Safeheron Hardhat Plugin

This is a Hardhat plugin for integrating with Safeheron.

This plugin will help you to seamlessly integrate Safeheron into your Hardhat development stack.

You can use it to deploy contracts and sign transactions.

Installation

npm install @safeheron/hardhat-safeheron

Usage

Configure your hardhat.config.ts in your hardhat project. Load every secret from environment variables — never paste an RSA private key (or any other credential) into a config file that is tracked by git.

import * as dotenv from "dotenv";
dotenv.config();

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

const config: HardhatUserConfig = {
  // other configs
  // ...
  defaultNetwork: "sepolia",
  networks: {
    hardhat: {},
    sepolia: {
      url: process.env.SEPOLIA_RPC_URL,
      safeheron: {
        baseUrl: process.env.SAFEHERON_BASE_URL,
        apiKey: process.env.SAFEHERON_API_KEY,
        // Load RSA keys from files outside the working tree. The `file:`
        // prefix tells the SDK to read the PEM from disk.
        rsaPrivateKey: `file:${process.env.SAFEHERON_RSA_PRIVATE_KEY_PATH}`,
        safeheronRsaPublicKey: `file:${process.env.SAFEHERON_RSA_PUBLIC_KEY_PATH}`,
        requestTimeout: 10000,
        web3WalletAccountKey: process.env.SAFEHERON_WEB3_ACCOUNT_KEY,
        web3WalletEVMAddress: process.env.SAFEHERON_WEB3_EVM_ADDRESS,
      },
    },
  },
};

export default config;

rsaPrivateKey and safeheronRsaPublicKey also accept a raw PEM string (-----BEGIN ...-----\n...\n-----END ...-----) for ad-hoc local debugging. Do not use that form in any file that may be committed — paste a PEM into a tracked config and it lives in git history forever. For production, prefer a real secrets manager over .env.

Example

A complete, runnable Hardhat project lives in example/. It demonstrates an end-to-end Sepolia deployment with environment-driven configuration. See example/README.md for setup steps.

QA

1. How to get web3WalletAccountKey and web3WalletEVMAddress ?

Please open Safeheron Web Console, choose an Web3 wallet which you want to use, click to go to wallet detail page, then you will see a link like https://www.safeheron.com/console/wallet/account58xxxxcbf34_web3 in your browser address bar, the account58xxxxcbf34 string without _web3 suffix is your web3 account key. And you can also copy your Web3 EVM address at the top of this page.