Ethrex as a local development node

February 5, 2026 ยท View on GitHub

Prerequisites

This guide assumes you've read the dev installation guide

Dev mode

In dev mode ethrex acts as a local Ethereum development node. It can be run with the following command

ethrex --dev

Then you can use a tool like rex to make sure that the network is advancing

rex block-number

Rich account private keys are listed at the folder fixtures/keys/private_keys_l1.txt located at the root of the repo. You can then use these keys to deploy contracts and send transactions in the localnet.