External Plugin

This is a third-party plugin. Please report issues in its GitHub Repository(opens new window)

# Hardhat plugin for Ethernal

Ethernal(opens new window) is a block explorer for EVM-based chains. You can use it with your local chains (the Hardhat network for example), or for chains deployed on remote servers.

It allows you to interact with contracts by automatically generating an UI for all read/write methods. You can also read contract variables in any blocks.

To use Ethernal, you need to synchronize blocks, transactions & artifacts with the dashboard. This plugin allows you to easily do that instead of having to run the CLI separately.

If you are looking for more detailed doc about Ethernal: https://doc.tryethernal.com

# Installation

Add hardhat-ethernal to your package.json, and run npm install or yarn

# Login

To authenticate with your Ethernal account, you can either use the ethernal npm package and run ethernal login.

Otherwise, you can pass the env variables ETHERNAL_EMAIL and ETHERNAL_PASSWORD to the Hardhat command. This is especially useful if you are running Ethernal on Ubuntu or in a Docker container as you might run into issues with the keychain on there.

# Synchronize blocks & transactions

In your hardhat-config.jsfile, require the plugin:


That's it! Blocks and transactions will now be synchronized.

# Options

It's possible to disable the synchronization by setting ethernalSync to false on the hre object.

You can also specify which workspace you want to synchronize blocks & transactions to (default to the last one used in the dashboard).

By default, transactions will be traced using experimentalAddHardhatNetworkMessageTraceHook, showing CALLx and CREATEx operations in the dashboard. You can disable this feature with the ethernalTrace flag.

extendEnvironment((hre) => {
    hre.ethernalSync = true;
    hre.ethernalWorkspace = 'Workspace';
    hre.ethernalTrace = false;

# Synchronize artifacts

In your deploy script, first require the plugin:

const ethernal = require('hardhat-ethernal');

Then, push your artifacts to Ethernal, after deploying your contract:

/!\ The name parameter needs to match the name of the contract

const Greeter = await hre.ethers.getContractFactory("Greeter");
const greeter = await Greeter.deploy("Hello, Hardhat!");
await hre.ethernal.push({
    name: 'Greeter',
    address: greeter.address

The following fields will be synchronized:

  • contractName
  • abi
  • ast
  • source