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Mezo Documentation

Configure your Environment

Configure your Hardhat or Foundry development environment for Mezo matsnet.

Before you begin

Before you can deploy applications, you will need an Ethereum wallet with matsnet BTC to pay for the gas fees.

Hardhat

If you are new to Hardhat, use the Hardhat Quick Start guide to learn how to install and initialize your project.

To configure Hardhat to work with Mezo matsnet, set the following items in your Hardhat config file:

  • Add an entry under networks for Mezo matsnet with url: "https://rpc.test.mezo.org" and chainId: 31611.
  • In the solidity settings, add evmVersion: "london".

As an example, see these basic Hardhat config files:

Typescript

import { HardhatUserConfig } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";


const config: HardhatUserConfig = {
  defaultNetwork: "matsnet",
  networks: {
    hardhat: {
    },
    matsnet: {
      url: "https://rpc.test.mezo.org",
      chainId: 31611,
      accounts: ["YOUR_PRIVATE_WALLET_KEY"]
    }
  },
  solidity: {
    version: "0.8.28",
    settings: {
      evmVersion: "london",
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  },
};


export default config;

Javascript

require("@nomiclabs/hardhat-waffle");


module.exports = {
  defaultNetwork: "matsnet",
  networks: {
    hardhat: {
    },
    matsnet: {
      url: "https://rpc.test.mezo.org",
      chainId: 31611,
      accounts: ["YOUR_PRIVATE_WALLET_KEY"]
    }
  },
  solidity: {
    version: "0.8.28",
    settings: {
      evmVersion: "london",
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  },
};

Foundry

If you are new to Foundry, use the Foundry Getting Started guide to learn how to install and initialize your project.

To configure a Foundry project to work with Mezo matsnet, set the following items in your Foundry TOML file under [profile.default] or a preferred profile:

  • Chain ID: chain_id = 31611
  • RPC: eth_rpc_url = "https://rpc.test.mezo.org"
  • EVM Version: evm_version = 'london'

As an example, see the example Foundry TOML:

[profile.default]
src = "src"
out = "out"
libs = ["lib"]
chain_id = 31611
eth_rpc_url = "https://rpc.test.mezo.org"
evm_version = 'london'