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Node Configuration

Conflux nodes offer a rich set of configuration options, allowing the adjustment of node behavior by modifying these settings. This document provides an overview of the node configuration options and their meanings.

How to configure nodes.​

Configuration File​

The configuration file for Conflux nodes is hydra.toml, and by default, it is located in the run directory where the node program is downloaded. By modifying the configuration options in this file, you can adjust the behavior of the node.

Command Line Parameters​

Nodes can also be configured using command line parameters, where the priority of command line parameters is higher than that of the configuration file. For example, the JSON-RPC port of the node can be specified using the --jsonrpc-http-port parameter.

./conflux --jsonrpc-http-port 12537

A detailed list of parameters can be viewed by running ./conflux -h.

Introduction to Configuration File Options​

node type​

Node types, with three possible values: full, archive, light. The default value is full.

node_type="full"

chain id​

Chain ID, used to identify the Conflux network. The Chain ID for the Core Space mainnet is 1029, and for the eSpace mainnet, it is 1030. The testnets have Chain IDs of 1 and 71, respectively.

chain_id=1029
evm_chain_id=1030

Usually, this configuration option does not need to be modified unless you want to set up a local test network.

Core Space RPC​

Core Space RPC related options.

jsonrpc_http_port=12537 # JSON-RPC HTTP port
jsonrpc_ws_port=12535 # JSON-RPC WebSocket port
public_rpc_apis='safe' # JSON-RPC API namespace list，Multiple namespaces are separated by commas, and using "all" represents enabling all APIs.
poll_lifetime_in_seconds=60 # To open filter related methods

eSpace RPC​

eSpace RPC related options.

jsonrpc_http_eth_port=8545
jsonrpc_ws_eth_port=8546
public_evm_rpc_apis = "evm"

Data indexing​

RPC interfaces related to transactions (tx) and blocks do not support querying historical data by default. If you need to query historical data, you must enable data indexing.

persist_block_number_index=true
persist_tx_index=true

transaction trace​

Parity style transaction trace related options.

executive_trace=true

If you want to enable this configuration, you will need to resynchronize the data.

fullstate​

Fullstate mode supports querying the historical state of the blockchain.

To enable the fullstate mode for a single Space, you can specify the Space name using the single_mpt_space configuration option.

single_mpt_space = "evm" # core-space use "native"

Enabling the fullstate mode for dual spaces.

enable_single_mpt_storage=true

The getLogs RPC method imposes a significant performance overhead on the node. Excessive querying of data with this method can lead to high node loads. To mitigate this, adjust the following configuration option to limit the amount of data requested per getLogs request.

get_logs_filter_max_limit=1000
get_logs_epoch_batch_size=1000
get_logs_filter_max_epoch_range=1000
get_logs_filter_max_block_number_range=2000

log​

Configuration options related to node logs.

log_conf="log.yaml" # log configuration file
log_file="conflux.log"
log_level="info" # The value should be one of "error", "warn", "info", "debug", "trace", "off"

pow mining​

Configuration options related to Proof-of-Work (PoW) mining.

mining_author="cfx:aarc9abycue0hhzgyrr53m6cxedgccrmmyybjgh4xg"
stratum_listen_address="127.0.0.1"
stratum_port=32525
stratum_secret="aaaa"
pow_problem_window_size=1

tx pool​

Transaction pool-related configuration options.

tx_pool_size=50000 # tx pool size
tx_pool_min_native_tx_gas_price=1_000_000_000 # core space tx minimum gas price
tx_pool_min_eth_tx_gas_price=20_000_000_000 # eSpace tx minimum gas price

storage directory​

Blockchain data storage directory configuration:

conflux_data_dir="./blockchain_data"
block_db_dir="./blockchain_data/blockchain_db"
netconf_dir="./blockchain_data/net_config"

pos_key password​

Password for encrypting the POS private key, used to secure the POS private key. By default, this password is set interactively through the command line during the first node startup. You can set this password through the configuration file to avoid command line interaction.

dev_pos_private_key_encryption_password="aaaa"

Or you can pass it through environment variable: CFX_POS_KEY_ENCRYPTION_PASSWORD.

pos config file​

Below are the default paths for the POS configuration file, initial nodes file, and private key file. You can modify these paths to customize the POS configuration.

# PoS config file path
pos_config_path=./pos_config/pos_config.yaml
# PoS initial nodes file path
pos_initial_nodes_path=./pos_config/initial_nodes.json
# PoS account private key file path
pos_private_key_path=./pos_config/pos_key

The release package contains a default PoS configuration file, which can be found in the pos_config directory. The pos_key file will be generated automatically after the first node startup.

storage optimization​

Storage optimization related options.

# Use isolated database for MPT table
# Setting it to true will reduce the disk usage
# Was introduced in v2.3.4 https://github.com/Conflux-Chain/conflux-rust/releases/tag/v2.3.4
use_isolated_db_for_mpt_table=true

Configuration File Example​

For a more comprehensive configuration file example, you can refer to hydra.toml.

FAQs​

I want to run a Core Space RPC node, what parameters do I need to configure?​

node_type="archive"
jsonrpc_http_port=12537
jsonrpc_ws_port=12535
public_rpc_apis='safe'
persist_block_number_index=true
persist_tx_index=true

I want to run an eSpace RPC node, what parameters do I need to configure?​

node_type="archive"
jsonrpc_http_eth_port=8545
jsonrpc_ws_eth_port=8546
public_evm_rpc_apis = "evm"
persist_block_number_index=true
persist_tx_index=true

After my node has been running for a while, I want to enable the executive_trace configuration. Do I need to resynchronize the data?​

Yes, you need to resynchronize the data.

Does the archive node snapshot data provided by the official source include trace data?​

Yes, it does.

After the configuration is modified, do I need to clear the data then restart the node?​

Depending on the situation, sometimes it does, sometimes it doesn’t. If the configuration involves data store or data index, you need to restart the node if the configuration changes, for example:

  • persist_tx_index
  • executive_trace
  • persist_block_number_index

Other restart are generally not required.

I want to access Core Space debug/test RPC methods, what parameters do I need to configure?​

jsonrpc_local_http_port=12539 # this is the port for debug/test RPC methods