@zerodevapp/hardhat

ZeroDev Hardhat Plugin

A Hardhat plugin that runs a ZeroDev mock server.

What

Sometimes you want to test you Dapps locally. To do that, ZeroDev provides a mock server to mimick a live paymaster on your local machine. This plugin automatically starts the mock server whenever you run npx hardhat node or hh node without the need for additional setup.

Installation

npm install @zerodevapp/hardhat "@nomiclabs/hardhat-ethers@^2.0.0" "ethers@^5.0.0"

Import the plugin in your hardhat.config.js:

require("@zerodevapp/hardhat");

Or if you are using TypeScript, in your hardhat.config.ts:

import "@zerodevapp/hardhat";

Required plugins

• @nomiclabs/hardhat-ethers

Tasks

This plugin overrides the node task:

$ npx hardhat node

Verifier paymaster deployed at 0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512
ZeroDev mock server listening at http://127.0.0.1:3000
Started HTTP and WebSocket JSON-RPC server at http://127.0.0.1:8545/
...

Environment extensions

This plugin exports a new environment variable under hre.zeroMockUrl which indicates the URL for the mock server. It's usually something like http://127.0.0.1:3030.

Usage

Configure your ZeroDev SDK to use the mock server:

import * as zd from "zerodev-sdk";

await zd.getSigner({
  localMode: true,
  rpcUrl: "http://127.0.0.1:8545/", // address of hardhat JSON-RPC server
  backendUrl: "http://127.0.0.1:3000", // address of ZeroDev mock server

  // the following values can be of any value, see note below
  projectId: "0db3bd22-d8ee-427a-8a00-4017f80d5ddd",
  identity: "google",
  token: "any-token-here",
});

Note: It's currently not possible to configure rate limites or other project dashboard features. The mock server will simply sign everything it receives.