Configuration

This page covers the basic configuration options for running an L1 node with ethrex. Full list of options can be found at the CLI reference

Sync Modes

Ethrex supports different sync modes for node operation:

• full: Downloads and verifies the entire chain.
• snap: Fast sync using state snapshots (recommended for most users).

Set the sync mode with:

ethrex --sync <mode>

File Locations

By default, ethrex stores its data in:

• Linux: ~/.local/share/ethrex
• macOS: ~/Library/Application Support/ethrex

You can change the data directory with:

ethrex --datadir <path>

Ports

Default ports used by ethrex:

• 8545: JSON-RPC (HTTP)
• 8551: Auth JSON-RPC
• 30303: P2P networking (TCP/UDP)
• 9090: Metrics

You can change ports with the corresponding flags: --http.port, --authrpc.port, --p2p.port, --discovery.port, --metrics.port.

All services listen on 0.0.0.0 by default, except for the auth RPC, which listens on 127.0.0.1. This can also be changed with flags (e.g., --http.addr).

Log Levels

Control log verbosity with:

ethrex --log.level <level>

Levels: error, warn, info (default), debug, trace

Dev Mode (Localnet)

For local development and testing, you can use dev mode:

ethrex --dev

This runs a local network with block production and no external peers. This network has a list of predefined accounts with funds for testing purposes.