IP address.

If it is not configured, defaults to the IPv4 returned by


It is the path to the genesis file. The folder resources/genesis contains several versions of genesis configuration according to the network the peer will run on. Either one of these, or an absolute path to a file within the filesystem may be used.

Regtest rsk-dev.json
Testnet bamboo-testnet.json
Mainnet rsk-mainnet.json
Custom /home/username/rskj_config/genesis.json


It defines when a transaction is outdated:

  • transaction.outdated.threshold = int is the number of blocks that should pass before pending transaction is removed. Suggested value: 10.
  • transaction.outdated.timeout = int is the number of seconds that should pass before pending transaction is removed. Suggested value: 100 (10 blocks * 10 seconds per block).


It defines the type of gas price calculator being used.


Setting this value to WEIGHTED_PERCENTILE allows for the gas used by the tx to be taken into account.


A boolean that invokes VM program on message received. If the VM is not invoked, the balance transfer occurs anyway. Suggested value: true.


A string that will be included in the hello message of the peer.

Specifies when exactly to switch managing storage of the account on autonomous DB. Suggested value: 1.

If the in-memory storage of the contract exceeds the limit, only deltas are saved.


The path to the Solidity compiler. This is set when you may want to use the node to compile your smart contracts. If you don't have Solidity installed, you can use /bin/false as value.

Receive updates

Get the latest updates from the Rootstock ecosystem