hardhat

Semaphore Hardhat plugin

A Semaphore Hardhat plugin to deploy verifiers and Semaphore contracts.

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This Hardhat plugin provides two simple tasks that can be used to deploy verifiers and Semaphore contracts without any additional configuration.

🛠 Install

npm or yarn

Install the @semaphore-protocol/hardhat package with npm:

npm i @semaphore-protocol/hardhat

or yarn:

yarn add @semaphore-protocol/hardhat

📜 Usage

Import the plugin in your hardhat.config.ts file:

import "@semaphore-protocol/hardhat"
import "./tasks/deploy"

const hardhatConfig: HardhatUserConfig = {
    solidity: "0.8.4"
}

export default hardhatConfig

And use its tasks to create your own deploy task and deploy your contract with a Semaphore address.

import { task, types } from "hardhat/config"

task("deploy", "Deploy a Greeter contract")
    .addOptionalParam("logs", "Print the logs", true, types.boolean)
    .setAction(async ({ logs }, { ethers, run }) => {
        const { address: verifierAddress } = await run("deploy:verifier", { logs, merkleTreeDepth: 20 })

        const { address: semaphoreAddress } = await run("deploy:semaphore", {
            logs,
            verifiers: [
                {
                    merkleTreeDepth: 20,
                    contractAddress: verifierAddress
                }
            ]
        })

        const Greeter = await ethers.getContractFactory("Greeter")

        const greeter = await Greeter.deploy(semaphoreAddress)

        await greeter.deployed()

        if (logs) {
            console.log(`Greeter contract has been deployed to: ${greeter.address}`)
        }

        return greeter
    })